Sensorless Control of Surface Mounted Permanent Magnet Synchronous Motor using Fractional Order Sliding Mode Control
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Date
2025-01
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Addis Ababa University
Abstract
This research presents Sliding Mode Speed Estimator (SMSE) and Fractional Order
Sliding Mode Control (FOSMC) for permanent magnet synchronous motors (PMSM) to
achieve high performance sensorless control. The SMSE is able to estimate the rotor
position and speed. The back electromotive force SMSE is proposed. The estimated
rotor position and speed are used to replace the actual values detected by the sensor.
The estimation and PMSM modeling su er with uncertainty and chattering hence, need
robust control method to work e ciently in the whole working ranges of speed. Sensorless
speed control su ers with accuracy speci cally in the low speed region of the PMSM
control due-to estimation and modeling defects. Therefore, FOSMC comes into application
for enhancing the performance of PMSM during the transient conditions. Hence,
the estimation accuracy is tracked within very short settling time of less than 1 second
and the robustness against uncertainties is enhanced. This is veri ed with simulation
results performed using MATLAB Simulink
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Keywords
SPMSM, FOSMC, SMSE, MATLAB, Simulink