Delayed power supply overvoltage shutdown apparatus

Details Delayed power supply overvoltage shutdown apparatus Delayed power supply overvoltage shutdown apparatus

1990-04-12

1991-07-02

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

323284, 361 18, 361 91, 363 56, H02H 712, H02M 3335

Patent

active

050292692

ABSTRACT:
A pulse-width modulated DC-DC power supply is illustrated with overvoltage protection which upon initial detection momentarily shuts down the pulse-width modulating portion of the control loop for a given cycle. If the overvoltage condition persists for more than a prescribed number of cycles or amount of time, the power supply is shut down permanently. The delay between momentary and permanent shut down being used to allow system operation to be maintained with minimal damage (voltage induced load stress) where large voltage transients may be temporarily introduced into the system.

REFERENCES:
patent: 3816809 (1974-06-01), Kuster
patent: 4405964 (1983-09-01), Woods et al.
patent: 4464709 (1984-08-01), Barter
patent: 4739462 (1988-04-01), Farnsworth et al.

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