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Study of Computation Method of Iron Loss Considering Magnetic Anisotropy by Processing Residual Stress
Author(s) -
DOI SATOSHI,
AOKI TETSUYA,
OKAZAKI KEIICHI,
TAKAHASHI YASUHITO,
FUJIWARA KOJI
Publication year - 2018
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.23091
Subject(s) - residual stress , magnetization , materials science , magnetic field , remanence , residual , stress (linguistics) , anisotropy , computation , electrical steel , mechanics , structural engineering , engineering , computer science , physics , composite material , optics , algorithm , linguistics , philosophy , quantum mechanics
SUMMARY Mass productions of the motor core such as the blanking of the electromagnetic steel sheet and the shrink fit cause the residual strain in the material, processing strain, which prevents the movement of magnetic walls and increases the magnetic loss in the motor. Conventionally, the increase of the magnetic loss by the processing stress was evaluated with trial products, because it could not be done in the design phase. Particularly, the residual stress generated by processing has a complicated relationship with the direction of the magnetization vector, which has made it difficult to estimate iron loss considering processing strain. So, this paper clarified the relationship between the stress tensor and the magnetization vector, and proposed a consideration method of the stress in magnetic field analysis. As a result of validating the development method with the ring test piece, we confirmed that the intended modeling can be reproduced. Furthermore, we showed the usefulness of the development method in the motor model.