Effect of magnetization direction on iron loss characteristic in brushless DC motor

In this paper, we introduce two kinds of magnetization type, and investigate the effect of its direction on the iron loss in brushless DC (BLDC) motor using a 2-D time-stepped voltage source finite-element method (FEM). The iron losses consist of hysteresis and eddy current loss is calculated from the time variation of the magnetic field distribution. As a result, the magnetization direction that is more advantageous in terms of the iron loss characteristic of the BLDCM is suggested.