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首页> 外文会议>International Symposium on Stability Control of Rotating Machinery(ISCORMA-4); 20070827-31; Calgary(CA) >SIMULATION OF THE EFFECTS OF THE UNBALANCED MAGNETIC PULL IN FOUR-POLES SLIM GENERATORS
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SIMULATION OF THE EFFECTS OF THE UNBALANCED MAGNETIC PULL IN FOUR-POLES SLIM GENERATORS

机译：四极薄发电机中不平衡磁拉效应的模拟

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摘要

Among non linear effects affecting electrical power plant rotating machinery the phenomenon of the so called unbalanced magnetic pull (UMP) is probably the most common. UMP occurs in the generators due to the not uniform radial distribution of the air gap. In practice, even if generator rotor and stator have been carefully aligned, the effect of the weight, the fact that the generator operates over its first critical speed and the inevitable dynamic unbalanced forces determine a radial distribution of the air gap that is not uniform and this causes a net electromagnetic radial force. This paper introduces a non linear model for the calculation of the UMP in synchronous electric machines and presents an application to a turbo-generator of 900MW with a four poles generator.
机译：在影响电厂旋转机械的非线性效应中，所谓的不平衡磁拉（UMP）现象可能是最常见的。由于气隙的径向分布不均匀，发电机中会产生UMP。实际上，即使发电机转子和定子已经仔细对准，重量的影响，发电机在其第一临界速度下运行以及不可避免的动态不平衡力这一事实也决定了气隙的径向分布不均匀，并且这会产生净电磁径向力。本文介绍了一种用于同步电机UMP计算的非线性模型，并将其应用于具有四极发电机的900MW涡轮发电机。

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