US Patent 7760521 Half-bridge resonant converter

A half-bridge resonant converter includes: a primary winding; a secondary winding having a first and a second end and a central point; a first electronic switch; a second electronic switch; a first power-storage element; a second power-storage element; and a load having a first and a second end. Wherein, the first end of said the secondary winding serially connects with said the first electronic switch and the first power-storage element, and the second end of said the secondary winding serially connects with said the second electronic switch and the second power-storage element, and the first end of said the load connects simultaneously with said the first power-storage element and the second power-storage element, and the second end connects with the central point of the secondary winding.