Title:
POWER SUPPLY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/105141
Kind Code:
A1
Abstract:
This power supply system is provided with a plurality of AC output converters which supply power to an AC load and are connected in parallel. Each of the plurality of AC output converters includes: an AC-to-DC converter which converts an external AC voltage to a DC voltage; a DC-to-AC converter which converts a DC voltage to an AC voltage and supplies the AC voltage to an AC load; a secondary cell which is connected to the DC-to-AC converter in parallel and stores the DC voltage; a first switching circuit which is provided between the AC load and the DC-to-AC converter; a bypass path for directly supplying, to the AC load, the external AC voltage instead of the AC voltage supplied from the DC-to-AC converter; a second switching circuit provided between the AC load and the bypass path; a switching control circuit which controls the first and second switching circuits at power failure and at power recovery; and a control power supply circuit which is supplied with the external AC voltage and the AC voltage and generates a control voltage of the control circuit. When it is detected that a voltage supply from the secondary cell to the AC load is lowered at the power failure of the external AC voltage, the switching control circuit causes the first switching circuit to be turned off; and when it is detected that all the voltage supplies from the plurality of AC output converters to the AC load are stopped, the switching control circuit causes the second switching circuit to be turned on.
Inventors:
MATSUOKA KAZUMASA (JP)
HAYASHI KENTA (JP)
HAYASHI KENTA (JP)
Application Number:
PCT/JP2018/042992
Publication Date:
May 28, 2020
Filing Date:
November 21, 2018
Export Citation:
Assignee:
TOSHIBA MITSUBISHI ELEC IND (JP)
International Classes:
H02J9/06; H02J7/34
Foreign References:
| JP2002010527A | 2002-01-11 | |||
| JPH02280640A | 1990-11-16 | |||
| JPH0511751U | 1993-02-12 | |||
| JP2008283788A | 2008-11-20 | |||
| JP2015180136A | 2015-10-08 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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