Patent ID: 8259469
Filing Date: 2012-09-04
Classification: H02M

Abstract:
1. A circuit to convert DC voltage received at a DC input to AC voltage, said circuit comprising: a transformer including a first primary winding, a second primary winding and at least one secondary winding, wherein said secondary winding is magnetically coupled to said first and second primary windings and provides AC voltage; a first series sub-circuit connected in parallel with said DC input and including a first capacitor and a second capacitor connected in series; a second series sub-circuit connected in parallel with said DC input and including said first primary winding, a clamping capacitor and said second primary winding sequentially connected in series; a third series sub-circuit connected in parallel with said clamping capacitor including a first switch and a second switch connected in series; and a center node of said first capacitor and said second capacitor within said first series sub-circuit and a center node of said first switch and said second switch within said third series sub-circuit are connected together.