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

Volume

47

Issue

1

fYear

2000

fDate

2/1/2000 12:00:00 AM

Firstpage

77

Lastpage

83

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;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/41.824128

Filename

824128