Patent ID: 9035584
Filing Date: 2015-05-19
Classification: B60L,H02M,H02P,Y02T

Abstract:
1. An apparatus comprising: a motor comprising windings and a rotor; a switch bridge configured to couple a direct current power source to the windings via a plurality of switches; a feedback controller configured to generate an output relative to a difference between a desired current in the windings indicated by a current command and an actual current in the windings identified by current feedback; a switch controller configured to control the plurality of switches in response to the output from the feedback controller to control the actual current in the windings; and a quadrant change controller configured to identify a first quadrant change in an operation of the motor and to select first selected ones of the plurality of switches to be controlled by the switch controller to change a direction of the actual current in the windings in response to identifying the first quadrant change.