摘要
为实现定位平台的大运动行程和高运动精度,建立了一种新型磁悬浮直线运动平台,该平台由磁悬浮运动装置和电磁直线驱动装置组成,具有无摩擦、高刚度等优点。针对磁悬浮直线运动平台长时间运行过程中电磁铁的发热问题,运用有限元软件对电磁铁的发热机理、发热量以及热量的时空分布进行了分析,并和实验数据进行了对比。结果表明,在常温常压下,电磁铁温度上升到一定程度后即达到平衡,不需要加装冷却装置。而在真空环境下,电磁铁温度会不断增加,必须加装冷却装置来降低温度。最后,通过仿真对真空环境下的冷却装置设计进行了简单地讨论。
A novel linear maglev transportation platform,including a levitation mechanism and a propulsion mechanism,was presented to realize long travel range and precise motion.The platform has many advantages such as friction-free and high stiffness.To analyze the influences caused by the heat generated from electromagnets,the heat generation mechanism,heat rate and heat spatial distribution were discussed with finite-element method.The analyses showed that when its work environment is NPT（normal pressure and temperature）,the electromagnet temperature is not always increase and the cooling mechanism is not necessary.However,when in the vacuum environment,the temperature of electromagnet always rises up.It is indispensable to add cooling mechanisms for the electromagnets to reduce the temperature.Some experiments were also conducted.The experimental results testified the analyses.Finally,the cooling mechanism was simply introduced in the vacuum and the corresponding cooling effect was also preliminarily investigated with simulation.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2011年第15期114-120,共7页
Proceedings of the CSEE
基金
国家自然科学基金项目(51005253)
国家863高技术基金项目(2007AA04Z344)~~
关键词
磁悬浮直线运动
有限元
热分析
冷却装置
linear maglev motion
finite element
thermal analysis
cooling mechanism
