国产SH系列烧结钕铁硼永磁体的性能分析  

Performance analysis of sintered NdFeB permanent magnets of SH series made in China

作　　者：林岩[1] 姜代维[2] 陈海玲[2] 毕海涛[1] 

机构地区：[1]沈阳工业大学特种电机研究所,沈阳110023 [2]沈阳工业大学信息科学与工程学院,沈阳110023

出　　处：《沈阳工业大学学报》2006年第5期510-512,517,共4页Journal of Shenyang University of Technology

基　　金：国家科技攻关计划项目(2002BA315A-6)

摘　　要：烧结钕铁硼永磁材料的出现促进了永磁电机的发展.但是由烧结钕铁硼材料一致性和热稳定性差引起的永磁电机不可逆退磁问题一直困扰着钕铁硼稀土永磁电机的推广.通过实验室现有仪器,对国产的200多块SH系列烧结NdFeB永磁体的常温和高温下磁性能参数进行测试.根据测试结果及烧结钕铁硼永磁材料的IEC标准和中国国家标准,对热稳定性和一致性进行了分析.指出:电机用烧结钕铁硼材料除了要满足现行标准之外还必须满足内禀矫顽力曲线矩形度HK/HcJ值和温度系数α(Br)、α(HcJ)的要求.Because of the advantages, such as high remanence, coercivity and BH product, NdFeB materials have been extensively applied to electrical machines. But irreversible demagnetization problems of NdFeB materials have been perplexing the extensive applications of NdFeB PMSM all the time. Magnetic performance parameters of two hundreds SH series sintered NdFeB magnets made in China at room temperature and high temperature are tested in the lab. Based on the testing results, IEC standard and Chinese national standard about sintered NdFeB materials, the thermal stability and coherence of these magnets are analyzed. It is pointed out that the magnetic properties of sintered NdFeB materials for electrical machines should meet not only the specific values in standards but also the requirements of temperature coefficients a （Br）, a （Hcj）.

关 键 词：烧结钕铁硼 热稳定性 一致性 不可逆退磁 温度系数 

分 类 号：TM273[一般工业技术—材料科学与工程]