新型双定子无刷双馈风力发电机温度场计算与分析  

Calculation and Analysis of Temperature Field of a Novel Brushless Doubly-Fed Wind Generator with Double Stators

作　　者：王一 张凤阁[1] 蒋晓东 王惠军[2] 张何 WANG Yi;ZHANG Fengge;JIANG Xiaodong;WANG Huijun;ZHANG He(College of the Electrical Engineering,Shenyang University of Technology,Shenyang 110870,China;College of the Instrument Science and Optoelectronic Engineering,Beihang University,Beijing 100191,China;Power Electronics,Machines and Control Group,University of Nottingham,Nottingham 999020,England)

机构地区：[1]沈阳工业大学电气工程学院,沈阳110870 [2]北京航空航天大学仪器科学与光电工程学院,北京100191 [3]诺丁汉大学电力电子电机和控制研究组,英国诺丁汉999020

出　　处：《大电机技术》2019年第1期5-11,共7页Large Electric Machine and Hydraulic Turbine

基　　金：国家自然科学基金重点资助项目(51537007)

摘　　要：针对现有风力发电机功率密度较小,运输成本高,容错性较差等问题,本文提出一种新型笼障转子耦合双定子无刷双馈风力发电机。该种电机内部谐波磁场丰富,损耗较大,导致其在运行时温升较高。然而温升对电机性能具有较大的影响,因此对其准确计算至关重要。本文介绍了该种电机的总体结构,建立传热三维物理模型和数学模型,给定相关基本假设和边界条件,采用有限元方法对温度场进行了仿真计算,得到了各部件温升的分布规律,并对比分析了不同的机壳材料、冷却介质以及流速等条件下双定子无刷双馈发电机温度分布情况。本文为后续该种发电机冷却系统的设计优化提供了依据。In order to solve the problems of low power density, high transportation cost and poor fault tolerance of the existing wind generator, this paper proposes a new type of cage-barrier rotor coupled double stator brushless doubly-fed wind generator. This kind of generator has rich harmonic magnetic field and large loss, which leads to higher temperature rise during operation. However, the temperature rise has a great influence on various indexes of the generator, so accurate calculation of the temperature rise is crucial. This paper firstly introduces the overall structure of this kind of generator. Then, a three-dimensional physical model and a mathematical model of heat transfer are established. Based on the basic assumptions and boundary conditions, the finite element method(FEM) is utilized to simulate the temperature field and the distribution rules of temperature rise of each component are obtained. Finally, the calculation of the temperature field of the double-stator brushless doubly-fed generator under different casing materials, cooling media, and flow velocity are performed, which provides a theoretical basis for the cooling system design and optimization on this type of generator in the future.

关 键 词：无刷双馈电机 双定子 笼障转子 温升 有限元法 

分 类 号：TM315[电气工程—电机]