Patent ID: 8537585

Claim:
A DC-AC converter, comprising: a switch circuit configured to receive a DC power and convert the DC power into an AC modulating voltage for output between a first output terminal and a second output terminal, the switch circuit comprising: a first switch branch including a first switch element and a second switch element connected in series with each other, wherein the first switch element and the second switch element are connected to the first output terminal; and a second switch branch connected in parallel with the first switch branch, and including a third switch element, a fourth switch element, and a fifth switch element connected in series with each other, wherein the fourth switch element and the fifth switch element are connected to the second output terminal; and a sixth switch element having one end connected between the third switch element and the fourth switch element, and the other end connected between the first switch element and the second switch element and connected to the first output terminal; wherein the first switch element and the fifth switch element are turned on and off simultaneously and continuously and the sixth switch element is turned on during positive half-cycles, and the second switch element and the third switch element are turned on and off simultaneously and continuously and the fourth switch element is turned on during negative half-cycles.