Auxiliary power supply control

Details Auxiliary power supply control Auxiliary power supply control

1996-11-15

1999-09-07

Paladini, Albert W.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

348730, 348734, H02J 906

Patent

active

059491540

ABSTRACT:
A control circuit is provided for an auxiliary power supply in an apparatus having run and standby modes of operation. The auxiliary power supply is energized by raw B.sup.+ voltage and operates in a switched mode, responsive to a feedback signal indicative of loading. A switching circuit, also energized by the raw B.sup.+ voltage, changes the auxiliary power supply between operational and non operational modes responsive to an on/off signal. The on/off signal is indicative of the run and standby modes of operation of the apparatus, for example a run supply voltage generated by another power supply in the apparatus. The switching circuit includes a switch optically coupled to a voltage threshold detector. The switch interrupts the feedback signal, for example by shunting to ground, in a manner which inhibits operation of the switching controller during the standby mode of operation of the apparatus.

REFERENCES:
patent: 4595977 (1986-06-01), Von Der Ohe
patent: 4788591 (1988-11-01), Decraemer
patent: 4937727 (1990-06-01), Leonardi
patent: 5017844 (1991-05-01), Lendaro
patent: 5270823 (1993-12-01), Heidebroek et al.
patent: 5621632 (1997-04-01), Hoh et al.

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