3-level inverter apparatus

摘要

A 3-level inverter includes a plurality of power semiconductor switching elements respectively connected in serial relation, a diode connected in reverse parallel relation with each of the plurality of power semiconductor switching element, and a plurality of snubber circuits for protecting the plurality of power semiconductor switching elements. The number of the snubber circuits is smaller by one as compared with the number of the power semiconductor switching circuits, and one of the snubber circuits is connected with a DC neutral point and AC output terminal. The one of the snubber circuits which is connected with the DC neutral point and the AC output terminal is a circuit including a capacitor connected in serial relation with a resistor.