A NOVEL SWITCHING PATTERN CONTROL FOR SENSOR AND SENSOR LESS BASED FOUR SWITCH INVERTER FED PMBLDC DRIVE

摘要

Brushless DC (BLDC) motor is attracting much interest due to its high efficiency, good performance and ease of control for many applications. Moreover, reducing of the drive components is more attractive for low cost applications. The paper presents a comparative study between sensor and sensor less control of four-switch Inverter fed PMBLDC (BLDC) motor drive which is suitable for low cost application. The conventional techniques for controlling the phase current in a FSTPI brushless DC drive are practically effective in low speed and cannot reduce the commutation torque ripple in high speed range. For effective utilization of the developed system, a novel direct current controlled PWM scheme is designed and implemented to produce the desired dynamic and static speed-torque characteristics. The simulation results are obtained using MATLAB/SIMULINK software.