Patent ID: 9048767
Filing Date: 2015-06-02
Classification: H02P

Abstract:
1. A pulse-width modulation (PWM) inverter controller for controlling operation of a PWM inverter connected to drive a permanent magnet (PM) motor, the PWM inverter controller comprising: a field-oriented controller (FOC) that monitors output currents provided by the PWM inverter to the PM motor, the FOC employing the monitored output currents in a current loop feedback that generates control signals; a harmonic compensator that transforms monitored phase currents into modified rectangular waveforms having magnitudes modified based on detected harmonics within the monitored phase currents to generate compensation signals, wherein the compensation signals generated by the harmonic compensator are summed with the control signals generated by the FOC to generate compensated control signals, and wherein the harmonic compensator comprises: a PWM signal generator that generates PWM signals for controlling the PWM inverter based on the compensated control signals.