Title:
POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO2017009963
Kind Code:
A1
Abstract:
Provided is a power supply device that can improve the power factor and suppress harmonics, and can bring a DC bus voltage close to a target voltage, without the need for using a large inductive reactance element, and in turn not lead to a rise in costs, and without causing the problem of decreased power conversion efficiency due to switching loss. This power supply device includes: a rectifier circuit for rectifying AC voltage; a bus current detection unit for detecting a bus current outputted from the rectifier circuit; a bus voltage detection unit for detecting a bus voltage outputted by the rectifier circuit; a short-circuiting unit that short-circuits the input side of the rectifier circuit; and a switching control unit for controlling the short-circuit state due to a short circuit. The switching control unit has, as a standard, a zero-crossing point at which AC voltage becomes zero, and after continuously causing short-circuit operation of a short-circuiting unit, intermittently causes short-circuit operation of the short-circuiting unit.
Inventors:
KOIWA KENTA (JP)
Application Number:
PCT/JP2015/070230
Publication Date:
January 19, 2017
Filing Date:
July 15, 2015
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02M7/12
Domestic Patent References:
| WO2012070201A1 | 2012-05-31 |
Foreign References:
| JP2009100499A | 2009-05-07 | |||
| EP2595298A1 | 2013-05-22 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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