Rotor Reconstruction to Reduce Iron Losses in Partitioned Stator Flux-Modulation Machine

In this paper, a rotor reconstruction method based on the air-gap field coding is proposed to reduce iron losses of the partitioned stator flux-modulation (PSFM) machine. First, the armature and permanent magnet magnetomotive force (MMF) models are established, respectively. Considering the double a...

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Bibliographic Details
Published in:IEEE transactions on energy conversion 2024-08, p.1-13
Main Authors: Ji, Jinghua, Wang, He, Ling, Zhijian, Zhao, Wenxiang, Zhang, Tianyu
Format: Article
Language:English
Subjects:
Air gaps
air-gap permeance
Field-modulation machine
Harmonic analysis
Iron
iron losses
Modulation
partitioned structure
rotor reconstruction
Rotors
Stator windings
Torque
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Summary:In this paper, a rotor reconstruction method based on the air-gap field coding is proposed to reduce iron losses of the partitioned stator flux-modulation (PSFM) machine. First, the armature and permanent magnet magnetomotive force (MMF) models are established, respectively. Considering the double air-gap modulation effect of the PSFM machine, the amplitude and rotation velocity of each harmonic are analyzed. Then, the contributions of each harmonic component in the air gap to iron losses are separated. Subsequently, an air-gap permeance model that determines the characteristics of harmonic components is established. On this basis, air-gap harmonics can be weakened by encoding the amplitude of the permeance. Simultaneously, the improved permeance harmonic components are reconstituted to guide the new rotor structure without optimizing parameters of the machine. The proposed rotor structure can effectively suppress the iron losses of the PSFM machine. Finally, a prototype of the rotor reconstructed PSFM machine is manufactured and tested to verify the effectiveness of the analytical results.
ISSN:0885-8969
1558-0059
DOI:10.1109/TEC.2024.3436815