Electricity: power supply or regulation systems – Output level responsive – Using a transformer or inductor as the final control device
Patent
1980-04-30
1982-08-24
Shoop, William M.
Electricity: power supply or regulation systems
Output level responsive
Using a transformer or inductor as the final control device
323250, 323302, 323362, G05F 500
Patent
active
043463401
ABSTRACT:
In a method for the enhancement of the A.C. performance of an inductor such as a transformer or choke, the tendency of the core of the inductor to become saturated by flux arising from low frequency A.C. or D.C. currents flowing in the inductor winding is reduced by detecting the magnitude of such currents and applying to a control winding wound on the core of the inductor a compensating current in order to generate a magnetic flux in the core of the inductor which opposes the component of flux tending to cause saturation. An inductor to which the method may be applied may accordingly comprise a main winding, a magnetic core, a control winding, means for sensing the presence in said main winding of a current having a frequency below a predetermined limit, and means for applying to said control winding a control circuit tending to balance the flux generated by the sensed current.
REFERENCES:
patent: 2736822 (1956-02-01), Dunlap, Jr.
patent: 2780772 (1957-02-01), Lee
patent: 2979668 (1961-04-01), Dunlap, Jr.
patent: 2998564 (1961-08-01), Lawrence, Jr.
patent: 4152637 (1979-05-01), Oberbeck et al.
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