Analysis on the Effect of Number of Poles and Thickness of Permanent Magnet in PMBLDC Motor

Abstract

The significance of permanent magnet brushless DC motors in various industrial applications has prompted researchers to optimize their design for superior efficiency. The paper proposes an optimized PMBLDC motor for 2000 rpm and 1.414A. The designed prototype values are simulated and analyzed using JMAG Designer and Express. The study compares the performance of the Arnold-NdFeB Magnet and the Hitachi Metals-NdFeB Magnet, considering the number of poles between 2 and 4, in terms of torque, flux density, efficiency, power factor, phase voltage, and magnetomotive force. The results demonstrate that the Hitachi Metals-NdFeB magnet, which has 6 slots, 4 poles, and 2 mm, is 13% more efficient than the 2 poles of Arnold-NdFeB magnet.