In this paper, the breaking transient formulas of terminal voltage and field current of synchronous machine with three phase symmetric load have been derived.

本文导出了同步电机三相对称负载突然拉开，电机端电压与励磁电流在瞬态过程中的解析表达式。

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A mathematical model of transient electric field is deduced, which takes dielectric polarization loss and displacement current into account.

推导出了考虑介质极化损耗和位移电流情况下暂态电场计算的数学模型。

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The formula can reflect the influence of the wavefront steepness of lightning current on the transient magnetic field.

该公式可计及雷电流波头陡度对磁场的影响。

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