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Implementation of generic sensorless direct field oriented control of AC motors on a low-cost, fixed-point digital signal processor

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3 Author(s)
Konghirun, M. ; Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA ; Longya Xu ; Figoli, D.

This paper presents an implementation of low cost, generic sensorless direct field oriented (GSDFO) control algorithm applicable to both induction (IM) and permanent-magnet synchronous motors (PMSM). The proposed algorithms are simple but maintain good performance over a normal speed operation. The stator flux is derived based upon the improved integration of back electromotive force (EMF), effective over a wide range of speed. The synchronous speed is simply calculated from the back EMF and stator flux whereas a slip is computed for IM additionally. The overall system is implemented in a TMS320LF2407EVM based controller for low cost. Experimental results are presented to verify the proposed algorithm

Published in:

Applied Power Electronics Conference and Exposition, 2002. APEC 2002. Seventeenth Annual IEEE  (Volume:1 )

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