摘要
摘要:随着现代电机制造工业的发展,对电机温度场计算准确性的要求越来越高。该文根据传热学原理建立了水轮发电机转子三维稳态温度场的数学模型,给出了求解域内的基本假设及相应的边界条件,并根据电磁场理论确定了各部分的损耗密度。以SF320-48/12800型水轮发电机为例,采用三维等参元法计算了转子一个磁极、半个轴向段的温度场,计算结果与实测结果相接近。采用数值模拟的方法研究了转子迎风面和背风面不均匀表面散热系数比对电机转子中部及[(\266\313\262\277)(\316\302\266\310\263\241\265\304\323\260\317\354)] ,以 及 转 子 磁 极 表 面 的 附加 损耗对转子温度场的影响,得到了转子温度场的分布规律,该结果对电机制造人员的通风系统设计和电机运行部门的温度监测提供了可靠的理论依据。
With the development of modern electrical machine manufacturing, calculation veracity of electrical machine temperature field is more and more cared for. In this paper the mathematic model of the rotor temperature field for a hydro-generator is established, and hypothetical conditions of the solution region in the hydro-generator are presented. Losses density are calculated according to the electromagnetic field theory. SF320-48/12800 Hydro-generator is taken for example and temperature fields of a pole shoe and half an axial section in rotor is calculated in use of 3D Isoparemetric Element Method. The results meet the measured values very well. Numerical simulated method is applied to study the influence of the uneven surface coefficients of heat transfer in rotor抯 wind side and lee side on the temperature field in middle and end part of rotor. Also, the influence of the stray loss on the surface of pole on rotor temperature field is analyzed. Distribution rule of rotor temperature fields is obtained and this will provide dependable theory evidences for the design of cooling system and temperature inspection in department of generator running.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2002年第10期85-90,共6页
Proceedings of the CSEE
基金
黑龙江省自然科学基金项目(E00-14 )
