高性能的铜带坯水平连铸线控制系统

介绍用交流伺服变频调速器SIMOVERT（SC）,通用变频器M．Master和可编程序控制器S7－300组成的铜带坯水平连铸生产线控制系统。系统中应用智能模块FM354进行银带坯的闭环位移控制,配置的多台PLC之间采用多点通信接口（MPI）建立全局数据通讯,设置的PC／PG既作上位监控器,又作PLC的编程器。该系统具有结构简单合理,可靠性高,自诊断功能完善等特点。     

PROFIBUS-DP在矿井提升电控系统中的应用

简要介绍了PROFIBUS＿DP现场总线及PROFIBUS＿DP现场总线控制系统的实现。主站、各从站的配置,功能介绍及应用调试。     

基于PROFIBUS-DP总线的变频器控制系统

PROFIBUS是多种总线中的一种,它具有较广的制造基础和较多的使用经验,它的应用领域包括加工制造、过程和建筑自动化,如今已成为国际化的开放式现场总线标准,即EN50170欧洲标准和IEC61158国际标准的一部分。     

交流伺服系统在铜带水平连铸机中的应用

本介绍一种采用交流伺服和PLC网络的控制系统，应用在铜带水平链铸生产机列上，提高了系统精度、稳定性和可靠性，且系统结构简洁，维护方便，从而提高了较水平连铸机列的技术水平。     

现场总线数据采集系统

文中分析PROFIBUS-DP现场总线的协议结构和报文格式,根据Package4开发软件包构建一个具有一个主站和两个从站的数据采集系统,利用COM PROFIBUS组态软件完成对系统的硬件组态,通过DPMT软件获得实验数据.     

采用现场总线的全交流复卷机电控系统的设计与应用

在简要分析了Winbelt-M复卷机控制要求后，设计了一套采用PROFIBUS-DP现场总线的全交流复卷机电控系统。阐述了具体的控制方案和采用的主要控制策略，其中主要包括纸幅张力控制、复卷力控制、纸幅速度控制、压纸辊压力控制、皮带床张力控制等。实际应用效果证明了该系统的有效性和实用性。     

钻机电控系统PROFIBUS-DP总线通讯故障树分析

钻机电控系统PROFIBUS-DP总线通讯故障树分析,是快速诊断总线通讯故障的一种新方法。针对总线通讯网络并结合现场使用情况,建立PROFIBUS-DP总线通讯故障树。利用定性分析,求出总线通讯故障的最小割集和结构重要度。并对通讯故障影响因数进行了重要度排序,找出了薄弱环节,为钻机电控系统管理和维护人员提供参考依据。     

交流变频钻机中PROFIBUS—DP总线技术的应用

介绍了交流变频钻机电控系统中PROFIBUS现场总线的应用 ,并以ZJ30DBS系统为例描述了现场总线网络组成及其优点     

PLC及其网络在小方坯连铸机自动控制系统中的应用

文章归纳和总结了GEPLCE及其工业以太网、Genius Field Control现场总线和多媒体技术在某钢厂1＃方坯连铸机自动控制系统中的具体使用和经验。     

采用现场总线的全交流复卷机电控系统的设计与应用

在简要分析了Winbelt-M复卷机控制要求后,设计了一套采用PROFIBUS-DP现场总线的全交流复卷机电控系统。阐述了具体的控制方案和采用的主要控制策略,其中主要包括纸幅张力控制、复卷力控制、纸幅速度控制、压纸辊压力控制、皮带床张力控制等。实际应用效果证明了该系统的有效性和实用性。     

Thermolite electric-insulating system for electric machines

A Thermolite electric insulating system of heat-resistance classes H and C is tested and the test results are presented. It is shown that the developed insulating system makes it possible to increase the motor’s power compared to traditional systems.     

A high-performance edge heater for the hot strip mill

A transverse magnetic flux type of induction edge heater for hot strip mills that can sufficiently heat the edge portion of a transfer bar from the very head end to the very tail end was developed. This was accomplished not only by applying the magnetic flux leakageless C-type edge heater that consists of a single magnetic circuit but also by developing an algorithm for setting the optimum air gap between the upper and lower inductors and the firing angle compensation circuit. This circuit enables the main power source thyristor inverter to be operated even when the applied load is so light that the thyristor devices of the inverter cannot commutate without the circuit. Mechanical characteristics inspections of hot strips heated by the edge heater show that the elongation characteristic of the edge parts is improved from the head to the tail end of hot strips. From this it is possible to obtain uniform distribution of the elongation characteristic all along both the width and length of hot strips. Thus, the contribution of the new edge heater to the improvement of the quality and yield rate of hot strips has been confirmed     

A control system for thermal zones of electric resistance furnaces

A functional diagram of a temperature controller of electric resistance furnaces with temperature difference compensation in thermal zones by means of automatic correction of power arriving to the thermal zone is given. The additional power required for compensation of the temperature difference in thermal zones of the furnace is determined. The power depends on the temperature difference between thermal zones during heating, heating temperature, and given permissible temperature difference between thermal zones. Dependences of the relative additional power upon the temperature difference between thermal zones at heating temperatures in a range of 700–1600°C and permissible temperature differences between thermal zones 5, 15, 30, and 50°C are determined. Recommendations on the control system adjustment are given. The adaptive control system for thermal zones of electric resistance furnaces is developed.     

A robast digital control system for an asynchronous electric drive

Polynomial methods for synthesizing robast digital regulators of a frequency-controlled asynchronous electric drive are considered. It is shown that the use of robast regulators makes it possible to significantly reduce sensitivity to changing object parameters and increase the adjustment of disturbing actions. The possibility to create qualitative systems for an electric drive without a unit of compensating cross connections is grounded.     

Modern electric insulating materials for the insulation systems of rotating electric machines

Modern insulation systems of turbo- and hydrogenerators, large electric machines, and traction motors based on new electric insulating materials (EIMs) produced by the JSC Elinar Holding Company (Elinar HC) are described briefly. The technical characteristics of some new EIMs are given.     

条码监控系统设计

随着物流技术的发展，条码检测已越来越多被采用。基于S7-200PLC的条码监控系统在上位机的监控下，对采集的条码信息进行处理，利用PLC控制物流，并把信息上传，使系统工作效率大大提高，节约人力物力，有广泛应用前景。     

Modelling of induction machines for electric drives

The author presents several linear and nonlinear models suitable for transient and steady-state analyses of induction machine drives. The models are presented in equivalent circuit form to preserve the identity of nonlinear parameters. The circuits, designated as Γ or inverse Γ form, are simpler than the conventional T-form circuit. Their parameters are readily determined from terminal measurements. The major effects of magnetic nonlinearity are included in the models in a way that is more accurate than that usually obtained with the conventional T-form circuits. Modeling of time harmonics is also discussed     

A method for assessing technologies for production of electric machines at the design stage

A method for assessing production technologies based on an estimation information model is proposed. This method is considered using as an example technology for the production of single-phase induction motors. Results of potential simulation enable one to determine requirements for the new production process and develop proposals for their optimal implementation.