Current monitoring/control circuit

Details Current monitoring/control circuit Current monitoring/control circuit

2005-07-05

2005-07-05

Nguyen, Vinh (Department: 2829)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Magnetic saturation

C324S126000

Reexamination Certificate

active

06914422

ABSTRACT:
A current control that employs a magnetic amplifier and an active feedback circuit. The feedback circuit establishes the effective operating current of the amplifier at a fixed point. The magnetic amplifier includes a pair of oppositely wound gate windings, a bias winding and a control winding. The gate windings are driven by an oscillator driver that generates a gate winding current and a gate winding voltage. A reference voltage and the gate winding voltage are applied to a feedback amplifier and the feedback circuit. When the gate winding voltage becomes equal to the reference voltage, the feedback circuit is stable and the gate winding current is set to a desired zero current operating point.

REFERENCES:
patent: 3651393 (1972-03-01), Pohm
patent: 3801907 (1974-04-01), Lilienstein
patent: 4005352 (1977-01-01), Kugler et al.
patent: 4286211 (1981-08-01), Nakamura et al.
patent: 4298838 (1981-11-01), Akamatsu et al.
patent: 4823074 (1989-04-01), McLyman
patent: 4914381 (1990-04-01), Narod
patent: 5508606 (1996-04-01), Ryczek
patent: 763576 (1967-07-01), None

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