Power supply system with parallel regulators and keep-alive circ

Details Power supply system with parallel regulators and keep-alive circ Power supply system with parallel regulators and keep-alive circ

1976-12-01

1978-02-14

Pellinen, A. D.

Electricity: power supply or regulation systems

Remote sensing

307 82, 323DIG1, G05F 156, G05F 158

Patent

active

040741826

ABSTRACT:
A dc power supply system comprising two or more voltage regulator units connected in parallel to a common load, there being at least one more regulator unit provided than is required to meet the rated load current requirement. The spare or redundant regulator assumes the load automatically if another regulator fails, and does so in a manner such that it does not interfere with operation of other regulators when they are operating normally and such that its own operation is not affected by the others in the event of their failure. To these ends the power supplies include a decoupling network which is associated with each of the regulators and which operates to prevent any reverse flow of current to that regulator, thus isolating it in the event of its failure, and they include also keep-alive circuitry which forces the redundant or spare power supply to produce an output at all times, to thus enhance its capability to pick up the load instantaneously and with minimized transient in load voltage should one of the other regulators fail.

REFERENCES:
patent: 3549977 (1970-12-01), Watkins
patent: 3808452 (1974-04-01), Hutchinson
patent: 3824450 (1974-07-01), Johnson et al.
patent: 3890559 (1975-06-01), Kuster
patent: 4013938 (1977-03-01), McCoy
patent: 4035716 (1977-07-01), Hutchinson
Comins, "Adding a Backup Supply Doesn't Ensure a Redundant Power System", Engineering Design News (EDN), Oct. 5, 1975, pp. 36-40.

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