MRAS Based Speed Sensor-less Vector Controlled Induction Motor Using Modified Adaptive Mechanism

• Main Authors: ALIYU Eneji Isah, HUANG Shoudao, LIAO Wu, SALIU A. M.
• Format: Article
• Language: English
• Published: IFSA Publishing, S.L. 2013-08-01
• Series: Sensors & Transducers
• Subjects: Field oriented control (FOC); Sensor-less; Induction motor; Operational stability; Estimators.
• Online Access: http://www.sensorsportal.com/HTML/DIGEST/august_2013/P_1290.pdf
• ISSN: 2306-8515; 1726-5479

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.