Implementation of Position Sensorless Brushless DC Motor Drive

This proposed work shows the Position sensorless operation of BLDC motor. Deriving the commutation instant is important part of the Brushless DC motor drive. Since the commutation instants are important factor regarding control of BLDC motor drive. Here in this paper simulation is done for BLDC motor speed control, based on finding out zero crossing from the terminal voltages difference. Sample and hold block is used for eliminating the spikes in the waveform. sensorless operation is Simulink using MATLAB 2016a software and effectiveness of the method is verified by the real time implementing hardware.