Patent ID: 9225258
Filing Date: 2015-12-29
Classification: H02J,H02M,H02P,Y02B

Abstract:
1. Backflow preventing means comprising: a backflow preventing element that is connected between a power supply and a load and that prevents an electric current from flowing backward from the load toward the power supply; and commutating means for performing a commutation operation for causing the electric current of the same direction as a forward direction of the backflow preventing element to flow toward a different path that is connected in parallel with the backflow preventing element, the commutating means includes a commutation rectifying element that rectifies the electric current flowing through the different path, when the backflow preventing element is reverse-recovered, a transformer that performs the commutation operation by applying voltage based on voltage related to a primary winding to a secondary winding on the different path, and a transformer driving device that controls application of voltage to the primary winding of the transformer.