感应电机瞬态短路转矩表达式的研究

2014 International Conference and Exposition on Electrical and Power Engineering (EPE) Pub Date : 2014-12-04 DOI:10.1109/ICEPE.2014.6969936

Livia Cociu, V. Cociu

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引用次数: 1

摘要

本文推导并分析了在供电网络三相短路情况下感应电机的瞬变电磁转矩表达式。从短路暂态中定子和转子电流的精确数学表达式出发，建立了电磁转矩的表达式。具有相同低时间常数的两个阻尼分量已被突出显示:一个正弦和一个常数。由于最终表达式形式复杂，为了计算最大转矩值，推导了参数表达式的简化公式。得出了瞬变电磁转矩的性质和持续时间的结论。

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On the transient short circuit torque expression of induction machines

In this paper the transient electromagnetic torque expressions of an induction machine have been deduced and analyzed in the case of a three-phase short circuit of the supply network. Starting from the precise mathematical expressions for stator and rotor currents in the short circuit transient, the expressions of the electromagnetic torque have been established. Two damping components with the same low time constant have been highlighted: a sinusoidal one and a constant one. Due to the complicated form of the final expressions, simplified formulas for parameter expressions have been deduced in order to calculate the maximum torque value. Conclusions regarding the nature and the duration of the transient electromagnetic torque have been drawn.

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2014 International Conference and Exposition on Electrical and Power Engineering (EPE)

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