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Field computation and irreversible demagnetisation loss for cylindrical permanent magnets stabilised in air

Feldberechnung und irreversible Entmagnetisierung von zylindrischen, in Luft stabilisierten Permanentmagneten

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A new finite element formulation for solving the axisymmetric field of cylindrical magnets stabilised in air is presented in the paper. Experimental verification indicates good agreement with the field computation method. By using the method, the amount and distribution of irreversible demagnetisation loss within the air-stabilised cylindrical magnets can be accurately determined. Design curves for rapid predicting the irreversible demagnetisation loss are given. The effects of magnet material and geometry parameters are discussed.

Übersicht

Für das axialsymmetrische Feld von zylindrischen, luftstabilisierten Permanentmagneten wird eine neue Formulierung mit Hilfe Finiter Elemente angegeben. Die experimentelle Überprüfung zeigt gute Übereinstimmung mit der Feldberechnung. Mit dieser Methode können Ausmaß und Verteilung der irreversiblen Entmagnetisierung genau bestimmt werden. Entwurfskurven für eine schnelle Vorausbestimmung der Entmagnetisierung werden angegeben. Die Einflüsse des Magnetmaterials und der Geometrieparameter werden diskutiert.

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References

  1. Gu, Q.;Cai, L.: Field computation of permanent magnets with knee points. IEE Proc. pt. B, 136 (1989) No. 6, 275–279

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  2. Gu, Q.; Jiang, X.; Cai, L.; Chen, S.: Irreversible demagnetization loss for electric machines with arc-shaped permanent magnets stabilised in air. Arch. Elektrotech. to be published

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Authors and Affiliations

  1. Department of Electrical Engineering, Shanghai Jiao Tong University, 1954 Hua Shan Road, 200030, Shanghai, VR China

    Xiumei Jiang, Shoufa Chen & Qishan Gu

Authors
  1. Xiumei Jiang
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  2. Shoufa Chen
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  3. Qishan Gu
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Jiang, X., Chen, S. & Gu, Q. Field computation and irreversible demagnetisation loss for cylindrical permanent magnets stabilised in air. Electrical Engineering 78, 89–96 (1995). https://doi.org/10.1007/BF01245639

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  • DOI: https://doi.org/10.1007/BF01245639

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