Position & Speed Estimation of a Micro Permanent-Magnet Synchronous Motor by Stator Flux Linkage Estimator

الملخص

Micro_PMSM have a very high power density and it's suitable for applications that require a small size and high power, such as applying a dentist handle, which is used by dentists to remove caries from the patient's teeth because in the handle of the wind turbine the speed is uncontrolled which reduces its effectiveness when cleaning the tooth where the speed of the motor handle decreases during removing caries.On the other hand, the control of these motors is difficult due to the presence of permanent magnets, which produce a static and uncontrollable magnetic field. Therefore, we used a control system for driving this motor, based on stator flux linkage estimator for estimating the position and velocity of the motor. Where the error was obtained between the estimated and the real currents to correct the error produced in the estimated position. Using Matlab/simulink program, we applied and simulated the Field Oriented Control (FOC) algorithm. Where the field is applied to the d-axis by demanding the reference current isd=0 and reference velocity.The results showed that the field oriented control algorithm have been succeeded in estimating the position but with a low error in speed. The error in position does not exceed 0.35%. But this is not appropriate when the motor parameters are changed