Examination of non-sinusoidal drive in Direct Current excited Reluctance motor

In the paper, non-sinusoidal drive method for Direct Current excited Reluctance Motor (DCRM) is proposed. The non-sinusoidal current waveform is defined by a function of Fourier series and the optimum coefficients of the current function are solved by nonlinear programming. It is confirmed that the average torque of a DCRM driven by optimized non-sinusoidal current waveform is improved by simulation results. In addition, for non-sinusoidal drive, the current balance between armature coil and excitation coil is examined.