LINE TO LINE VOLTAGE BASED SENSORLESS CONTROL FOR HIGH SPEED BLDC MOTOR
This paper introduce a novel line to line voltage based sensorless control method for Brushless DC motor drive used in high speed, high power applications. The commutation signals for the six switch inverter are generated from the line to line voltage. In each phase commutation, two switches conduct corresponding to the truth table logic. Delay occurring in speed is compensated by the new compensation method. Selection of commutation logic in a parallel mode improves the efficiency of system by reducing the operation delay. Compared with the existing control methods the torque and current ripple of BLDC motor can be significantly reduced by using this proposed method. The whole system is evaluated in MATLAB- Simulink platform.
BLDC motor Control algorithm for industrial applications using a general purpose processor, J. Power Electron., vol. 7, no. 2, pp. 132139, Apr. 2007.
 Geethu Zacharia, Annai Raina,”A Survey on Back EMF Sensing Methods for Sensorless Brushless DC Motor Drives”, international journal of emerging trends in engineering research, volume 2, no.2, February 2014.
 E.Sumathi1, M.Santhosh Sheela and B.Arunkumar,”Advanced Sensorless Control of Brushless DC Motor using Terminal Voltage Sensing Method”, International Journal of Computer Sciences and Engineering Open Access Research Paper Volume-2, Issue-5, 2014.
 Ashish P.R, Vincent G, ”Sensorless Control of BLDC Motor Using Third Harmonic Back EMF”, International Journal of Industrial Electronics and Electrical Engineering, ISSN: 2347-6982 Volume- 2, Issue- 1, Jan.-2014.
 Neha gupta, A.K Pandey,”A review: Sensorless Control of BLDC Motor”, International Journal of Engineering Research and Technology, vol. Issue 6, August 2012.
 Merin John1, Vinu Thomas” Modelling, Analysis and Simulation of Sensorless Control of Brushless DC
Motor Based On BEMF Difference Estimation Method,” International Journal of Advanced Research in Electrical, Electronics and Instrumentation EngineeringVol.2, Issue 6, June 2013  C.-H. Chen and M.-Y. Cheng,” A new cost effective sensorless commutation method for brushless dc motors without phase shift circuit and neutral voltage”, IEEE Trans. Power Electron., vol. 22, no. 2,pp. 647650, Mar.2007.
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