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Patent Searching and Data


Title:
POWER SOURCE APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/061932
Kind Code:
A1
Abstract:
The present invention protects a semiconductor switch by limiting current that fluctuates because of load fluctuation. A protection circuit 14, which is provided with: a switch circuit 19 that becomes conductive when a conductive voltage having a prescribed magnitude is applied; and a sub-reactance circuit 30 having a prescribed reactance value, is connected in parallel to a main reactance circuit 13 through which a high-frequency current flows by the semiconductor switch. When the switch circuit 19 becomes conductive, the main reactance circuit 13 and the sub-reactance circuit 30 are connected in parallel, and the high-frequency current flows through the resulting parallel-connection circuit. The semiconductor switch is protected since impedance value of the parallel-connection circuit is set greater than that of the main reactance circuit 13 and the current is limited when the switch circuit 19 becomes conductive.

Inventors:
NAKASHIMA Kenya (INC. 2500, Hagisono, Chigasaki-sh, Kanagawa 43, 〒2538543, JP)
OOHASHI Dougo (INC. 2500, Hagisono, Chigasaki-sh, Kanagawa 43, 〒2538543, JP)
MIYANO Yoshinori (INC. 2500, Hagisono, Chigasaki-sh, Kanagawa 43, 〒2538543, JP)
KAIDA Masayuki (INC. 2500, Hagisono, Chigasaki-sh, Kanagawa 43, 〒2538543, JP)
Application Number:
JP2017/033905
Publication Date:
April 05, 2018
Filing Date:
September 20, 2017
Export Citation:
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Assignee:
ULVAC, INC. (2500, Hagisono Chigasaki-sh, Kanagawa 43, 〒2538543, JP)
International Classes:
H02H9/02
Foreign References:
JPS5866832U1983-05-07
JP2004350337A2004-12-09
JP2014183692A2014-09-29
JPS6059745U1985-04-25
JP2001509357A2001-07-10
Attorney, Agent or Firm:
ISHIJIMA Shigeo et al. (Toranomonkougyou Bldg, 3F 1-2-18, Toranomon, Minato-k, Tokyo 01, 〒1050001, JP)
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