Publication: Speed control of permanent magnet brushless direct current motor using six switch three phase inverter
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Date
2024-08
Authors
Aidil Danial bin Azahar
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Abstract
Permanent Magnet Brushless Direct Current (PMBLDC) motors are widely used in industrial and aerospace applications due to their excellent dynamic response,
long operating life, high efficiency, and wide speed range. This project aims to develop a simulation model of a PMBLDC motor using a Proportional-Integral-Derivative (PID) controller on the MATLAB-Simulink platform. The objective is to evaluate the motor's performance in terms of speed control, operating speed range, and load variations. The study employs two control methods, which are PWM (single-loop) for regulating voltage or current within the desired speed range, and Hysteresis current control (double-loop) to minimize current ripple, thereby reducing torque ripple. The motor used is an eight-pole, three-phase PMBLDC motor. The performance and response of the motor are tested and analysed at speed reference 750 rpm under varying loads, no load, 4 Nm (half load), and 8 Nm (full load). The speed responses of the double-loop system with PI and PID controllers are compared, also, the response of double-loop with PID controller are evaluated at fixed load with different speed references at 100 rpm, 250 rpm, 500 rpm and 750 rpm, demonstrating the effectiveness of the PID controller in achieving superior performance and stability across different operating conditions. The results indicate shows good outcomes for the application of these control strategies in enhancing PMBLDC motor performance.