Unbalanced Magnetic Pull in Cage Induction Machines for Fixed-Speed Renewable Energy Generators
Unbalanced Magnetic Pull in Cage Induction Machines for Fixed-Speed Renewable Energy Generators
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DOI：
10.1109/tmag.2011.2153185
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发表时间：
2011-09
影响因子：
2.1
通讯作者：
D. Dorrell;J. Shek;M. Hsieh;M. Mueller
中科院分区：
文献类型：
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作者：
D. Dorrell;J. Shek;M. Hsieh;M. Mueller
研究了风力机笼型感应发电机转子偏心引起的不平衡磁拉力问题。这项工作的基本原理是研究减少轴承磨损的方法。本文研究了具有轴向一致性的静态和动态转子偏心，以及不均匀(例如，由于轴承错位)的偏心。对保持架的减振作用进行了讨论，建立了适用于UMP计算的解析模型。对亚同步和超同步UMP进行了研究。研究发现，UMP的特性随存在静态偏心还是动态偏心而不同。还研究了附加阻尼器绕组的使用，发现当电机的动态偏心较轻时，这些附加阻尼器绕组可以显著降低UMP。仿真中使用了先前研究过的10极电机。该分析模型此前已为此进行了验证。模拟范围涵盖电机模式和发电模式(±10%滑移率)。这与UMP阻尼绕组的模拟一起，是对文献的一个很好的贡献，因为它们以前没有被解决过。
The paper addresses unbalanced magnet pull (UMP) due to rotor eccentricity in cage induction generators used in wind turbines. The rationale for the work is to investigate ways to reduce bearing wear. The paper studies both static and dynamic rotor eccentricity with axial uniformity and also non-uniformity (e.g., due to a misplaced bearing). The damping action of the cage is discussed and a suitable analytical model used to calculate the UMP. Both sub- and super-synchronous UMP is investigated. It is found that the characteristic for the UMP varies depending on whether there is static or dynamic eccentricity. A use of additional damper windings is also investigated and it is found that these can help substantially reduce the UMP when the machine is lightly loaded with dynamic eccentricity. A previously investigated 10-pole machine is used in the simulations. The analytical model has previously been validated for this. The range of simulation covers both motoring and generating modes (±10% slip). This, together with the simulation of the UMP damping windings, represents a good contribution to the literature since they have not been previously addressed.