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1. (WO2017150711) POWER SUPPLY SYSTEM, POWER TRANSMISSION CIRCUIT AND POWER RECEIVING CIRCUIT

Pub. No.:    WO/2017/150711    International Application No.:    PCT/JP2017/008502
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Sat Mar 04 00:59:59 CET 2017
IPC: H02J 50/10
H02J 7/00
Applicants: YAMAHA HATSUDOKI KABUSHIKI KAISHA
ヤマハ発動機株式会社
Inventors: MIYAZAKI, Toshinori
宮崎 敏典
Title: POWER SUPPLY SYSTEM, POWER TRANSMISSION CIRCUIT AND POWER RECEIVING CIRCUIT
Abstract:
This wireless power supply system 1 is provided with a power receiving circuit 6 and a power transmission circuit 3. The power transmission circuit 3 comprises a power transmission resonance circuit 38 that includes an inductor of self-inductance L1 and a capacitor of capacitance C1. The power receiving circuit 6 comprises a power receiving resonance circuit 61 that includes an inductor of self-inductance L2 and a capacitor of capacitance C2. Driven at a drive frequency ω, the power transmission resonance circuit 38 transmits power from the power transmission circuit 3 to the power receiving circuit 6. The absolute value of the reactance X1 of the power transmission resonance circuit 38, determined by L1, C1 and ω, is configured to become greater than a first threshold value Th1 (Th1 ≧ 0), and the reactance X2 of the power receiving resonance circuit, determined by L2, C2 and ω, is configured to become 0. The power supply system 1 has a detection unit 5 which detects abnormalities in the power receiving circuit 6 on the basis of operation of the power transmission circuit 3.