symmetrical load

Taking the error occurring in no-load test of three phase AC traction motor in our company as example, analyzing with symmetrical components method, the main cause of error-three phase non-symmetry and corresponding solutions were given in this paper.

根据本公司轨道交通用三相异步电动机在空载试验时所出现的误差，用对称分量法进行分析，找出电源的三相不对称是三相异步电动机空载试验时产生误差的主要原因，并给出了相应对策。

Examples are given to confirm the coherence of "Steinmeitz compensation" and "symmetrical shunt compensation". The essence of asymmetrical compensation is to eliminate the minus sequence shunt of asymmetrical load current with the compensate current of network.

文章通过实例分析了这两种补偿方法的一致性，指出非对称补偿的实质，是用补偿网络的补偿电流去消除非对称电流中的负序分量。

Based upon displacement and stress analysis on the thin cylinder under axial symmetrical load and taking actual engineering calculation as example the upper beam computational method of elastic foundation is applied in internal force calculation with such structures.

通过对轴对称载荷作用下薄壁圆筒位移、应力分析，以具体工程计算为例，将弹性地基上梁的计算方法推广应用于此类结构的内力计算过程中，其计算方法快捷、准确。

Internal force calculation of thin cylinder under axial symmetrical load

轴对称载荷作用下薄壁圆筒的内力计算

Three equations for satisfying symmetrical condition of voltage or current of threephase three-wire load in the form of rotating factor am and admittance or impedance are introduced.

本文应用旋转因子a~m及导纳或阻抗的形式给出了对称线电压下，满足三相三线负载电压或电流对称条件的三个方程。