This article proposes a fault-tolerant sensorless control strategy based on a frequency adaptive extended state observer (ESO) with complex coefficient filter (FAESO-CCF) for a $3\times 3$ -phase permanent magnet (PM)-assisted synchronous reluctance motor (PMA-SynRM) with single-phase open-circuit fault (OCF). By controlling the cooperative operation of each module, the torque ripple can be significantly reduced, thereby realizing the fault-tolerant operation under single-phase OCF. In order to meet the requirements of fault tolerance, the input voltage and current of the position sensorless are severely distorted, resulting in a decrease in the estimation accuracy of the rotor position. To solve this problem, the frequency adaptive ESO (FAESO) with bandpass filter properties is proposed. Moreover, a complex coefficient filter (CCF) is introduced to extract the third and fifth harmonics in the active flux estimated by FAESO, so that the bandwidth of FAESO can be appropriately relaxed and the response speed of the system can be improved. Meanwhile, a type-3 phase-locked loop (PLL) is designed to overcome the defect of type-2 PLL that there is a steady-state error during ramp acceleration, which further improves the accuracy of system. Finally, the accuracy and effectiveness of the proposed observer are evaluated by experiments.
Fault-Tolerant Sensorless Control for a 3 × 3-Phase PMA-SynRM Based on Frequency Adaptive Extended-State-Observer
IEEE Transactions on Transportation Electrification ; 11 , 1 ; 2504-2515
01.02.2025
2566396 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch