Speed control of BLDC motors using hall effect sensors based on DSP

Most of the electrical systems today required higher performance on efficiency and lower carbon dioxide consumption. Brushless DC (BLDC) motors can achieve these specifications because the high efficiency in comparison with traditional AC induction motor, and purely powered by electricity. In this paper, a speed control scheme of BLDC using Hall effect sensors is proposed. Hall effect sensors detect the rotor position and drive the motor. The driving technique is trapezoidal pulse-width-modulation (PWM) wave which called trapezoidal control. The rotation speed control is constituted with the Proportional-Integral (PI) controller. Some experiments are presented to illustrate the motor speed with PI control is more stable and more accurate than the control without PI control.