最后给出了三相牵引变压器的过载能力曲线组，供设计、运行单位使用。

A group of overload capability curve of three-phase electric traction transformer is given for use by design and operation units.

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为避开三相交流异步电动机和变频器的数学模型，利用飞升曲线法简单近似确定各环节的数学模型。

For avoiding the math models of three-phase AC electromotor and frequency inverter, adopt the simple similarity of ascending curve method to ensure the math models of every loop.

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整个三相铁芯由三条曲线硅钢带料卷制而成，中间无气隙及接缝，油箱采用低损耗、低激磁电流、低噪声等特点。

Whole three-phase core is made of three curved silicon steel belt material through rolling, without clearance and seam. The tank has features of low loss, low exciting current, low noise and others.

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