Title :
A general algorithm for speed and position estimation of AC motors
Author :
Harnefors, Lennart ; Nee, Hans-Peter
Author_Institution :
Dept. of Electr. Eng., Malardalen Univ., Vasteras, Sweden
fDate :
2/1/2000 12:00:00 AM
Abstract :
A computationally efficient speed and position estimation algorithm, generally applicable to AC motor drives, is designed and analyzed. Applications include: (a) sensorless permanent-magnet and reluctance synchronous motor drives using the fundamental excitation as information source; (b) sensorless drives using saliency and signal injection; and (c) sensored drives using resolvers. Particular attention is given for case (a). Low parameter sensitivity in the entire speed range (except at low speeds for the reluctance motor)-implying a small position estimation error-and good dynamic properties at nominal speeds are verified
Keywords :
AC motor drives; control system analysis; control system synthesis; machine control; machine theory; parameter estimation; position control; velocity control; AC motor drives; dynamic properties; estimation error; fundamental excitation; parameter estimation algorithm; parameter sensitivity; position estimation; reluctance synchronous motor drives; resolvers; saliency; sensorless drives; sensorless permanent-magnet motor drives; signal injection; speed estimation; speed range; AC motors; Algorithm design and analysis; Estimation error; Inverters; Phase locked loops; Power engineering and energy; Sensorless control; Signal resolution; Synchronous motors; Voltage;
Journal_Title :
Industrial Electronics, IEEE Transactions on
