Torque Ripple Effects According to Hysteresis Motor Closed-Slot Structures Geometry with Finite Element Analysis

FEA (Finite Element Analysis) of conventional hysteresis motors has been difficult due to the specificity of the rotor. Equivalent circuit-based analysis is common, and it is difficult to expect the torque ripple due to the slot structure. However, recent advances in FEM (Finite Element Method) technology have made it possible to consider the nonlinear characteristics of the rotor. By utilizing this, the torque ripple and torque depending on the stator bridge angle, which affects the torque ripple of the motor, were compared. This is expected to enable geometry optimization of hysteresis motors, which is difficult with conventional methods.