烧结钕铁硼材料的热稳定性对电机设计的影响及合理选择  

Influence of thermal stability of sintered NdFeB on electric machine design and its appropriate selection

作　　者：林岩[1] 周广旭[1] 唐任远[1] 周挺[1] 

机构地区：[1]沈阳工业大学特种电机研究所,沈阳110023

出　　处：《沈阳工业大学学报》2007年第6期618-622,共5页Journal of Shenyang University of Technology

基　　金：国家科技攻关计划资助项目(2002BA315A-6)

摘　　要：稀土永磁尤其是烧结钕铁硼永磁材料的出现,对永磁电机的发展起到积极的推动作用,但是钕铁硼永磁电机在运行时产生的不可逆退磁问题一直困扰着这种电机的推广应用.为了解决该问题,着重分析了烧结钕铁硼永磁材料的热稳定性对电机设计、永磁体用量的影响.在大量烧结钕铁硼材料测试分析的基础上,提出了准确、实用的烧结钕铁硼永磁材料的选择标准,即由常温下的磁性能推算永磁体高温热稳定性.实践表明,该方法可以保证永磁电机设计的合理性和运行的可靠性.The appearance of rare earth permanent magnet, especially sintered NdFeB materials, promoted the development of permanent magnet machines. However, the irreversible demagnetization problems of NdFeB materials have been perplexing the extensive applications of NdFeB permanent magnet machines. In order to solve the problem, the influence of thermal stability of sintered NdFeB materials on design of permanent magnet machines and volume of permanent magnet materials was analyzed. Based on the measurement and analysis of many NdFeB permanent magnet materials, the selecting standard, which could calculate the thermal stability through magnetic parameters, was put forward. It is verified that the proposed method ensures the reasonable design and operating reliability of permanent magnet machines.

关 键 词：钕铁硼 永磁电机 最大去磁 热稳定性 不可逆退磁 

分 类 号：TM273[一般工业技术—材料科学与工程]