| Title |
Performance Improvement of BLDC Motor Speed Control Using Hybrid PWM Method |
| Authors |
이동훈 ; 오태석 ; 전성구 ; 김일환 ; 남부희 |
| Keywords |
Brushless DC Motor ; Unipolar PWM ; Bipolar PWM ; Hybrid PWM ; Speed Contr |
| Abstract |
This paper considers a hybrid PWM(pulse width modulation) method which can be used in the brushless DC motor controller. Due to many disadvantages of bipolar PWM method, unipolar PWM method is mostly used in industrial field. In constant speed control application, the unipolar PWM method shows the good performance of speed control. But in the wide range of speed control application, it shows poor performance especially when deceleration is needed. So we propose the hybrid PWM method that utilizes both of bipolar and unipolar PWM methods according to the sign of the speed controller output. Simulation and experimental result show that the proposed method improves speed control performance of the brushless DC motor which is applied to the industrial sewing machines. |