Application of high-temperature permanent magnets Sm(Co, Fe, Cu, Zr)z in PPM focusing system
来源期刊：JOURNAL OF RARE EARTHS2008年第5期
论文作者：PENG Long LIU Yingli YANG Qinghui SONG Yuanqiang ZHANG Huaiwu
Key words：rare earth permanent magnets; Sm(Co,Fe,Cu,Zr)Z; PPM focusing system; Maxwell 2D/3D; magnetic field simulation;
Abstract: Rare earth permanent magnets Sm(Co, Fe, Cu, Zr)z with outstanding performance and high-temperture thermal stability were fabricated. Optimized by Fe content and process, Sm(Co0.72Fe0.1Cu0.1Zr0.03.03)7.5 magnet with Br>0.75 T and Hci>1300 kA/m at 300 ℃ can be obtained. According to the performance data of Sm(Co0.72Fe0.15Cu10.1Zr0.03)75, the magnetic field along central axis BZ in periodic permanent magnet (PPM) focusing system was simulated using electromagnetic field analysis software Maxwell 2D/3D. The BZ exhibited typical cosine curve along central axis, and the peak value of BZ was high enough to meet the demand of PPM focusing system at room temperature even at 200±20 ℃. Additionally, a kind of simple cooling structure for PPM focusing system was designed by setting cooling pipe between polepieces.Simulated results showed that smooth cosine curve of BZ was successfully achieved with good control of the thickness of cooling pipe.
PENG Long1，LIU Yingli1，YANG Qinghui1，SONG Yuanqiang1，ZHANG Huaiwu1
(1.State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of China,Chengdu 610054,China)
Abstract:Rare earth permanent magnets Sm(Co, Fe, Cu, Zr)z with outstanding performance and high-temperture thermal stability were fabricated. Optimized by Fe content and process, Sm(Co0.72Fe0.1Cu0.1Zr0.03.03)7.5 magnet with Br>0.75 T and Hci>1300 kA/m at 300 ℃ can be obtained. According to the performance data of Sm(Co0.72Fe0.15Cu10.1Zr0.03)75, the magnetic field along central axis BZ in periodic permanent magnet (PPM) focusing system was simulated using electromagnetic field analysis software Maxwell 2D/3D. The BZ exhibited typical cosine curve along central axis, and the peak value of BZ was high enough to meet the demand of PPM focusing system at room temperature even at 200±20 ℃. Additionally, a kind of simple cooling structure for PPM focusing system was designed by setting cooling pipe between polepieces.Simulated results showed that smooth cosine curve of BZ was successfully achieved with good control of the thickness of cooling pipe.
Key words:rare earth permanent magnets; Sm(Co,Fe,Cu,Zr)Z; PPM focusing system; Maxwell 2D/3D; magnetic field simulation;
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