Title:
DEVICE AND METHOD FOR NON-CONTACT POWER TRANSMISSION
Document Type and Number:
Japanese Patent JP2017050982
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a non-contact power transmission device and a method therefor, enabling obtaining a coupling coefficient only by phase measurement, without large-scale circuit reassembly.SOLUTION: A non-contact power transmission device transmits power in a non-contact manner from a power transmission unit to a power reception unit by magnetic field coupling between a primary coil for power transmission and a secondary coil for power reception, with an equal resonance angular frequency ω0 between the power transmission unit and the power reception unit. The power reception unit has short-circuit means for short circuiting the load of the power reception unit. Coupling coefficient measurement means provided in the power transmission unit calculates a coupling coefficient from input impedance phases to two or more different frequencies.SELECTED DRAWING: Figure 1
Inventors:
KAWAMURA TAKASHI
Application Number:
JP2015172581A
Publication Date:
March 09, 2017
Filing Date:
September 02, 2015
Export Citation:
Assignee:
DENKI KOGYO CO LTD
International Classes:
H02J50/00; H01F38/14
Attorney, Agent or Firm:
Satoshi Taniguchi