Patent ID: 8829846
Filing Date: 2014-09-09
Classification: H02P

Abstract:
1. An apparatus comprising: an inverter; a motor that is coupled to the inverter; a shunt that is coupled to the inverter; a voltage generator that generates a voltage signal from a reference signal; an integrator that generates an angle signal from the reference signal; a feedback loop that is coupled to the shunt, wherein the feedback loop is configured to measure a motor current from the shunt, to determine direct-axis and quadrant-axis currents from the motor current and the commanded angle signal, and to generate a control signal; a first adder that adds the voltage signal to the control signal; a second adder that subtracts the control signal from the commanded angle signal; and a PWM controller that is coupled to the inverter and that generates a plurality of PWM signals in response to outputs from the first and second adders.