Fuzzy Logic Based Gain Scheduled PI Speed Controller for PMBLDC Motor

The fixed gain PI speed controller has the limitations of being suitable for a limited operating range around the operating point and having inherent overshoot. The present fuzzy based gain scheduled PI speed controller eliminates these problems by enabling online tuning of the controller gains depending on the operating point. The paper describes the application of a fuzzy gain scheduling algorithm for the PI type controller for the speed control of a PMBLDC motor. The controller has been implemented on a TMS320F2812 DSP for a 100 W PMBLDC motor and shows superior dynamic and steady state performance as compared to a conventional PI type controller.