大型并联电抗器的电磁场综述及受力的仿真

对大型并联电抗器的漏磁场特性和电磁结构特点进行了系统讨论,对并联电抗器的几种计算方法进行了分析对比,并运用节点力的方法计算了电抗器铁心的受力情况。     

一种新型自动扶梯智能旁路变频器

提出了一种新型自动扶梯用变频器．并介绍了变频器硬件结构和自动扶梯应用系统结构以及PID同步算法。试验结果表明．新型自动扶梯智能旁路变频器可以实现变频到工频的平稳切换。     

安全联锁系统在二硫化碳化工装置中的应用

阐述了安全联锁系统在化工装置中的重要性,重点介绍ESD紧急停车系统的基本结构、主要功能,介绍联锁控制的实现过程。     

DS5系列高压无功自动补偿装置在318变电站的应用

变电站高压电容自动补偿问题,结合工程实例,文章介绍DS5系列高压无功自动补偿装置的组成及主要技术指标、性能特点、工作原理、保护与控制、电容器维护等方面的内容。对高压电容自动补偿装置有关如何科学确定并联电容器的容量配置、电压等级、分组情况、结构类型等技术问题进行初步探讨。     

反馈放大器的快速判断法及几种记忆口决

本文介绍了反馈类型的几种快速判断方法,提出了几种记忆口决,并作出了解释.     

An experimental technique to measure the shunt resistance across a local region of a floating junction

The inclusion of a floating junction (FJ) at the surface of a solar cell is one way to obtain good-quality surface passivation. The development of FJ-passivated solar cells, however, has been hindered by the frequent occurrence of shunting across the FJ. Shunting can occur at specific regions of the FJ, such as at isolated points of the base contact or at the edges of the solar cell. This paper presents an experimental technique to determine the shunt resistance across local regions of an FJ, thereby providing a means to compare the prevalence of shunting in one region to another. By locating and quantifying the shunting in specific regions of an FJ, valuable insight into its cause can be obtained.     

自愈式高压并联电容器的内熔丝保护和寿命试验研究

对自愈式高压并联电容器运行中的主要缺陷进行了研究，明确了局部放电影寿命的主要原因，采取了新的保护措施，使得自愈式高压并联电容器元件顺利地通过了耐久性试验。     

并励直流发电机外特性拐弯现象的直观解释

利用并励直流发电机的并励特点,变空载特性的横坐标If为U,巧妙地建立起电枢电势与端电压之间的关系—EU关系,进而建立确定端电流的EU比较式。通过EU的比较,给出了并励直流发电机外特性拐弯现象的一个直观解释。     

设计HLS储存环高频腔的有限元分析

描述了对ＨＬＳ储存环设计高频腔进行有限元结构分析的过程和得到的结果,诸如位移,应力,温度场,热应力,热变形,以及机械固有频率和主振型先进。这些量对高频腔水冷和结构设计有十分重要的意义。     

Effect of the rotor cage chassis on inner flow field of a turbo air classifier

As the connection between the center of rotor cage and the coarse powder collecting cone, rotor cage chassis of the turbo air classifier directly influences airflow movement in the classifier. In order to study the effect of rotor cage chassis on the inner flow field of a turbo air classifier, the flow fields of four rotor cage chassis structures with different opening size are simulated and compared using ANSYS-FLUENT 17.0. The simulation results show that there is “bypass flow” phenomenon for the classifier with the open rotor cage chassis, compared with the closed rotor cage chassis. The “bypass flow” phenomenon can change the airflow velocity distribution of the annular region. For the open rotor cage chassis, its opening size has no significant effect on the flow field distribution and the airflow velocity. However, the open or closed rotor cage chassis has great effect on the flow field distribution and the airflow velocity. The calcium carbonate classification comparative experiments are carried using the open and closed rotor cage chassis structures. The experiment results show that the open rotor cage chassis can decrease the cut size, and the closed rotor cage chassis can improve the classification accuracy.