WIRELESS POWER RECEPTION DEVICE AND WIRELESS POWER TRANSMISSION SYSTEM

    公开(公告)号:US20190305613A1

    公开(公告)日:2019-10-03

    申请号:US16365236

    申请日:2019-03-26

    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.

    WIRELESS POWER RECEPTION DEVICE AND WIRELESS POWER TRANSMISSION SYSTEM

    公开(公告)号:US20190305612A1

    公开(公告)日:2019-10-03

    申请号:US16359967

    申请日:2019-03-20

    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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