Novel Vector Control Approach for Switched Reluctance Machines Based on Non-Sinusoidal dq Transform

This paper presents a torque ripple minimization strategy based on Field Oriented Control for Switched Reluctance Machines. The proposed strategy lay hands on a non-sinusoidal dq transform, known as the dqx transform, and the derivatives of inductance as main variables. The proposed method has been validated through time-step simulations of a 6/4 machine in Matlab/Simulink. The inductance and its derivative waveform have been obtained through Finite Element Analysis of a real machine. The simulations have taken into account the magnetic saturation effects and cross-coupling effects. Results for speed variation through flux weakening/enhancement have also been presented and discussed. The results demonstrate the efficacy of the proposed method, decreasing the torque ripple by 2.9 times of its original value when saturation effects are neglected and by 2.8 times when saturation effects are considered. In addition, the base speed has been increased up to 19.22% when flux-weakening and flux enhancement simulations have been carried out.