公开(公告)号：US20190356132A1

公开(公告)日：2019-11-21

申请号：US16476248

申请日：2017-12-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Motohiko FUJIMURA ,  Masahiro YAMAOKA ,  Atsushi YAMAMOTO ,  Taiki NISHIMOTO

IPC: H02J3/02 ,  H02J13/00

Abstract: The power transmitter apparatus is provided with code modulators which modulate powers of phase components of three-phase alternating-current power to generate code-modulated waves, respectively, by code modulation using modulation codes based on code sequences different from each other, and transmits the code-modulated waves to the at least one power receiver apparatus via the transmission path. The power receiver apparatus is provided with code demodulators, each of which demodulates one code-modulated wave of the received code-modulated waves to generate code-demodulated power by code demodulation using a demodulation code based on a code sequence identical to the code sequence of the modulation code used for the code modulation of the one code-modulated wave, the code-demodulated power being generated as power of one of phase components of multiphase alternating-current power.

公开(公告)号：US20170179772A1

公开(公告)日：2017-06-22

申请号：US15118165

申请日：2014-02-28

Applicant: Panasonic Intellectual Property Management Co. Ltd.

Inventor： Kenichi ASANUMA ,  Atsushi YAMAMOTO ,  Hiroshi YAMAMOTO ,  Hiroshi KANNO

IPC: H02J50/60 ,  H02J50/12

CPC classification number: H02J50/12 ,  H02J7/025 ,  H02J17/00 ,  H02J50/60 ,  H02J50/80 ,  H02J50/90

Abstract: A foreign object detector detects a metallic foreign object between a first resonator and a second resonator which is composed of a parallel resonant circuit including a coil and a capacitor. The foreign object detector includes the first resonator; an oscillator circuit capable of oscillating at a first frequency (f1) which is lower than a resonant frequency (fr) of the second resonator and at a second frequency (f2) which is higher than the resonant frequency (fr); and a measurement circuit to measure changes in input impedance of the first resonator. The measurement circuit detects a metallic foreign object between the first resonator and the second resonator based on: changes in input impedance of the first resonator as measured by the measurement circuit while the oscillator circuit is oscillating at the first frequency f1; and changes in input impedance of the first resonator as measured by the measurement circuit while the oscillator circuit is oscillating at the second frequency f2.