Bearingless permanent magnet Vernier motors (BPMVMs), due to the characteristics of high torque density, no friction, and high efficiency, have great potential for application in high-precision fields such as Hydrogen fuel cells and wind power generation. This article presents a suppression strategy for the rotor eccentricity effect in sensorless control of BPMVM. In this article, first, the effect of rotor eccentricity on BPMVM is discussed, which results in dc offset and harmonics of back electromotive force (EMF), and thus impacts the accuracy of sensorless control based on sliding mode observer (SMO). Second, a second-order generalized integrator with dc offset rejection capability (SOGI-DCRC) based observer is proposed to compensate for the abnormalities in the back-EMFs caused by rotor eccentricity to achieve accurate sensorless operation. Finally, the good steady and transient performance of the proposed method has been confirmed by experimental results.
Suppression of Rotor Eccentric Effect in Sensorless Bearingless Permanent Magnet Vernier Motor Drives
IEEE Transactions on Transportation Electrification ; 11 , 4 ; 9177-9187
2025-08-01
3140073 byte
Article (Journal)
Electronic Resource
English
Vernier Permanent Magnet Motor Drives
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