| 水轮发电机端部各向异性涡流场分析的数学模型 |
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| 引用本文： | 李书芳,姚若萍,高景德. 水轮发电机端部各向异性涡流场分析的数学模型[J]. 清华大学学报(自然科学版), 1997, 0(10) |
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| 作者姓名： | 李书芳 姚若萍 高景德 |
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| 作者单位： | 清华大学电机工程与应用电子技术系，北京邮电大学电信学院环境电磁学研究所 |
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| 基金项目： | 国家自然科学基金,机械工业发展基金 |
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| 摘 要： | 为合理设计大型水轮发电机端部结构，考虑到叠层结构定子铁芯的各向异性及非线性，建立了包括定子铁芯边段在内的水轮发电机端部涡流场分析的数学模型。提出了边界条件处理的新方法。在求解变量的选择上，采用了在不同的求解区域分别引入不同的求解变量——在涡流区用修正矢量磁位，在非涡流区用标量磁位，使计算量大大减少。与以前不包括定子铁芯的端部涡流场分析模型相比，该模型能更准确地计算铁芯边段附近的磁场，故该模型对于研究大型水轮发电机的端部损耗及局部过热具有重要意义。
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| 关 键 词： | 水轮发电机；端部涡流场；各向异性；修正矢量磁位；标量磁位 |
Mathematical model to analyze the anistropic magnetic field in the end region of hydraulic generators |
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| Li Shufang,Yao Ruoping,Gao Jingde. Mathematical model to analyze the anistropic magnetic field in the end region of hydraulic generators[J]. Journal of Tsinghua University(Science and Technology), 1997, 0(10) |
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| Authors: | Li Shufang Yao Ruoping Gao Jingde |
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| Affiliation: | Li Shufang,Yao Ruoping,Gao Jingde Department of Electrical Engineering,Tsinghua University,Beijing 100084 |
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| Abstract: | The mathematical model to analyze the hydraulic generator's end region field is proposed. The stator's end packets are included, the anisotropic and nonlinear stator iron core is considered. A new method to treat the boundary conditions is presented. By introducing modified vector magnetic potential and scalar magnetic potential in different regions, the calculation volume is cut down greatly. Compared with the previous models, the model can calculate the field near the end packets of stator core more accurately. The model has great significance in studying the loss and local over heating in the end region of large hydraulic generator. |
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