Patent ID: 8963453
Filing Date: 2015-02-24
Classification: H02M,H02P

Abstract:
1. A system for controlling a motor, the system comprising: a motor drive; and a controller external to the motor drive and configured to generate a periodic synchronizing signal at a defined interval, wherein the motor drive includes: a direct current (DC) bus having a positive terminal and a negative terminal; a plurality of switches selectively connecting the positive terminal and the negative terminal to at least one output terminal, each switch responsive to a corresponding switching signal; an input configured to receive the periodic synchronizing signal from the controller; a memory device storing a plurality of processor executable instructions; and a processor in communication with the memory device and operable to execute the instructions to: generate a carrier signal for a modulation routine at a first periodic interval, generate the switching signals as a function of the carrier signal and of a voltage reference signal within the first periodic interval, and at a second periodic interval, temporally align a selectable point on the carrier signal with the synchronizing signal.