Main Article Content
Brushless DC motor (BLDCM) is driven by 120 degree square wave voltage and use PWM pulse patterns in two-phase feeding scheme to control the speed. In this paper, we propose the computational method for the BLDCM, which is driven by four PWM modes using time-stepped voltage source finite element method. And then we investigate motor characteristics at each PWM modes. According to a comparison based on each analysis result, we select a better PWM mode in the motor characteristics aspect. We also show that the proposed analysis method is appropriate to analyze a BLDC motor by comparing experimental results.