A5006170103- Electric Motor Design and Analysis
- Magnetic Bearings and Levitation Dynamics
- Magnetic Properties and Applications
- Sensorless Control of Electric Motors
- Machine Fault Diagnosis Techniques
- Plasma Diagnostics and Applications
Beihang University
2022-2023
With the advantages of a high power-to-weight ratio and oil-free bearings, magnetically suspension centrifugal compressor (MSCC) equipped with active magnetic bearings operates more efficiently than traditional mechanical compressors over wide speed range by precisely controlling high-speed permanent-magnet synchronous motor (PMSM). However, owing to harsh working environment, parameters, including resistor, inductance, flux linkage, vary significantly. This degrades rotor position observer...
Monitoring rotor temperature is a significant issue for safe operations in magnetically suspended turbo molecular pump (MSTMP). The increase may cause the irreversible demagnetization of permanent magnet (PM) and destroy vacuum environment, eventually affecting efficiency security MSTMP system. Unfortunately, direct measurement complicated practice due to difficulty accessing sensors on rotating shaft. This article proposes novel estimation method based identification PM flux linkage. In...
Demagnetization fault diagnosis is a significant issue in magnetically suspended permanent magnet synchronous motor (PMSM). The occurrence of (PM) demagnetization reduces the efficiency and even disables whole power system. Unfortunately, it challenging to extract feature evaluate exact severity precisely due rich environmental noise coupling faults. This article proposes novel strategy using improved variational mode decomposition (VMD) energy moment relative entropy (EMRE) achieve...
Demagnetization fault of ultra-high-speed permanent magnet synchronous motor (PMSM) is a significant issue, which may cause abnormal heating and eventually affect the security system. An equivalent-input-disturbance (EID) method based on super twisting algorithm sliding mode observer (STA-SMO) proposed in this paper to perform fault-tolerant control for demagnetization. First, mathematical model demagnetizated PMSM established. Then, STA-SMO designed observe variation flux linkage. Finally,...