Online Torque Compensation-Based DC-Biased Sinusoidal Excitation for Switched Reluctance Motors With Torque Ripple Minimization

This paper proposes an online torque compensation-based DC-biased sinusoidal excitation scheme for switched reluctance motors (SRMs) with torque ripple minimization capability. Firstly, the instantaneous torque model is deeply analyzed in the DC-biased sinusoidal current-excited SRM drive by fully considering the harmonic components of phase inductance. Secondly, the specific zero-sequence current constituents are complemented into the phase windings to compensate the specific alternative torque components, and the magnitude of biased DC current is determined by the extreme point determination method. Thirdly, considering the inevitable modeling error, the online torque compensation is proposed to smooth the torque ripple in the featured positions. Finally, the effectiveness of the proposed scheme is verified in MATLAB/Simulink based on a three-phase 12/8-pole SRM prototype.