Estimation of Magnetization Distribution in Permanent Magnet of Brushless DC Motor

Abstract

This paper proposes a method to estimate the magnetization distribution in permanent magnet of a Brushless DC motor when the excitation voltage of a magnetizer is changed. First, we show from the experimental results that there is an optimal excitation voltage to reduce the cogging torque of the motor. Next, we show that it is possible to estimate the magnetization distribution in the permanent magnet by using the measured flux density distribution and cogging torque.

Lumped-Parameter Network Thermal Analysis of Permanent Magnet Synchronous Motor

“…The specific FE package has been assembled for the 3D FE transient and steady state analysis of actuators. It consists of seven codes and integrates numerical techniques for the minimization of the computational cost [10]- [13].…”