Electronic device for controlling and monitoring the electrical

Details Electronic device for controlling and monitoring the electrical Electronic device for controlling and monitoring the electrical

1991-12-24

1993-08-17

Stephan, Steven L.

Electric heating

Metal heating

For bonding with pressure

B23K 1124

Patent

active

052371476

ABSTRACT:
An electronic device for controlling and monitoring the electric power supply to welding equipment includes an inverter driven by a rectifier that supplies voltage to the primary winding of a welding transformer. A secondary winding of the welding transformer delivers welding current that is a function of the voltage applied to the primary winding. The inverter is also interlocked to and piloted by a regulator in such a way that an essentially square wave voltage signal appears with a succession of paired pulses in each half-period of the fundamental frequency, alternately positive and negative and of a given absolute crest value and finite spacing. A periodic welding current is produced of which the pulses are triangular, all positive or negative within the same half-period, and geared to rise and fall once during each cycle of two paired alternating voltage pulses, such that fundamental frequencies can be reduced without loss of operating speed.

REFERENCES:
patent: 4192987 (1980-03-01), Kawano
patent: 4503316 (1985-03-01), Murase et al.
patent: 4554430 (1985-11-01), Belamaric
patent: 4654503 (1987-03-01), Tajiri
patent: 4675494 (1987-06-01), Dilay
patent: 4721841 (1988-01-01), Pazzaglia et al.
patent: 4973815 (1990-11-01), Ito et al.
patent: 5045658 (1991-09-01), Smith

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