Demagnetization Correction Method by Using Inverse Analysis Considering Demagnetizing Field Distribution
A new demagnetization correction method is explained in this article. Since a magnetization curve in an open magnetic circuit is considerably affected by the demagnetizing field which depends on the shape of the magnetic material, the demagnetization correction is significantly important to evaluate...
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| Veröffentlicht in: | IEEE transactions on magnetics 2020-04, Vol.56 (4), p.1-4 |
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| container_title | IEEE transactions on magnetics |
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| creator | Fujisaki, J. Furuya, A. Shitara, H. Uehara, Y. Kobayashi, K. Hayashi, Y. Ozaki, K. |
| description | A new demagnetization correction method is explained in this article. Since a magnetization curve in an open magnetic circuit is considerably affected by the demagnetizing field which depends on the shape of the magnetic material, the demagnetization correction is significantly important to evaluate the magnetic properties of magnetic materials. In the new demagnetization correction method, a proper closed magnetic circuit curve is obtained in a way that a curve defined as a mathematical function is repeatedly modified in a computer feedback loop. In the method, the distribution of the demagnetizing field inside the magnetic material is taken into account by using the finite-element method in the computer calculation. Some calculation results about rare-earth permanent magnets are shown, and it is revealed that the new demagnetization correction method is able to reproduce the measured curves in the closed magnetic circuit with much higher accuracy than that of the classical demagnetization correction method. |
| doi_str_mv | 10.1109/TMAG.2019.2957578 |
| format | Article |
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Since a magnetization curve in an open magnetic circuit is considerably affected by the demagnetizing field which depends on the shape of the magnetic material, the demagnetization correction is significantly important to evaluate the magnetic properties of magnetic materials. In the new demagnetization correction method, a proper closed magnetic circuit curve is obtained in a way that a curve defined as a mathematical function is repeatedly modified in a computer feedback loop. In the method, the distribution of the demagnetizing field inside the magnetic material is taken into account by using the finite-element method in the computer calculation. Some calculation results about rare-earth permanent magnets are shown, and it is revealed that the new demagnetization correction method is able to reproduce the measured curves in the closed magnetic circuit with much higher accuracy than that of the classical demagnetization correction method.</description><identifier>ISSN: 0018-9464</identifier><identifier>EISSN: 1941-0069</identifier><identifier>DOI: 10.1109/TMAG.2019.2957578</identifier><identifier>CODEN: IEMGAQ</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Closed-loop systems ; Demagnetization ; Feedback loops ; Finite element method ; finite-element analysis ; Frequency distribution ; Magnetic circuits ; magnetic fields ; Magnetic materials ; Magnetic properties ; Magnetic resonance imaging ; Magnetism ; Magnetization ; Magnetization curves ; Mathematical analysis ; Mathematical functions ; open-loop systems ; Permanent magnets ; Rare earth elements ; Saturation magnetization ; Superconducting magnets</subject><ispartof>IEEE transactions on magnetics, 2020-04, Vol.56 (4), p.1-4</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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Since a magnetization curve in an open magnetic circuit is considerably affected by the demagnetizing field which depends on the shape of the magnetic material, the demagnetization correction is significantly important to evaluate the magnetic properties of magnetic materials. In the new demagnetization correction method, a proper closed magnetic circuit curve is obtained in a way that a curve defined as a mathematical function is repeatedly modified in a computer feedback loop. In the method, the distribution of the demagnetizing field inside the magnetic material is taken into account by using the finite-element method in the computer calculation. Some calculation results about rare-earth permanent magnets are shown, and it is revealed that the new demagnetization correction method is able to reproduce the measured curves in the closed magnetic circuit with much higher accuracy than that of the classical demagnetization correction method.</description><subject>Closed-loop systems</subject><subject>Demagnetization</subject><subject>Feedback loops</subject><subject>Finite element method</subject><subject>finite-element analysis</subject><subject>Frequency distribution</subject><subject>Magnetic circuits</subject><subject>magnetic fields</subject><subject>Magnetic materials</subject><subject>Magnetic properties</subject><subject>Magnetic resonance imaging</subject><subject>Magnetism</subject><subject>Magnetization</subject><subject>Magnetization curves</subject><subject>Mathematical analysis</subject><subject>Mathematical functions</subject><subject>open-loop systems</subject><subject>Permanent magnets</subject><subject>Rare earth elements</subject><subject>Saturation magnetization</subject><subject>Superconducting magnets</subject><issn>0018-9464</issn><issn>1941-0069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNpFkFFPwjAUhRujiYj-AOPLEp-HvWu7to8EBEkgvsBz0213UAIbtsMEfr2bEH269-Sec3LzEfIMdABA9dtyMZwOEgp6kGghhVQ3pAeaQ0xpqm9Jj1JQseYpvycPIWxbyQXQHtmMcW_XFTbubBtXV9Go9h7z33WBzaYuouwUrYKr1tGs-kYfMBpWdncKLrTeKrgCfXf87-nUxOGuiMYuNN5lx67tkdyVdhfw6Tr7ZDV5X44-4vnndDYazuM80ayJE14WICRLBeep5kpbXgAwXVIpbY5WyEzLzJZZniiLlAPmXEjMLEdbWqlYn7xeeg--_jpiaMy2Pvr242ASJjUTqQLWuuDiyn0dgsfSHLzbW38yQE0H1HRATQfUXIG2mZdLxiHin1_pFEBp9gNOA3Ok</recordid><startdate>20200401</startdate><enddate>20200401</enddate><creator>Fujisaki, J.</creator><creator>Furuya, A.</creator><creator>Shitara, H.</creator><creator>Uehara, Y.</creator><creator>Kobayashi, K.</creator><creator>Hayashi, Y.</creator><creator>Ozaki, K.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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Since a magnetization curve in an open magnetic circuit is considerably affected by the demagnetizing field which depends on the shape of the magnetic material, the demagnetization correction is significantly important to evaluate the magnetic properties of magnetic materials. In the new demagnetization correction method, a proper closed magnetic circuit curve is obtained in a way that a curve defined as a mathematical function is repeatedly modified in a computer feedback loop. In the method, the distribution of the demagnetizing field inside the magnetic material is taken into account by using the finite-element method in the computer calculation. 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| subjects | Closed-loop systems Demagnetization Feedback loops Finite element method finite-element analysis Frequency distribution Magnetic circuits magnetic fields Magnetic materials Magnetic properties Magnetic resonance imaging Magnetism Magnetization Magnetization curves Mathematical analysis Mathematical functions open-loop systems Permanent magnets Rare earth elements Saturation magnetization Superconducting magnets |
| title | Demagnetization Correction Method by Using Inverse Analysis Considering Demagnetizing Field Distribution |
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