Frequency-changing welding arrangement

Details Frequency-changing welding arrangement Frequency-changing welding arrangement

1997-05-29

1999-08-24

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

363142, B23K 1124

Patent

active

059421347

ABSTRACT:
A converter welding arrangement with a welding control for the operation on mains with different voltages, having a welding transformer which is designed for operation on a mains with the lowest voltage of different possible voltages and to which the alternating voltage which is generated by AC conversion from the rectified mains voltage is supplied directly. A saturation monitoring arrangement monitors the current in the transformer and breaks off or interrupts the current supply to the welding transformer (18) when the current (I.sub.P) flowing across the welding transformer (18) exceeds a threshold value (I.sub.T)

REFERENCES:
patent: 4656571 (1987-04-01), Umezu
patent: 4709132 (1987-11-01), Tengler et al.
patent: 4748550 (1988-05-01), Okado
patent: 4973815 (1990-11-01), Ito et al.
patent: 5570254 (1996-10-01), Spilger et al.
patent: 5601741 (1997-02-01), Thommes
International Rectifier Company, "Semiconductor Databook" 1981/82m p. A-18.

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