Numeric Analysis of the Influence of Opening Speed on Arc Erosion of Contact 分断速度对触头电弧侵蚀影响的数值分析
Silver metal oxide Arc Contact material; 银金属氧化物;电弧;触头材料;
The switch contactors and connecting terminals of the low voltage switchbox can occur failure arc easily for the loose contact. 低压配电箱中的开关触点和接线端子因接触不良容易产生故障电弧。
Effect of doping on electrical arc characteristic of WCu electrical contact materials 掺杂对WCu电触头材料电弧特性的影响
Ultrasonic Nondestructive Testing Method for Arc Surface Electric Contact 弧形触头的超声无损检测方法
The switch is not only when switching over with production of electric arc, mechanical contact head easy to be damaged, but also it is slow to regulate, can't frequently operate, so limit the range of application of this kind of switch. 这种开关不仅切换时伴有电弧的产生,机械触头容易损坏,而且调节速度慢,不能频繁操作,因此限制了这种开关的应用范围。
Study on Ultrasonic C-scan Image Correction in Nondestructive Evaluation of Arc Surface Electric Contact 弧形电触头超声C扫描图像校正问题的研究
Investigation on Fuzzy Evaluation of Electrical Life and Electrical Arc Erosion Characteristics of Contact Materials of Switchgears Used in Coal Mines 矿用开关电器触头材料电弧侵蚀特性与电寿命的模糊评价研究
It is found that the superposition of surface echo on the defect echo during the sampling process, which is caused by the special structure of arc surface contact, results in the non-uniform background in C-scan image. That is the key reason influencing the C-scan image quality. 通过分析发现,由于弧形触点特殊结构的影响,在对缺陷回波采样过程中叠加的表面回波分量在C扫描图像中形成了不均匀分布的图像背景,这是影响C扫描图像质量的主要原因。
The SEM analysis shows that there is less impurity and porosity and few oxide on the fracture surface of the CuW/ CrCu arc contact manufactured by vacuum sintering, which may lead to the high joint strength of CuW/ CrCu arc contact. 通过对断口的扫描电镜分析,发现真空烧结的触头材料结合面杂质含量。少、无氧化物、孔隙少,这可能是导致真空烧结CuW/CrCu触头材料盼结合强度高的主要原因。
Effect of Arc on Contact Material in the Process of Arc-remelting 电弧重熔过程中电弧对触头材料的作用
According to the results of finite element analysis and the temperature measurement of the tested pantograph pan, the effects of different heat sources caused by electric arc, contact resistance and friction were studied systematically on various pantograph pan materials. 文章采用有限元计算与实测温升相结合的分析方法,系统研究了不同热源(包括电弧热、接触电阻热、摩擦热以及体电阻热)对各种滑板材料体温升的影响。
The technical development of AC contactor, including the intelligent contactor, zero arc erosion of contact, new performance required due to power quality, as well as the new design and technical parameters of contactor were introduced in this paper. 基于智能接触器的发展、触头零电弧侵蚀机理,从电力质量对接触器的新的性能要求以及最新的产品设计和技术参数等几个方面,介绍了交流接触器技术发展动态。
This paper studied the nonlinear relationship between the DC arc duration, arc energy and contact breakaway velocity, circuit current, circuit voltage. By using FPC network model and fuzzy C mean method, the method of modeling for the nonlinear relationship was presented. 本文研究了直流电弧燃孤时间及燃弧能量与触头分离初速度、回路电压及回路电流之间的非线性关系,采用模糊对向网络模型以及模糊C均值算法,给出该非线性关系的模糊建模方法。
The structures of the electric field shielding ring, arc contact, main contact and nozzle etc. 主要对均压环、弧触头、主触头、喷口等结构进行了优化及分析,分别进行了讨论。
Based on the analysis, the arc surface contact was C-scanned firstly, and then a second-order polynomial was used to fit the non-uniform background. The C-scan image was corrected by removing the fitted background. 基于上述分析,首先对弧形触点进行超声C扫描成像,然后采用二次多项式拟合了图像的不均匀背景,并根据拟合结果校正了C扫描图像。
And also, the electric arc erosion of contact materials is engendered by heat effect of arc and other discharge phenomenon during the open and close of electric contact materials. 还发现触头材料的电弧烧损主要是触点在断开和闭合的过程中,产生电弧或其它放电现象的热效应所造成的。
Study on Joint Tensile Strength of CuW/ CrCu Arc Contact CuW/CrCu触头材料抗拉强度的研究
The processing principle and the experiment system and results of arc remelting for the contact material of vacuum switches are described in this paper. 本文介绍了真空开关触头材料电弧重熔工艺原理和电弧重熔系统及实验结果。
The relations between material transfer and come parameters are given in the form of characteristic curves. Based on the theory of electric arc and contact, the mechanism of direction reverse of material transfer is discussed. 在触头试验机上进行了大量试验,得到了触头材料转移的特性曲线,并运用电弧及电接触基本理论,对材料转移方向反转进行了理论探讨。
Kinematics Research on the Friction-Transmission Be-tween Arc-contact Rotators 圆弧接触线回转体摩擦传动运动学研究
The traditional C scan systems usually bring a distortion image that is deleterious to the reliability and resolution, and result in wrong conclusion in non destructive testing when detect the arc surface contact. 对于弧型表面,以往的超声C扫描造成图象失真,影响检测可靠性和分辨率,产生误检。
The energy input from arc to contact surface is a decisive factor on erosion of contact materials. 电弧对触头表面的能量输入是影响触头侵蚀量的决定因素。
This paper emphasizes on the influences of arc energy by the contact breakaway initial velocity that is the velocity of moving contact at the time of moving contact and stationary contact breaking. 研究了触点分离初速度(动触点与静触点刚刚分离时刻的动触点速度)对电弧能量的影响。
Research on the Technology of Adaptive Focusing for Arc Surface Electric Contact Ultrasonic C scan Detection 弧型电触头C超检测系统自适应聚焦技术研究
Since insufficient theoretic study on arc erosion, selecting contact material is mainly depend on experiments, which is quite expensive and time-consuming. 电弧侵蚀的复杂性和理论研究的不足,导致触头材料的筛选主要依靠试验,周期长、投资大,不利于新材料的开发。
In this paper, an accurate equation to the arc of contact in rolling is established and transformed into explicit function by using the root of quad-ratic equation. 建立了轧制变形区接触弧精确方程并由二次方程求根公式将其化为显函数。
The automatic production of the double circular arc gear contact computation finite element model was realized used the corresponding computational procedure established by finite element software ANSYS in to inlay the language. 采用有限元软件ANSYS的内嵌语言编制相应的计算程序,实现双圆弧齿轮接触计算有限元模型的自动生成。
During the closing/ opening of vacuum circuit breaker, arc contact is first closed and post breaking, however, main contact is post closed and first breaking. So there must be the current transfer process. 当断路器在(合闸-分闸)动作过程中,弧触头先合后分,而主触头后合先分。因此,新型大电流真空断路器开断时主、弧触头之间必然存在电流转移过程。
After simplifying subway power supply system, the circuit introduce Mayr arc as the Main contact of the DC breaker, do research both on the traditional DC breaker and the new DC breaker based on the matlab platform. 该电路将实际地铁供电系统简化后,引入麦也尔(Mayr)电弧模型作为直流断路器主触头,在Matlab平台上对传统直流断路器和新型直流断路器进行仿真研究。