Position and Speed Sensorless Control of PMSM Drives Based on Adaptive Observer
نویسنده
چکیده
This paper develops a model reference adaptive system (MRAS) based observer for sensorless vector control of permanent magnet synchronous motor (PMSM) drives. There are used two models in MRAS observer to estimate the linkage flux with relatively clean waveforms. The voltage model in stator reference is the reference model, and the current model in estimated rotor reference is the adaptive model with the rotor position as an adjustable parameter. An adaptive compensation filter depending on speed improves the stability of the pure integration voltage model. The nonlinear adaptation mechanism extracts the error of the flux linkage position and estimates the rotor speed and position. The observer structure, implementation aspects, simulation and experimental results are presented and discussed.
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