Simplified main topology circuit of series resonant inverter with resonant pole capacitor buffer

Commutation process of series resonant inverter containing resonant pole capacitor: Conventional RCVD snubber circuit uses resistor to discharge. As the switching frequency increases, the energy consumed in the snubber also increases, which greatly reduces the cost of the entire inverter. System efficiency. Directly connecting a lossless buffer capacitor in parallel between the IGBT collector and emitter can effectively reduce the turn-off loss of the switching device and feed back the energy lost by the resistor in the conventional buffer to the load or power supply, which is more suitable for high-voltage applications. frequency inverter.