机床电器-成都机床电器研究所 关键词：电机智能保护；对称分量法；保护算法 [gap=609]Key words：intellective protection;symmetrical component method;protective arithmetic
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Two methods to calculate the zero sequence current are deduced based on the symmetrical component method.
根据对称分量法，推导了两种软件计算零序电流的方法。
And, the equivalent current algorithm for the electric motor heat accumulation is proposed based on the symmetrical component method.
同时根据对称分量法的基本原理，提出以等效电流作为电动机热积累计算的依据的算法。
Equivalent current method different from symmetrical component method and revolving field method, is used for performance calculation on capacitor single phase motors on this paper.
与传统的对称分量法及旋转磁场法不同，本文用等效电流法对电容运转形式的单相电机进行了性能计算，主要推导出了主、副相电流的计算公式。
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