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1. (WO2013118588) CAPACITOR-TYPE WELDING DEVICE AND CAPACITOR-TYPE WELDING METHOD

Pub. No.:    WO/2013/118588    International Application No.:    PCT/JP2013/051455
Publication Date: Fri Aug 16 01:59:59 CEST 2013 International Filing Date: Fri Jan 25 00:59:59 CET 2013
IPC: B23K 11/26
B23K 11/24
H02M 7/155
H02M 9/00
Applicants: ORIGIN ELECTRIC COMPANY, LIMITED
オリジン電気株式会社
Inventors: ARAI Kouji
新井 幸次
KADOYA Yasuo
角谷 康雄
KOMATSU Akio
小松 秋男
Title: CAPACITOR-TYPE WELDING DEVICE AND CAPACITOR-TYPE WELDING METHOD
Abstract:
[Problem] To provide an economical capacitor-type welding device and capacitor-type welding method having little power loss, that can be made more compact, and that reliably control a charging circuit without being affected by the inductance of a charging path. [Solution] A capacitor-type welding device and a capacitor-type welding method whereby: a bypass switch element (5) having a forward-blocking function is connected in parallel straddling between output terminals (3, 4) in a charging circuit (2); the bypass switch element (5) is made conductive so as to cause a backflow current, flowing by magnetic energy stored in the inductance of a first wound line (6a) or an inductor (14) included in the charging path, to bypass from the charging circuit; and a discharge switch element (8) is made conductive, after the bypass switch element (5) is made non-conductive and the forward-blocking function is recovered.