Phase distortion compensated time base for a welder control

Details Phase distortion compensated time base for a welder control Phase distortion compensated time base for a welder control

1997-05-30

1999-02-09

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219114, 323217, B23K 1124

Patent

active

058698000

ABSTRACT:
A phase controlled weld controller system provides a stable timebase phase reference which has improved transient response in the presence of spurious noise generated by other external equipment coupled to the same voltage source. The system estimates a phase error between an internal phase reference generator and the voltage source. The system also estimates the phase distortion generated by the weld control when operating with an inductive impedance load when significant line impedance is present. The weld controller provides compensation for the phase distortion in the timebase phase reference using the estimated line impedance to realize a phase reference which more accurately tracks the voltage source.

REFERENCES:
patent: 4289948 (1981-09-01), Jurek et al.
patent: 4301351 (1981-11-01), Mathews
patent: 4493040 (1985-01-01), Vanderhelst
patent: 4885451 (1989-12-01), Farrow et al.

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