武钢2250轧机用电动机产品试验及性能分析计算

本针对轧钢电机的发展现状和趋势，介绍武钢2250轧机用立式同步电动机的型式试验及性能分析计算数据，为轧钢电机的发展提供了有价值的技术参考。     

大型变频调速异步电机的设计

介绍了大型变频调速轧钢用异步电动机的电磁参数和结构特点,主要论述该型号电机的定子机座、定子绕组、轴承等主要部件的选型及设计过程,通过试验参数与设计参数的数据对比,验证了该电机设计的优越性,证实了该大型变频调速电机更加高效节能。     

变频调速三相异步电动机的试验

变频调速三相异步电动机(以下简称电机)是由变频器做电源对电机进行供电,变频器输出电量测量对传感器及仪表具有特定的要求。应试验的项目和方法大部分与普通电动机相同。重点介绍电机试验的特殊要求及增加的试验项目和有关试验方法。     

变频调速轧钢同步电动机的试验及性能的计算分析

主要介绍国内首台最宽半连续隐极热轧变频调速轧钢同步电机的型式试验及试验数据和性能分析，并详细介绍了性能分析计算的过程，为同类电机的发展提供一些有价值的技术参考。     

交交变频轧钢电动机及运行概况

近年来引进联邦德国西门子公司交交变频同步轧钢电动机已陆续投入运行,在节电、增产和降低运行费用等方面均取得较好的效果。本文概要介绍整个变频传动装置及电机情况,并分析其运行特点,最后提出存在的主要问题。     

变频器试验机组用异步电动机的设计

介绍了变频器试验用电动机的基本要求,主要参数及整体结构。结合本设计经验简述了电动机的电磁方案初步设计以及对此种电机电磁设计的考虑。对此种电机区别于普通变频异步电动机之处做更进一步阐述。对机组电动机的整体结构做出了合理设计,为变频器试验机组用异步电动机提供了设计思路。     

电机铁损试验的新技术

1 前言随着电机技术的不断发展,对新的大型交直流电动机的铁损试验技术和试验方法提出了新的课题。不久前,在为上海宝钢生产2050轧钢电机9000KW16极同步电动机和2×5000kW直流电动机,以及为武钢生产42000kW两极同步电动机的过程中,采用了新的铁损试验技术和新的铁损试验方法。这在我国目前还是首次。它与我国目前标准要求有所不同,弥补了我国标准的不足,从而使其测得的结果趋于精确,消除了误差。为此,采取了必要的修正方法。     

宝钢1580热连轧机大电机的合作生产

本分析了１５８０轧机用大型变频调速电动机的技术水平，结构特点以及良好的产品性能和质量，合作生产取得了显成铲，加快了我国交流传动系统大型轧钢电机的技术发展。     

ACTS2000异步牵引电动机试验系统

介绍了ACTS2000异步牵引电动机试验系统的试验能力以及电源系统、负载系统、测量与控制系统等部分的主要内容.同时介绍了测控系统的软件结构,该试验系统可满足各种型号异步牵引电动机及工业传动用变频电机试验的需要.     

BPY1250—10／160型1250kW1200V交交变频变速异步电动机

叙述了用于长城钢厂轧钢的逆变器供电的交交变频大型异步电动机研制过程中的技术问题及其解决方案，这些技术问题的解决保证了电机达到设计要求和满足用户需要。     

Mill motors for adjustable-speed AC drives

The use of AC adjustable-speed drives for rolling mill applications is addressed. AC motor characteristics and how they relate to adjustable-speed mill drives are described. A review of AC motor theory highlighting distinctions between induction and synchronous machines along with comparisons to DC motor performance is included. Constant power speed range performance and limitations, damper winding requirements, and the selection of motor variables such as terminal voltage and frequency are discussed     

Analysis of Transient Firing Angle in Reversible Thyristor Drive Speed Regulator for Mill Motor

When designing a high-response thyristor-drive speed regulator with internal multicontrol loops for a rolling mill motor, the behavior of the transient firing angle must be taken into consideration to ensure consistent thyristor switching, which is often neglected, and to achieve the required dynamic performance. The critical conversion modes in which the minimum transient firing angles in rectification and inversion may appear in a dual thyristor converter for four-quadrant motor drives are clarified. Two methods of analyzing the transient firing angles in the critical conversion modes and the results of calculations of the minimum transient firing angles under specified operating conditions are also presented. The calculated results are verified in laboratory tests.     

Transient stability study of the large synchronous motors starting and operating for the isolated integrated steel-making facility

This paper presents the influence of the large motor starting and the large rolling mill operation on the isolated integrated steel cogeneration facility by executing the transient stability analysis. The system configuration of the steel facility is introduced first. Furthermore, the proper mathematical models and the accurate parameters of the cogeneration units, excitation systems, and governor systems are investigated in detail. Both the static and dynamic load models are applied in this paper. To reduce the starting current of large motors, the conventional step-down voltage method by adjusting the suitable tap position of the autotransformer and the constant magnetic flux control method by using the variable-voltage and variable-frequency inverter are considered in the computer simulations. Also, the system voltage and frequency fluctuations due to the operation of the rolling mill are observed and investigated carefully to verify that the isolated cogeneration can be operated well and safely.     

宝钢第三热轧线液压活套控制方式实现

宝钢第三热轧线活套采用新型伺服液压系统,比其它两条热轧线活套马达控制方式响应更快、精度更高。三热轧活套控制系统除了传统控制方式之外,还有较为先进的张力与角度结耦控制的ILQ控制方式,前机架间还可以选择投入微张力控制。针对三热轧活套的特点,对活套的控制方式和时序进行研究分析,提高活套在生产过程中的稳定性。     

预见PWM控制在轧机调速系统中的应用

首先介绍了单传动轧机主传动调速系统的硬件结构,然后阐述了最优预见PWM控制原理及其工程应用。预见PWM控制新技术在轧机主传动调速系统中的成功应用解决了在采用PWM技术载波频率较低的情况下波形失真较高的问题,消除了脉动转矩,提高了控制精度,延长了功率开关器件的使用寿命。实践证实了这一新技术的有效性。     

KOCKS张力式减径机组水冷电机国产化

介绍了将159FQM连轧机上的国产水冷电机在改换轴承后,用至KOCKS三辊张力式减径机上,实现该进口水冷电机的国产化。     

ACS 6000SD交流变频控制系统在高速线材生产线的应用

结合ACS 6000SD中压三电平电压型矢量控制交流变频传动装置在马钢集团公司高速线材厂高速轧机上的应用,详细介绍了ACS 6000SD中压交流变频装置整流器和逆变器的基本特点、工作原理,以及在高速轧机上的使用效果。充分显示了其优异的性能、很高的可靠性,是大、中型电机拖动系统较为理想的传动装置。     

浅析电动机滚动轴承选型及配置

从电动机常用滚动轴承分类、寿命和润滑剂的选择等方面,简单介绍了电动机滚动轴承的选型要素。以某钢厂定宽压力电动机项目轴承设计为例,针对电机运行工况和轴向载荷复杂的特点,合理选择电机轴承配置,实际运行验证了此轴承选型的有效性和可靠性。     

交—交变频交流调速

本文介绍用于冷轧主传动交-交变频交流调速装置的变频器、矢量控制系统和电机模拟器及展望。     

Two-degree-of-freedom robust speed controller for high-performancerolling mill drives

A scheme is presented for the speed control of rolling mill drives. The proposed speed controller is based on a two-degree-of-freedom (TDF) structure and uses an observer-based state feedback compensator for the major control loop. The control method yields a robust system with respect to system uncertainties and modeling errors and is very effective for vibration suppression. Experimental verification was carried out on a prototype rolling mill minimodel system. The experimental drive system has a three-mass-model structure (motor-gear-load) connected by low stiffness shafts. The mechanical resonances and the inertia ratios between the motor, gear, and load are comparable to those of an actual rolling mill system (resonant frequencies are at 17.4 Hz and 51.3 Hz). The proposed scheme was compared to the conventional PI controller and the performance of each scheme is presented. A high closed loop speed bandwidth was obtained with the proposed TDF speed controller