Permanent Magnet Synchronous Motor Drive Using Hybrid PI Speed Controller With Inherent and Noninherent Switching Functions Amit Vilas Sant, K. R. Rajagopal, and Nimit K. Sheth Indian Institute of Technology Delhi, New Delhi , India Magnequench Neo Powders Pte. Ltd., Singapore, 研究生：劉適存 學號： MA Department of Electrical Engineering Southern Taiwan University of Science and Technology

2 Abstract The performance of the fuzzy logic controller (FLC) is better under transient conditions, while that of the proportional plus integral (PI) controller is superior near the steady-state condition. The combined advantages of these two controllers can be obtained with hybrid fuzzy-PI speed controller. The computations involved with the FLC are much higher as compared to that of the PI controller.

3 Schematic diagram of the HPI speed controller with switching function.

4 speed controller output

5 speed controller output-2

6 speed controller output-3

7 speed controller output-4

8 speed controller output-5

9 speed controller output-6

10 Experimentally measured spee-1

11 Experimentally measured spee-2

12 PERFORMANCE COMPARISON OF THE VECTOR-CONTROLLED PMSM DRIVE WITH THE HPI SPEED CONTROLLER

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