A 3-LEVEL AUXILIARY RESONANT COMMUTATED POLE INVERTER WITH ZERO-VOLTAGE SWITCHING

摘要

The present invention relates to a zero voltage switching three-level auxiliary resonant pole inverter, comprising two bidirectional switches and one resonant inductor, wherein the resonant inductor and the auxiliary elements are connected in parallel to the inverter pole, and the auxiliary circuit is configured. Each bidirectional switch in the circuit is connected to the neutral point of the inverter pole, and three resonant capacitors are connected between the address terminal and the output terminal and the neutral point of the input capacitor to limit the voltage rise rate of the main element. It is configured to take advantage of the level-assisted resonant pole inverter and the three-level inverter. The effective value rating of the resonant inductor current may be small, and a small effective value rating auxiliary device is sufficient to turn off the main device. In addition, two switching elements can be operated in series without voltage unbalance, resulting in high voltage, high capacity, and low harmonics on the output side.As a result of the operation of the auxiliary circuit, the juice switching element can obtain zero voltage switching without increasing voltage and current stress. The present invention relates to a zero-voltage switching three-level auxiliary resonant pole inverter.