阅读说明：本技术 一种三相逆变电路 (A kind of three-phase inverting circuit ) 是由 张惠桃 于 2019-09-30 设计创作，主要内容包括：本发明公开了一种三相逆变电路,包括电源模块、PWM控制模块以及逆变模块,所述逆变模块包括驱动单元以及六个桥臂单元；所述桥臂单元包括驱动输入端、参考地输入端以及开关管M1,所述驱动输入端与开关管M1的栅极相连,所述参考地输入端与开关管M1的源极相连,所述驱动输入端以及参考地输入端分别与驱动单元的输出端相连。本发明通过在各个桥臂单元中设置驱动输入端以及参考地输入端,便于驱动单元直接向桥臂单元的驱动输入端以及参考地输入端输入用于控制开关管M1导通与截止的驱动信号,由于驱动单元能够对开关管M1的栅极以及源极的电位直接控制,有效简化逆变电路的电路结构。(The invention discloses a kind of three-phase inverting circuit, including power module, PWM control module and inverter module, the inverter module includes driving unit and six bridge arm units；The bridge arm unit includes driving input terminal, with reference to ground input terminal and switching tube M1, the driving input terminal is connected with the grid of switching tube M1, described to be connected with reference to ground input terminal with the source electrode of switching tube M1, the driving input terminal and reference ground input terminal are connected with the output end of driving unit respectively.The present invention in each bridge arm unit by being arranged driving input terminal and with reference to ground input terminal, the driving signal that control switch pipe M1 is connected with ends directly is used for the driving input terminal of bridge arm unit and with reference to ground input terminal input convenient for driving unit, due to driving unit can the grid of switch tube M1 and the current potential of source electrode directly control, effectively simplify the circuit structure of inverter circuit.)

1. a kind of three-phase inverting circuit, which is characterized in that including power module, PWM control module and inverter module, the electricity Source module is electrically connected with each circuit module respectively, and the PWM control module is connected with inverter module；

The inverter module includes driving unit and six bridge arm units, and six switch units are respectively bridge arm on first Unit, bridge arm unit on second, bridge under bridge arm unit, the first lower bridge arm unit, the second lower bridge arm unit and third in third Arm unit, bridge arm unit is connected with the first lower bridge arm unit on described first, bridge arm unit and the second lower bridge arm on described second Unit is connected, and bridge arm unit is connected with third lower bridge arm unit in the third, and the input terminal and PWM of the driving unit control The output end of module is connected, and the output end of the driving unit is connected with each bridge arm unit respectively；

The bridge arm unit includes driving input terminal, with reference to ground input terminal and switching tube M1, the driving input terminal with switch The grid of pipe M1 is connected, described to be connected with reference to ground input terminal with the source electrode of switching tube M1, the driving input terminal and reference ground Input terminal is connected with the output end of driving unit respectively.

2. a kind of three-phase inverting circuit according to claim 1, it is characterised in that: the bridge arm unit further includes resistance R1, resistance R2, resistance R3, voltage-stabiliser tube D1 and diode D2, the driving input terminal pass through the grid of resistance R2 and switching tube M1 Extremely it is connected, the both ends of the resistance R1 are connected with the grid of switching tube M1 and with reference to ground input terminal respectively, the voltage-stabiliser tube D1 Anode with reference to input terminal be connected, the cathode of the voltage-stabiliser tube D1 is connected with the grid of switching tube M1, the resistance R3's One end is connected with the grid of switching tube M1, and the other end of the resistance R3 is connected with the anode of diode D2, the diode D2 Cathode with driving input terminal be connected.

3. a kind of three-phase inverting circuit according to claim 2, it is characterised in that: the driving unit includes model The driving chip and its peripheral circuit of IR2130, the input terminal of the driving chip respectively with the output end phase of PWM control module Even, the output end of the driving chip is connected with the driving input terminal of each bridge arm unit and with reference to ground input terminal respectively.

4. a kind of three-phase inverting circuit according to claim 1, it is characterised in that: it further include multiple isolation modules, it is described The output end of PWM control module is connected with the input terminal of each isolation module respectively, the output end point of each isolation module It is not connected with the input terminal of driving unit.

5. a kind of three-phase inverting circuit according to claim 4, it is characterised in that: the isolation module includes model The photoelectrical coupler and its peripheral circuit of TLP250, the input terminal phase of the output end and photoelectrical coupler of the PWM control module Even, the output end of the photoelectrical coupler is connected with the input terminal of driving unit.

6. a kind of three-phase inverting circuit according to claim 1, it is characterised in that: it further include communication module, the communication Module includes RS232 communication unit and CAN communication unit, the PWM control module respectively with RS232 communication unit and CAN communication unit is connected.

7. a kind of three-phase inverting circuit according to claim 1, it is characterised in that: the PWM control module includes model Control chip and its peripheral circuit for the DSP of TMS320F28335, the output end of the DSP control chip and driving unit it is defeated Enter end to be connected.

Technical field

The present invention relates to electronic circuit technology fields, more specifically to a kind of three-phase inverting circuit structure.

Background technique

In daily life, people are frequently utilized that DC power supply to drive three-phase motor, it is therefore desirable to utilize three-phase inversion electricity Road, which is realized, is converted into three-phase alternating current for the direct current that DC power supply exports, specifically using intelligent chip according to the program of setting Six road pwm signals are exported into each switching tube, finally realize that the direct current by DC power supply output is converted into three-phase alternating current.

Those skilled in the art are clear, and the essence of intelligent chip control switch pipe on and off is switch tube grid The process that capacitor between source electrode is charged and discharged.And the switching tube in inverter circuit positioned at upper bridge arm is in suspension State, it is therefore desirable to special design be carried out to the driving circuit of the switching tube of upper bridge arm, the circuit for increasing inverter circuit is complicated Degree.

Summary of the invention

The technical problem to be solved by the present invention is providing a kind of simple three-phase inverting circuit structure of structure.

The solution that the present invention solves its technical problem is:

A kind of three-phase inverting circuit, including power module, PWM control module and inverter module, the power module point It is not electrically connected with each circuit module, the PWM control module is connected with inverter module；

The inverter module includes driving unit and six bridge arm units, and six switch units are respectively on first Bridge arm unit, bridge arm unit on second, bridge arm unit, the first lower bridge arm unit, the second lower bridge arm unit and third in third Lower bridge arm unit, bridge arm unit is connected with the first lower bridge arm unit on described first, on described second under bridge arm unit and second Bridge arm unit is connected, and bridge arm unit is connected with third lower bridge arm unit in the third, the input terminal and PWM of the driving unit The output end of control module is connected, and the output end of the driving unit is connected with each bridge arm unit respectively；

The bridge arm unit includes driving input terminal, with reference to ground input terminal and switching tube M1, the driving input terminal and The grid of switching tube M1 is connected, described to be connected with reference to ground input terminal with the source electrode of switching tube M1, the driving input terminal and ginseng Ground input terminal is examined to be connected with the output end of driving unit respectively.

As a further improvement of the above technical scheme, the bridge arm unit further include resistance R1, resistance R2, resistance R3, Voltage-stabiliser tube D1 and diode D2, the driving input terminal are connected by resistance R2 with the grid of switching tube M1, the resistance R1 Both ends respectively with the grid of switching tube M1 and with reference to ground input terminal be connected, the voltage-stabiliser tube D1 anode with reference to ground input End is connected, and the cathode of the voltage-stabiliser tube D1 is connected with the grid of switching tube M1, one end of the resistance R3 and the grid of switching tube M1 Extremely it is connected, the other end of the resistance R3 is connected with the anode of diode D2, the cathode and driving input terminal of the diode D2 It is connected.

As a further improvement of the above technical scheme, the driving unit include model IR2130 driving chip and Its peripheral circuit, the input terminal of the driving chip are connected with the output end of PWM control module respectively, the driving chip it is defeated Outlet is connected with the driving input terminal of each bridge arm unit and with reference to ground input terminal respectively.

As a further improvement of the above technical scheme, the three-phase inverting circuit further includes multiple isolation modules, described The output end of PWM control module is connected with the input terminal of each isolation module respectively, the output end point of each isolation module It is not connected with the input terminal of driving unit.

As a further improvement of the above technical scheme, the isolation module includes the photoelectrical coupler of model TLP250 And its peripheral circuit, the output end of the PWM control module are connected with the input terminal of photoelectrical coupler, the photoelectrical coupler Output end is connected with the input terminal of driving unit.

As a further improvement of the above technical scheme, the three-phase inverting circuit further includes communication module, the communication Module includes RS232 communication unit and CAN communication unit, the PWM control module respectively with RS232 communication unit and CAN communication unit is connected.

As a further improvement of the above technical scheme, the PWM control module includes model TMS320F28335 DSP controls chip and its peripheral circuit, and the output end of the DSP control chip is connected with the input terminal of driving unit.

The beneficial effects of the present invention are: the present invention in each bridge arm unit by being arranged driving input terminal and with reference to ground Input terminal is directly used for control switch to the driving input terminal of bridge arm unit and with reference to ground input terminal input convenient for driving unit The driving signal of pipe M1 conducting and cut-off, the current potential of the grid and source electrode of being capable of switch tube M1 due to driving unit are directly controlled System effectively simplifies the circuit structure of inverter circuit.

Detailed description of the invention

To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly described.Obviously, described attached drawing is a part of the embodiments of the present invention, rather than is all implemented Example, those skilled in the art without creative efforts, can also be obtained according to these attached drawings other designs Scheme and attached drawing.

Fig. 1 is circuit module frame figure of the invention；

Fig. 2 is the circuit diagram of bridge arm unit of the invention；

Fig. 3 is the circuit diagram of driving unit of the invention；

Fig. 4 is the circuit diagram of isolation module of the invention；

Fig. 5 is the circuit diagram of PWM control module of the invention.

Specific embodiment

It is carried out below with reference to technical effect of the embodiment and attached drawing to design of the invention, specific structure and generation clear Chu, complete description, to be completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is this Shen A part of the embodiment please, rather than whole embodiments, are based on embodiments herein, and those skilled in the art is not paying Other embodiments obtained under the premise of creative work belong to the range of the application protection.In addition, be previously mentioned in text All connection relationships not singly refer to that component directly connects, and referring to can be according to specific implementation situation, by adding or reducing connection Auxiliary, Lai Zucheng more preferably connection structure.Each technical characteristic in the invention, under the premise of not conflicting conflict It can be with combination of interactions.Finally, it should be noted that such as term in text " center, upper and lower, left and right, vertical, horizontal, inside and outside " The orientation or positional relationship of instruction is then to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description this technology side Case and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation Construction and operation, therefore should not be understood as the limitation to the application.

Referring to Fig.1~Fig. 5, this application discloses a kind of three-phase inverting circuit, first embodiment include power module, PWM control module and inverter module, the power module are electrically connected with each circuit module respectively, and the PWM controls mould Block is connected with inverter module；

The inverter module includes driving unit and six bridge arm units, and six bridge arm units are respectively on first Bridge arm unit, bridge arm unit on second, bridge arm unit, the first lower bridge arm unit, the second lower bridge arm unit and third in third Lower bridge arm unit, bridge arm unit is connected with the first lower bridge arm unit on described first, on described second under bridge arm unit and second Bridge arm unit is connected, and bridge arm unit is connected with third lower bridge arm unit in the third, the input terminal and PWM of the driving unit The output end of control module is connected, and the output end of the driving unit is connected with each bridge arm unit respectively；

The bridge arm unit includes driving input terminal, with reference to ground input terminal and switching tube M1, the driving input terminal and The grid of switching tube M1 is connected, described to be connected with reference to ground input terminal with the source electrode of switching tube M1, the driving input terminal and ginseng Ground input terminal is examined to be connected with the output end of driving unit respectively.

Specifically, by the way that driving input terminal and reference ground input terminal are arranged in each bridge arm unit in the present embodiment, It is directly led to the driving input terminal of bridge arm unit and with reference to ground input terminal input for control switch pipe M1 convenient for driving unit The logical driving signal with cut-off, due to driving unit can the grid of switch tube M1 and the current potential of source electrode directly control, have Imitate the circuit structure for simplifying inverter circuit.

Be further used as preferred embodiment, in the present embodiment, the bridge arm unit further include resistance R1, resistance R2, Resistance R3, voltage-stabiliser tube D1 and diode D2, the driving input terminal is connected by resistance R2 with the grid of switching tube M1, described The both ends of resistance R1 are connected with the grid of switching tube M1 and with reference to ground input terminal respectively, anode and the reference of the voltage-stabiliser tube D1 Ground input terminal is connected, and the cathode of the voltage-stabiliser tube D1 is connected with the grid of switching tube M1, one end of the resistance R3 and switching tube The grid of M1 is connected, and the other end of the resistance R3 is connected with the anode of diode D2, the cathode of the diode D2 and driving Input terminal is connected.Wherein open resistance of the resistance R2 as switching tube M1, shutdown resistance of the resistance R3 as switching tube M1, usually It chooses open resistance to mislead greater than shutdown resistance to avoid switching tube M1 caused by the Miller effect, the voltage-stabiliser tube D1 is for preventing Only driving voltage is excessively high between switching tube M1 grid and source electrode, and the resistance R1 avoids switching tube caused by the interference of plus high-pressure M1 false triggering.

It is further used as preferred embodiment, in the present embodiment, the driving unit includes the drive of model IR2130 Dynamic chip and its peripheral circuit, the input terminal of the driving chip are connected with the output end of PWM control module respectively, the driving The output end of chip is connected with the driving input terminal of each bridge arm unit and with reference to ground input terminal respectively.

It is further used as preferred embodiment, in the present embodiment, the three-phase inverting circuit further includes multiple isolation modes The output end of block, the PWM control module is connected with the input terminal of each isolation module respectively, each isolation module it is defeated Outlet is connected with the input terminal of driving unit respectively.The present embodiment realizes control side and power side by the setting of isolation module Electrical isolation ensures the safety of inverter circuit.

It is further used as preferred embodiment, in the present embodiment, the isolation module includes the light of model TLP250 The output end of electric coupler and its peripheral circuit, the PWM control module is connected with the input terminal of photoelectrical coupler, the photoelectricity The output end of coupler is connected with the input terminal of driving unit.

It is further used as preferred embodiment, in the present embodiment, the three-phase inverting circuit further includes communication module, institute Stating communication module includes RS232 communication unit and CAN communication unit, the PWM control module respectively with RS232 communication unit And CAN communication unit is connected.Specifically, RS232 communication unit described in the present embodiment includes the electricity of model SP3232E Flat conversion chip and its peripheral circuit, the CAN communication unit include bus transceiving chip and its periphery of model TJA1040 Circuit.

It is further used as preferred embodiment, in the present embodiment, the PWM control module includes model The DSP control chip and its peripheral circuit of TMS320F28335, the input of the output end and driving unit of the DSP control chip End is connected.

The better embodiment of the application is illustrated above, but the application is not limited to the specific embodiments, Those skilled in the art can also make various equivalent modifications or replacement on the premise of without prejudice to spirit of the invention, this Equivalent variation or replacement are all included in the scope defined by the claims of the present application a bit.