CN201805357U - Power supply device capable of using single-phase alternating current power supply to generate three-phase alternating current power supply - Google Patents

Abstract

The utility model belongs to the technical field of power supply devices, and relates to a power supply device capable of using a single-phase alternating current power supply to generate a three-phase alternating current power supply, and solving the problem of unreasonable design and the like in the prior art. The power supply device comprises an AC-DC (alternating current-direct current) convertor circuit that is connected on the single-phase alternating current power supply and can convert the single-phase alternating current power supply into direct current, wherein the AC-DC convertor circuit is connected with a three-phase alternating current power supply generating circuit capable of converting direct current into three-phase alternating current; and the three-phase alternating current power supply generating circuit is connected with three-phase alternating current electric equipment. The advantages of the power supply device are as follows: 1. mains supply can be directly converted into power supply used by the three-phase alternating current electric equipment, so that the technical difficulties that the noise and vibration in the prior art can not be overcome can be solved; 2. the circuit is controlled by a single chip computer generates different frequencies and working currents, therefore, stable soft start is realized and the energy resources can be saved effectively; and 3. the working state of the power supply device can be detected in real time so as to play roles in protecting and monitoring the equipment, and the operation is very convenient.

Description

Produce the electric supply installation of three-phase alternating-current supply by single phase alternating current power supply

Technical field

The utility model belongs to the electric supply installation technical field, especially relates to a kind of electric supply installation that is produced three-phase alternating-current supply by single phase alternating current power supply.

Background technology

The equipment such as light-duty lathe of existing single phase alternating current power supply power supply all adopt monopole asynchronous motor as power source.Single phase alternating current (A.C.) asynchronous machine principle is: have the electromagnetic torque that the electric current [phase difference is 90 degree usually] that feeds out of phase in two groups of windings of space out of phase produced and make rotor rotation on stator.Therefore, on principle, will produce the asymmetric dynamic noise that causes of mechanical asymmetric and electromagnetism and the vibration that can't overcome.Noise when particularly equipment such as lathe runs up is bigger; And during equipment low-speed runnings such as lathe because the dynamic unbalance of motor also can cause bigger vibration so that can not reach of the requirement of equipment such as light-duty lathe to noise and vibration standard.And employing three-phase alternating-current supply power supply ac three-phase asynchronous motor is as the light-duty lathe of power source, because the stator of ac three-phase asynchronous motor is made up of three groups of symmetric windings, three changes of magnetic field positions are 120 degree, so electromagnetic torque is even, dynamic property is fine, and high speed noise during work and low speed vibration are all significantly low.But ac three-phase asynchronous motor need be powered with three-phase alternating current, and this can't use the light-duty lathe that has only the single-phase alternating current power supply.

For this reason, people have carried out long-term exploration, have proposed various solutions.For example, Chinese patent literature discloses a kind of inverter [application number: CN200720188129.5], its generator output three-phase electricity is given the rectifier bridge rectification, output dc voltage is given inverter circuit, the output inversion electricity of this inverter circuit is given filter circuit, filter circuit sine wave output voltage is characterized in that: the output of rectifier bridge connects dc voltage detector, and dc voltage detector is to PIC microcomputer controller MCU output testing result; This MCU also is connected with output voltage detector; Two output PA, the PB of described PIC microcomputer controller MCU are connected with the input of optocoupler driver, and the optocoupler output end of driver connects the control end of inverter circuit.Its beneficial effect is: reduced the aberration rate of generator output waveform, improved power quality; Under the situation that does not change hardware, can make corresponding output frequency and voltage adjustment according to the power utilization environment requirement of country variant or regional voltage and frequency.

Such scheme has been realized the conversion of power supply to a certain extent, but complicated integral structure, and the equipment cost height can't directly utilize civil power to change, and is difficult to realize the soft start of power consumption equipment.

Summary of the invention

The purpose of this utility model is at the problems referred to above, provides a kind of reasonable in design, simple in structure, and electromagnetic torque is even, the electric supply installation by single phase alternating current power supply generation three-phase alternating-current supply that dynamic property is good.

For achieving the above object, the utility model has adopted following technical proposal: this is produced the electric supply installation of three-phase alternating-current supply by single phase alternating current power supply, be connected between single phase alternating current power supply and the three-phase alternating current power consumption equipment, it is characterized in that, this electric supply installation comprises and is connected on the single phase alternating current power supply and single phase alternating current power supply can be converted to the straight convertor circuit of galvanic friendship, be connected with the three-phase alternating-current supply that direct current can be converted to three-phase alternating current and produce circuit on the straight convertor circuit of friendship, described three-phase alternating-current supply produces circuit and is connected with the three-phase alternating current power consumption equipment.

Above-mentioned being produced in the electric supply installation of three-phase alternating-current supply by single phase alternating current power supply, described three-phase alternating current power consumption equipment and three-phase alternating-current supply produce between the circuit and are provided with the single chip machine controlling circuit that is used to regulate single-phase alternating current frequency and size of current.

Above-mentioned producing in the electric supply installation of three-phase alternating-current supply by single phase alternating current power supply, described three-phase alternating current power consumption equipment is a three-phase AC asynchronous motor, and U, V that three-phase alternating-current supply produces circuit are connected with the Z terminals with X, the Y of three-phase alternating current power consumption equipment respectively with the W output, and the center line O end that described three-phase alternating-current supply produces circuit is connected with the ground terminal N of three-phase alternating current power consumption equipment.

Above-mentioned producing in the electric supply installation of three-phase alternating-current supply, be connected with governor motion on the described single chip machine controlling circuit by single phase alternating current power supply.

Above-mentioned being produced in the electric supply installation of three-phase alternating-current supply by single phase alternating current power supply, the voltage of described single phase alternating current power supply is 220V, and the voltage that described three-phase alternating-current supply produces the three-phase alternating current of circuit generation is 380V.

Compared with prior art, this is by the advantage that single phase alternating current power supply produces the electric supply installation of three-phase alternating-current supply: 1, reasonable in design, simple in structure, can directly civil power be converted to the power supply that uses for the three-phase alternating current power consumption equipment, the noise that can't overcome that exists in the solution prior art and the technical barrier of vibration.2, produce different frequency and operating current by single chip machine controlling circuit, thereby realize soft start stably, and effective energy savings.3, can detect in real time operating state, play equipment protection and monitoring effect, and it is very convenient to operate.

Description of drawings

Fig. 1 is the structural representation that the utility model provides.

Among the figure, single phase alternating current power supply 1, three-phase alternating current power consumption equipment 2, the straight convertor circuit 3 of friendship, three-phase alternating-current supply produce circuit 4, single chip machine controlling circuit 5, plant equipment 6.

Embodiment

As shown in Figure 1, this is connected between single phase alternating current power supply 1 and the three-phase alternating current power consumption equipment 2 by the electric supply installation of single phase alternating current power supply generation three-phase alternating-current supply.The voltage of the single phase alternating current power supply 1 in the present embodiment is 220V, and three-phase alternating current power consumption equipment 2 is the three-phase alternating-current motor of light-duty lathe.The three-phase alternating current power consumption equipment 2 here is connected on the plant equipment 6.

This electric supply installation comprises and is connected on the single phase alternating current power supply 1 and single phase alternating current power supply 1 can be converted to the straight convertor circuit 3 of galvanic friendship, is connected with the three-phase alternating-current supply that direct current can be converted to three-phase alternating current on the straight convertor circuit 3 and produces circuit 4 handing over.The voltage that three-phase alternating-current supply produces the three-phase alternating current of circuit 4 generations is 380V.Three-phase alternating-current supply produces circuit 4 and is connected with three-phase alternating current power consumption equipment 2.Three-phase alternating current power consumption equipment 2 and three-phase alternating-current supply produce between the circuit 4 and are provided with the single chip machine controlling circuit 5 that is used to regulate single-phase alternating current frequency and size of current.Be connected with governor motion on the single chip machine controlling circuit 5.

Three-phase alternating current power consumption equipment 2 is a three-phase AC asynchronous motor, and U, the V of three-phase alternating-current supply generation circuit 4 are connected with the Z terminals with X, the Y of three-phase alternating current power consumption equipment 2 respectively with the W output.The center line O end that three-phase alternating-current supply produces circuit 4 is connected with the ground terminal N of three-phase alternating current power consumption equipment 2.

Present embodiment can directly convert civil power to the power supply that uses for the three-phase alternating current power consumption equipment, the noise that can't overcome that exists in the solution prior art and the technical barrier of vibration.Produce different frequency and operating current by single chip machine controlling circuit 5, thereby realize soft start stably, and effective energy savings.Can detect in real time operating state, play equipment protection and monitoring effect, and it is very convenient to operate.

Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.

Although this paper has used single phase alternating current power supply 1, three-phase alternating current power consumption equipment 2, the straight convertor circuit 3 of friendship, three-phase alternating-current supply to produce terms such as circuit 4, single chip machine controlling circuit 5, plant equipment 6 morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present utility model more easily; They are construed to any additional restriction all is contrary with the utility model spirit.

Claims (5)

1. electric supply installation that produces three-phase alternating-current supply by single phase alternating current power supply, be connected between single phase alternating current power supply (1) and the three-phase alternating current power consumption equipment (2), it is characterized in that, this electric supply installation comprises that being connected single phase alternating current power supply (1) goes up and single phase alternating current power supply (1) can be converted to the straight convertor circuit of galvanic friendship (3), be connected with the three-phase alternating-current supply that direct current can be converted to three-phase alternating current and produce circuit (4) on the straight convertor circuit of friendship (3), described three-phase alternating-current supply produces circuit (4) and is connected with three-phase alternating current power consumption equipment (2).

2. the electric supply installation that produces three-phase alternating-current supply by single phase alternating current power supply according to claim 1, it is characterized in that described three-phase alternating current power consumption equipment (2) and three-phase alternating-current supply produce between the circuit (4) and be provided with the single chip machine controlling circuit (5) that is used to regulate single-phase alternating current frequency and size of current.

3. the electric supply installation that produces three-phase alternating-current supply by single phase alternating current power supply according to claim 2, it is characterized in that, described three-phase alternating current power consumption equipment (2) is a three-phase AC asynchronous motor, and U, V that three-phase alternating-current supply produces circuit (4) are connected with the Z terminals with X, the Y of three-phase alternating current power consumption equipment (2) respectively with the W output, and the center line O end that described three-phase alternating-current supply produces circuit (4) is connected with the ground terminal N of three-phase alternating current power consumption equipment (2).

4. according to claim 2 or 3 described electric supply installations, it is characterized in that described single chip machine controlling circuit is connected with governor motion on (5) by single phase alternating current power supply generation three-phase alternating-current supply.

5. according to claim 1 or the 2 or 3 described electric supply installations that produce three-phase alternating-current supply by single phase alternating current power supply, it is characterized in that, the voltage of described single phase alternating current power supply (1) is 220V, and the voltage that described three-phase alternating-current supply produces the three-phase alternating current of circuit (4) generation is 380V.

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