Patent ID: 11949224
Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A method for detecting a persistent overvoltage fault in a power supply system, the method comprising:
detecting an overvoltage condition associated with an output voltage provided from a power regulator operating in voltage-limit mode;
generating an overvoltage signal in response to the overvoltage condition;
initiating a latch-off timer in response to the overvoltage signal, the latch-off timer being uninterrupted by an amplitude of the output voltage;
determining the persistent overvoltage fault in response to the overvoltage signal after expiration of the latch-off timer;
generating a fault signal to disable the voltage-limit power regulator in response to detecting the persistent overvoltage fault; and
detecting a nuisance overvoltage condition in response to not detecting the overvoltage condition after expiration of the latch-off timer and before expiration of a nuisance overvoltage timer.