Title:
NON-CONTACT POWER TRANSMISSION APPARATUS
Document Type and Number:
Japanese Patent JP3906708
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a non-contact power transmission apparatus which can conduct a power supply control identifying power supply states, has a simple construction, and produces little noise.
SOLUTION: In this non-contact power transmission apparatus 1, an induced voltage is generated in a second coil L2 by a flux, generated by a first coil L1 to which a high frequency power is supplied by a high frequency inverter circuit 11, and the induced voltage is transformed by a power transformation circuit 21 into a prescribed pattern to be outputted to a load 30. A secondary control circuit 23 turns on/off a switch S2 according to the state of the load 30 to change an excitation state of a fifth coil L5. A differential resonation circuit 12 detects a power supply state according to the excitation state of the coil L5 or the existence of a non-contact receiver 2, and outputs a detection signal. According to the detection signal, an inverter control circuit 13 controls oscillation of the inverter circuit 11.
Inventors:
Hideaki Abe
Takeshi Kojima
Katsura Yoshishiki
Mikihiro Yamashita
Tomohiro Izumi
Takeshi Kojima
Katsura Yoshishiki
Mikihiro Yamashita
Tomohiro Izumi
Application Number:
JP2002048785A
Publication Date:
April 18, 2007
Filing Date:
February 25, 2002
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS,LTD.
International Classes:
H01F38/14; H02J7/00; H02J50/00; H02J50/10; H02J50/60; H02J50/80; H02M7/48; (IPC1-7): H02J17/00; H01F38/14; H02M7/48
Domestic Patent References:
| JP6311658A | ||||
| JP11178249A |
Attorney, Agent or Firm:
Keisei Nishikawa
Atsuo Mori
Atsuo Mori
Previous Patent: LID FOR CUP AND APPARATUS FOR MOUNTING THE SAME
Next Patent: PUSH-PULL OUTPUT CIRCUIT AND OPERATIONAL AMPLIFIER
Next Patent: PUSH-PULL OUTPUT CIRCUIT AND OPERATIONAL AMPLIFIER