scholarly journals Selected Properties of High-Frequency Electric Arc Initiators and Stabilisation Oscillators. Part 2. Devices with Compressed Electric Arc

2021 ◽  
pp. 49-60
Author(s):  
Antoni Sawicki
Keyword(s):  
Power Supply ◽  
High Frequency ◽  
Plasma Torch ◽  
Electric Arc ◽  
Arc Plasma ◽  
Technological Properties ◽  
Plasma Torches ◽  
Arc Discharges ◽  
Supply Systems

The second part of the overview article discusses general features of the design and operation of selected industrial arc plasma torches. Because of their structural and operating differences, plasma torch power supply systems with internal and partly external arc are discussed separately. Particular attention was paid to the design of electric systems used for the initiation of arc discharges. Because of the fact that the operation of plasma torches with partly external arc is often accompanied by the formation of double arc, the article also presents measures and methods enabling the prevention of the aforesaid unfavourable phenomenon. In addition, the article discusses selected technological properties of plasma torches and micro-plasma torches used for joining, cutting, surfacing and hardening.

INFLUENCE OF MODE AND GEOMETRIC CHRATERISTICS ON HIGHT-FREQUENCY INDUCTIVE PLASMA TORCH WITH REVERSE VORTEX FLOW

2019 ◽  
pp. 77-82
Author(s):  
Sergey Serbin ◽  
Аnna Mostipanenko
Keyword(s):  
High Frequency ◽  
Plasma Torch ◽  
Vortex Flow ◽  
Coal Dust ◽  
Air Plasma ◽  
Plasma Torches ◽  
Structure Of Flow ◽  
Wide Range ◽  
High Frequency Electromagnetic Field ◽  
Numerical Simulation Methods

The analysis of aerodynamic and heat structure of flow in high-frequency inductive plasma torch has been carried out. The range of plasma torch power is measured in dozens of kilowatts. The numerical simulation methods of the turbulent flow in the plasma torch affected by high frequency electromagnetic field without considering the chemical kinetics are used during the research. The data of temperature field and induced current density in the plasma torch depending on current amperage and frequency are obtained. Also, these data are obtained depending on the flow scheme in the operated on argon and air plasma torches. The inductive plasma torches can be applied to solve a wide range of tasks such as activation of coal-dust mixture with its further gasification, coating process for the stabilization of combustion processes as well as for the recycling processes at the mobile seaport recycling complexes. The calculations demonstrated convincingly the advantage of the operation of plasma torches with reverse vortex flow over plasma torches with “direct” vortex flow. Moreover the obtained data allow executing the assessment of thermal efficiency of inductive plasma jet and obtaining its optimal operational modes.

scholarly journals Plasma Peculiarities of Arc Discharge Between Carbon-Copper Electrodes

2019 ◽  
Vol 6 (2) ◽  
pp. 152-155
Author(s):  
A. Veklich ◽  
S. Fesenko ◽  
V. Boretskij
Keyword(s):  
High Speed ◽  
Arc Discharge ◽  
Electric Arc ◽  
Arc Plasma ◽  
Composite Electrodes ◽  
Plasma Properties ◽  
Mutual Correlation ◽  
Copper Electrodes ◽  
Arc Discharges ◽  
Discharge Gap

Composite materials on carbon-copper base have advanced electric and exploitation characteristics. They usually used as materials for sliding contacts for high-speed railway. Arc discharges appear during pantograph lowering process in pantograph-catenary system, so injection of contact material into discharge gap has place. Therefore, investigations of electric arc plasma between such composite electrodes can be useful for further optimization of materials. It would be very useful as well to examine the peculiarities of electric arc plasma and contacts’ working surface interaction. So, the aim of this work is spectroscopy investigations of electric arc discharge plasma between C-Cu composite electrodes. The mutual correlation of plasma properties and composition of contacts’ was found.

Applications of two electric arc plasma torches for the beneficiation of natural quartz

2019 ◽  
Vol 26 (3) ◽  
pp. 267-273 ◽  
Author(s):  
Yuri-Mikhailovich Grishin ◽  
Long Miao ◽  
Lev-Alekseevich Borisov ◽  
Nikolay-Mikhailovich Serykh ◽  
Alexey-Yurievich Kulagin
Keyword(s):  
Electric Arc ◽  
Arc Plasma ◽  
Natural Quartz ◽  
Plasma Torches
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