Patent ID: 7622887
Filing Date: 2009-11-24
Classification: H01F,H01L,H02M,H03K

Abstract:
1. A power electronics equipment comprising: a pair of switching devices connected in series to each other and having one switching device working for an upper arm and the other switching device working for a lower arm, said switching devices having control terminals and being operable to make a current flowing to a load or to interrupt the current flowing to the load; a control circuit for generating control signals directing conduction and non-conduction of the switching devices; driver circuits for driving the control terminals of the respective switching devices based on the control signals; and insulating transformers disposed to correspond to the switching devices to insulate the control circuit and the driver circuits from each other, each of the insulating transformers being an air-cored insulating transformer and comprising a substrate, a primary winding, a secondary winding facing the primary winding, and an insulator layer, said primary and second windings being laminated one on the other through the insulator layer and disposed on the same substrate.