Abstract:
Closed loop variable speed operation of a Permanent Magnet Brushless DC(PMBLDC) motor drive covering transient and steady state running conditions has been investigated by experimental work. The motor operates as a prime mover coupled to a dc generator and the entire drive is modeled using a set of electromechanical equations. Hardware implementation of the closed loop system is done using TMS320LF2407A based DSP controller and an intelligent power module covering speed and current feedback and the drive performance results are presented. The control algorithm combines the Space Vector PWM switching requirements and Predictive Current principle. The results confirm the real-time capability of the controller and associated DSP program in a practical operational environment.

Keywords: Closed loop operation, PMBLDC Motor, Predictive current control, Real time DSP Controller, Space vector PWM