公开(公告)号：US20190305610A1

公开(公告)日：2019-10-03

申请号：US16298054

申请日：2019-03-11

Applicant: TDK CORPORATION

Inventor： Hisashi OYAMA

IPC: H02J50/80 ,  H02J50/12 ,  H04B5/00 ,  B60L53/10 ,  B60L53/53

Abstract: A wireless power transmission device, configured to transmit AC power to a power receiving coil of a wireless power reception, and that can curb an increase in production costs and curb destabilization of the power which is received by a wireless power reception device with a decrease in quality of wireless communication includes: power transmitting coil that is magnetically coupled to the power receiving coil; power transmitting circuit that is configured to supply an AC voltage to the power transmitting coil; transmission-side communication unit that is configured to perform wireless communication with the wireless power reception device; measuring unit that is configured to measure a characteristic value of the wireless communication; and control circuit that is configured to control the AC voltage which is supplied from the power transmitting circuit to the power transmitting coil on the basis of the characteristic value measured by the measuring unit.

公开(公告)号：US20190013691A1

公开(公告)日：2019-01-10

申请号：US16030324

申请日：2018-07-09

Applicant: TDK CORPORATION

Inventor： Kazunori OSHIMA ,  Hisashi OYAMA

IPC: H02J7/02 ,  H02J50/12 ,  G01R31/02 ,  G01R31/42

Abstract: Disclosed herein is a wireless power receiving device that wirelessly receives power transmitted from a wireless power transmitting device. The wireless power receiving device comprises: a power receiving coil that receives an AC power through a magnetic field; a power-receiving-side capacitor that constitutes a resonance circuit together with the power receiving coil; a rectifying circuit that rectifies the AC power received by the power receiving coil by a plurality of bridge-connected semiconductor devices each having a rectifying function; and a short-circuit detection circuit that detects a short circuit in the rectifying circuit based on a first AC voltage which is a voltage between a one-side input line of the rectifying circuit and a stable potential and a second AC voltage which is a voltage between the other-side input line of the rectifying circuit and the stable potential.