摘要
随着风力发电的迅速发展，对高转差率异步发电机的单机容量和运行安全性提出了更高的要求。单机容量以及各项技术指标不断增加，引起电机各部分温度升高，这直接影响电机的使用寿命和运行的安全可靠性，所以对现代电机的发热与冷却问题进行研究显得日益重要。
在高转差率异步发电机的设计中，合理掌控电机稳态时的温升和其他各项指标，是电机研发成功与否的重要因素。在电机设计阶段，只有初步计算电机的温度分布和相关部件所限制的平均温升，才能对风机的热处理进行研究，进而使设计方案更加先进合理。
本文以160kW-6型电机为研究对象，对电机内温度场进行耦合分析。根据传热学理论，首先建立了电机二维温度场的模型，其次建立了电机转子部分三维温度场的模型，给出了电机损耗及散热系数的计算方法。应用有限元软件ANSYS进行计算分析。最后分析了转差率变化对电机温度场分布的影响，以及有效的散热方法，得出了一些有益的结论。
关键词 温度场；高转差率异步发电机；有限元法；ANSYS
Analysis on the temperature field in high slip induction generator
Abstract
With the fast development of wind power, the unit capacity and running safety of high slip induction generator is expected to reach a higher level. The higher temperature of each part of motor caused by the increase of unit capacity and technical indicators directly affects motor’s service life, operating safety and reliability. Thus, it is increasingly essential to research on heating and cooling for modern motor.
For designing high slip induction generator, it is decisive to soundly control motor’s steady-state temperature rise and other indicators. In the period of motor designing, only preliminarily calculating the temperature distribution of the motor and average temperature rise limited by related components, can thermal treatment for wind generator be researched. In this way, design solutions can be more rational.
This paper studies 160kw-6 motor, making coupling analysis on temperature field inside motor. According to heat transfer theory, this paper firstly build up a motor’s two-dimensional temperature field model, and secondly rotator’s partial three-dimensional temperature field model，offering calculation method for motor loss and thermal coefficient by applying the finite element software ANSYS to calculate and analyze. To sum up, this paper comes to useful conclusions by analyzing the slip change’s effects on motor temperature field distribution and useful cooling method.
Keywords Temperature field; High slip induction generator; Finite element; ANSYS
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目录
摘要 I
Abstract II
