查询词典 electric arc process

Analytical results show that: Anode evaporation rate, which determines mostly the production rate of UFMP, is influenced by the many factors including electric parameters of arc, ambient conditions and material properties et al; Existence and increase of anode ejection can influence the production rate and property of UFMP; It is firstly found and investigated that surface connexity phenomenon of Al anode material. Analyses and calculation show that formation of anode spot and existence of self-magnetic field force play an important part in surface connexity process; Effects of cathode material on prepared UFMP is also experimentally studied and theoretically analysed. It shows that effect of the cathode is inconsiderable under the experimental conditions used in the study. At last, the experimental results found in part one are analysed and discussed in detail.

然后详细分析了电弧与电极间的相互作用过程，结果表明：决定超微粉产率的阳极材料蒸发率受许多因素影响，它主要与电弧电参量，环境条件及材料性质有关；阳极表面液滴喷溅的存在和加剧将严重地影响所制超微粉的产率和性质；首次发现和实验研究了Al阳极表面凸起现象，并对此现象进行了详细的理论分析和实际估算，认为阳极斑点的形成及自磁场作用力的存在在该过程中起着重用作用；实验研究和理论分析了阴极材料对所制超微粉的影响，认为在本文所用实验方法及条件下，阴极材料对粉的影响很小。

On the base of practical transformer substation main connection, electric components and system circuit model are first formed in the paper; analyze vacuum arc characteristic and medium resume are analyzed, then, according to vacuum chamber physical process of switching AC arc, resume process are divided into three stages: sheath development, neutral particles diffusion and static characteristic, with that, calculating model of medium resume strength is erected and applied in the computing of vacuum circuit breaker interrupting transform overvoltage; In the paper, Saber software is used to simulate a whole switching process; As follows, overvoltage characteristic of vacuum circuit breaker switching no load and load transformers, kinds of influence factors are analyzed in detail; At last, vacuum circuit breaker switching capacitance group overvoltage formative causes and electrode refining for lessening reignition are discuss.

本文针对中低压变电站的实际主接线建立各电气元件及系统的电路模型；在真空电弧的特点及间隙的介质恢复特性上，依据真空断路器灭弧室分断电弧的物理过程，将真空电弧熄灭后的恢复过程分为鞘层发展、中性粒子扩散和静态特性三个阶段，建立了相应的介质恢复强度的计算模型，应用到切除变压器操作过电压的计算中；采用Saber仿真软件模拟计算真空断路器切除变压器操作过电压；并分别对真空断路器切除空载及负载变压器操作过电压的特点与影响操作过电压的各种因素做了详细的分析；最后简要分析了真空断路器开断电容器组过电压的形成原因及为减少重燃的电极老炼措施。

The former can be used to make the instructions in advance according to the information of the production tasks of electric arc furnaces and this convertor, which is suitable to the producing conditions of being short of on-line testing equipments, the later can correct the operating parameters according to the information of on-line testing equipments in the process of blowing The results of computer imitating and on-the-spot debugging make clear that the ratio of cold material and the rate of negotiable metal recovery will be improved a lot if we operate convertors in accordance with the computer instructions made by the software system.

前者可根据矿热电炉生产任务安排和本炉吹炼任务等信息预排操作指令表，用于目前无在线检测设备的生产条件；后者可在操作过程中根据在线检测信息修正相关操作参数。计算机仿真及现场调试结果表明：按照该软件系统产生的指令进行操作，可使冷料率、有价金属回收率等生产指标得到明显的提高。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。