MRAS Based Speed Estimator for Sensorless Vector Control of a Linear Induction Motor with Improved Adaptation Mechanisms

Mohammad Hosein Holakooie; Asghar Taheri; Mohammad Bagher Bannae Sharifian

MRAS Based Speed Estimator for Sensorless Vector Control of a Linear Induction Motor with Improved Adaptation Mechanisms

Mohammad Hosein Holakooie

Asghar Taheri

Mohammad Bagher Bannae Sharifian

Vol. 15, No. 5, pp. 1274-1285, Sep. 2015

10.6113/JPE.2015.15.5.1274

Adaptation mechanism

Fuzzy controller

Linear induction motor (LIM)

Mechanical model

Model reference adaptive system (MRAS)

Vector control

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Abstract

This paper deals with model reference adaptive system (MRAS) speed estimators based on a secondary flux for linear induction motors (LIMs). The operation of these estimators significantly depends on an adaptation mechanism. Fixed-gain PI controller is the most common adaptation mechanism that may fail to estimate the speed correctly in different conditions, such as variation in machine parameters and noisy environment. Two adaptation mechanisms are proposed to improve LIM drive system performance, particularly at very low speed. The first adaptation mechanism is based on fuzzy theory, and the second is obtained from an LIM mechanical model. Compared with a conventional PI controller, the proposed adaptation mechanisms have low sensitivity to both variations of machine parameters and noise. The optimum parameters of adaptation mechanisms are tuned using an offline method through chaotic optimization algorithm (COA) because no design criterion is given to provide these values. The efficiency of MRAS speed estimator is validated by both numerical simulation and real-time hardware-in-the-loop (HIL) implementations. Results indicate that the proposed adaptation mechanisms improve performance of MRAS speed estimator.

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Cite this article

[IEEE Style]

M. H. Holakooie, A. Taheri, M. B. B. Sharifian, "MRAS Based Speed Estimator for Sensorless Vector Control of a Linear Induction Motor with Improved Adaptation Mechanisms," Journal of Power Electronics, vol. 15, no. 5, pp. 1274-1285, 2015. DOI: 10.6113/JPE.2015.15.5.1274.

[ACM Style]

Mohammad Hosein Holakooie, Asghar Taheri, and Mohammad Bagher Bannae Sharifian. 2015. MRAS Based Speed Estimator for Sensorless Vector Control of a Linear Induction Motor with Improved Adaptation Mechanisms. Journal of Power Electronics, 15, 5, (2015), 1274-1285. DOI: 10.6113/JPE.2015.15.5.1274.