摘要
为解决大功率直线电机的温升问题,设计了匹配自由活塞斯特林发电机用的动磁直线电机,并建立电机的三维温度场分析模型.该模型考虑实际电机中铜耗、铁耗、涡流损耗等因素,对线圈绕组进行了等效分析,模拟计算结果和实验结果符合较好,表明了模型的准确性.结合一台输出功率为5kW的斯特林发电机结构特性,设计了一种既满足冷端换热器换热需要又实现直线电机冷却的双用式冷却结构.利用该模型计算得到了电机各个部件的温度分布情况,并与实验结果进行对比验证,具有较好的一致性.与常规冷却结构进行比较分析,结果表明该双用式冷却结构对于线圈、磁铁等结构冷却性能更优.
To solve the temperature rising problem of high-power linear motors,a linear permanent magnet generator(LPMG)matched for free piston Stirling generator(FPSG)was designed and the three-dimensional temperature field analysis model of the generator was established.Factors such as copper loss,iron loss and eddy current loss in the actual motor were considered and the equivalent analysis of the coil windings was performed.Good agreement of the final computation results with the experimental data indicated the validity of this model.Based on the structural characteristics of the FPSG with an output power of 5 kW,a dual-purpose cooling structure was designed for cooling both the cooler and the linear motor.Meanwhile,the temperature distribution of each part of the FPSG was carried out by using this model,which was in good consistency with experimental data.Compared with the conventional cooling structure,results show that the dual-purpose cooling structure has better cooling performance for coils,magnets,and so on.
作者
林明嫱
牟健
池春云
洪国同
LIN Mingqiang;MOU Jian;CHI Chunyun;HONG Guotong(Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第5期120-125,共6页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金青年基金资助项目(51806227)。
关键词
自由活塞斯特林发电机
动磁直线电机
温度场
冷却
热分析
free piston Stirling generator
linear permanent magnet generator
temperature field
cooling
thermal analysis
