| 摘要 |
PROBLEM TO BE SOLVED: To provide an electromagnetic welding set using a semiconductor switch and a welding transformer, without causing damage or consumption of a contact and occurrence of noise. SOLUTION: In the electromagnetic welding set for generating eddy current and electromagnetic force by applying magnetic flux generated by a magnetic flux generating coil to stacked metal sheets, and performing the seam welding of the metal sheets, a plurality of welding transformers 1 and 1 are provided, secondary windings 5 and 5 thereof connected in parallel and connected to a magnetic flux generating coil 6, and primary windings 2 and 2 of the welding transformers 1 and 1 are connected to capacitors 3 and 3 via semiconductor switches 4 and 4. A control device 8 of the semiconductor switches 4 and 4 to discharge charges accumulated in the capacitors 3 and 3 through the primary windings 2 and 2 of the welding transformers 1 and 1 by simultaneously closing the semiconductor switches 4 and 4 is provided. COPYRIGHT: (C)2004,JPO
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