公开(公告)号：US20180069435A1

公开(公告)日：2018-03-08

申请号：US15805633

申请日：2017-11-07

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Tsutomu SAKATA ,  Hiroshi YAMAMOTO ,  Hiroshi KANNO ,  Kenichi ASANUMA

IPC: H02J50/12 ,  H02J50/70 ,  H02J7/02 ,  H02J5/00 ,  H02J50/60

CPC classification number: H02J50/12 ,  H02J5/005 ,  H02J7/025 ,  H02J50/60 ,  H02J50/70

Abstract: A power transmission device includes an inverter, an oscillator, a foreign substance detector, and a power transmission control circuitry. The power transmission control circuitry causes the foreign substance detector to perform a series of multiple processes and determine whether a foreign substance is present before a transmission of first AC power starts, and then causes the inverter to start the transmission of the first AC power. After the transmission starts, a detection period in which foreign substance detecting is performed and a power transmission period in which transmission of the first AC power is performed are repeated. The series of multiple processes is divided and performed in the multiple repeated detecting periods. The foreign substance detector is caused to divide and perform the series of multiple processes using the detecting periods and determine whether a foreign substance is present.

公开(公告)号：US20170338694A1

公开(公告)日：2017-11-23

申请号：US15670371

申请日：2017-08-07

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Hideo OOSUMI ,  Hiroshi KANNO ,  Hiroshi YAMAMOTO ,  Tsutomu SAKATA

IPC: H02J50/10 ,  H02J50/80

CPC classification number: H02J50/10 ,  H02J7/025 ,  H02J50/12 ,  H02J50/60 ,  H02J50/80 ,  H02J50/90

Abstract: A control method for a power transmitting device is provided, the power transmitting device including a power transmitting antenna, which transmits AC power wirelessly to the power receiving antenna of a power receiving device, and an oscillator. The method includes supplying pulse signals that control first and second switching element groups to the oscillator, and changing a phase shift amount between a first pulse signal and a second pulse signal. The method also includes causing the oscillator to change the voltage of the AC power output and to set an initial value of the phase shift amount. The method further includes causing the oscillator to output preliminary AC power of a voltage to reduce the phase shift amount from the initial value, fixing the phase shift amount, and causing the oscillator to output the AC power while maintaining the voltage corresponding to the fixed phase shift amount.