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Speed Sensorless Induction Motor Drives for Electrical Actuators: Schemes, Trends and TradeoffsFor a decade, induction motor drive-based electrical actuators have been under investigation as potential replacement for the conventional hydraulic and pneumatic actuators in aircraft. Advantages of electric actuator include lower weight and size, reduced maintenance and operating costs, improved safety due to the elimination of hazardous fluids and high pressure hydraulic and pneumatic actuators, and increased efficiency. Recently, the emphasis of research on induction motor drives has been on sensorless vector control which eliminates flux and speed sensors mounted on the motor. Also, the development of effective speed and flux estimators has allowed good rotor flux-oriented (RFO) performance at all speeds except those close to zero. Sensorless control has improved the motor performance, compared to the Volts/Hertz (or constant flux) controls. This report evaluates documented schemes for speed sensorless drives, and discusses the trends and tradeoffs involved in selecting a particular scheme. These schemes combine the attributes of the direct and indirect field-oriented control (FOC) or use model adaptive reference systems (MRAS) with a speed-dependent current model for flux estimation which tracks the voltage model-based flux estimator. Many factors are important in comparing the effectiveness of a speed sensorless scheme. Among them are the wide speed range capability, motor parameter insensitivity and noise reduction. Although a number of schemes have been proposed for solving the speed estimation, zero-speed FOC with robustness against parameter variations still remains an area of research for speed sensorless control.
Document ID
19970026120
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Elbuluk, Malik E. (Akron Univ. Akron, OH United States)
Kankam, M. David (NASA Lewis Research Center Cleveland, OH United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1997
Subject Category
Aircraft Stability And Control
Report/Patent Number
E-10752
NASA-TM-107466
NAS 1.15:107466
Report Number: E-10752
Report Number: NASA-TM-107466
Report Number: NAS 1.15:107466
Meeting Information
Meeting: National Aerospace and Electronics
Location: Dayton, OH
Country: United States
Start Date: July 14, 1997
End Date: July 18, 1997
Sponsors: Institute of Electrical and Electronics Engineers, Department of the Air Force
Accession Number
97N25468
Funding Number(s)
PROJECT: RTOP 233-1A-1C
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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