NON-CONTACT POWER TRANSMISSION DEVICE, NON-CONTACT POWER TRANSMISSION METHOD, AND NON-CONTACT POWER SUPPLY SYSTEM

WIPO Patent Application WO/2024/048111

A1

Power is supplied by use of resonance from a power transmission device (50) to the side of a power reception coil (31) that is magnetically coupled to a power transmission coil (51). In this case, in order that overcurrent does not flow through a resonant circuit (53) even if the resonant circuit is brought into an operation state in a state in which the power transmission coil and the power reception coil are not magnetically coupled to each other, the power transmission device supplies AC power from a main power supply device (70) to the resonant circuit including the power transmission coil that is magnetically coupled to the power reception coil provided in a power reception device (30) via power lines (NL1, NL2) and brings the resonant circuit into a resonant state when the power reception coil is close to the power transmission coil and into a non-resonant state when the power reception coil is not close to the power transmission coil. Furthermore, when detecting an abnormality associated with the supply of power to the power reception device, the power lines are switched to a non-conduction state and the supply of AC power from the main power supply device to the resonant circuit is interrupted.

NAKAYASHIKI YUSEI (JP)
YAMAGUCHI NOBUHISA (JP)

PCT/JP2023/026596

March 07, 2024

July 20, 2023

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DENSO CORP (JP)

H02J50/40; H02J50/12

WO2020217446A1

2020-10-29

JP2017131008A	2017-07-27
JP2013240246A	2013-11-28

BENRISHIHOJIN MEISEI INTERNATIONAL PATENT FIRM (JP)

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