Patent ID: 11929698
Assignee: SNAP-ON INCORPORATED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  G | IPC B  G  H

Claim 17:
18. A controller for controlling a brushless DC motor including switching elements, the controller comprising:
a processing unit adapted to:
perform a first short circuit check including:
activating a first switching element of the switching elements;
measuring a first current corresponding to the first switching element;
deactivating the first switching element;
indicating a first fault has occurred in one of the switching elements when the measured first current meets or exceeds a first threshold current;
activating a second switching element of the switching elements when the measured first current is less than the first threshold current;
measuring a second current corresponding to the second switching element;
deactivating the second switching element; and
indicating a second fault has occurred when the measured second current meets or exceeds the first threshold current.