Back EMF detection based sensorless speed control of brushless DC motor

Back EMF detection based sensorless speed control of brushless DC motor
Author(s):
Gerfin G R, T. Thirumoni, K. Suresh
Keywords:
Sensorless control, BLDC Motor, Back EMF detection, PI Controller.
Abstract
Brushless Direct Current (BLDC) motor is one of the recent and notable developments in the evolution of special electrical machines due to its outstanding performance, lesser noise and energy efficiency. However the speed control of this motor is still a concern due to the presence of hall sensor. This paper proposes a method to control the speed of sensorless BLDC motor by estimating the back emf to generate the required pulses for the three phase inverter that feeds the motor. A controlled voltage source acts as the main source which is controlled by an adaptive Proportional Integral controller which is tuned for better speed control of the BLDC motor. The proposed system is modeled and simulated in MATLAB/SIMULINK for all possible scenarios and the results are analyzed. The results show that the proposed work is excellent in sensorless speed control of BLDC motors under all possible operating conditions.
Article Details
Unique Paper ID: 163228 Publication Volume & Issue: Volume 0, Issue no Page(s): 45 - 50
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