Indian Journal of Science and Technology
Year: 2015, Volume: 8, Issue: 32, Pages: 1-5
T. Siva1 and Anith Sampathkumar2
1 Department of Electrical and Electronics Engineering, Jerusalem College of Engineering, Velachery Main Road, Narayanpuram, Pallikaranai, Chennai – 600100, Tamil Nadu, [email protected]
2 Department of Electrical and Electronics Engineering, Bharath University, 173, Agharam Road, Selaiyur, Chennai – 600073, Tamil Nadu, India; [email protected]
This paper proposes a modified Back-EMF Detection sensorless control scheme for Brushless DC motor drive system. Even though several methods are available for sensorless control, they are found to be unsuitable for closed loop systems controlled by Pulse Width Modulation (PWM) technique. The proposed is well suited for the systems controlled by pulse width modulation technique and can be easily realized through inexpensive PIC microcontrollers. The simulink model of the proposed system is developed using MATLAB to investigate the performance of the proposed sensorless control technique. In the proposed method, a speed dependent time delay unit is developed to produce virtual hall sensor signals. Simulation results are presented to validate the performance of the proposed sensorless control scheme for different reference speeds and load torques.
Keywords: Back-EMF Detection, Brushless DC Motor, MATLAB/Simulink, Speed Dependent Time Delay
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