Comparative study of different control algorithms on Brushless DC motors

摘要

Recently, the role of a BLDC (Brushless Direct Current) motor is favoring the designers due to its higher efficiency. Most of the applications are already using BLDC motors as a replacement for AC motors and this holds true for innumerous applications, and these motors also reduce the overall system weight. The commutation of BLDC motor is done electronically; hence it is quite simple to control the torque and RPM of the motor even at much higher speed. This paper gives a brief comparative study of three different control schemes i.e Sinusoidal field oriented control (FOC), Field oriented control (FOC), Hysteresis control of a BLDC motor primarily on the aspect of output torque ripple. The study of all the three control schemes is discussed briefly and simulation of control algorithm has been performed.