Title:
WIRELESS POWER SUPPLY SYSTEM, WIRELESS POWER TRANSMISSION DEVICE, AND WIRELESS POWER RECEPTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/213031
Kind Code:
A1
Abstract:
A wireless power supply system (301) that comprises a power transmission device (101) and a power reception device (201). A control circuit (12) of the power transmission device (101) makes a power transmission circuit (11) operate on the basis of a pulse density modulation control method that controls the density of oscillation pulses per prescribed period such that, when De1 is the pulse density as determined on the basis of demodulation results for a transmission signal from the power reception device, De2 is the pulse density when an output detection value from the power transmission circuit (11) has reached a prescribed value, and De3 is the pulse density when a temperature detection value for switch elements (Q11, Q12) has reached a prescribed value, De1>De2>De3.
Inventors:
HOSOTANI TATSUYA (JP)
Application Number:
PCT/JP2017/020543
Publication Date:
December 14, 2017
Filing Date:
June 02, 2017
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H02J50/80; H02J50/12
Foreign References:
| JP2014180201A | 2014-09-25 | |||
| JP2014117124A | 2014-06-26 | |||
| JPH11187582A | 1999-07-09 | |||
| JP2002209344A | 2002-07-26 | |||
| JP2016063694A | 2016-04-25 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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