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公开(公告)号:US20190305613A1
公开(公告)日:2019-10-03
申请号:US16365236
申请日:2019-03-26
Applicant: TDK CORPORATION
Inventor: Kazunori OSHIMA , Ryo MIYAZAWA , Shinya OFUJI
Abstract: A wireless power reception device that can detect a position of a power receiving coil relative to a power transmitting coil irrespective of a connection state of a load is provided. A wireless power reception device includes: a power receiving coil that is magnetically coupled to the power transmitting coil; a first rectifier circuit that rectifies an AC voltage supplied from the power receiving coil and outputs the rectified voltage to a load; a first capacitor connected between an 11th output terminal on the high potential side among output terminals included in the first rectifier circuit and a 12th output terminal on the low potential side among the output terminals included in the first rectifier circuit between the first rectifier circuit and the load; a second rectifier circuit that is connected to the power receiving coil in parallel to the first rectifier circuit and rectifies the AC voltage supplied from the power receiving coil; a second capacitor connected between a 21st output terminal on the high potential side among output terminals included in the second rectifier circuit and a 22nd output terminal on the low potential side among the output terminals included in the second rectifier circuit; a second voltage detecting circuit that detects a voltage between the 21st output terminal and the 22nd output terminal; and a position detecting circuit that detects a position of the power receiving coil relative to the power transmitting coil on the basis of the voltage detected by the second voltage detecting circuit.
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公开(公告)号:US20190305612A1
公开(公告)日:2019-10-03
申请号:US16359967
申请日:2019-03-20
Applicant: TDK CORPORATION
Inventor: Kazunori OSHIMA , Ryo MIYAZAWA , Kenji FURUKAWA , Shinya OFUJI
Abstract: A wireless power reception device detects a power receiving coil position relative to a power transmitting coil while curbing an increase in power loss. The wireless power reception device includes: a power receiving coil magnetically coupled to the power transmitting coil; a first rectification and smoothing circuit rectifying an AC voltage supplied from the power receiving coil and outputs the rectified AC voltage to a load; first and second capacitors respectively connected to first and second transmission lines; a first resistor having one terminal connected to the first capacitor and the other terminal is supplied with a predetermined reference potential; a second resistor having one terminal connected to the second capacitor and the other terminal is supplied with the reference potential; and a position detecting circuit detecting the power receiving coil position relative to the power transmitting coil on the basis of first and second junction point potentials.
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