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

Claim 7:
8. An electrical system, comprising:
a DC power source electrically connected to a power inverter via a high-voltage electrical bus;
an accessory power module electrically coupled to high voltage input filter downstream of a high-voltage bus; and
an overvoltage shutdown system including a peak detector coupled to the high voltage input filter downstream from the high-voltage bus, a comparator, and a controller;
wherein the accessory power module includes a DC-to-DC electric power converter having 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 of the high-voltage bus;
wherein the accessory power module is coupled to a low-voltage electric power bus;
wherein the controller is in communication with the peak detector and is 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 on the high-voltage bus multiplied by an AC gain of the high voltage input filter;
compare, via the comparator, the voltage on the high-voltage bus multiplied by the AC gain of the high voltage input filter with a maximum threshold voltage; and
disable the plurality of primary power switches when the monitored voltage of the high-voltage bus is greater than the maximum threshold voltage.