Development of brushless DC motor drive system for teaching purposes using various PWM control techniques for speed control

In this paper, a test bench was developed for teaching purposes to enhance power electronics and real time control of Brushless DC motor comprehensively particularly with regard to PWM techniques signal generation and speed control theoretically and experimentally using Matlab /Simulink environment, assisted with DSP programming kit in practice. First a model was developed under Matlab Simulink. The control strategies implemented involves two PWM techniques, namely soft and hard switching. The system is built in a way that the students are able to carry out modeling and confirm their results through the testing bench using these techniques. The approach used has been effective in the way it has led to the student satisfaction. It has shown their learning has been improved with regard to the drive control applications either as a variable speed drive or in embedded systems.