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NUMERICAL CALCULATION OF DEMAGNETIZING FACTOR FOR PERMANENT MAGNET

K. Muramatsu, T. Nakata, N. Takahashi, K. Fujiwara, H. Ukita
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Abstract

Recently, rare earth magnets with high coercive force such as Nd‐Fe‐B magnets have been developed. When the magnetic characteristic (M‐H curve) of such a strong magnet is measured, the conventional closed magnetic circuit method using an electromagnet cannot be applicable due to the magnetic saturation of the yoke. Therefore, the open magnetic circuit method has been proposed in which high magnetic fields are generated by using a superconducting or a pulsed magnet. In this method, the correction for demagnetizing field is required. The correction can be done using the demagnetizing factor which is a function of the shape and M‐H curve. The conventional studies take into account only the shape.

Citation

Muramatsu, K., Nakata, T., Takahashi, N., Fujiwara, K. and Ukita, H. (1995), "NUMERICAL CALCULATION OF DEMAGNETIZING FACTOR FOR PERMANENT MAGNET", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 14 No. 4, pp. 157-161. https://doi.org/10.1108/eb051934

Publisher

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MCB UP Ltd

Copyright © 1995, MCB UP Limited

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