【摘要】 提出了一种驱动大功率交流电机的极谐振零电压过渡脉宽调制（ＲＰ　ＺＶＴ－ＰＷＭ）逆变器的改 进电路，并对该电路的ＺＶＴ工作过程进行了详细的理论分析。在该电路中，通过辅助开关的控制，使 得谐振只发生在主开关状态过渡的瞬间，谐振电容既作为主开关关断时的吸收电容，又在主开关开 通时和谐振电感构成谐振回路，为其提供一个ＺＶＴ条件。仿真分析和实验结果验证了逆变桥上主开 关的ＺＶＴ工作过程及本文所提电路的正确性和可行性。更多还原

【Abstract】 An improved circuit of RP ZVT-PWM inverter for motor drive is proposed. In this circuit, by controlling the auxiliary switches, the resonant operation appears only during the main switching transition periods. The resonant capacitors work as snubber capacitors when main switches turned off and as resonant capacitors when main switches turned on, and provide a zero-voltage transition (ZVT) for it. Simulation and experimental results verified the ZVT operation of the main switches and correctness of the proposed circuit.更多还原