摘要
永磁体涡流损耗是高功率密度永磁同步电机热退磁的主要原因之一,对永磁同步电机安全、可靠运行非常重要。本文结合理论分析,使用三维有限元法对永磁体涡流损耗的产生因素及分布特性进行分析。运用涡流密度线的概念及模型,使得永磁体涡流损耗的分布更易于理解。通过将得到的永磁体涡流损耗分块平均分布数据和永磁体涡流损耗整块平均分布数据分别代入三维温度场中进行计算,并与温升实验数据进行对比分析,证明了本文得到的永磁体涡流损耗分布对准确计算永磁体局部温升最热点非常重要。为了适用于工程计算,研究了永磁体涡流损耗各个方向的分布特点对温升分布的影响,并总结出快速、简单且较为准确的永磁体局部最热点计算方法。
Permanent magnet(PM) eddy current loss is one of the most important thermal demagnetization factors in high power density permanent magnet synchronous motors(PMSMs), which is very important to the safe and reliable operation of PMSMs. Combining with the theoretical analysis, this paper uses three dimensional(3D) finite element method(FEM) analyzes each origin caused PM eddy current loss and the distribution of PM eddy current loss. This paper proposes a model of eddy current density line to make the PM eddy current loss distribution be easy to understand. The average PM eddy current of each block data and the average PM eddy current loss of the whole PM data are both imported to the 3D thermal field and compares with the experiment, illustrating the important of PM eddy current loss distribution to the calculation of the maximum temperature rising of PM. To be more suitable to engineering calculation, the influence of PM eddy current loss distribution characteristics in each direction to temperature rising distribution is investigated to conclude a relatively fast, simple and accuracy method to calculate the maximum temperature rising of PM.
出处
《电工技术学报》
EI
CSCD
北大核心
2015年第6期1-9,共9页
Transactions of China Electrotechnical Society
基金
国家科技支撑计划(2013BAE08B00)
国家自然科学基金(51307111)
辽宁省教育厅科学技术研究(L2013049)资助项目
关键词
3D有限元
永磁体涡流损耗分布
涡流密度线
永磁体局部最热点
3D FEM,PM eddy current loss distribution,eddy current density lines,maximum temperature rising of PM
