Switched reluctance motor dual-PWM power converter

Abstract

The invention discloses a switched reluctance motor dual-PWM power converter comprising an IGBT rectifier, a rectifier control unit, an inverter, and an inverter control unit. The input end of the IGBT rectifier is externally connected with AC power. The output end of the IGBT rectifier is connected with the input end of the inverter. The output end of the inverter is externally connected with a switched reluctance motor winding. The rectifier control unit outputs a control pulse to the IGBT rectifier by use of a voltage-oriented vector control strategy. The inverter control unit outputs a control pulse to the inverter by use of a current chopping control strategy. According to the invention, the voltage-oriented vector control strategy is used at the rectifier side, the current chopping control strategy is used at the inverter side, the rectifier and the inverter constitute a dual-PWM switched reluctance motor power converter, two-way power flow is realized, and no harmonic pollution is caused to the grid. Therefore, the switched reluctance motor dual-PWM power converter is a green, environment-friendly and efficient power electronic device in the real sense.

Description

technical field [0001] The invention relates to a power converter, in particular to a dual-PWM power converter for a switched reluctance motor. Background technique [0002] The switched reluctance motor speed control system has the advantages of high efficiency and high performance. At present, the front-end rectification of the switched reluctance motor power converter is realized by uncontrollable diode rectification. Not only the system power factor is low, but also the harmonics of the input current Larger, the DC bus voltage is not enough. In addition, due to the unidirectional conductivity of the diode, the traditional power converter cannot realize the bidirectional flow of energy. When the motor is in the braking operation state, it is necessary to configure a bulky braking resistor to consume the electric energy generated by the motor, resulting in the switching magnetic The overall system efficiency of the resistance motor is low and the energy consumption is ser...

AI Technical Summary

Problems solved by technology

[0002] The switched reluctance motor speed control system has the advantages of high efficiency and high performance. At present, the front-end rectification of the switched reluctance motor power converter is realized by uncontrollable diode rectification. Not only the system power factor is low, but also the harmonics of the input current Larger, the DC bus voltage is not enough

In addition, due to the unidirectional conductivity of the diode, the traditional power converter cannot realize the bidirectional flow of energy. When the motor is in the braking operation state, it is necessary to configure a bulky braking resistor to consume the electric energy generated by the motor, resulting in the switching magnetic The overall system efficiency of the resistance motor is low and the energy consumption is serious, so the traditional power converter limits the high performance advantages of the switched reluctance motor

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