Circuit control to limit power drain of auxiliary power supply i

Details Circuit control to limit power drain of auxiliary power supply i Circuit control to limit power drain of auxiliary power supply i

1978-10-23

1980-12-23

Hix, L. T.

Electrical transmission or interconnection systems

Plural supply circuits or sources

One source floats across or compensates for other source

307 64, 328155, H02J 906

Patent

active

042412617

ABSTRACT:
An uninterruptible power supply includes a digital control circuit to control the transfer of power from a primary and a secondary power source to a load circuit to be energized. The digital control circuit controls through digital techniques the relative phase angles of a primary power signal, a secondary power signal, and a load signal to advantageously minimize the power drain on an idling secondary power source when the primary power source is active and to minimize transients in the load signal when converting from one power source to another.

REFERENCES:
patent: 3991319 (1976-11-01), Servos
patent: 4010381 (1977-03-01), Fickenscher
"High-speed Astable Ramp Generator," E. S. Hoyt, IBM Technical Disclosure Bulletin, vol. 19, No. 2, Jul. 1976, pp. 418-419.

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