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1. (WO2017033614) POWER TRANSMISSION APPARATUS AND NON-CONTACT POWER SUPPLY SYSTEM

Pub. No.:    WO/2017/033614    International Application No.:    PCT/JP2016/070964
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Sat Jul 16 01:59:59 CEST 2016
IPC: H02J 50/60
H02J 50/12
H02J 50/80
Applicants: ROHM CO., LTD.
ローム株式会社
Inventors: IKEFUJI Yoshihiro
生藤 義弘
SEIKE Takeshi
清家 健
YOSHII Yusuke
吉井 佑介
Title: POWER TRANSMISSION APPARATUS AND NON-CONTACT POWER SUPPLY SYSTEM
Abstract:
This power transmission apparatus transmits power to a power reception apparatus by means of a magnetic field resonance system by supplying an output AC voltage (VE) of a class E amplifier (440) to a power-transmission side resonance circuit (TT). Before the transmission of power, the output AC voltage (VE) of the class E amplifier (440) is divided, and a voltage obtained by the division is supplied to the power-transmission side resonance circuit (TT). A current amplitude detection value of a power-transmission side coil (TL) at this time is obtained as an evaluation value, and whether to permit execution of power transmission is controlled on the basis of the evaluation value, through determination as to whether a foreign object is present or not.