Patent ID: 7423891

Claim:
An inverter to convert DC power into AC for driving a load, comprising: a DC power source having a supply terminal to supply a DC current and a return terminal to return the same; a resonance transformer having a primary winding and a secondary winding, wherein the primary winding has a first end terminal, a second end terminal, and a center tap terminal; the secondary winding having a first output terminal and a second output terminal for connecting the load thereacross; a first switch having a first terminal, a second terminal, and a control terminal connectable to a control signal actuating a connection or disconnection status between the first and second terminals, wherein the first terminal connects to the supply terminal and the second terminal connects to the center tap terminal; a second switch having a first terminal, a second terminal, and a control terminal connectable to a control signal actuating the connection or disconnection status of the first and second terminals, wherein the first terminal connects to the return terminal and the second terminal connects to the first end terminal; a third switch having a first terminal, a second terminal, and a control terminal connectable to a control signal actuating the connection or disconnection status of the first and second terminals, wherein the first terminal connects to the return terminal and the second terminal connects to the second end terminal; a controller unit providing a common controlling signal for generating the three control signals to selectively control in concurrent manner the first, second, and third switches responsive thereto, whereby the first, second, and third switches are actuated to selective combinations of connection and disconnection states.