PRIMARY POWER SUPPLY SIDE POWER DEVICE IN NON-CONTACT POWER SUPPLY

Japanese Patent JP3840765

B2

PROBLEM TO BE SOLVED: To track load resonance in a primary feeder, to adjust circuit constant itself so as to be brought close to the resonance frequency of a power receiving device, and to supply power efficiently in the power receiving device.
SOLUTION: This power device 1 supplies a primary feeder 9 with a high-frequency current, on the basis of an input signal related to oscillation frequency. A phase-locking circuit 2 uses an output current and resonance voltage in the primary feeder 9 as input signals and determines the oscillation frequency fed to the power circuit 1 so that these phases coincide. An inductance adjusting circuit 6 is connected to the primary feeder 9 and adjusts the inductance value of the entire primary feeder 9, on the basis of a control signal. A control-signal generating circuit 5 employs the difference in resonance frequencies in a resonance circuit for power receiving devices 10a-10n which receive power from the primary feeder 9 and oscillation frequency determined by the phase-locking circuit 3 as an input signal, and generates a control signal supplied to the inductance adjusting circuit 6 so that the input difference is kept within a specified range.

Atsushi Okuno

JP32180697A

November 01, 2006

November 21, 1997

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Shinko Electric Co., Ltd.

B60L5/00; (IPC1-7): H02J17/00; B60L5/00

JP5100552A
JP8501435A
JP8265993A
JP8340650A

Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama

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