Abstract
AbstractIn this paper, a second-order generalized integrator (SOGI)-based proportional-resonant (PR) current controller is proposed to minimize the torque ripple in switched reluctance motor (SRM) drives. The reference current for each phase of SRM is generated based on smooth torque sharing functions (TSFs). The TSF is dependent upon turn-on angle, turn-off angle, overlap angle, and demand torque. The SOGI-based PR current controller is implemented to track the reference current. Ideally, the SOGI-PR controller has an infinite gain at a resonant frequency, which should be the same as the frequency of the reference current which changes with the rotor position. The short-time Fourier transform (STFT) is employed to determine the frequency of reference current which varies with the rotor position. The simulation study on a 3-phase, 1-hp SRM shows efficient tracking performance by the proposed current controller to reduce the torque ripple.KeywordsSecond-order generalized integrator (SOGI)Short-time Fourier transforms (STFT)Torque sharing function (TSF)
Published Version
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