CN200941582Y - Combined large power brush-less d.c. dynamo for electric car - Google Patents

Abstract

The utility model discloses a combined large power brushless DC motor for the electric car, comprising an enclosure (5), front and rear covers (1,9), an output shaft (7). The front and rear cover (1,9) are fixed at two ends of the enclosure (5), n pairs stator (4) and an active rotor (3) are arranged in the enclosure (5), n stators (4) are sectional fixed in the enclosure (5), the active rotor (3) is arranged on the output shaft (7) corresponding to the stator (4) through the bearing (6), single direction clutch (2) is fixed on the output shaft (7) adjacent to each active rotor (3), the single clutch (2) is connected to the active rotor (3).Low efficiency issue of motor caused by load change is completely solved with the structure; The utility model has the advantage of simple and reasonable structure, convenient operation application, suitability of different load change, high motor working efficiency, good energy saving effect etc.

Description

Used for electric vehicle combined high-power brshless DC motor

Technical field

The utility model relates to the high power DC electric machine of a kind of direct current machine, particularly a kind of adjustable power.

Background technology

As everyone knows, the efficiency curve that the direct current machine electric energy is converted to kinetic energy is to be parabolic shape, under the condition of rated power supply, when motor is exported with rated power, the electric energy of motor converts the most effective of kinetic energy to, its efficient can reach about 85%, so it is consistent with motor rated power that people select load as far as possible for use in application process; But, direct current machine in use, its load is not all identical all the time, particularly its load variations of heavy-duty motor is just bigger, and for example, power demand is 20 kilowatts during the electric automobile climbing, and when flat pavement running, perhaps only need 5 kilowatts, both differ 4 times, and in order to make electric automobile cruising under various road conditions, its direct current machine must be equipped with 20 kilowatts; Like this, electric automobile its motor conversion efficiency when flat pavement running is relatively just lower, has only 40-60%, that is to say that bigger a part of electric energy is wasted in vain; In a single day if electric automobile is selected 5 kilowatts direct current machine for use, its efficient can reach about 85% when flat pavement running, but meets upward slope, or can't climb up, or climbing speed is slow, and it is excessive to load, and efficient obviously descends, and easily burns controller.How making the different power of direct current machine output and keep higher efficient under different loading condictions is the extremely urgent difficult problem of present high power DC electric machine.For this reason, many manufacturers and knowledgeable people have carried out improvement and research repeatedly, but do not have ideal method to solve the problems referred to above so far as yet.

Summary of the invention

In order to overcome the above-mentioned disadvantage that existing high power DC electric machine exists, the utility model provide a kind of simple and reasonable, easy for operation, can adapt to different load change require, motor can both be expeditiously converts electric energy to kinetic energy, used for electric vehicle combined high-power brshless DC motor that power savings is good.

The technical scheme that its technical problem that solves the utility model adopts, it comprises housing, front and rear cover, output shaft, front and rear cover is fixed on the two ends of housing, be provided with n in the described housing to stator and movable rotor, n stator-sectional is fixed on the housing, movable rotor by bearing be arranged on the corresponding output shaft of stator on, be fixed with one-way clutch on the output shaft adjacent with each movable rotor, one-way clutch is fixedlyed connected with movable rotor; The coils from parallel connection of coils of each stator connects, and is provided with the power supply Closing Switch separately.

After adopting said structure, the utility model is formed a high-power brushless direct current machine by n to stator and rotor, forms a high-power brushless direct current machine by the brushless direct-current small machine of n group coenosarc in other words; During use, according to the motor actual load, open 1 to n mains switch, the movable rotor rotation of energized small machine, single power or make a concerted effort to drive the output shaft rotation is because the one-way clutch effect, the movable rotor of not opening small machine separates automatically with output shaft, therefore open and not disturbing mutually of not opening, motor is worked in the scope near rated power all the time like this, that is to say that motor is in efficient running status all the time; Its advantage one is to compare the 20-30% that can economize on electricity with the equal-wattage motor; The 2nd, coefficient of safety improves, just in case motor breaks down, also can only be wherein one group, does not influence the operation of whole other group of motor, and motor can also work on; The 3rd, controller is easy to make, and prolong useful life; The 4th, the permanent magnet of movable rotor is easy to make, and quality can improve greatly, because big more its quality of permanent magnet density is good more, identical device is made little its density of permanent magnet will be higher than big permanent magnet; Have simple and reasonable, easy for operation, can adapt to different load and change advantages such as requirement, motor working efficiency height, power savings are good.

Description of drawings

Fig. 1 is the utility model structural representation.

Embodiment

Shown in Figure 1, specific embodiments for the utility model used for electric vehicle combined high-power brshless DC motor, it compriseshousing 5, front andrear cover 1,9, output shaft 7, front andrear cover 1,9 are fixed on the two ends ofhousing 5, rotating shaft 7 is arranged on front and rear cover 1 bybearing 8, on 9, be provided with four pairs ofstators 4 andmovable rotor 3 in the describedhousing 5, fourstator 4 segmentations are fixed in thehousing 5, fourmovable rotors 3 bybearing 6 be arranged on four stators, 4 corresponding output shafts 7 on, be fixed with one-way clutch 2 on the output shaft 7 adjacent with eachmovable rotor 3, one-way clutch 2 is fixedlyed connected withmovable rotor 3, the coils from parallel connection of coils of eachstator 4 connects, and is provided with the power supply Closing Switch separately.

The utility model course of work is as follows, when in the rated power scope of load at one group of small machine, can openmovable rotor 3 job,movable rotor 3 drives output shaft 7 rotation outputting powers by the one-way clutch 2 that is mated, other threemovable rotors 3 are not opened the not rotary work of switching on, in the effect of one-way clutch 2, output shaft 7 separates automatically with other three movable rotors 3.When load increases to the rated power of two groups of small machines, except 3 work of above-mentioned movable rotor, openmovable rotor 3 energising job again, thisactivity rotor 3 is under the effect of one-way clutch 2, drive output shaft 7 rotation outputting powers with above-mentionedmovable rotor 3, other twomovable rotors 3 not rotary work of not switching on, in the effect of one-way clutch 2, output shaft 7 separates automatically with two idle movable rotors 3.When load increases to the rated power of three groups of small machines, except that above-mentioned two work activities rotors, 3 work, restart the 3rdmovable rotor 3 energising work, thisactivity rotor 3 is under the effect of one-way clutch 2,movable rotor 3 with above-mentioned work drives output shaft 7 rotation outputting powers, idlemovable rotor 3 is in the effect of one-way clutch 2, and output shaft 7 separates automatically with idle movable rotor 3.When load increases to the rated power of four groups of small machines, restart the 4thmovable rotor 3 energising work, thisactivity rotor 3 drives output shaft 7 rotation outputting powers with threemovable rotors 3 of above-mentioned work under the effect of one-way clutch 2.Like this, the utility model just can be opened the number of elements ofwork activities rotor 3 according to actual load, makes motor be in best nominal operation state all the time and improves electric efficiency.When load alleviated, according to the situation of load weight, the work of therotor 3 of can stopping action one by one moved motor all the time in the scope of rated power, guarantee the operating efficiency of motor.

Claims (1)

1, a kind of used for electric vehicle combined high-power brshless DC motor, comprise housing (5), front and rear cover (1,9), output shaft (7), front and rear cover (1,9) be fixed on the two ends of housing (5), it is characterized in that: be provided with n in the described housing (5) stator (4) and movable rotor (3), n stator (4) segmentation is fixed in the housing (5), movable rotor (3) be arranged on by bearing (6) and the corresponding output shaft of stator (4) (7) on, be fixed with one-way clutch (2) on the output shaft (7) adjacent with each movable rotor (3), one-way clutch (2) is fixedlyed connected with movable rotor (3).

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