Parameter mismatch is the main factor that causes severe position estimation error for sensorless permanent magnet-assisted synchronous reluctance motor (PMa-SynRM) drives. In this article, a robust hybrid flux observer (HFO) based on extended state observer (ESO) with active flux error estimation is proposed to improve the robustness of parameter mismatch. Based on the analysis of parameter mismatch sensitivity of traditional HFO, an ESO is constructed to obtain the active flux estimation error caused by parameter mismatch in the current model. The active flux estimation error can be compensated by feedback loop to improve the accuracy of rotor position estimation. Meanwhile, both the influence of ESO parameters and the stability are analyzed. The proposed method is independent of the precise dq-axis inductance parameters and flux linkage of the motor, which has strong robustness to parameter mismatch. Finally, experiments are carried out on a platform of 2.2-kW PMa-SynRM drive to verify the effectiveness of the proposed method.
ESO-Based Robust Hybrid Flux Observer With Active Flux Error Estimation for Position Sensorless PMa-SynRM Drives
IEEE Transactions on Transportation Electrification ; 11 , 1 ; 2049-2060
01.02.2025
4583658 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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