POWER SUPPLY CIRCUIT

WIPO Patent Application WO/2019/064714

A1

[Problem] To enhance the service life and the reliability of a capacitor element of an AC/DC conversion circuit. [Solution] A power supply circuit 1 is a circuit in which a plurality of AC/DC conversion circuits 11 are connected in parallel. The plurality of AC/DC conversion circuits 11 each have a first rectifying circuit 111, a capacitor element C, a power factor improvement circuit 113, and a parallel connection terminal 115. The first rectifying circuit 111 rectifies an AC input and outputs a rectified output across a first input terminal I1 and a second input terminal I2. The capacitor element C smooths the rectified output and outputs a first DC output V1 across both terminals thereof. The power factor improvement circuit 113 is disposed between the first rectifying circuit 111 and the capacitor element C and has at least an inductor element L and/or a transformer element, a first switching element SW1, and a second rectifying circuit 1131. The parallel connection terminals 115 connect the capacitor element C and the capacitor element C possessed by another AC/DC conversion circuit 11 to each other in parallel.

JP2011103455	INTEGRATED REACTOR AND ACTIVE FILTER
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JP3097519	CHOPPER TYPE DC-DC CONVERTER

NOMURA MASARU (JP)
KATAOKA KOTARO (JP)
SUZUKI TAKAMITSU (JP)
IWATA HIROSHI (JP)

PCT/JP2018/022318

April 04, 2019

June 12, 2018

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NIDEC CORP (JP)

H02M3/155

JP2012010507A	2012-01-12
JPH11113256A	1999-04-23
JPH1052033A	1998-02-20

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