Control of Brushless DC motors using sensorless Back-EMF integration method

This paper presents the Back Electromotive Force (Back-EMF) integration method, one of indirect BackEMF commutation methods, used to control the sensorless Brushless Direct Current (BLDC) motor. As its name indicates this technique is based on integration of the electrical Back-EMF signal to get instantaneous information about the mechanical rotor position, correspondingly the objective of this work is to control BLDC motor without using velocity and/or position sensors, just by integration of the Back-EMF signal of the non-fed phase's to determine the position of the commutation point in order to drive the inverter. Therefore, the proposed control technique is developed using MATLAB / Simulink with Simscape library. The effectiveness of the proposed technique has been validated by simulation results (c) 2021 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the Fourth edition of the International Conference on Materials & Environmental Science.21 Elsevier Ltd.