Nowadays many studies focusing on for the elimination of the speed and position sensors for Field oriented control (FOC) based speed control of AC machines. It avoids the drawback of the sensors such as, the required additional mounting space, decreasing the reliability in harsh environments and increase the cost of the machines. In this work, sensorless speed control of permanent magnet synchronous motor (PMSM) using model reference adaptive system (MRAS) is proposed. Stator current based Model reference adaptive system is used to estimate the speed of the motor and also the adaptation mechanism constructed by using Popov hyper stability principle. The main idea here is that the reference model, which is the permanent magnet synchronous motor (PMSM), d-q axis stator current output compared with the adjustable model d-q axis current and their difference pass through adaptation method to estimate the speed of the motor. In addition, model reference adaptive system (MRAC) with Lyapunov stability adaptation mechanism is employed for speed control of machine which decrease the dependence on system parameters significantly. This controller parameters are tuned in such a way that the plant follows the reference model. The effectiveness of the proposed system is tested through computer simulation. The software used to test the effectiveness of the proposed system is MATLAB/Simulink. The system gives good performance at loaded and no load conditions and hence it can work with different load torque conditions and system parameter variation. The output of the proposed system compared with the result of the system using conventional proportional and integral (PI) speed controller shows better performance.
SENSORLESS SPEED CONTROL OF PERMANENT MAGNET SYNCHRONOUS MOTOR USING MODEL REFERENCE ADAPTIVE SYSTEM
2019-10-13
doi:10.20372/nadre/4006
Hochschulschrift
Elektronische Ressource
Englisch
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