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Title:
ALTERNATING-CURRENT POWER SOURCE DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/159455
Kind Code:
A1
Abstract:
An alternating-current power source device 1 comprises input capacitors 11 and 12 of which a mutual connecting node is a neutral point X of a three-phase output, transistor bridges 20* each comprising PWM control bridges 20*1 and 20*2 (where *=U, V, W) each including two switch elements, transformers T* connected to output terminals of the transistor bridges 20*, reactors Ls* connected to the transformers T*, and smoothing capacitors 40* connected to the reactors Ls*. The transformers T* are autotransformers containing a core 33*, and windings 31* and 32*, each of which has one end connected to the respective output terminal of the PWM control bridges 20*1 and 20*2 and which are linked to one another by way of the core 33*, and each of which has another end connected to the reactor Ls*. The windings 31* and 32* are each wound in directions whereby magnetic flux generated in the cores 33* is mutually canceled out.

Inventors:
OTAKE Hirotaka (C/O ROHM CO. LTD, 21, Saiin Mizosaki-Cho, Ukyo-Ku, Kyoto-Sh, Kyoto 85, 〒6158585, JP)
MIYAZAKI Tatsuya (C/O ROHM CO. LTD, 21, Saiin Mizosaki-Cho, Ukyo-Ku, Kyoto-Sh, Kyoto 85, 〒6158585, JP)
TSURUYA Mamoru (C/O Power Assist Technology Ltd, 1220-1 Tsukagoshi, Sakado Cit, Saitama 09, 〒3500209, JP)
Application Number:
JP2018/042153
Publication Date:
August 22, 2019
Filing Date:
November 14, 2018
Export Citation:
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Assignee:
ROHM CO., LTD. (21 Saiin Mizosaki-Cho, Ukyo-Ku Kyoto-Sh, Kyoto 85, 〒6158585, JP)
International Classes:
H02M7/48
Foreign References:
JP2016540475A2016-12-22
JPS6359771A1988-03-15
JPH04355906A1992-12-09
JP2013172562A2013-09-02
Attorney, Agent or Firm:
SANO PATENT OFFICE (5F Tenmabashi-Yachiyo Bldg. Bekkan, 2-6 Tenmabashi-Kyomachi, Chuo-Ku, Osaka-Sh, Osaka 32, 〒5400032, JP)
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