MULTI-LEVEL QUASI-RESONANT POWER INVERTER

摘要

A power inverter includes a multi-level switching circuit for switching between any two voltage levels selected from a set of N voltage levels. The switching circuit includes at least N+1 switching elements. Each switching element has a corresponding resonant capacitor connected parallel to it. As the switching elements turn on and off, different ones of the resonant capacitors cooperate with a resonant inductor connected to a pole of the switching circuit and with an output capacitor in maintaining a resonance condition as seen from the active switching elements.