期刊
IEEE TRANSACTIONS ON MAGNETICS
卷 46, 期 1, 页码 15-20出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMAG.2009.2027815
关键词
Conductivity; permanent magnet; rare-earth; resistivity
资金
- Finnish Cultural Foundation
- Research Foundation of Helsinki University of Technology
- Ulla Tuomisen Saatio
- High Technology Foundation of Satakunta
- European Regional Development Fund
We studied the resistivity of rare-earth permanent-magnet materials over the temperature range -40 degrees C to + 150 degrees C. We investigated three different materials from four manufacturers, including Nd(2)Fe(14)B, SmCo(5), and Sm(2)Co(17), and measured their resistivities and temperature coefficients. We found that rare-earth permanent-magnet materials show an anisotropic resistivity behavior. In fact, the resistivity anisotropy causes larger resistivity difference than the temperature variation within the range studied. In many applications, such as permanent-magnet motors, this behavior has to be taken into account in design.
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