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Vol. 155, Issue 8, August 2013, pp. 80-85




MRAS Based Speed Sensor-less Vector Controlled Induction Motor Using Modified Adaptive Mechanism
1 ALIYU Eneji Isah, 1 HUANG Shoudao, 1 LIAO Wu, 2 SALIU A. M.

1 Hunan University, College of Electrical and Information Engineering, Changsha, Hunan Province, 410082, People Republic of China

2 Hunan University, College of Information Science and Engineering, Changsha, Hunan Province, 410082, People Republic of China
Tel.: +8615274920374
E-mail: etudaye2010@gmail.com


Received: 16 May 2013   /Accepted: 12 August 2013   /Published: 20 August 2013

Digital Sensors and Sensor Sysstems


Abstract: To improve operational stability of control system induction motor, a speed sensorless vector control system for induction motor based on DSP (TMS320F2808) was presented, fluxes estimation and speed observer based on PI adaptive method; model reference adaptive system (MRAS), a speed sensorless field-oriented control (FOC) system for induction motor was adopted. The speed estimation was based on the difference between two fluxes estimators; reference and adaptive model. The adaptive mechanism of the conventional estimator was replaced with a booster module driven by error signal from the two models. The proposed control algorithm, simulations, implementation data, diagrams and test results were given. It shows good performance for the sensorless vector control system in torque, speed and robustness.


Keywords: Field oriented control (FOC), Sensor-less, Induction motor, Operational stability, Estimators.


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