Simple non-linear magnetic analysis-based optimum design of three-phase hybrid stepping motors

In this paper, a simple non-linear magnetic analysis-based optimum design of three-phase HBM is presented. The aim of optimum design is to minimize the magnet volume of the motor, keeping torque/current ratio at the desired value. At first, the validity of the proposed analysis is examined for the various design free parameters. After verifying the accuracy of the torque computation of the proposed analysis through the comparisons with 3D-FEA, 400W hybrid stepping motor is optimally designed. Comparing with the traditional 3D-FEA, the design method proposed here has the same accuracy, while the computation time is as short as 1/460000.