Closed solution of the transient skin effect in induction machines
Closed solution of the transient skin effect in induction machines
复制标题
感应电机瞬态集肤效应的封闭解
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Pierre Köhring
中科院分区：
文献类型：
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作者：
Pierre Köhring
求解了含有大质量导体的矩形开口和半封闭槽的瞬态集肤效应。该解决方案适用于焦耳损失和气隙转矩和定子电流的感应电机暴露于三相短路的分析计算。在瞬态条件下的焦耳功率损耗的计算已经完成，特别是，对于中等和高功率范围的感应电机。这在动态控制的感应电机中变得重要，特别是当发生大约100 ms或更少的转矩周期时。以前从未在这些瞬态条件下对铜损进行过完整的评估。对于损耗的计算，可以使用转矩和转子条电流之间的损耗的直接比例。此外，瞬态集肤效应的结果可以在感应电机的操作行为中找到应用。在计算电流和转矩时，必须考虑转子的瞬态集肤效应。到目前为止，现有技术仅提供了无趋肤效应模型的解析解。针对给定的转子几何形状，本文推导了一种包含瞬态集肤效应的方法，并将其应用于空载运行的感应电机的三相短路。
The transient skin effect is solved for the rectangular open and semi closed slots containing a massive conductor. The solution is applied to the Joule losses and to the analytical calculation of the air gap torque and the stator currents of the induction machine exposed to the three-phase short circuit. The calculation of the Joule power losses under transient conditions has been accomplished, especially, for induction machines of the middle- and high-power range. This becomes important in dynamically controlled induction machines, especially when torque cycles of approximately 100 ms or less occur. Never before have the copper losses been evaluated completely under these transient conditions. For the calculation of the losses, the direct proportionality of the losses between torque and rotor bar current can be used. Furthermore, the results of the transient skin effect can find application in the operational behavior of the induction machine. The consideration of the transient skin effect of the rotor is necessary for calculating currents and torques. Until now, state of the art has only provided an analytical solving of the skin effect free model. Aiming to apply the given rotor geometry, this paper derives an approach which includes the transient skin effect, applying it on the three-phase short circuit of the idle running induction machine.