Speed and torque controls of brushless direct current motor

Muhammad Adib , Md Rohim (2014) Speed and torque controls of brushless direct current motor. Project Report. UTeM. (Submitted)

Text SPEED AND TORQUE CONTROLS OF BRUSHLESS DC MOTOR 24pages.pdf Download (610kB)

Abstract

This project presents the Speed and Torque Controls of Brushless Direct Current (BLDC) motor. Due to the drawbacks of conventional Direct Current (DC) machines which are Brush Direct Current (BDC) motor, the use of BLDC motor is proposed because of its advantageous compared to BDC motor. Even if compared to other machines in industrial, BLDC motor still possessed better performances in term of its control simplicity, high torque density, and lower maintenance. The proposed Speed and Torque Controls is implemented by restrain the current and torque within predefined band gap and also closed loop speed controller by varying the Proportional (Kp) and Integral (Ki) gains. By applying this concept, it required one current loop for the hysteresis to take place but the benefit of this method is that it can force the torque ripple to shut within the band gap. Next, the dynamic response of the Torque Hysteresis Control for BLDC scheme is modelled by proportional integral speed controller. A proper selection of Kp and Ki gains will determine the dynamic response of BLDC drive. Thus, in order to realize the project, a simulation were carried out using MATLAB/SIMULINK and sim-power system blockset simulation. Then, for the experimental, the control system was using the dSPACE in the iDRIVE driver kit. Lastly, based on the results obtained, it is proven that this scheme has good controlling mechanism and suitable for BLDC motor drive. Besides, the implementation of both PI controller and Torque Hysteresis Controller also gives excellent performance for the BLDC motor.

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