Research on Stator-Core Temperature Characteristics under Static Air-Gap Eccentricity in Turbo-generator

2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS) Pub Date : 2020-03-01 DOI:10.1109/ICAIIS49377.2020.9194940

Wenqiang Tao, Yuling He, Huan Lei, Wen Zhang, Yue-Xin Sun, Tao Wang

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引用次数: 1

Abstract

The stator-core temperature characteristics under the static air-gap eccentricity in turbo-generator is analyzed and calculated in this paper. Firstly, the theoretical formula of magnetic field density under static air-gap eccentricity is deduced. Then, the calculation formula of hysteresis loss and eddy current loss of the stator-core based on the theoretical formula of magnetic field density is obtained and regular pattern is analyzed under static air-gap eccentricity. Finally the three-dimensional generator model was established to analyze stator-core temperature field distribution under static air-gap eccentricity by Maxwell-Ansys Workbench. The simulation results were consistent with the theoretical analysis, which verifies accuracy of the research method. It is shown that hysteresis loss and eddy current loss of the stator-core will increase due to the increment of static air-gap eccentricity, which further leads to the rise of stator-core temperature.

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汽轮发电机静气隙偏心作用下定子-铁心温度特性研究

分析计算了汽轮发电机静气隙偏心作用下的定子-铁心温度特性。首先推导了静气隙偏心作用下磁场密度的理论公式。然后，基于磁场密度的理论公式，推导了静气隙偏心作用下定子铁心磁滞损耗和涡流损耗的计算公式，并分析了其规律。最后利用Maxwell-Ansys Workbench建立发电机三维模型，分析静气隙偏心作用下定子-铁心温度场分布。仿真结果与理论分析一致，验证了研究方法的准确性。结果表明，静气隙偏心增大会导致定子铁心的磁滞损耗和涡流损耗增大，进而导致定子铁心温度升高。

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2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)

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