Patent ID: 8884562
Filing Date: 2014-11-11
Classification: H02P

Abstract:
1. An apparatus comprising: an H-bridge configured to couple a direct current power source to windings of a motor, wherein the H-bridge comprises a plurality of switches; and a motor controller configured to: close one of the plurality of switches and only the one of the plurality of switches in a first duty cycle to put the H-bridge in a coast configuration, wherein the windings are short circuited, identify a desired direction for a current impulse to the windings, open the one of the plurality of switches and only the one of the plurality of switches in a second duty cycle in response to identifying a first desired direction for the current impulse to provide the current impulse in the first desired direction and only the first desired direction to the windings, and close another of the plurality of switches and only the another of the plurality of switches in a third duty cycle in response to identifying a second desired direction for the current impulse to provide the current impulse in the second desired direction and only the second desired direction to the windings, wherein: