| Abstract |
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. |
