Patent ID: 9531298
Filing Date: 2016-12-27
CPC Classification: H02M

Claim Text:
1. An inverter device, comprising: first and second switching elements, each of which is connected to a diode in anti-parallel, the first and second switching elements connected in series across a direct current power source; and a bidirectional switch, configured by connecting a first switch element and a second switch element in anti-series or anti-parallel, an end of the bidirectional switch connected to a connection point of the first and second switching elements, and an other end connected to an intermediate potential point of the direct current power source, wherein when in an operation mode in which a predetermined alternating current voltage is output using a positive voltage of the direct current power source input via the first switching element, a negative voltage of the direct current power source input via the second switching element, and an intermediate voltage of the direct current power source input via the bidirectional switch, in a period in which a polarity of an output voltage and a polarity of an output current are the same, two predetermined elements are alternately turned on and off at a first frequency, and in a period in which the polarity of the output voltage and the polarity of the output current are different, the two predetermined elements are alternately turned on and off at a second frequency lower than the first frequency.