Title:
POWER SUPPLY DEVICE AND CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/097967
Kind Code:
A1
Abstract:
The present invention provides a technology for enabling suppression of large fluctuations of output voltage of an LC resonant converter (LLC converter, LCC converter, etc.) at a time when there is a change in operating conditions of the LC resonant converter. This power supply device is provided with an LC resonant converter (10) and a control unit (20), wherein in the case where the fluctuation width of output current or the like exceeds a fluctuation width threshold, the control unit (20) stops output voltage feedback control and starts open-loop control in which a switching frequency at which the output voltage of the LC resonant converter (10) becomes a target voltage is calculated from input voltage, etc. of the LC resonant converter (10), and then switching elements in a signal generation circuit (11) of the LC resonant converter (10) are driven at the calculated switching frequency.
Inventors:
ZHAO QIAN (JP)
HYODO TAKASHI (JP)
HYODO TAKASHI (JP)
Application Number:
PCT/JP2018/039488
Publication Date:
May 23, 2019
Filing Date:
October 24, 2018
Export Citation:
Assignee:
OMRON TATEISI ELECTRONICS CO (JP)
International Classes:
H02M3/28
Domestic Patent References:
| WO2014169821A1 | 2014-10-23 |
Foreign References:
| JP2016019322A | 2016-02-01 | |||
| JP2013251974A | 2013-12-12 | |||
| JP2015154525A | 2015-08-24 | |||
| JP2013027270A | 2013-02-04 | |||
| JP2003510001A | 2003-03-11 |
Other References:
KATSUYA HIRACHI, CIRCUIT CONFIGURATION AND OPERATION PRINCIPLE OF LLC-TYPE DC/DC CONVERTER, 29 May 2014 (2014-05-29), Retrieved from the Internet
See also references of EP 3713065A4
See also references of EP 3713065A4
Attorney, Agent or Firm:
IP FIRM SHUWA (JP)
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