Patent ID: 11904726
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. An accessory power system electrically coupled to a high voltage input filter downstream from a high-voltage bus, comprising:
an accessory power module, including a plurality of primary power switches, a transformer, and a plurality of secondary rectifiers; wherein the plurality of primary power switches are electrically connected to the high voltage input filter downstream from the high-voltage bus, and wherein the plurality of secondary rectifiers are electrically connected to a low-voltage output filter downstream from a low-voltage bus;
a peak detector coupled to the high voltage input filter downstream from the high-voltage bus; and
a controller, in communication with the peak detector, and operatively connected to the plurality of primary power switches;
the controller including an instruction set that is executable to:
dynamically monitor, via the peak detector, a ripple voltage of the high-voltage bus multiplied by an AC gain of the high voltage input filter;
compare the monitored voltage with a maximum threshold voltage;
disable the plurality of primary power switches when the monitored voltage is greater than the maximum threshold voltage; and
reactivate the plurality of primary power switches when the monitored voltage is less than the maximum threshold voltage.