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:
Mar. 14, 2000
Filed:
Jul. 15, 1998
Matsushita Electric Industrial Co., Ltd., Osaku-fu, JP;
Abstract
An arc welding apparatus having output terminals of a constant current characteristic and a constant voltage characteristic is simply provided at low cost with a reactor appropriate for both the characteristics. A current control circuit 2 controls a secondary output current of a welding transformer 1 by means of a current control device, while a first reactor 3 and a second reactor 4 are constructed so that magnetic flux formed by a first winding 3a and magnetic flux formed by a second winding 4a, which are wound around an annular iron core 7, overlap each other. The other terminal of the first reactor 3 is connected to a constant current characteristic output terminal 8, while the other terminal of the second reactor 4 is connected to a welding base metal use output terminal 10. A constant voltage characteristic output terminal 9 and one terminal of the first reactor 3 are connected to the positive side of the current control circuit 2, while one terminal of the second reactor 4 is connected to the negative side of the current control circuit 2.