FEM analysis and control of a tapered airgap single phase PMSM

The present paper investigates by FEM, on a case study, the gradual airgap surface PM single phase synchronous motor to obtain a good compromise between starting torque, average torque and torque ripple. Then, based on a dynamic circuit model, the torque pulsations with trapezoidal current control is explored through digital simulations with about 80%( from average rated torque) initial self-starting torque.