Electronic potentiometer simulator

Details Electronic potentiometer simulator Electronic potentiometer simulator

1984-11-16

1987-12-15

Shaw, Clifford C.

Electric heating

Metal heating

By arc

340347DA, B23K 910

Patent

active

047135212

ABSTRACT:
A welding power system is described wherein a programmable controller and a conventional power supply are coupled by a circuit which simulates a control potentiometer. The coupling circuit provides an adjustable output signal intermediate between high and low potentials depending upon the level of an input control signal. The coupling circuit converts the input control signal into a pulse width modulated signal, multiplexes the high and low potentials in accordance with the pulse width modulated signal, and time-averages the multiplexed signal to provide an output control signal. An optical isolator is preferably included for direct current isolation of the input and output signals.

REFERENCES:
patent: 4233591 (1980-11-01), Murata et al.
patent: 4521672 (1985-06-01), Fronius

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