System for calculating the root mean square (RMS) current in a r

Details System for calculating the root mean square (RMS) current in a r System for calculating the root mean square (RMS) current in a r

1983-03-14

1985-05-07

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219110, 324132, B23K 1124

Patent

active

045160082

ABSTRACT:
A system is provided for use in a microprocessor controlled controller for a resistance welding machine for calculating the RMS value of the welding current so as to provide a closed loop control of the RMS current in order to eliminate the effect of variations in load and line voltage on the welding current and to provide a constant welding tip temperature in the presence of such variations.

REFERENCES:
patent: 4076974 (1978-02-01), Gee
patent: 4245183 (1981-01-01), Glennon
patent: 4301351 (1981-11-01), Mathews
patent: 4346346 (1982-08-01), Silberberg
patent: 4456809 (1984-06-01), Jones et al.

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