US 12,074,461 B2
Contactless power supply device, power reception device, and power transmission device
Takashi Taya, Yokohama (JP)
Assigned to LAPIS Technology Co., Ltd., Yokohama (JP)
Filed by LAPIS TECHNOLOGY CO., LTD., Yokohama (JP)
Filed on Mar. 28, 2022, as Appl. No. 17/705,805.
Claims priority of application No. 2021-56344 (JP), filed on Mar. 30, 2021.
Prior Publication US 2022/0320915 A1, Oct. 6, 2022
Int. Cl. H02J 50/12 (2016.01); H02J 50/80 (2016.01); H02J 50/90 (2016.01)
CPC H02J 50/90 (2016.02) [H02J 50/12 (2016.02); H02J 50/80 (2016.02)] 24 Claims
OG exemplary drawing
 
1. A contactless power supply device for performing power transmission and power reception of an electric power in a non-contact manner, the contactless power supply device comprising:
a power transmission module that includes a first resonance circuit, the first resonance circuit including a power transmission coil generating a high-frequency magnetic field from a first high frequency current of the power transmission coil; and
a power reception module that includes a second resonance circuit, the second resonance circuit including a power reception coil generating a second high frequency current from the high-frequency magnetic field generated by the power transmission coil; and
a relative movement detection unit included in at least one of the power transmission module and the power reception module, the relative movement detection unit detecting an amplitude change of a high-frequency voltage corresponding to the first high frequency current of the power transmission coil or the second high frequency current of the power reception coil, and outputting an output signal indicating a physical relative movement of the power transmission coil and the power reception coil, and
wherein the relative movement detection unit is configured to output a vibration amount of the power transmission coil or the power reception coil to be detected where the power transmission module or the power reception module is mounted,
wherein the relative movement detection unit includes a wave detection circuit that extracts a DC component or an AC component from the high-frequency voltage to output the DC component or the AC component as an extracted signal, and
wherein the contactless power supply device further comprises an AD converter that converts the extracted signal into a digital signal, and a digital circuit that performs digital filter processing or Fourier transform processing based on the digital signal of the AD converter and outputs an intensity of a frequency component as the output signal.