The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 2009
Filed:
Jul. 24, 2007
Takeshi Morimoto, Osaka, JP;
Kenzo Danjo, Osaka, JP;
Tetsuro Ikeda, Osaka, JP;
Hideo Ishii, Osaka, JP;
Takeshi Morimoto, Osaka, JP;
Kenzo Danjo, Osaka, JP;
Tetsuro Ikeda, Osaka, JP;
Hideo Ishii, Osaka, JP;
Sansha Electric Manufacturing Company, Limited, Osaka-shi, Osaka-fu, JP;
Abstract
A welder power supply apparatus () includes an inverter (), which is driven intermittently when an electrode () and a workpiece () are separated from each other and no arc is being generated between them, whereby power loss generated in the inverter () when the inverter () is driven in the non-load state of the power supply apparatus and power loss caused by exciting current flowing through an transformer () disposed in the output of the inverter () can be reduced. The inverter () is driven continuously when output current (Io) becomes higher than a threshold value (Ib) after the electrode () and the workpiece () are brought into contact with each other for starting arcing between them. In this manner, the arcing can be initiated without fail.