Patent ID: 9419530
Filing Date: 2016-08-16
CPC Classification: G01R,H02M,Y02B

Claim Text:
1. A power estimation device using a coaxial winding transformer, comprising: a switching control unit configured to generate primary current by performing switching control on a power source; a coaxial winding transformer including a core, a primary winding, a secondary winding, and an auxiliary winding that are wound on the core, the coaxial winding transformer configured to output secondary current in accordance with the winding ratio of the secondary winding to the primary winding based on the primary current; and a power estimation unit configured to determine power outputted to the secondary winding by sensing output of the auxiliary winding in accordance with winding ratio of the auxiliary winding to the primary winding, the primary winding having a coil wound on a first side of the core and the auxiliary winding wound on a second side of the core, the first side and the second side being opposite each other, wherein the coaxial winding transformer is formed by winding a cable around the core in which at least one a plurality of inner conductors is used as the secondary winding and an outer conductor surrounding the at least one of the plurality of inner conductors is used as the auxiliary winding.