POWER TRANSMISSION DEVICE, POWER RECEPTION DEVICE AND WIRELESS POWER FEEDING SYSTEM

Japanese Patent JP2020061889

A

To enhance robustness against deviation in a resonance frequency of a power transmission device, in a power transmission device that transmits a power by a magnetic field resonance system.SOLUTION: A power transmission device 1 that transmits a power in a non-contact manner by a magnetic field resonance system, comprises: a resonance circuit that includes a power transmission coil 13 for transmitting a power and a capacitor 12; a power supply circuit 10 that supplies an AC power to the power transmission coil; and an LC filter 11 provided between the power supply circuit and the power transmission coil. A frequency f0 of the AC power supplied by the power supply circuit is 500 kHz to 15 MHz. A frequency characteristic as a whole obtained by combining the resonance circuit and the LC filter has a peak of a resonance frequency f of the resonance circuit and a peak of a resonance frequency f1 of the LC filter. The frequency f0 is located between the frequency f and the frequency f1, and an absolute value of a difference between the frequency f and the frequency f0 is 10 Hz to 2 MHz, and an absolute value of a difference between the frequency f1 and the frequency f0 is 10 Hz to 2 MHz.SELECTED DRAWING: Figure 1

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SUGAFUJI TORU
FUKI SHINICHIRO
SATO MAKOTO
IMAI JUN

JP2018192974A

April 16, 2020

October 11, 2018

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TOYODA GOSEI KK

H02J50/12

JP2012034494A	2012-02-16
JP2018007462A	2018-01-11
JP2017200340A	2017-11-02
JP2017184537A	2017-10-05
JP2011205757A	2011-10-13

WO2016190095A1	2016-12-01
US20140300202A1	2014-10-09

Osamu Fujitani
Akinori Isshiki
Tomohiro Sumiya

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