CN101064464A - Hybrid permanent magnet type electric rotating machine and manufacturing method thereof - Google Patents

Abstract

A stator is constructed by winding excitation coils around respective main poles in a hybrid permanent magnet type electric rotating machine. A rotor is constructed by fixing a first rotor unit, which consists of a pair of rotor cores and a magnetic material sandwiched between the rotor cores, and a second rotor unit, which has the same construction as the first rotor unit, to a rotation shaft. The rotor is assembled to the stator to form an assembled body. The magnet material of the first rotor unit is magnetized in the axial direction by a magnetizing flux passing through a half of the assembled body in the axial direction. The magnet material of the second rotor unit is magnetized in the axial direction in an opposite polarity by a magnetizing flux passing through the remaining half of the assembled body in the axial direction.

Description

Hybrid permanent magnet type electric rotating machine and manufacture method thereof

Technical field

The present invention relates to hybrid (following brief note is HB) permanent magnet rotating machine and manufacture method thereof of in the OA equipment of the image of handling facsimile machine, ink-jet printer, laser printer or photocopier etc., using.

Background technology

Figure 14, Figure 15 represent 2 phase HB type stepping motors of prior art, and Figure 14 is a vertical section, and Figure 15 is the front elevation of the relation of expression rotor core and stator core.Thisstepping motor 100 hasstator 110 androtor 130, andstator 110 has 2stator cores 111 of 8 main poles mutually, androtor 130 is fixed on rotation and is supported in freely on the rotatingshaft 120 of inside of thisstator.Stator 110 constitutes by thestator core 111 that support 112, the 113 clamping lamination silicon steel plates that form with nonmagnetic material from axial both sides form, on each themain pole 111a that is formed on thestator core 111, coiling is wound onto theexcitation coil 114 on the bobbin 115.Onstator core 111, as shown in figure 15, it is radial that 8 main poles are configured to towards interior all sides, on the tip of eachmain pole 111a, forms a plurality ofinductor 111b respectively.

Rotor 130 usefulness a pair of rotor cores 131,132 is clamped in the discoideuspermanent magnet 133 that direction of principal axis magnetized and constitutes.Around aside rotor core 131, form a plurality oflittle tooth 130a as shown in figure 15.On the opposing party'srotor core 132, also form the little tooth of similar number.Each rotor core 131,132 departs from 1/2 tooth pitch mutually and is fixed on the rotation axis 120.In addition, the 121, the 122nd, bearing.

In addition, on 8main pole 111a ofstator core 111, as among Figure 15 with A phase, B phase, A ' phase, B ' mutually shown in like that, at the coil of the 1 not shown phase amount of on 14, reeling.In this occasion, owing to constituting exciting current, the main poles that are positioned at 180 degree opposite location places become identical polar, so the attraction of conduct normal direction is radially offseted all the time, the torque composition of the tangential direction of rotor periphery only appears.

But in the structure (full main pole structure) of above-mentioned prior art, the main pole number of stator is many, the manufacturing cost height.Therefore, when stator is got 4 main poles as economizing main pole structure (half main pole structure), for example in the occasion thatrotor core 131 is drawn to upside as N polarity,rotor core 132 is drawn to downside as S polarity, take place because the uneven electromagnetic force that radial attraction force causes, take place because the couple that so-called layback causes is vibrated or noise and produce, positioning accuracy also worsens.

On the other hand, in No. 6781260 communiques of United States Patent (USP), the stepping motor of province's main pole that vibration is little, torque is big (half main pole) structure of 4 main poles is disclosed.During disclosed motor is constructed in this communique, in the stator of coil of having reeled, prepare two groups of rotor units with a pair of rotor core clamping permanent magnet that one pole has magnetized on its plane annularly, be that core makes the homopolarity of the magnetic pole that magnetizes of permanent magnet relatively install with the motor reel, and dispose to such an extent that the polarity of little tooth of above-mentioned two groups of rotor cores adjacent to each other is identical mutually.In the motor structure of this mode, because rotor core is 4, so compare with existing 2 structure, disperse the radial direction attraction of respective amount and be able to balance, therefore there is not uneven torque force, because vibration or noise that the gap of bearing etc. causes are more favourable than prior motor, become low vibration low noise.In addition, the motor of the same size of the full main pole structure shown in this stepping motor and Figure 14,15 relatively can obtain the torque of about twice in theory.Perhaps, can enlarge the air gap between stator and the rotor, improve fraction defective and improve reliability in the occasion that obtains the torque identical with the motor of full main pole structure.And then, use the rare earth element magnet of high energy with respect to full main pole motor, and can use the cheap such permanent magnet of for example ferrite, therefore can expect to reduce the effect of price.

But, in No. 6781260 communiques of United States Patent (USP), in the disclosed motor structure, two permanent magnets need be magnetized to diamagnetism, do not establish suitable Magnitizing method.That is the magnetic flux of permanent magnet by the magnetic flux density that reaches capacity magnetizes, but after finishing, rotor or motor carry out magnetized occasion, when the used existing known use magnetizer of hollow coil when magnetizing two permanent magnets simultaneously, because the magnetization magnetic flux is mutually exclusive on direction of principal axis, so the magnetization of permanent magnet part is insufficient.In addition, when every next setting-up time difference of two permanent magnets is magnetized, the magnetic flux that has magnetized a side rotor unit permanent magnet leaks to the opposing party's rotor unit, this leakage magnetic flux is arranged with the opposite magnetic of magnetic that the permanent magnet with the opposing party's rotor unit is magnetized to and wishes, perhaps make the problem of permanent magnet degaussing of the opposing party's of having magnetized rotor unit.Therefore prior art is to use with the component-assembled rotor behind the monomer magnet magnetization, but in such method, has when assembling permanent magnet attraction iron powder or dust cause the assembling difficulty, and the problem that the reliability of the electric rotating machine of finishing is reduced.

Summary of the invention

First purpose of the present invention provides a kind of manufacture method, it can behind assembling electric rotating machine or the rotor suitably to as disclose in No. 6781260 communiques of United States Patent (USP), two permanent magnets that rotor comprises the HB formula permanent magnet rotating machine of two group rotor unit magnetize.

In addition, second purpose of the present invention provides the HB formula permanent magnet rotating machine that is fit to above-mentioned manufacture method.

The manufacture method of the HB formula permanent magnet rotating machine of first form of the present invention is characterised in that, for realizing above-mentioned first purpose, from the magnetic of polygon or ring-type is radial a plurality of main poles are set, on each main pole of the stator core that is formed with a plurality of inductors on the tip of each main pole, coiling magnet exciting coil and constitute 24 main poles, 3,3 main poles or 5 stators of 5 main poles mutually mutually mutually

A plurality of little teeth being arranged on the outer peripheral face, departing from 1/2 tooth pitch of little tooth and the clip magnet material constitutes between two rotor cores disposing the first rotor unit and be fixed on the common rotational axis with second rotor unit of this first rotor unit same structure at circumferencial direction, the position of little tooth that makes approaching rotor core is identical and constitute rotor

First support in the outside by being configured in the first rotor unit and be configured in second support in the outside of second rotor unit is guaranteed the air gap of stipulating and is rotated assemble rotor freely with respect to stator,

First magnetize and use magnetic circuit by what the peripheral part that uses yoke will comprise the part of rotation axis of first bracket side and stator core in the outside of assembly linked up, make the magnetization magnetic flux on direction of principal axis, connect first support and the first rotor unit, and generally perpendicularly connect stator core with respect to rotation axis, thereby make and connect the axial only about half of of assembly, and on direction of principal axis the ferromagnetic material of magnetization the first rotor unit

Second magnetize and use magnetic circuit by what the peripheral part that uses yoke will comprise the part of rotation axis of second bracket side and stator core in the outside of assembly linked up, make the magnetization magnetic flux on direction of principal axis, connect second support and second rotor unit, and generally perpendicularly connect stator core with respect to rotation axis, thereby connect the axial remaining only about half of of assembly, on direction of principal axis, the ferromagnetic material of second rotor unit is magnetized to ferromagnetic material rightabout with the first rotor unit.

According to above-mentioned first form, because being installed, rotor back magnetization ferromagnetic material forms permanent magnet on stator, so in the assembling of electric rotating machine iron powder or dust can be attached to rotor on, assembling operation becomes easily, and can improve the reliability of electric rotating machine.

In addition, have the magnetizer of yoke as described above, can suitably magnetize the permanent magnet of first, second rotor unit with opposite respectively polarity by use.

And then, have the magnetizer of yoke by use, with use utilized existing hollow coil magnetizer occasion relatively, can magnetize with little electric power.

In addition, assembled electric rotating machine has two groups of rotor units that comprise permanent magnet respectively, therefore compare with existing occasion with a group rotor unit, even the magnetic flux density of each permanent magnet is little also enough, can use the cheap magnet of cost of the such ferromagnetic material of binding magnet or ferrite lattice, the existing structure of the magnet of expensive ferromagnetic material relatively can reduce the cost of electric rotating machine integral body with using neodium magnet etc.In addition, because rotor has two group rotor unit,, can suppress to carry out the assembling operation of stator easily because coiling is simplified in the generation of the vibration that causes of uneven torque, noise etc. simultaneously so the main pole number of stator can prevent uneven torque at least.

In first form, also can use and have first simultaneously and magnetize with magnetize magnetizer with magnetic circuit of magnetic circuit and second, magnetize the ferromagnetic material of the first rotor unit and the ferromagnetic material of second rotor unit simultaneously, can also only have first and magnetize and magnetize with magnetic circuit one side's magnetizer after magnetizing the ferromagnetic material of the first rotor unit using with magnetic circuit and second, take out assembly from magnetizer, the direction of principal axis counter-rotating also is set in the magnetizer once more, magnetizes the ferromagnetic material of second rotor unit.

So-called " approaching rotor core " not only refers to two rotor cores directly near the occasion that forms a rotor core, refers to that also two rotor cores are at middle clamping miscellaneous part and approaching occasion.

The manufacture method of the HB formula permanent magnet rotating machine of second form of the present invention is characterised in that, for realizing above-mentioned first purpose, from the magnetic of polygon or ring-type is radial a plurality of main poles are set, on each main pole of the stator core that is formed with a plurality of inductors on the tip of each main pole, coiling magnet exciting coil and constitute 24 main poles, 3,3 main poles or 5 stators of 5 main poles mutually mutually mutually

A plurality of little teeth being arranged on the outer peripheral face, departing from 1/2 tooth pitch of little tooth and the clip magnet material constitutes between two rotor cores disposing the first rotor unit and be fixed on the common rotational axis in a circumferential direction with second rotor unit of this first rotor unit same structure, the position of little tooth that makes approaching rotor core is identical and constitute rotor

What the peripheral part of the rotor core of the inboard of the side by the outside rotor iron core by will comprising the first rotor unit with yoke in the outside of rotor or the part of peripheral part and the first rotor unit linked up first magnetizes and uses magnetic circuit, make the magnetization magnetic flux on direction of principal axis, connect the ferromagnetic material of the first rotor unit, on direction of principal axis, magnetize the ferromagnetic material of the first rotor unit thus

What will comprise with yoke by the outside at rotor that the peripheral part of rotor core of the inboard of the part of the side of outside rotor iron core of second rotor unit or peripheral part and second rotor unit links up second magnetizes and uses magnetic circuit, make the magnetization magnetic flux on direction of principal axis, connect the ferromagnetic material of second rotor unit, on direction of principal axis, the ferromagnetic material of second rotor unit is magnetized to the direction opposite with the ferromagnetic material of the first rotor unit thus

First support in the outside by being configured in the first rotor unit and be configured in second support in the outside of second rotor unit rotates assemble rotor freely with guaranteeing the air gap stipulated with respect to stator.

According to above-mentioned second form because form permanent magnet at assemble rotor back magnetization ferromagnetic material, so in the assembling of rotor iron powder or dust can be attached to rotor on, assembling operation becomes easily, and can improve reliability.

In addition, have the magnetizer of yoke as described above, can suitably magnetize first, second rotor unit with opposite respectively polarity by use.

And then, have the magnetizer of yoke by use, with use utilized existing hollow coil magnetizer occasion relatively, can magnetize with little electric power.

In addition, the electric rotating machine of assembling and first homomorphosis, its effect is as described above, in the cost that can reduce electric rotating machine integral body, can suppress to carry out the assembling operation of stator easily because coiling is simplified in the generation of the vibration that causes of uneven torque, noise etc. simultaneously.

In second form, also same with above-mentioned first form, can magnetize simultaneously, time difference magnetization.

In addition, in above-mentioned first, second any one form, also can be when assemble rotor, between the first rotor unit and second rotor unit across electric conducting material.

HB formula permanent magnet rotating machine of the present invention is characterised in that, to have for realizing above-mentioned second purpose:

From the magnetic of polygon or ring-type is radial a plurality of main poles are set, on each main pole of the stator core that is formed with a plurality of inductors on the tip of each main pole, the coiling magnet exciting coil and constitute 2 mutually 4 main poles, 3 mutually 3 main poles or 5 mutually 5 main poles stator and

Making across electric conducting material is having a plurality of little teeth, departs from a circumferential direction and be clamped in the first rotor unit that the permanent magnet that magnetized on the direction of principal axis constitutes between two rotor cores of 1/2 tooth pitch configuration of little tooth and have with second rotor unit of this first rotor unit same structure and the permanent magnet that magnetized on opposite direction approaching on the outer peripheral face, and be fixed on the common rotational axis, make the position of the little tooth of approaching rotor core become identical and rotor that constitute

First, second support in the outside of rotor by being configured in first, second rotor unit is guaranteed with respect to stator core that the air gap ground of stipulating rotates and is supported freely.

According to above-mentioned structure, flow through eddy current because when the magnetization ferromagnetic material, be arranged in the discoid electric conducting materials such as epitrochanterian copper or aluminium, so reduced leakage magnetization magnetic flux to approaching the opposing party's rotor.Therefore, can access the structure of the electric rotating machine of the manufacture method that is fit to above-mentioned first, second form of the present invention of use.

Description of drawings

Fig. 1 is the skiagraph of stepping motor of manufacture method that is suitable for the HB formula permanent magnet rotating machine of first～the 4th embodiment of the present invention.

Fig. 2 is the front elevation of the relation of the rotor core of stepping motor of presentation graphs 1 and stator core.

Fig. 3 is the skiagraph of magnetizer in the manufacture method of the expression first embodiment of the present invention.

Fig. 4 is the skiagraph of magnetizer in the manufacture method of the expression second embodiment of the present invention.

Fig. 5 is the skiagraph of magnetizer in the manufacture method of the expression third embodiment of the present invention.

Fig. 6 is the skiagraph of magnetizer in the manufacture method of the expression fourth embodiment of the present invention.

Fig. 7 is the skiagraph of stepping motor of manufacture method that is suitable for the HB formula permanent magnet rotating machine of the 5th～the 9th embodiment of the present invention.

Fig. 8 is the skiagraph of magnetizer in the manufacture method of the expression fifth embodiment of the present invention.

Fig. 9 is the skiagraph of magnetizer in the manufacture method of the expression sixth embodiment of the present invention.

Figure 10 is the skiagraph of magnetizer in the manufacture method of the expression seventh embodiment of the present invention.

Figure 11 is the skiagraph of magnetizer in the manufacture method of the expression eighth embodiment of the present invention.

Figure 12 is the skiagraph of magnetizer in the manufacture method of the expression ninth embodiment of the present invention.

Figure 13 is the front elevation of magnetizer shown in Figure 12.

Figure 14 is the skiagraph of the hybrid type stepping motor of prior art.

Figure 15 is the front elevation of the relation of the rotor core of stepping motor of expression Figure 14 and stator core.

Embodiment

Below, 9 embodiment of the manufacture method of HB formula permanent magnet rotating machine of the present invention are described with reference to the accompanying drawings.

First embodiment～the 4th embodiment represents to make the method for disclosed electric rotating machine in No. 6781260 communiques of United States Patent (USP) having been carried out improved HB formula permanent magnet rotating machine of the present invention, and the 5th embodiment～the 9th embodiment represents to make the method that has with the HB formula permanent magnet rotating machine of the basic structure that disclosed electric rotating machine is identical in No. 6781260 communiques of United States Patent (USP).In addition, first form that first embodiment and the 5th embodiment are corresponding above-mentioned, second form that second embodiment and the 6th embodiment are corresponding above-mentioned.The 3rd embodiment and the 7th embodiment are the variation of first embodiment, the 5th embodiment, and the 4th embodiment and the 8th embodiment are the variation of second embodiment, the 6th embodiment.

The structure as the HB formula permanent magnet rotating machine (hereinafter referred to as stepping motor) of stepping motor of the manufacture method that is suitable for first embodiment～the 4th embodiment is described according to Fig. 1 and Fig. 2 at first.

Fig. 1 is the skiagraph of stepping motor, and Fig. 2 is the front elevation of inside of seeing the motor of Fig. 1 from the direction of rotation axis.But in Fig. 2, omitted the diagram of coil.

Thisstepping motor 1A is the HB stepping motor of the inner-rotor type that configurationHB type rotor 20 constitutes in the stator of being made up of the magnetic of 4 main poles structure 10.Stator 10 has thestator core 11 that 4main pole 11a of A phase, B phase, A ' phase, B ' phase is constituted towards inboard radial configuration from approximate tetragonal magnetic as shown in Figure 2.On the point of therotor 20 of facing eachmain pole 11a, be formed with a plurality oflittle tooth 11b respectively.In addition, as shown in Figure 1, on eachmain pole 11a, across thebobbin 15coiling coils 14 of insulating material.4 coils that are wound on eachmain pole 11a are coupled together, make that oppositely excitation constitutes 2 phase coils respectively with the coil of the relative main pole of 180 degree.Thus, constitute thestator 10 of 2 phases, 4 main poles.With respect to 2 phase motor shown in Figure 14,15 are full main pole structures and have 8 main poles, and the 2 phase motor of embodiment are province's main pole (half main pole) structures, have 4 main poles.

Stator core 11 constitutes by the lamination silicon steel plate, as shown in Figure 1, and from ofsupport 12,13 clampings of axial both sides quilt with nonmagnetic materials such as aluminium formation.

On the other hand,rotor 20 as shown in Figure 1, constitute being clamped in thefirst rotor unit 20A thatpermanent magnet 23a that direction of principal axis magnetized constitutes between a pair ofrotor core 21a, the 22a and between a pair ofrotor core 21b, 22b, being clamped in thesecond rotor unit 20B thatpermanent magnet 23b that direction of principal axis magnetized constitutes equally, across being fixed on the commonrotational axis 30 under the state of discoideus electric conductingmaterial 24 adjacency.Each rotor core all is same size, same configuration.Permanent magnet 23a, 23b magnetize on opposite direction for direction of principal axis.For example, in this embodiment, the outsiderotor iron core 21b of the outsiderotor iron core 21a of thefirst rotor unit 20A and thesecond rotor unit 20B is magnetized to N polarity,inboard rotor core 22a and 22b are magnetized to S polarity.Each rotor core is made of the lamination silicon steel plate.

In addition, onrotor core 21a, form a plurality oflittle tooth 20T as shown in Figure 2 on the first-class tooth pitch of circumference ground.Other 3rotor core 22a, 21b and 22b on form little tooth too.The 1/2 tooth pitch ground configuration that tworotor core 21a, the 22a of thefirst rotor unit 20A staggerlittle tooth 20T in a circumferential direction, same, the 1/2 tooth pitch ground configuration thatrotor core 21b, the 22b of thesecond rotor unit 20B staggerslittle tooth 20T in a circumferential direction.Then, therotor core 22b of the inboard of therotor core 22a of inboard of thefirst rotor unit 20A and thesecond rotor unit 20B is set, it is identical that the position oflittle tooth 20T is become, thereby also become identical in the position of theintermedian denticle 20T of outsiderotor iron core 21a, the 21b of each unit.

Aselectric conducting material 24, in Fig. 1, represented the occasion with the rotor core same diameter, but also can be littler than the diameter of rotor core, can use the discoid member or the scale copper that form the hole that connectsrotation axis 30 in central authorities.Shape wishes it is circular, but also can be polygon.

The relation of thelittle tooth 20T of thelittle tooth 11b of themain pole 11a ofstator core 11 androtor core 21a, 22a, 21b, 22b is as follows.That is for example in excitation 1 phase only, the relative occasion oflittle tooth 11b of thelittle tooth 20T ofrotor core 21a, the 21b of the N utmost point and themain pole 11a of the stator core that is geomagnetic into theS utmost point 11 of first phase, thelittle tooth 11b ofmain pole 11a of thestator core 11 of the 180 degree opposition sides that are geomagnetic into the N utmost point of first phase becomeslittle tooth 20T withrotor core 21a, the 21b of the N utmost point, and non-relative (tooth and ditch are relative, electric angle is the phase places of 180 degree) relation, become relative with thelittle tooth 20T ofrotor core 22a, the 22b of the S utmost point.Thelittle tooth 20T of thelittle tooth 11b of the statormain pole 11 of second phase that not be magnetized this moment androtor core 21a, 21b, 22a, 22b becomes the phase relation of 90 degree.

By being separately positioned on thebearing 31,32 in thesupport 12,13, rotate therotation axis 30 of supporting to be fixed with first,second rotor unit 20A, 20B freely.Thus, between thelittle tooth 20T of thelittle tooth 11b of themain pole 11a ofstator core 11 androtor core 21a, 22a, 21b, 22b, guarantee air gap,rotor 20 can be rotated together withrotation axis 30.

In addition, in the above description,rotor 20 shows as at direction of principal axis and thefirst rotor unit 20A (being made of 21a, 22a, 23a) and thesecond rotor unit 20B (being made of 21b, 22b, 23b), two group rotor unit are linked up and constitutes, use twopermanent magnet 23a, 23b but also can show as, byrotor core 22a, the 22b of these two permanent magnet clampings with one with respect to therotor core 21a that is positioned at their both sides of two, a special rotor formation of 21b tooth position deviation 1/2.Configurationelectric conducting material 24 betweenrotor core 22a, the 22b of inboard.

By two group rotor unit are set like this, can eliminate the radially uneven electromagnetic force that combination took place by 4 main pole stators and existing HB type rotor (a group rotor unit is only arranged).That is therotor 20 of the steppingmotor 1A of embodiment because be boundary's left-right symmetric at direction of principal axis with theelectric conductor 24 of central portion, works so the HB rotor that claims during as two is offset the couple of uneven electromagnetic force.Therefore have and offset all the time because the excellent results of the couple that radially uneven electromagnetic force produces.

In addition, in Fig. 1, Fig. 2, represent with 2 phase formulas, but be not limited thereto, can be province's main pole stator of 3 phase 3 main poles or 5 phases, 5 main poles and special rotor combination with two permanent magnets, constitute as 3 phases or 5 phase HB type stepping motors, also can in 2 phases or 3 brushless motors that equate or synchronous motor, use.

Below, the torque of having made up the occasion of above-mentionedrotor 20 in the stator of thestator 10 of 4 main poles of embodiment shown in Figure 2 and 8 main poles shown in Figure 14 is described.The torque T that can represent 1 phase with following formula (1)₁

T1＝NNriΦm (1)

Here, N is a coil turn, and Nr is the rotor number of teeth, and i is an electric current, and Φ m is the interlinkage flux of the coil of that send from rotor and magnetic flux permanent magnet.

Suppose that both line footpaths are identical, total number of turns Nt equates.The total magnetic flux of sending from rotor, (8 main poles are 8 * 6=48 for example to equal 48 in both number of teeth of stator, 4 main poles are occasions of 4 * 12=48), because can ignore both stator core the magnetic resistance difference and be approximately identical value Φ t, so respectively as N8, N4, Φ 8, Φ 4, following formula is set up the number of turn of each 1 main pole of 8 main pole machines, 4 main pole machines, magnetic flux.

Φ8＝Φt/8 (2)

Φ4＝Φt/4 (3)

N8＝Nt/8 (4)

N4＝Nt/4 (5)

According to (1)～(5) formula, torque T8, the T4 of 8 main pole machines, 4 main pole machines are as follows respectively.

T8＝2×4(Nt/8)Nri(Φt/8)

＝NtNriΦt/8 (6)

T4＝2×2(Nt/4)Nri(Φt/4)

＝NtNriΦt/4 (7)

According to (6), (7), 4 main pole machines are compared with the motor of existing 8 main pole machines, export about 2 times torque.

The rotor number of teeth Nr of the hope of the occasion of this 4 main pole derives from following formula.

90/Nr＝(-/+){(360/4)-360n/Nr} (8)

In the formula, n is the integer more than 1.

The step angle of representing this structure when the left side and the right of (8) formula if it is put in order, then can obtain (9) formula.

Nr＝4n±1 (9)

By satisfying formula (9), become the symmetric construction of 2 phases, 4 main poles.Nr=75 during n=19 for example is because (90/Nr) degree becomes step angle in 2 cameras, so can obtain the electric rotating machine of the stator of symmetric figure with 1.2 degree step angles.In addition, in the occasion of Nr=50,,, but can obtain the 2 phase stepping motors that step angle 1.8 is spent so stator is an asymmetrical shape because do not satisfy (9) formula.

Because the stator core of 2 phases, 4 main poles is 90 degree symmetries, so when the lamination silicon steel plate, can spend the eachrotation 90 of the die-cut steel plate of punch press and carry out lamination.In the time can rotating stack, can eliminate the deviation of stack thickness, eliminate the magnetic direction of silicon steel plate, become good motor characteristic.

Below, the steppingmotor 1A by embodiment uses two permanent magnets, with the prior art shown in Figure 14,15 2 mutually the stepping motor of a magnet of use of 8 main pole formulas illustrate with comparing and promptly use low etc. magnet also can obtain high torque.At 2 mutually in the stepping motor of 8 main poles of prior art, being relict flux density Br 1.3[T] rare earth element magnet (neodium magnet) of (tesla) uses as permanent magnet.Relative therewith, in the application's occasion, because be 24 main poles and two magnet are arranged mutually, so the relict flux density Br of magnet tries to achieve with following formula.

Br＝1.3[T]×(1/2)(3/2)(4/8)＝0.4875[T] (10)

1/2 of formula (10) be because with compare with the common HB type rotor that 8 main poles with the identical prior art of the excircle area of the rotor of a magnet excitation make up and roughly become 1/2, therefore the magnetic flux that produces from permanent magnet also can be half, the magnetic flux density of magnet also can be half if the area of magnet is identical, in addition, (3/2) be because the length of magnetic path of permanent magnet reduces by half thereby the magnetic permeability of iron core portion becomes about 2 times merely, but consider the reduction of the magnetic flux density of air gap or magnetic circuit, because torque and magnetic permeability is approximately 3/2 times.(4/8) means (4 main poles/8 main poles), draw torque and the main pole number is inversely proportional to from the relation of above-mentioned (6) formula and (7) formula.

Use the magnet of the value of the Br in should (10) formula can access and use Br to be 1.3[T] the torque of 8 main pole motor same degree of neodium magnet.The result of formula (10) is unanimous on the whole with the magnetic field analysis result with computer.

The value of Br in (10) formula of being somebody's turn to do is equivalent to ferrite lattice.Ferrite lattice is 0.5[T at Br], its demagnetization curve is being got in second quadrant of magnetic flux density for the coordinate vertical, that coercive force is level and is being become straight line under the situation about coercive force (confining force) Hcj=275KA/m, the magnetic capacity that adds the permanent magnet in the magnetic circuit as slope the straight line that has passed through initial point and the intersection point of demagnetization curve become operating point, but, set up so (6) formula is approximate because this operating point magnetic flux density is proportional with the Br of permanent magnet substantially.Ferrite lattice is compared very cheap with rare earth element magnet, though use two also cheap than neodium magnet.That is use 0.5[T] following magnet can access the torque of abundant practicality.So long as 0.5[T] following magnet, do not limit the ferrite sintered body magnet of dry type or wet type, also can be bonding (plastics) magnet of resin as adhesive.Limit in the medium quantity batch processing of ferrite sintered body magnet for example is that profile is about 2mm for 25mm thickness, than those thin words mostly occur greatly the cutting bad.Adopt bad solution of words cutting of binding magnet.

By making up 2 phase 4main pole stators 10 and above-mentionedrotors 20 with two rotor units, by when suppressing uneven electromagnetic force, adopting 0.5[T] below low-grade permanent magnet, phase time also can access the torque that is equal to or doubles in the motor of the same size of the such rare earth element magnet of the neodymium sintered magnet of the employing of prior art high price or SmCo magnet.

Then, about the manufacture method, particularly magnetization method of the steppingmotor 1A of the foregoing description, represent 4 embodiment.

First embodiment

In the manufacture method of the HB of first embodiment of the present invention formula permanent magnet rotating machine, coilingcoil 14 constitutesstator 10 on themain pole 11a of eachstator core 11, onrotation axis 30, be fixed on a pair ofrotor core 21a, clip magnet material between the 22a (below use with magnetize after theidentical symbol 23a of permanent magnet describe) thefirst rotor unit 20A, with at a pair ofrotor core 21b, clip magnet material between the 22b (below use with magnetize after theidentical symbol 23b of permanent magnet describe) thesecond rotor unit 20B and constituterotor 20, by atfirst support 12 of the outside of thefirst rotor unit 20A configuration with atsecond support 13 of the outside ofsecond rotor unit 20B configuration, rotate assemblerotor 20 freely with guaranteeing the air gap stipulated with respect to stator 10.Thus, under the state that ferromagnetic material is not magnetized, finish the structure of stepping motor 1A.This state is become assembly.

Then this assembly is installed on themagnetizer 50 as shown in Figure 3.Magnetizer 50 constitutes therotation axis 30 of assembly is surrounded assembly as central shaft, can be by once setting just magnetize simultaneously twoferromagnetic material 23a, 23b.

Magnetizer 50 has discoid first yoke 51 and second yoke 52 that are formed with the hole that rotation axis 30 connected that is configured in axial both sides and the 3rd yoke 53 that is configured in the covering side between them.The flat section of the 3rd yoke 53 is the T font substantially, forms the stator core 11 of the tip of the projection 53a that stretches out to the inside from periphery contact assembly.Then, in the space between the projection 53a that is formed on first yoke 51 and the 3rd yoke 53, all sides form stair-stepping insulator bobbin 54 in making that first support 12 from direction of principal axis and peripheral direction and assembly is relative and disposing like that, the first usefulness coil 55 that magnetizes of reeling on this insulator bobbin 54.Equally, in the space between the projection 53a that is formed on second yoke 52 and the 3rd yoke 53, all sides form stair-stepping insulator bobbin 56 in making that second support 13 from direction of principal axis and peripheral direction and assembly is relative and disposing like that, the second usefulness coil 57 that magnetizes of reeling on this insulator bobbin 56.In addition, it is desirable to each yoke is formed by the high material of the saturation flux density as the pure iron.Also can use the silicon steel plate of lamination to form yoke.

By on above-mentionedmagnetizer 50, assembly being installed, followingly magnetize withcoil 55,57 energisings to first, second like that, form first, second and magnetize and use magnetic circuit, magnetizeferromagnetic material 23a, 23b.

The part of therotation axis 30 that first magnetizes will comprise first support, 12 sides in the outside of assembly byfirst yoke 51 and the3rd yoke 53 as magnetic with magnetic circuit and the peripheral part ofstator core 11 link up and constitute.Suppose owing in magnetizing, flowing through the magnetization magnetic flux that magnetizing current produces and around magnetizing, form the closed-loop path withcoil 55 with coil 55.Therefore, the part of this magnetization magnetic flux does not directly enterstator core 11 byferromagnetic material 23a fromrotor core 21a, returnsfirst yoke 51 via the 3rd yoke 53.When the magnetization magnetic flux surpasses the saturation flux density (at the about 1.5[T of the occasion that is made of silicon steel plate]) ofrotor core 21b, more than half magnetization magnetic flux connectsferromagnetic material 23a and arrives inboardrotor iron core 22a, from connectingstator core 11 here, returnfirst yoke 51 via the 3rd yoke 53.That is, the magnetization magnetic flux connectsfirst support 12 and thefirst rotor unit 20A at direction of principal axis, connectstator core 11 with respect torotation axis 30 near normal ground, connect thus assembly axial cardinal principle half, theferromagnetic material 23a of magnetization thefirst rotor unit 20A on direction of principal axis.

The part of therotation axis 30 that second magnetizes will comprise second support, 13 sides in the outside of assembly bysecond yoke 52 and the3rd yoke 53 as magnetic with magnetic circuit and the peripheral part ofstator core 11 link up and constitute.Owing to a part that flows through the magnetization magnetic flux that magnetizing current takes place in magnetizing withcoil 57 does not directly enterstator core 11 byferromagnetic material 23b fromrotor core 21b, returnsecond yoke 52 via the 3rd yoke 53.On the other hand, more than half magnetization magnetic flux connectsferromagnetic material 23b and arrivesinboard rotor core 22b, from connectingstator core 11 here, returnssecond yoke 52 via the 3rd yoke 53.That is, the magnetization magnetic flux connectssecond support 13 and thesecond rotor unit 20B at direction of principal axis, connectstator core 11 with respect torotation axis 30 near normal ground, thus connect assembly axial remaining cardinal principle half, theferromagnetic material 23b of the magnetizationsecond rotor unit 20B on direction of principal axis.

In addition, because first magnetize magnetize withcoil 55 and second with in thecoil 57 mutually in opposite direction upper reaches overcurrent, so theferromagnetic material 23b of theferromagnetic material 23a of thefirst rotor unit 20A and thesecond rotor unit 20B magnetizes on opposite direction mutually about direction of principal axis.

Here, if first,second support 12,13 or bearing the 31, the 32nd, magnetic then connects the magnetization magnetic flux and can become greatly, but in an embodiment, these are nonmagnetic materials such as aluminium.Therefore, between yoke and ferromagnetic material, there is big gap.Therefore, fully arrive ferromagnetic material, first,second yoke 51,52 is designed, make to form outstanding part that magnetizing also is positioned on the periphery of this ledge withcoil 55,57 inrotation axis 30 sides for making the magnetization magnetic flux cross such gap.Therefore, the section configuration ofinsulator bobbin 54,56 adopts the shape that the ladder difference is set in inside as shown in Figure 3.

In above-mentioned magnetizing handled, in the time will making sufficient magnetization magnetic flux pass through theferromagnetic material 23a of thefirst rotor unit 20A, its part becomes leakage magnetic flux, in the occasion that does not haveelectric conducting material 24, connectrotor core 22b,ferromagnetic material 23b, therotor core 21b of thesecond rotor unit 20B,ferromagnetic material 23b is with the magnetic opposite with the magnetic of hope, that is is magnetized in the direction identical with thepermanent magnet 23a of the first rotor unit.But, the assembly of present embodiment is because exist electric conductingmaterial 24 between two rotor units, so when this leakage magnetic flux arrives electric conductingmaterial 24, inelectric conducting material 24, produce eddy current and offset it, prevent that the ferromagnetic material of thesecond rotor unit 20B is magnetized on undesirable direction.

Equally, magnetic flux for theferromagnetic material 23b that is used to magnetize thesecond rotor unit 20B, when leakage magnetic flux arrives electric conductingmaterial 24, inelectric conducting material 24, produce eddy current and offset it, prevent that the ferromagnetic material of thefirst rotor unit 20A from magnetizing on undesirable direction.

In the manufacture method of the first above-mentioned embodiment, magnetize as first, second and to use magnetic circuit, outside theyoke 51,52,53 ofmagnetizer 50,use rotor core 21a, 22a, 21b, 22b, stator core 11.Therefore magnetizing magnetic flux density can not be than the saturation flux density of rotor core or stator core (about 1.5[T in silicon steel plate]) greatly.Therefore, be about 1.2[T in order to magnetize relict flux density Br] the neodymium sintered magnet, magnetic flux deficiency sometimes, but be about 0.5[T in order to magnetize relict flux density Br] ferrite lattice, can access sufficient magnetic flux.Therefore, themagnetizer 50 that uses among first embodiment be suitable for as use ferrite lattice or with its with the device as the steppingmotor 1A of the object of the present embodiment of permanent magnet such as the binding magnet of the relict flux density of degree.

Can magnetize theferromagnetic material 23a of thefirst rotor unit 20A and theferromagnetic material 23b of thesecond rotor unit 20B simultaneously, the time difference also can be set magnetizes.In any occasion, in magnetizing, flow through electric current withcoil 55,57, make separately magnetize with magnetic circuit in flow through suitable magnetic flux.According to first embodiment, magnetize permanent magnet because can instator 10, be assembled with under the state ofrotor 20 of steppingmotor 1A, so when assembling, there is not magnetic force, rotor is not attracted on the stator during assembling, assembling is easy, and does not adsorb iron powder or dust, can improve reliability.

In addition, in above-mentionedmagnetizer 50, the3rd yoke 53 is one things, but also can be divided into two-part parts use on the left and right directions in the drawings withrotation axis 30 vertical planes by merga pass.In this occasion,, wish to use pure iron as conjugated material.

Second embodiment

In the manufacture method of the HB of second embodiment of the present invention formula permanent magnet rotating machine, before installing to rotor set in the stator, after finishing the structure of rotor, be assembled into like that in the magnetizer rotor is following, the ferromagnetic material of the permanent magnet that constitutes rotor is partly magnetized.

That is as shown in Figure 4, thefirst rotor unit 20A that is fixed onclip magnet material 23a between a pair ofrotor core 21a, the 22a on therotation axis 30 and between a pair ofrotor core 21b, 22b thesecond rotor unit 20B ofclip magnet material 23b constituterotor 20, thisrotor 20 is installed in magnetization twoferromagnetic material 23a, 23b on themagnetizer 60, forms permanent magnet.

Themagnetizer 60 of second embodiment hasfirst yoke 61 cylindraceous andsecond yoke 62 that are formed with the hole thatrotation axis 30 connected that are configured in axial both sides, be configured to around they periphery, the half section is roughly the3rd yoke 63 and the4th yoke 64 of U-shaped.In the space that is formed on the ring-type betweenfirst yoke 61 and the3rd yoke 63, held being wound on first on theinsulator bobbin 65 and magnetizing with coil 66.Equally, in the space that is formed on the ring-type betweensecond yoke 62 and the4th yoke 64, held being wound on second on theinsulator bobbin 67 and magnetizing withcoil 68.

The end face of the inboard offirst yoke 61 forms stepped, makes from every side aroundrotation axis 30 andbearing 31, from therotor core 21a of direction of principal axis contact the first rotor unit 20A.Equally, the end face of the inboard ofsecond yoke 62 forms stepped, makes from centering onrotation axis 30 and bearing 32 on every side, contacts therotor core 21b of thesecond rotor unit 20B from direction of principal axis.

The3rd yoke 63 is close contactfirst yoke 61 in axial end, and is in the periphery of therotor core 22a of the inboard of central side contact thefirst rotor unit 20A, perhaps right across clearance plane seldom.Equally, the4th yoke 64 is close contactsecond yoke 62 in axial end, contacts the periphery ofrotor core 22b of the inboard of thesecond rotor unit 20B at central side, and is perhaps right across clearance plane seldom.Hope forms each yoke by pure iron.

Byrotor 20 is installed on above-mentionedmagnetizer 60, magnetize withcoil 66,68 energisings to first, second, form first, second and magnetize and use magnetic circuit, magnetize ferromagnetic material.

First magnetizes is used as the part of side offirst yoke 61 of magnetic and the outsiderotor iron core 21a that the3rd yoke 63 will comprise thefirst rotor unit 20A andinboard rotor core 22a with magnetic circuit by the outside atrotor 20 peripheral part links up and constitutes.Owing in magnetizing, flowing through magnetization magnetic flux that magnetizing current takes place connects thefirst rotor unit 20A at direction of principal axis outsiderotor iron core 21a,ferromagnetic material 23a withcoil 66, arriveinboard rotor core 22a, from returningfirst yoke 61 via the3rd yoke 63 here.Thus, magnetize theferromagnetic material 23a of thefirst rotor unit 20A at direction of principal axis.

Second magnetizes is used as the part of side ofsecond yoke 62 of magnetic and the outsiderotor iron core 21b that the4th yoke 64 will comprise thesecond rotor unit 20B andinboard rotor core 22b with magnetic circuit by the outside atrotor 20 peripheral part links up and constitutes.Owing in magnetizing, flowing through magnetization magnetic flux that magnetizing current takes place connects thesecond rotor unit 20B at direction of principal axis outsiderotor iron core 21b,ferromagnetic material 23b withcoil 68, arriveinboard rotor core 22b, from returningsecond yoke 62 via the4th yoke 64 here.Thus, magnetize theferromagnetic material 23b of thesecond rotor unit 20B at direction of principal axis.

In addition, because first magnetize magnetize withcoil 66 and second with in thecoil 68 mutually in opposite direction upper reaches overcurrent, so theferromagnetic material 23b of theferromagnetic material 23a of thefirst rotor unit 20A and thesecond rotor unit 20B magnetizes on opposite direction mutually about direction of principal axis.In addition, because be provided with electric conductingmaterial 24, leakage magnetic flux is cancelled by the eddy current that takes place inelectric conducting material 24, can prevent the ferromagnetic material of the leakage magnetic flux of side's coil to undesirable direction magnetization the opposing party.

Can magnetize theferromagnetic material 23a of thefirst rotor unit 20A and theferromagnetic material 23b of thesecond rotor unit 20B simultaneously, the time difference also can be set magnetizes.In any occasion, in magnetizing, flow through electric current withcoil 66,68, make separately magnetize with magnetic circuit in flow through suitable magnetic flux.

The occasion that as first embodiment, in stator, magnetizes under the state of assemble rotor, because add magnetic circuit as the support of nonmagnetic material or bearing, stator core, so the gap is big, can not obtain being the about 1.2[T of relict flux density such as magnetization neodymium sintered magnet sometimes] the sufficient magnetic flux density of permanent magnet.In the method for second embodiment,, in magnetic circuit, do not add support or stator core, to rotor set so the gap is little because before installing on the stator.Because forming the saturation flux density of the pure iron of each yoke is 2.2[T] about, so even also can access sufficient magnetic flux density for the permanent magnet of magnetization neodymium sintered magnet etc.

As above-mentioned bymagnetizer 60 magnetization ferromagnetic materials after, by atfirst support 12 of thefirst rotor unit 20A outside configuration andsecond support 13 that disposes in thesecond rotor unit 20B outside, guarantee that forstator 10 air gap of stipulating rotates assemblerotor 20 freely.Thus, finish steppingmotor 1A.

In addition,, then can increase the first, the3rd yoke 61,63, can be more prone to magnetization for changeing in the contact area ofiron core 21a, 21b if before on therotor 20bearing 31,32 being installed, magnetize.

The 3rd embodiment

The manufacture method of the HB formula permanent magnet rotating machine of the third embodiment of the present invention is compared with the occasion of first embodiment, under finishing the state that rotor set is installed to the assembly in the stator, this point that magnetizes of magnet body that carries out rotor-side is identical, but uses magnetizer shown in Figure 5 70 these points different as magnetizer.

That is, coilingcoil 14 constitutesstator 10 onstator core 11, thefirst rotor unit 20A that is fixed onclip magnet material 23a between a pair ofrotor core 21a, the 22a on therotation axis 30 and between a pair ofrotor core 21b, 22b thesecond rotor unit 20B ofclip magnet material 23b constituterotor 20,first support 12 in the outside by being configured in thefirst rotor unit 20A and be configured insecond support 13 in the outside of thesecond rotor unit 20B rotates assemblerotor 20 freely with guaranteeing the air gap stipulated with respect to stator 10.Thus, under the state that ferromagnetic material is not magnetized, finish the structure of stepping motor 1A.This state is called assembly.

Then this assembly is installed on themagnetizer 70 as shown in Figure 5.Magnetizer 70 constitute therotation axis 30 of assembly as central shaft surround assembly axial cardinal principle half, can be by once setting the ferromagnetic material that magnetizes.Under this state, behind theferromagnetic material 23a of thefirst rotor unit 20A that magnetizes, take out assemblies frommagnetizer 70, make the direction of principal axis counter-rotating magnetizer 70 of packing into once more, theferromagnetic material 23b of thesecond rotor unit 20B that magnetizes.

Magnetizer 70 has discoidfirst yoke 71 that is formed with the hole thatrotation axis 30 connects and covers its side and form L shaped and contactsecond yoke 72 of stator core 11.In addition, in the space that is formed betweenfirst yoke 71 andsecond yoke 72, all sides form stair-steppinginsulator bobbin 73 in the configuration, and are feasible relative from direction of principal axis and peripheral direction withfirst support 12 of assembly, reel on thisinsulator bobbin 73 and magnetize with coil 74.In themagnetizer 70 of the 3rd embodiment, basically axial half the structure with themagnetizer 50 that takes out the Fig. 3 shown in first embodiment is identical, but the width of the part of second yoke, 72contact stator cores 11 be set to can coveringstator iron core 11 thickness.It is desirable to form yoke fully by pure iron.

Half of thefirst rotor unit 20A side by assembly is installed on above-mentionedmagnetizer 70 to magnetizing withcoil 74 energisings, forms first and magnetizes and use magnetic circuit, magnetizes theferromagnetic material 23a of thefirst rotor unit 20A.

The peripheral part that first magnetizes is used as the part offirst yoke 71 of magnetic and therotation axis 30 thatsecond yoke 72 will comprise first support, 12 sides andstator core 11 by the outside at assembly with magnetic circuit links up and constitutes.Arriveinboard rotor core 22a fromrotor core 21a byferromagnetic material 23a owing in magnetizing, flowing through the magnetization magnetic flux that magnetizing current takes place,, returnfirst yoke 71 throughsecond yoke 72 from connectingstator core 11 here with coil 74.That is, the magnetization magnetic flux connectsfirst support 12 and thefirst rotor unit 20A at direction of principal axis, connectstator core 11 with respect torotation axis 30 near normal ground, connect thus assembly axial cardinal principle half, at theferromagnetic material 23a of direction of principal axis magnetization thefirst rotor unit 20A.

Then, assembly is taken out frommagnetizer 70, the direction of principal axis counter-rotating is installed in themagnetizer 70 once more, and half back that thesecond rotor unit 20B side is installed is given and magnetized withcoil 74 energisings, form second thus and magnetize and use magnetic circuit, magnetize theferromagnetic material 23b of thesecond rotor unit 20B.

Second magnetizes is used asfirst yoke 71 of magnetic and the part of therotation axis 30 thatsecond yoke 72 will comprise second support, 13 sides and the peripheral part ofstator core 11 with magnetic circuit by the outside at assembly and gets up to form continuously.Arriveinboard rotor core 22b fromrotor core 21b byferromagnetic material 23b owing in magnetizing, flowing through the magnetization magnetic flux that magnetizing current takes place,, returnfirst yoke 71 throughsecond yoke 72 from connectingstator core 11 here with coil 74.That is, the magnetization magnetic flux connectssecond support 13 and thesecond rotor unit 20B at direction of principal axis, connectstator core 11 with respect torotation axis 30 near normal ground, connect assembly axial cardinal principle half, magnetize theferromagnetic material 23b of thesecond rotor unit 20B at direction of principal axis.

In addition, because when above-mentioned secondary magnetizes, assembly is reversed at direction of principal axis, even so identical in the sense of current that magnetizes with flowing in thecoil 74, also can on about the opposite mutually direction of direction of principal axis, magnetize theferromagnetic material 23a of thefirst rotor unit 20A and theferromagnetic material 23b of the second rotor unit 20B.In addition, because be provided with electric conductingmaterial 24, so can prevent that the leakage magnetic flux of a side coil from magnetizing the opposing party's ferromagnetic material to undesirable direction by the eddy currents counteract leakage magnetic flux that inelectric conducting material 24, takes place.

Spended time is wanted in the magnetization of themagnetizer 70 of the 3rd embodiment, but magnetizing assembly can be done more small-sizedly than the occasion of Fig. 3.In addition, because can be only decide the axial thickness in the face ofstator core 11 ofsecond yoke 72 to a side ferromagnetic material as object, so can select material or the corresponding optimal value of thickness with ferromagnetic material.That is, in themagnetizer 50 of Fig. 3, because magnetize two ferromagnetic materials simultaneously with two coils, so theprojection 53a of the3rd yoke 53 as common magnetic circuit utilization, even the maximum thickness that also becomes stator core of the axial thickness of the magnetic circuit that can use for a ferromagnetic material 1/2.Relative therewith, in themagnetizer 70 of Fig. 5, because use each of magnetizing two ferromagnetic materials of a coil, so the axial thickness of the magnetic circuit that can use for a magnet in the part of thecontact stator core 11 ofsecond yoke 72 is defined unlike Fig. 3, can thickly reach the thickness of the thickness that equals stator core 11.Therefore, can set the thickness of yoke, the feasible magnetic resistance that necessitates according to the magnetic flux density corresponding with the material of ferromagnetic material.

The 4th embodiment

The manufacture method of the HB formula permanent magnet rotating machine of the fourth embodiment of the present invention is compared with the occasion of second embodiment, before installing to rotor set in the stator, this point that magnetizes of ferromagnetic material that carries out rotor is identical, but uses magnetizer shown in Figure 6 80 these points different as magnetizer.

Promptly, be fixed on thefirst rotor unit 20A that clipsferromagnetic material 23a between a pair ofrotor core 21a, the 22a on therotating shaft 80, between a pair ofrotor core 21b, 22b, clipping thesecond rotor unit 20B offerromagnetic material 23b and constituterotor 20, thisrotor 20 is installed in themagnetizer 80, magnetizes 2ferromagnetic material 23a, 23b and become permanent magnet.

Themagnetizer 80 of the 4th embodiment constitute withrotation axis 30 as centralshaft surround rotor 20 axial cardinal principle half, can be by once setting the ferromagnetic material that magnetizes.Behind theferromagnetic material 23a of thefirst rotor unit 20A that magnetizes under this state, take outrotor unit 20 frommagnetizer 80, after making the direction of principal axis counter-rotating, be installed in themagnetizer 80 theferromagnetic material 23b of thesecond rotor unit 20B that magnetizes once more.

Magnetizer 80 and to take out axial half the structure ofmagnetizer 60 of Fig. 4 identical hasfirst yoke 81 cylindraceous that is formed with the hole thatrotation axis 30 connected,second yoke 82 that is configured to be roughly around the half section of its periphery U-shaped.In addition, in the space that is formed betweenfirst yoke 81 andsecond yoke 82, take in and be wound on magnetizing on theinsulator bobbin 83 withcoil 84.

The end face of the inboard offirst yoke 81 from around aroundrotation axis 30 andbearing 31, form stepped and from therotor core 21a of direction of principal axis contact the first rotor unit 20A.The end insecond yoke 82 left side in axial figure is contactfirst yoke 81 closely, and the periphery of therotor core 22a of the inboard of the end on right side contact thefirst rotor unit 20A is perhaps relative across gap seldom among the figure.It is desirable to form each yoke by pure iron.

Half of thefirst rotor unit 20A side byrotor 20 is installed on above-mentionedmagnetizer 80 to magnetizing withcoil 84 energisings, forms first and magnetizes and use magnetic circuit, magnetizes theferromagnetic material 23a of thefirst rotor unit 20A.

First magnetizes is used as the part of side offirst yoke 81 of magnetic and the outsiderotor iron core 21a thatsecond yoke 82 will comprise thefirst rotor unit 20A andinboard rotor core 22a with magnetic circuit by the outside atrotor 20 peripheral part links up and constitutes.Owing in magnetizing, flowing through magnetization magnetic flux that magnetizing current takes place connects thefirst rotor unit 20A at direction of principal axis outsiderotor iron core 21a,ferromagnetic material 23a withcoil 84, arriveinboard rotor core 22a, from returningfirst yoke 81 viasecond yoke 82 here.Thus, magnetize theferromagnetic material 23a of thefirst rotor unit 20A at direction of principal axis.

Thenrotor 20 is taken out frommagnetizer 80, the direction of principal axis counter-rotating is installed in themagnetizer 80 once more, switch oncoil 84 to magnetizing by half back that thesecond rotor unit 20B side is installed, formation second is magnetized and is used magnetic circuit, magnetizes theferromagnetic material 23b of thesecond rotor unit 20B.

Second magnetizes is used as the part of side offirst yoke 81 of magnetic and the outsiderotor iron core 21b thatsecond yoke 82 will comprise thesecond rotor unit 20B andinboard rotor core 22b with magnetic circuit by the outside atrotor 20 peripheral part links up and constitutes.Owing in magnetizing, flowing through magnetization magnetic flux that magnetizing current takes place connects thesecond rotor unit 20B at direction of principal axis outsiderotor iron core 21b,ferromagnetic material 23b withcoil 84, arriveinboard rotor core 22b, from returningfirst yoke 81 viasecond yoke 82 here.Thus, magnetize theferromagnetic material 23b of thesecond rotor unit 20B at direction of principal axis.

In addition, becauserotor 20 is reversed at direction of principal axis, even so identical in the sense of current that magnetizes with flowing in thecoil 84, also can on about the opposite mutually direction of direction of principal axis, magnetize theferromagnetic material 23a of thefirst rotor unit 20A and theferromagnetic material 23b of the second rotor unit 20B.In addition, because be provided with electric conductingmaterial 24, so can prevent that the leakage magnetic flux of a side coil from magnetizing the opposing party's ferromagnetic material to undesirable direction by the eddy currents counteract leakage magnetic flux that inelectric conducting material 24, takes place.

After as described above bymagnetizer 80 magnetization ferromagnetic materials,, rotate assemblerotor 20 freely byfirst support 12 andsecond support 13 with guaranteeing the air gap stipulated with respect to stator 10.Thus, finish steppingmotor 1A.

The structure of the HB formula permanent magnet rotating machine (stepping motor) of the manufacture method that is suitable for the 5th embodiment～the 9th embodiment then, is described according to Fig. 7.Fig. 7 is the skiagraph of stepping motor 1B.No. 6781260 disclosed electric rotating machine of communique of the basic structure of this steppingmotor 1B and United States Patent (USP) is identical.Because front elevation is identical with Fig. 2, so the diagram of omission.

This steppingmotor 1B is the HB type stepping motor of the inner-rotor type that configurationHB type rotor 20C constitutes in the stator of being made up of the magnetic of 4 main poles structure 10.With the difference of steppingmotor 1A shown in Figure 1 be the structure of rotor 20C.That is, therotor 20C of steppingmotor 1B is by left side beginning from figure, sequentially the firstrotor iron core 21a,permanent magnet 23a,second rotor core 22,permanent magnet 23b, thirdtrochanter iron core 21b constituted being fixed under the state of contact closely mutually on the rotation axis 30.The firstrotor iron core 21a is identical with the thickness of thirdtrochanter iron core 21b, the thickness thatsecond rotor core 22 has the twice of the first rotor iron core 21a.On the periphery of each rotor core and shown in Figure 2ly similarly form a plurality of little teeth.

Each unit of above-mentioned rotor can be divided into two group rotor unit and consider.That is, the first rotor unit constitutes with axial half clampingpermanent magnet 23a of the firstrotor iron core 21a andsecond rotor core 22, and second rotor unit constitutes with remaining half clampingpermanent magnet 23b of the thirdtrochanter iron core 21b and second rotor core 22.In addition, on thisrotor 20C, the steppingmotor 1A that is not configured in Fig. 1 goes up theelectric conducting material 24 of configuration.The steppingmotor 1A of other structure and Fig. 1 is identical.

The steppingmotor 1B of Fig. 7 and the steppingmotor 1A of Fig. 1 are same, by two group rotor unit are set, can eliminate the uneven electromagnetic force radially that the combination by the HB type rotor (a group rotor unit is only arranged) of 4 main pole stators and prior art takes place.In addition, even use the little magnet of relict flux density such as ferrite lattice or binding magnet, also can obtain high torque.

The 5th embodiment

In the manufacture method of the HB of fifth embodiment of the present invention formula permanent magnet rotating machine, coilingcoil 14 constitutesstator 10 onstator core 11, fixedrotor iron core 21a, 22,21b andferromagnetic material 23a, 23b onrotation axis 30, constituterotor 20C, byfirst support 12 andsecond support 13, rotate assemblerotor 20C freely with guaranteeing the air gap stipulated with respect to stator 10.Thus, under the state of unmagnetized ferromagnetic material, finish the structure of stepping motor 1B.This state is called assembly.

Then this assembly is installed in themagnetizer 50 as shown in Figure 8.Magnetizer 50 is with shown in Figure 3 identical.Magnetize withcoil 55,57 energisings to first, second by assembly being installed in thismagnetizer 50 back, form first, second and magnetize and use magnetic circuit, magnetizeferromagnetic material 23a, 23b.

The peripheral part that first magnetizes is used as the part offirst yoke 51 of magnetic and therotation axis 30 that the3rd yoke 53 will comprise first support, 12 sides andstator core 11 by the outside at assembly with magnetic circuit links up and constitutes.Connectferromagnetic material 23a from the firstrotor iron core 21a and arrivesecond rotor core 22 owing in magnetizing, flowing through magnetization magnetic flux that magnetizing current takes place,, returnfirst yoke 51 through the3rd yoke 53 from connectingstator core 11 here with coil 55.Thus, magnetize theferromagnetic material 23a of the first rotor unit at direction of principal axis.

The peripheral part that second magnetizes is used as the part ofsecond yoke 52 of magnetic and therotation axis 30 that the3rd yoke 53 will comprise second support, 13 sides andstator core 11 by the outside at assembly with magnetic circuit links up and constitutes.Connectferromagnetic material 23b from thirdtrochanter iron core 21b and arrivesecond rotor core 22 owing in magnetizing, flowing through magnetization magnetic flux that magnetizing current takes place,, returnsecond yoke 52 through the3rd yoke 53 from connectingstator core 11 here with coil 57.Thus, magnetize theferromagnetic material 23b of second rotor unit at direction of principal axis.

In addition, because first magnetize magnetize withcoil 55 and second with in thecoil 57 in opposite direction upper reaches overcurrent mutually, so theferromagnetic material 23b of theferromagnetic material 23a of the first rotor unit and second rotor unit is magnetized on opposite mutually direction about direction of principal axis.

The 6th embodiment

In the manufacture method of the HB of sixth embodiment of the present invention formula permanent magnet rotating machine, coilingcoil 14 constitutesstator 10 onstator core 11, fixedrotor iron core 21a, 22,21b andferromagnetic material 23a, 23b onrotation axis 30, constituterotor 20C, but before being assembled into thisrotor 20C in thestator 10, as shown in Figure 9, be installed on themagnetizer 60 and magnetize two ferromagnetic materials and form permanent magnets.

Themagnetizer 60 of the 6th embodiment is with shown in Figure 4 identical.Afterrotor 20C is installed in thismagnetizer 60, magnetize withcoil 66,68 energisings, form first, second and magnetize and use magnetic circuit, magnetizeferromagnetic material 23a, 23b to first, second.

The peripheral part that first magnetizes is used as the part offirst yoke 61 of magnetic and the side that the3rd yoke 63 will comprise the firstrotor iron core 21a andsecond rotor core 22 by the outside atrotor 20C with magnetic circuit links up and constitutes.Connect the firstrotor iron core 21a,ferromagnetic material 23a owing in magnetizing, flowing through the magnetization magnetic flux that magnetizing current takes place at direction of principal axis, arrivesecond rotor core 22, from returningfirst yoke 61 via the3rd yoke 63 here with coil 66.Thus, magnetize theferromagnetic material 23a of the first rotor unit at direction of principal axis.

The peripheral part that second magnetizes is used as the part ofsecond yoke 62 of magnetic and the side that the4th yoke 64 will comprise thirdtrochanter iron core 21b andsecond rotor core 22 by the outside atrotor 20C with magnetic circuit links up and constitutes.Connect thirdtrochanter iron core 21b,ferromagnetic material 23b owing in magnetizing, flowing through the magnetization magnetic flux that magnetizing current takes place at direction of principal axis, arrivesecond rotor core 22, from returningsecond yoke 62 via the4th yoke 64 here with coil 68.Thus, magnetize theferromagnetic material 23b of second rotor unit at direction of principal axis.

In addition, because first magnetize magnetize withcoil 66 and second with in thecoil 68 in opposite direction upper reaches overcurrent mutually, so theferromagnetic material 23b of theferromagnetic material 23a of thefirst rotor unit 20A and thesecond rotor unit 20B is magnetized on opposite mutually direction about direction of principal axis.

As mentioned above, after bymagnetizer 60 magnetization ferromagnetic materials,, guarantee with respect tostator 10 to walk around in the air gap ground of stipulating to move assemble rotor 20c freely byfirst support 12 and second support 13.Thus, finish steppingmotor 1B.

In addition,, then can increase the contact area of the first, the3rd yoke 61,63 androtor core 21a, 21b, can be more prone to magnetization if before on therotation axis 30bearing 31,32 being installed, magnetize.

The 7th embodiment

In the manufacture method of the HB of seventh embodiment of the present invention formula permanent magnet rotating machine, coilingcoil 14 constitutesstator 10 onstator core 11, fixedrotor iron core 21a, 22,21b andferromagnetic material 23a, 23b onrotation axis 30, constituterotor 20C, byfirst support 12 andsecond support 13, rotate assemblerotor 20C freely with guaranteeing the air gap stipulated with respect to stator 10.Thus, under the state of unmagnetized ferromagnetic material, finish the structure of stepping motor 1B.This state is called assembly.

Then this assembly is installed on themagnetizer 70 as shown inFigure 10.Magnetizer 70 is with shown in Figure 5 identical.Give and magnetize by half of the firstrotor iron core 21a side of assembly being installed on thismagnetizer 70 back, form first and magnetize and use magnetic circuit, magnetize theferromagnetic material 23a of the first rotor unit withcoil 74 energisings.

The peripheral part that first magnetizes is used as the part offirst yoke 71 of magnetic and therotation axis 30 thatsecond yoke 72 will comprise first support, 12 sides andstator core 11 by the outside at assembly with magnetic circuit links up and constitutes.Arrivesecond rotor core 22 from the firstrotor iron core 21a byferromagnetic material 23a owing in magnetizing, flowing through the magnetization magnetic flux that magnetizing current takes place,, returnfirst yoke 71 throughsecond yoke 72 from connectingstator core 11 here with coil 74.Thus, magnetize theferromagnetic material 23a of the first rotor unit at direction of principal axis.

Then assembly is taken out frommagnetizer 70, the direction of principal axis counter-rotating is installed in themagnetizer 70 once more, and give in half back that thirdtrochanter iron core 21b side is installed and to magnetize withcoil 74 energisings, form second thus and magnetize and use magnetic circuit, magnetize theferromagnetic material 23b of second rotor unit.

The peripheral part that second magnetizes is used as the part offirst yoke 71 of magnetic and therotation axis 30 thatsecond yoke 72 will comprise second support, 13 sides andstator core 11 by the outside at assembly with magnetic circuit links up and constitutes.Arrivesecond rotor core 22 from thirdtrochanter iron core 21b byferromagnetic material 23b owing in magnetizing, flowing through the magnetization magnetic flux that magnetizing current takes place,, returnfirst yoke 71 throughsecond yoke 72 from connectingstator core 11 here with coil 74.Thus, magnetize theferromagnetic material 23b of second rotor unit at direction of principal axis.

In addition, because when above-mentioned secondary magnetizes, assembly is reversed at direction of principal axis, even so identical in the sense of current that magnetizes with flowing in thecoil 74, also can on about the opposite mutually direction of direction of principal axis, magnetize theferromagnetic material 23a of the first rotor unit and theferromagnetic material 23b of second rotor unit.

The 8th embodiment

In the manufacture method of the HB of eighth embodiment of the present invention formula permanent magnet rotating machine, coilingcoil 14 constitutesstator 10 onstator core 11, fixedrotor iron core 21a, 22,21b andferromagnetic material 23a, 23b onrotation axis 30, constituterotor 20C, but before being assembled into thisrotor 20C in thestator 10, as shown in figure 11, be installed on themagnetizer 80 and magnetize two ferromagnetic materials and form permanent magnet.

Themagnetizer 80 of the 8th embodiment is with shown in Figure 6 identical.Give and magnetize by half of the firstrotor iron core 21a side being installed on thismagnetizer 80 back, form first and magnetize and use magnetic circuit, magnetize theferromagnetic material 23a of the first rotor unit withcoil 84 energisings.

The peripheral part that first magnetizes is used as the part offirst yoke 81 of magnetic and the side thatsecond yoke 82 will comprise the firstrotor iron core 21a andsecond rotor core 22 by the outside atrotor 20C with magnetic circuit links up and constitutes.Connect the firstrotor iron core 21a,ferromagnetic material 23a owing in magnetizing, flowing through the magnetization magnetic flux that magnetizing current takes place at direction of principal axis, arrivesecond rotor core 22, from returningfirst yoke 81 viasecond yoke 82 here with coil 84.Thus, magnetize theferromagnetic material 23a of the first rotor unit at direction of principal axis.

Thenrotor 20C is taken out frommagnetizer 80, the direction of principal axis counter-rotating is installed in themagnetizer 80 once more, and give in half back that thirdtrochanter iron core 21b side is installed and to magnetize withcoil 84 energisings, form second thus and magnetize and use magnetic circuit, magnetize theferromagnetic material 23b of second rotor unit.

The peripheral part that second magnetizes is used as the part offirst yoke 81 of magnetic and the side thatsecond yoke 82 will comprise thirdtrochanter iron core 21b andsecond rotor core 22 by the outside atrotor 20C with magnetic circuit links up and constitutes.Connect thirdtrochanter iron core 21b,ferromagnetic material 23b owing in magnetizing, flowing through the magnetization magnetic flux that magnetizing current takes place at direction of principal axis, arrivesecond rotor core 22, from returningfirst yoke 81 viasecond yoke 82 here with coil 84.Thus, magnetize theferromagnetic material 23b of second rotor unit at direction of principal axis.

In addition, because above-mentioned secondary makesrotor 20C reverse at direction of principal axis when magnetizing, even, also can on mutually opposite direction, magnetize theferromagnetic material 23a of the first rotor unit and theferromagnetic material 23b of second rotor unit about direction of principal axis so it is identical to flow through the sense of current that magnetizes withcoil 84.

After as described above bymagnetizer 80 magnetization ferromagnetic materials,, rotate assemblerotor 20C freely byfirst support 12 andsecond support 13 with guaranteeing the air gap stipulated with respect to stator 10.Thus, finish steppingmotor 1B.

In addition,, then can increase the contact area offirst yoke 81 androtor core 21a, 21b, can be more prone to magnetization if before on therotation axis 30bearing 31,32 being installed, magnetize.

The 9th embodiment

In the manufacture method of the HB of ninth embodiment of the present invention formula permanent magnet rotating machine, coilingcoil 14 constitutesstator 10 onstator core 11, fixedrotor iron core 21a, 22,21b andferromagnetic material 23a, 23b onrotation axis 30, constituterotor 20C, byfirst support 12 andsecond support 13, rotate assemblerotor 20C freely with guaranteeing the air gap stipulated with respect to stator 10.Thus, under the state of unmagnetized ferromagnetic material, finish the structure of stepping motor 1B.This state is called assembly.

Then, this assembly is installed on themagnetizer 90 as shown inFigure 12.Magnetizer 90 constitute assembly withrotation axis 30 as central shaft surround assembly axial cardinal principle half, can be by once setting the ferromagnetic material that magnetizes.Behind the side's of magnetizing under this stateferromagnetic material 23a, take out assembly frommagnetizer 90, on direction of principal axis, make its counter-rotating be installed in themagnetizer 90 the opposing party's of magnetizingferromagnetic material 23b once more.

Magnetizer 90 has discoidfirst yoke 91 that is formed with the hole thatrotation axis 30 connected andsecond yoke 92 cylindraceous that covers itsside.Second yoke 92 forms 8main pole 92a that extend to center position radially from cylindrical portions may as shown in figure 13, andinsulator bobbin 93 is installed on each main pole, reels on thisinsulator bobbin 93 and magnetizes with coil 94.8main pole 92a form the periphery ofcontact stator core 11 respectively.

In addition, Figure 13 is illustrated in the example of the 8 coil magnetizers that reeling on 8 main poles magnetizes uses coil, but the shape at motor is foursquare occasion, the 4 coil magnetizers that making on 4 main poles reels magnetizes with coil are simple, also can determine suitable a plurality of main poles according to the shape of motor.

It is desirable to form each yoke with pure iron.

Half back of the firstrotor iron core 21a side by assembly is installed on thismagnetizer 90 is given and is magnetized withcoil 94 energisings, forms first and magnetizes and use magnetic circuit, magnetizes theferromagnetic material 23a of the first rotor unit.

The peripheral part that first magnetizes is used as the part offirst yoke 91 of magnetic and therotation axis 30 thatsecond yoke 92 will comprise first support, 12 sides andstator core 11 by the outside at assembly with magnetic circuit links up and constitutes.Owing in magnetizing, flow through withcoil 94 magnetization magnetic flux that magnetizing current takes place fromsecond yoke 92 byfirst yoke 91, arrivesecond rotor core 22 from the firstrotor iron core 21a byferromagnetic material 23a, from connectingstator core 11 here, return second yoke 92.Thus, magnetize theferromagnetic material 23a of the first rotor unit at direction of principal axis.

Then, assembly is taken out frommagnetizer 90, and reversing on direction of principal axis is installed in themagnetizer 90 once more, gives in half back that thirdtrochanter iron core 21b side is installed to magnetize withcoil 94 energisings, formation second is magnetized and is used magnetic circuit, magnetizes theferromagnetic material 23b of second rotor unit.

The peripheral part that second magnetizes is used as the part offirst yoke 91 of magnetic and therotation axis 30 thatsecond yoke 92 will comprise second support, 13 sides andstator core 11 by the outside at assembly with magnetic circuit links up and constitutes.Owing in magnetizing, flow through withcoil 94 magnetization magnetic flux that magnetizing current takes place fromsecond yoke 92 byfirst yoke 91, arrivesecond rotor core 22 from thirdtrochanter iron core 21b byferromagnetic material 23b, from connectingstator core 11 here, return second yoke 92.Thus, magnetize theferromagnetic material 23b of second rotor unit at direction of principal axis.

In addition, because when above-mentioned secondary magnetizes, assembly is reversed at direction of principal axis, even so identical in the sense of current that magnetizes with flowing in thecoil 94, also can on about the opposite mutually direction of direction of principal axis, magnetize theferromagnetic material 23a of the first rotor unit and theferromagnetic material 23b of second rotor unit.

Any one of the magnetizer of first～the 8th embodiment to magnetize with coil all be that rotation axis with motor is the ring-type at center, but magnetizing of the 9th embodiment reeled around vertical radial main pole with respect to rotation axis with coil.In addition, in themagnetizer 90 of the 9th embodiment, also can be provided with simultaneously is the coil of the ring-type at center with the rotation axis as other embodiment, and connects or in parallel with the coil on being arranged on main pole.

Because magnetized electric rotating machine uses cheap magnet and exports high torque by the present invention, so for purposes as the photocopier person of one-tenth printer of OA equipment, the motor of cheap high torque (HT) can be provided, because it is big that air gap also can become, so become the actuator of low vibration, in the big contribution of industrial expectation.In addition, also expect very much application for Medical Devices, FA equipment, robot, game machine, residential equipment machine.

In addition, in each above-mentioned embodiment, the section configuration of stator core is roughly quadrangle, but can be other polygon, and for example hexagon or octagon also can be annulars.

In addition, each above-mentioned embodiment is illustrated the inner-rotor type stepping motor as object, still for the stepping motor of outer-rotor type, also can similarly magnetize with each embodiment.As the occasion that magnetizes after the outer-rotor type stepping motor assembling, with vertical end face of the rotation axis of rotor and the outer peripheral face parallel with rotation axis between form magnetic circuit.Because the permanent magnet of rotor is positioned at outer circumferential side,,, also can carry out powerful magnetization even magnetize as the laggard row of motor assembling so stator does not enter between magnetic circuit.

Claims (9)

1. the manufacture method of a HB formula permanent magnet rotating machine is characterized in that:

From the magnetic of polygon or ring-type a plurality of main poles are set radially, on each main pole of the stator core that is formed with a plurality of inductors on the tip, coiling magnet exciting coil and constitute 24 main poles, 3,3 main poles or 5 stators of 5 main poles mutually mutually mutually,

A plurality of little teeth being arranged and on the outer peripheral face in the stagger clip magnet material constitutes between two rotor cores of 1/2 tooth pitch ground configuration of little tooth the first rotor unit and be fixed on the common rotational axis of circumferencial direction with second rotor unit of this first rotor unit same structure, make that the position of little tooth of approaching rotor core is identical, and the formation rotor

First support in the outside by being configured in described the first rotor unit and be configured in second support in the outside of described second rotor unit is guaranteed with respect to described stator that the air gap ground of stipulating rotates and is assembled described rotor freely,

First magnetize and use magnetic circuit by what the peripheral part that uses yoke will comprise the part of described rotation axis of described first bracket side and described stator core in the outside of assembly linked up, make the magnetization magnetic flux connect described first support and described the first rotor unit at direction of principal axis, and with respect to the described stator core of described rotation axis near normal ground perforation, connect the axial only about half of of described assembly thus, magnetize the ferromagnetic material of described the first rotor unit at direction of principal axis

Second magnetize and use magnetic circuit by what the peripheral part that uses yoke will comprise the part of described rotation axis of described second bracket side and described stator core in the outside of assembly linked up, make the magnetization magnetic flux connect described second support and described second rotor unit at direction of principal axis, and with respect to the described stator core of described rotation axis near normal ground perforation, connect the axial remaining only about half of of described assembly thus, on direction of principal axis, magnetize the ferromagnetic material of described second rotor unit in the direction opposite with the ferromagnetic material of above-mentioned the first rotor unit.

2. the manufacture method of HB formula permanent magnet rotating machine according to claim 1, it is characterized in that: use to have described first simultaneously and magnetize, magnetize the ferromagnetic material of described the first rotor unit and the ferromagnetic material of described second rotor unit simultaneously with the magnetize magnetizer of usefulness magnetic circuit of magnetic circuit and described second.

3. the manufacture method of HB formula permanent magnet rotating machine according to claim 1, it is characterized in that: only have described first and magnetize using with a magnetize side the magnetizer of usefulness magnetic circuit of magnetic circuit and described second, after magnetizing the ferromagnetic material of described the first rotor unit, described thin dress body is taken out from described magnetizer, be arranged on once more in the described magnetizer after on direction of principal axis, making its counter-rotating, magnetize the ferromagnetic material of described second rotor unit.

4. the manufacture method of a HB formula permanent magnet rotating machine is characterized in that:

From the magnetic of polygon or ring-type a plurality of main poles are set radially, on each main pole of the stator core that is formed with a plurality of inductors on the tip, the coiling magnet exciting coil constitutes 2 phases, 4 main poles, 3 phase 3 main poles or 5 stator of 5 main poles mutually,

A plurality of little teeth are arranged on the outer peripheral face and two rotor cores of the 1/2 tooth pitch ground configuration of the little tooth that staggers in a circumferential direction between clip magnet material formation the first rotor unit and be fixed on the common rotational axis with second rotor unit of this first rotor unit same structure, make that the position of little tooth of approaching rotor core is identical, and the formation rotor

First magnetize and use magnetic circuit by what the peripheral part of rotor core that uses yoke will comprise the inboard of the part of the side of outside rotor iron core of described the first rotor unit or peripheral part and described the first rotor unit in the outside of described rotor linked up, make the magnetization magnetic flux connect the ferromagnetic material of described the first rotor unit at direction of principal axis, magnetize the ferromagnetic material of described the first rotor unit thus at direction of principal axis

Second magnetize and use magnetic circuit by what the peripheral part of rotor core that uses yoke will comprise the inboard of the part of the side of outside rotor iron core of described second rotor unit or peripheral part and described second rotor unit in the outside of rotor linked up, make the magnetization magnetic flux connect the ferromagnetic material of described second rotor unit at direction of principal axis, on direction of principal axis, magnetize the ferromagnetic material of described second rotor unit thus in the direction opposite with the ferromagnetic material of described the first rotor unit

First support in the outside by being configured in described the first rotor unit and be configured in second support in the outside of described second rotor unit guarantees that with respect to described stator the air gap ground rotation of stipulating assembles described rotor freely.

5. the manufacture method of HB formula permanent magnet rotating machine according to claim 4, it is characterized in that: use to have described first simultaneously and magnetize, magnetize the ferromagnetic material of described the first rotor unit and the ferromagnetic material of described second rotor unit simultaneously with the magnetize magnetizer of usefulness magnetic circuit of magnetic circuit and described second.

6. the manufacture method of HB formula permanent magnet rotating machine according to claim 4, it is characterized in that: only have described first and magnetize using with a magnetize side the magnetizer of usefulness magnetic circuit of magnetic circuit and described second, after magnetizing the ferromagnetic material of described the first rotor unit, change in from described magnetizer, taking out described, it is set in the described magnetizer after the direction of principal axis counter-rotating once more, magnetizes the ferromagnetic material of described second rotor unit.

7. according to the manufacture method of any one described HB formula permanent magnet rotating machine in the claim 1～6, it is characterized in that: when the described rotor of assembling, between described the first rotor unit and described second rotor unit, have electric conducting material.

8. HB formula permanent magnet rotating machine is characterized in that comprising:

From the magnetic of polygon or ring-type a plurality of main poles are set radially, on each main pole of the stator core that is formed with a plurality of inductors on the tip, 2 phases, 4 main poles that the coiling magnet exciting coil constitutes, 3 phase 3 main poles or 5 are the stator of 5 main poles mutually;

Across electric conducting material, make a plurality of little teeth are arranged on the outer peripheral face and between circumferencial direction staggers two rotor cores of 1/2 tooth pitch ground configuration of little tooth, be clamped in the permanent magnet that direction of principal axis magnetized and the first rotor unit that constitutes and have with this first rotor unit same structure and in magnetic reversal second rotor unit of permanent magnet approaching, and be fixed on the common rotational axis, make the position of little tooth of rotor core of inboard of described first, second rotor unit become identical rotor, wherein

First, second support in the outside of described rotor by being configured in described first, second rotor unit is guaranteed with respect to described stator core that the air gap ground of stipulating rotates and is supported freely.

9. HB formula permanent magnet rotating machine according to claim 8, it is characterized in that: described electric conducting material forms discoid with copper or aluminium.

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