Abstract
This paper presents a method for torque ripple, acoustic noise and vibrations reduction in three-phase permanent magnet (PM) motors. Field oriented control (FOC) has been extended by compensation voltage in q-axis to minimize the ripple in angular velocity. Amplitude and phase of injected q-axis voltage harmonic are adjusted online by least mean squares (LMS) learning rule, based on the ripple in angular velocity. Proposed method significantly reduces impact of cogging torque and non-sinusoidal Back-EMF voltage on produced torque ripple, acoustic noise and vibrations. Effectiveness of proposed algorithm is experimentally verified by sound FFT analysis. Conventional techniques require a map of the cogging torque and Back-EMF shapes, while proposed method calculates the compensation q-axis voltage directly out of the ripple in angular velocity, which is great advantage in comparison to conventional methods.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
