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Assessing the Effects of Induction Rotor Transient Heating on Shaft Interference Fit During Force-Stopped Condition

机译:评估力停工况下感应转子瞬态加热对轴干涉配合的影响

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摘要

This article investigates the design and finite element analysis of minimum interference fit between the shaft and motor rotor, against force-stop condition, to avoid slip at the interface during transient heating of the rotor. This condition occurs when the shaft is locked from rotation and the rotor is subject to the current induced by locked rotor for a certain period of time. Precise assessment of this time period is crucial for the protection of the induction motors, so that protective circuits can be designed to interrupt the current before this time is reached to avoid a spun shaft. The close to reality representative finite element analysis of such a system can offer many advantages during the design phase by eliminating the need for actual experiments, thus reducing both design cost and time. In this article, such a representative model is built and the required design requirements are demonstrated on the example induction motor rotor for two different interface fit values with friction.
机译:本文研究了轴和电动机转子之间的最小过盈配合(针对力停止条件)的设计和有限元分析,以避免在转子瞬态加热期间界面处打滑。当轴被锁定旋转时,并且转子在一定的时间段内承受由锁定的转子感应的电流时,会发生这种情况。精确评估该时间段对于感应电动机的保护至关重要,因此可以设计保护电路以在达到该时间之前中断电流,以避免轴旋转。这种系统的接近现实的有限元分析可以在设计阶段通过消除实际实验的需求而提供许多优势,从而减少设计成本和时间。在本文中,建立了这样一个具有代表性的模型,并在示例感应电动机转子上针对两个带有摩擦的不同接口配合值演示了所需的设计要求。

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