The Calculation and Experiment Based on the Finite Difference Method for the High-Voltage Electrostatic Field of Melting Electron Beam Gun

2014 ◽  
Vol 635-637 ◽  
pp. 31-34
Author(s):  
Hai Lang Liu ◽  
Hang Li ◽  
Hai Hua Yu ◽  
Yi Ping Huang
Keyword(s):  
Mathematical Model ◽  
Electron Beam ◽  
Electric Field ◽  
High Voltage ◽  
Electrostatic Field ◽  
Electron Beam Welding ◽  
Electrolytic Cell ◽  
Cell Experiment ◽  
Analysis Design ◽  
The Mathematical Model

Aiming at high voltage electrostatic field of melting electron beam gun system, taking 30 kv 60 kw melting electron beam gun for example, the structure of the electric field and boundary conditions was designed. And the mathematical model of the electric field was established. The method of numerical calculation was used to solve the mathematical model, and Matlab software was used to simulate the equipotential lines of the electric field. The electrolytic cell experiment was used to simulate high voltage electrostatic field distribution of the electron beam system. At the same time compared with the two different results, the reasons and the improved method were analyzed. For research and calculation high voltage electrostatic field of processing equipment such as electron beam welding, melting, etc, offers a more general analysis, design and calculation methods.

PARTICULARITIES OF USING THEE METHODS OF MATRIX PROGRAMMING IN THE MATHEMATICAL MODELS OF HIGH VOLTAGE GLOW DISCHARGE ELECTRON SOURCES

2019 ◽  
Author(s):  
Igor Melnyk
Keyword(s):  
Electron Beam ◽  
Glow Discharge ◽  
High Voltage ◽  
Electron Beam Welding ◽  
Mathematic Model ◽  
Physical Processes ◽  
Electron Sources ◽  
Distribution Of Power ◽  
Distribution Of Power Density ◽  
Discharge Gap

Possibilities and particularities of using of arithmetic-logic equations in complex models of high voltage glow discharge electron sources are considered in the article. Such electron sources are find wide application in electronic industry, device production and mechanic engineering for electron beam welding, brazing, annealing of produced items, for deposition of composed ceramics films and coatings, as well as for refining of refractory materials with using of electron-beam refusing in the soft vacuum. Main problem of designing of technological high voltage glow discharge electron sources is absence of complex physical-mathematic models. This fact is caused by complicity of physical processes, taking place in the discharge gap at conditions of low and middle vacuum, and it generally holding back the elaboration and providing in industry such advanced electron sources. Complex physic-mathematic model of high voltage glow discharge electron sources, based on apply­ ing of arithmetic-logic relations and methods of matrix programming, is proposed in the article. Main physical processes, taking place in the high voltage glow discharge, as well as mathematic means for describing these processes, and main items of elect­ ron gun, are considered. Mathematic relations for proposed model are written in the form of arithmetic-logic equations. The results of simulation of distribution of elect­ ric field in the discharge gap, distribution of power density of electron beam in the fo­ cus and guiding of electron beam in the equipotential channel, are presented. Its have been shown, that using of arithmetic-logic relations is significantly simplified realiza­ tion of proposed physic-mathematic model with using the means of matrix program­ ming. Possibilities of providing parallel calculations are also analyzed.

The Performance Optimization Design of High Frequency and High Voltage Transformer of Electronic Beam Welder

2011 ◽  
Vol 383-390 ◽  
pp. 7202-7207
Author(s):  
Sheng Wen Fan ◽  
Yun Zhao
Keyword(s):  
Electron Beam ◽  
High Voltage ◽  
Power Supply ◽  
Performance Optimization ◽  
High Frequency ◽  
Electron Beam Welding ◽  
Welding Process ◽  
Voltage Transformer ◽  
Voltage Electron ◽  
High Voltage Electron

High-frequency digital inverter power supply has the advantages of small, no noise, high efficiency, small ripp- le, and perfect protection, therefore, is gradually replacing the traditional electron beam welder which uses the 400Hz frequency generator. However, with more high frequency of the power supply, the design of the transformer used by the high-frequency high-voltage electron beam welding becomes difficult. Therefore, this paper put forward a diversified transformer mode and a voltage doubling rectifier circuit, which were used to reduce the transformer turns ratio, thus reducing the topology of the transformer distribution para- meters. Accordingly, a special high-frequency high-voltage electron beam welding tank is designed. Tests show that the set of performance indicators of the fuel tank meets the design goals to meet the actual needs of welding process.

scholarly journals Effect of high-voltage electrostatic field on cryopreservation of human epidermal melanocytes

2021 ◽  
Vol 233 ◽  
pp. 02039
Author(s):  
Xu Cai ◽  
Pengcheng Li ◽  
Benke Chen ◽  
Qian Li ◽  
Jintian Tang ◽  
...  
Keyword(s):  
Electric Field ◽  
High Voltage ◽  
Electrostatic Field ◽  
Physiological Activity ◽  
Proliferation Rate ◽  
Cell Deformation ◽  
Control Group ◽  
Freezing Damage ◽  
Static Electric Field ◽  
Supercooling Degree

The objective of this research was to evaluate the influence of high-voltage electrostatic field (HVEF) on the freezing of human epidermal melanocytes (HEM) with respect to the degree of cell deformation, survival and proliferation rate after cell resuscitation. As a result, the degree of supercooling is increased by enhancing the strength of the static electric field in the range of 15 kV/m, and the maximum supercooling degree is 7.83±0.05 °C at 15 kV/m. By contrast, the morphology of the electric field assisted freezing cell after resuscitation was significantly improved, and the best electric field strength for cryopreservation is 15 kV/m. The survival rate of human epidermal melanocytes recovered was 88.03%, which was higher than that of the control group. The proliferation rate at 24, 48 and 72 hours are 17%, 28% and 25%, respectively, which are higher than that of the control cells. These findings demonstrate that the freezing HVEF can protect the cell physiological activity, and reduce the freezing damage. Therefore, the optimal HVEF cryopreservation technology be of great significance for the research of tissue engineering in repairing wounds, infections, and promote the development of food, medicine and other fields.

Research on Direct Effects of High-Voltage Electrostatic Field on Lactoperoxidase's Activity

2013 ◽  
Vol 781-784 ◽  
pp. 372-378
Author(s):  
Xing Ke Ma ◽  
Zheng Wei Du ◽  
Min Zhu ◽  
Bo Jia Mu
Keyword(s):  
Fatty Acid ◽  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
High Voltage ◽  
Electrostatic Field ◽  
Fatty Acid Ester ◽  
Acid Ester ◽  
Protective Effects ◽  
Sucrose Fatty Acid Ester

At present, indirect effects of high-voltage electrostatic field on organisms and biological materials have been extensively studied. However, the investigations on direct interaction between the electrostatic field and enzyme are scarce. In this paper, the direct effect of high-voltage electrostatic field on the LP and the protective effects of sucrose fatty acid ester on the activity of enzyme in high-voltage electrostatic field have been experimentally investigated. The results show that, high-voltage electrostatic field has direct effects on the LP and the best condition to enhance the activity of enzyme can be obtained. When the electric-field strength is low, with the increasing of the electric-field strength, the activity of the LP will be weakened. When the electric-field strength exceeds a certain level, the activity of the LP will be enhanced with the increasing of electric-field strength. For too higher electric-field strength , the activity of the LP will be again weakened with the increasing of electric-field strength. The sucrose fatty acid ester in low concentration provides a proper hydrophobic microenvironment for enzyme, which leads to the enhancement of enzyme's activity, while sucrose fatty acid ester in high concentration leads to the weakening of enzyme's activity. Moreover, sucrose fatty acid ester in enzyme solutions has protective effects on enzyme in the electric field and can reduce the impacts of high-voltage electrostatic field on the LP.

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