Patent ID: 8422255
Filing Date: 2013-04-16
Classification: H02M

Abstract:
1. A power converter provided by connecting an input power supply of a power conversion circuit, an oscillation control part composed of a control switching element and a damping resistance connected in parallel, and a main switching element in the form of a circuit loop, wherein the control switching element and the main switching element have a relationship such as Ron(S2)<E(Rg)×fsw /(D×I D is a duty of the main switching element (ratio of on-period in one cycle), R I is a load current of a chopper circuit, E(R f the power converter further comprises a timing control device to control respective gate voltages of the main switching element and the control switching element in such a manner that the main switching element is turned off and after a current of the main switching element has become zero, the control switching element is turned off.