scholarly journals Selected Properties of High-Frequency Electric Arc Initiators and Stabilisation Oscillators. Part 1. Devices with Free Electric Arc

2021 ◽  
Author(s):  
Antoni Sawicki
Keyword(s):  
Physical Properties ◽  
High Voltage ◽  
High Frequency ◽  
Electric Arc ◽  
Spark Discharges ◽  
Spark Gap ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Dynamic States

The article presents selected physical properties of electric arc used in welding engineering as well as discusses differences in requirements concerning ionisers used to initiate and re-initiate electric arc. In addition, the article compares properties of ioniser systems used to stabilise electric arc burning as well as discusses spark gap and semiconductor systems generating high-frequency and high-voltage impulses used to generate spark discharges. The article also discusses the effect of ioniser operation after the modification of static current-voltage characteristics, enabling the modelling of dynamic states of electric arc.

scholarly journals The Effect of the Selection of a Function Approximating Static Characteristics on the Modelling of Electric Arc

2020 ◽  
pp. 43-50
Author(s):  
Antoni Sawicki
Keyword(s):  
Research Work ◽  
Hybrid Models ◽  
Electric Arc ◽  
Static Characteristics ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Effective Use ◽  
Selection Of ◽  
Dynamic States

The article presents selected tapering functions useful when creating hybrid models and functions approximating static current-voltage characteristics of arc. The research work involved the formation and verification of families of static current-voltage characteristics with defined values of voltage ignition and the extension of approximating possibilities of the formulas through the use of tapering functions. The effective use of various functions approximating static characteristics in the modelling of dynamic states in the circuit with electric arc was verified through simulation.

Isothermal current–voltage characteristics of high-voltage 4H-SiC junction barrier Schottky rectifiers

2016 ◽  
Vol 50 (5) ◽  
pp. 656-661
Author(s):  
M. E. Levinshtein ◽  
P. A. Ivanov ◽  
Q. J. Zhang ◽  
J. W. Palmour
Keyword(s):  
High Voltage ◽  
Schottky Rectifiers ◽  
Current Voltage ◽  
Current Voltage Characteristics

scholarly journals Efficiency and Droop Improvement in GaN-Based High-Voltage Flip Chip LEDs

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Yen-Chih Chiang ◽  
Bing-Cheng Lin ◽  
Kuo-Ju Chen ◽  
Sheng-Huan Chiu ◽  
Chien-Chung Lin ◽  
...  
Keyword(s):  
High Voltage ◽  
Flip Chip ◽  
Light Emitting Diode ◽  
Bragg Reflector ◽  
Light Extraction ◽  
Efficiency Enhancement ◽  
Distributed Bragg Reflector ◽  
Light Emitting ◽  
Current Voltage ◽  
Current Voltage Characteristics

The GaN-based high-voltage flip chip light-emitting diode (HVFC-LED) is designed and developed for the purpose of efficiency enhancement. In our design, the distributed Bragg reflector (DBR) is deposited at the bonded substrate to increase the light extraction. After the flip chip process, the general current-voltage characteristics between the flip chip sample and the traditional sample are essentially the same. With the help of great thermal conductive silicon substrate and the bottom DBR, the HVFC-LED is able to enhance the power by 37.1% when compared to the traditional high-voltage LEDs. The wall-plug efficiencies of the HVFC-LED also show good droop reduction as high as 9.9% compared to the traditional devices.

Generalization of the current-voltage characteristics of electric arc heaters

1967 ◽  
Vol 13 (3) ◽  
pp. 170-171 ◽  
Author(s):  
A. I. Zhidovich ◽  
S. K. Kravchenko ◽  
O. I. Yas'ko
Keyword(s):  
Electric Arc ◽  
Current Voltage ◽  
Current Voltage Characteristics

scholarly journals The Mayr-Pentegov Model of Electric Arc Involving the Use of the Exponential Function and Enabling the Approximation of Static Characteristics

2021 ◽  
pp. 51-59
Author(s):  
Antoni Sawicki
Keyword(s):  
Exponential Function ◽  
Electric Arc ◽  
Static Characteristics ◽  
Exponential Component ◽  
Integral Forms ◽  
Current Voltage ◽  
Current Voltage Characteristics

The article presents the justified use of functions containing the exponential component for the approximation of the static current-voltage characteristics of electric arc. The Author proposed a new function approximating the above-named characteristics which were next used in the mathematical Mayr-Pentegov model, expressed in two, i.e. differential and integral, forms. The two forms constituted the basis enabling the development of macromodels using controlled voltage and current sources. The article also presents families of dynamic current-voltage characteristics obtained through the simulation of processes in a circuit containing macromodels of arc powered by the source of current characterised by sinusoidal and trapezoidal waveforms and various frequency. The article demonstrates the usability of the proposed variants of the Mayr-Pentegov model.

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