Abstract

This article is devoted to development of synthesis of power drive system of KhPT-250 cold rolling mill. Selection procedures for process variables of the reducer, electric machine, and power circuits have been developed. It has been noted that the configuration of power circuits can decrease failures by about 30%. It has been demonstrated that, in the power drives of the KhPT-250 mill, it is required to take pipe deformability into account and the control object should be considered as a multicircuit double-mass system. It is proposed to select the gear reduction rate on the basis of the criterion of minimum oscillation. With this aim in mind, the methods of frequency synthesis have been applied to construct asymptotic frequency characteristics used for determination of the reducing gear factor in the case of a restricted amplitude of the resonance maximum. Using the finite element method, the geometrical parameters of the stator and rotor of a synchronous reluctance machine have been selected, and its weight and dimensions have been improved by about 35%. Predictions demonstrate that the best ratio of the flow longitudinal constituent to the transversal constituent is obtained for a axially laminated rotor. Implementation of a power drive system with a field regulated synchronous reluctance motor on a KhPT-250 cold rolling mill made it possible to increase the mill output by 10–15%, with the quality of rolled products improving by 20–25%. According to preliminary estimations, the annual efficiency of the power drive system will be from 2 to 5 million rubles.

中文翻译：

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KhPT-250冷轧机的管道旋转和输送机构动力驱动系统

摘要

本文致力于KhPT-250冷轧机动力传动系统的综合开发。已经开发出用于减速器，电机和电源电路的过程变量的选择程序。已经注意到，电源电路的配置可以将故障减少约30％。已经证明，在KhPT-250轧机的动力驱动装置中，需要考虑管道的可变形性，并且控制对象应被视为多回路双质量系统。建议基于最小振动的标准来选择齿轮减速率。有了这个目标，在共振最大值的振幅受限的情况下，已经采用频率合成的方法来构造渐近频率特性，以确定减速比。使用有限元方法，选择了同步磁阻电机的定子和转子的几何参数，并将其重量和尺寸提高了约35％。预测表明，对于轴向叠片转子，可以得到最佳的流动纵向分量与横向分量之比。在KhPT-250冷轧机上实施带有磁场调节同步磁阻电机的动力驱动系统，可使轧机产量提高10％至15％，轧制产品的质量提高20％至25％。根据初步估算，