Abstracts - Dipartimento di Elettronica Applicata
Abstracts - Dipartimento di Elettronica Applicata
Abstracts - Dipartimento di Elettronica Applicata
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Meta 2010 & FEM 2010 – Rome, 13-15 December 2010<br />
Application of ON/OFF Method to New<br />
Conceptual Design of Magnetic Devices<br />
Norio Takahashi<br />
Dept. Electrical and Electronic Eng., Okayama Univ. Tsushima, Okayama<br />
700-8530, Japan E-mail: norio@elec.okayama-u.ac.jp<br />
In the development of an electromagnetic device, the design based on the experience<br />
of designers is usually performed. Recently, various optimal design methods using<br />
electromagnetic field analysis are developed and applied to the design of actual<br />
magnetic devices. In those methods, we must imagine the outline of the optimal shape<br />
of the magnetic circuit, and the <strong>di</strong>mensions etc. are determined by the optimization<br />
software. Therefore, it may be <strong>di</strong>fficult to get a newly developed magnetic circuit<br />
which we could not imagine beforehand. If a topology optimization method which<br />
can determine the optimal topology by <strong>di</strong>stributing materials in a design domain is<br />
used, there is a possibility that a new magnetic circuit can be <strong>di</strong>scovered, because it is<br />
not necessary to set design variables in advance. In this paper, the ON/OFF method<br />
which can determine the optimal topology considering 3-D shape and the nonlinearity<br />
of magnetic material is examined. The effectiveness of the newly developed ON/OFF<br />
method is shown applying it to the design of various magnetic devices, such as<br />
magnetic head[1], shield[2], motor[3] etc. Fig.1 shows the obtained shape of high<br />
density magnetic head. A reasonable shape is obtained. Fig. 2 shows the optimal<br />
shape of IPM motor which produces a higher driving torque.<br />
References<br />
[1] K.Akiyama, D. Miyagi, N.Takahashi, “Design of CF-SPT Head Having Large Recor<strong>di</strong>ng Field<br />
and Small Stray Field Using 3-D ON/OFF Method”, IEEE Trans. on Magn., Vol. 42, No.10,<br />
pp.2431-2433, 2006.<br />
[2] N. Takahashi, S. Nakazaki, D. Miyagi: “ Examination of Optimal Design Method of<br />
Electromagnetic Shield Using ON/OFF Method”, IEEE Trans. on Magn., Vol. 45, no.3, pp.1546-<br />
1549, 2009.<br />
[3] N. Takahashi, T. Yamada, D. Miyagi: “Examination Optimal Design of IPM Motor Using ON/OFF<br />
Method ”, IEEE Trans. on Magn., Vol.46, No. 8, pp.3149-3152, 2010.<br />
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