Patent ID: 9001544
Filing Date: 2015-04-07
Classification: H02M

Abstract:
1. An inverter device comprising: a first three-level circuit including first, second, third and fourth preceding-stage switch elements connected in series between a first input end of a direct-current power supply and a neutral point and a first charging and discharging capacitor including a first end that is connected to a connection point between the first preceding-stage switch element and the second preceding-stage switch element and a second end that is connected to a connection point between the third preceding-stage switch element and the fourth preceding-stage switch element; a second three-level circuit including fifth, sixth, seventh, and eighth preceding-stage switch elements connected in series between a neutral point and a second input end of the direct-current power supply and a second charging and discharging capacitor including a first end that is connected to a connection point between the fifth preceding-stage switch element and the sixth preceding-stage switch element and a second end that is connected to a connection point between the seventh preceding-stage switch element and the eighth preceding-stage switch; a bridge clamping circuit including first, second, third and fourth subsequent-stage switch elements bridge-connected to first, second, third and fourth terminals wherein a first end is connected to a connection point between the second preceding-stage switch element and the third preceding-stage switch element and a second end is connected to a connection point between the sixth preceding-stage switch element and the seventh preceding-stage switch element; a first inductor connected between a first output end and a connection point between the first subsequent-stage switch element and the second subsequent-stage switch element in the bridge clamping circuit; and a second inductor configured connected between a second output end and a connection point between the third subsequent-stage switch element and the fourth subsequent-stage switch element in the bridge clamping circuit.