Title:
AC/DC CONVERSION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/053975
Kind Code:
A1
Abstract:
[Problem] To keep the power factor of an AC input high using a step-down AC/DC conversion circuit while outputting a high DC voltage.
[Solution] An AC/DC conversion circuit 1 is provided with an input unit 11, an output unit 17, a first sub AC/DC conversion circuit 13, and a second sub AC/DC conversion circuit 15. The first sub AC/DC conversion circuit 13 has: an inductor element L having one end connected through a switching circuit SW to a first input terminal I1; a first capacitor element C1 having one end connected to the other end of the inductor element L and the other end connected to a first output terminal O1; and a first rectifier element D1, the cathode and anode sides of which are connected to a second input terminal I2 and the first output terminal O1, respectively. The second sub AC/DC conversion circuit 15 has: the inductor element L; the switching circuit SW; a second capacitor element C2 having one end connected to the other end of the inductor element L and the other end connected to a second output terminal O2; and a second rectifier element D2, the anode and cathode sides of which are connected to the second input terminal I2 and the second output terminal O2, respectively.
Inventors:
KATAOKA KOTARO (JP)
NOMURA MASARU (JP)
IWATA HIROSHI (JP)
NOMURA MASARU (JP)
IWATA HIROSHI (JP)
Application Number:
PCT/JP2018/022317
Publication Date:
March 21, 2019
Filing Date:
June 12, 2018
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
H02M7/12
Foreign References:
| JP2013005642A | 2013-01-07 | |||
| JP2017017775A | 2017-01-19 | |||
| US20130082666A1 | 2013-04-04 |
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