The Effect of Axial Magnetic Field on The Breakdown Voltage of Air at Low Pressure

Owaid, Ahmed Y.

doi:10.24996/ijs.2020.61.12.11

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…This paper aims to contribute in this field. In addition, some of the studies are focused to analyze the disruptive spark breakdown [ 29 , 30 ], but non-uniform gaps can lead to corona inception and extinction voltages much lower than those required to ignite disruptive or breakdown discharges.…”

Section: Introductionmentioning

confidence: 99%

Corona Discharge Characteristics under Variable Frequency and Pressure Environments

Bas-Calopa

Riba

Moreno-Eguilaz

2021

Sensors

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More electric aircrafts (MEAs) are paving the path to all electric aircrafts (AEAs), which make a much more intensive use of electrical power than conventional aircrafts. Due to the strict weight requirements, both MEA and AEA systems require to increase the distribution voltage in order to limit the required electrical current. Under this paradigm new issues arise, in part due to the voltage rise and in part because of the harsh environments found in aircrafts systems, especially those related to low pressure and high-electric frequency operation. Increased voltage levels, high-operating frequencies, low-pressure environments and reduced distances between wires pose insulation systems at risk, so partial discharges (PDs) and electrical breakdown are more likely to occur. This paper performs an experimental analysis of the effect of low-pressure environments and high-operating frequencies on the visual corona voltage, since corona discharges occurrence is directly related to arc tracking and insulation degradation in wiring systems. To this end, a rod-to-plane electrode configuration is tested in the 20–100 kPa and 50–1000 Hz ranges, these ranges cover most aircraft applications, so that the corona extinction voltage is experimentally determined by using a low-cost high-resolution CMOS imaging sensor which is sensitive to the visible and near ultraviolet (UV) spectra. The imaging sensor locates the discharge points and the intensity of the discharge, offering simplicity and low-cost measurements with high sensitivity. Moreover, to assess the performance of such sensor, the discharges are also acquired by analyzing the leakage current using an inexpensive resistor and a fast oscilloscope. The experimental data presented in this paper can be useful in designing insulation systems for MEA and AEA applications.

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Section: Introductionmentioning

confidence: 99%

Corona Discharge Characteristics under Variable Frequency and Pressure Environments

Bas-Calopa

Riba

Moreno-Eguilaz

2021

Sensors

View full text Add to dashboard Cite

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Behavior of plasma parameters under mirror and cusp magnetic fields in DC glow discharge – a numerical study

M S,

V R,

Ramachandran

2024

Phys. Scr.

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The plasma parameters in DC glow discharge can easily be controlled by externally applied magnetic field without disturbing internal / built-in process parameters. Though several works have been carried out to study the influence of the magnetic field at different configurations on the plasma parameters, a complete understanding on the behaviour of the plasma discharge under the mirror and cusp fields could not be achieved. Further studies on the same are needed to improve the efficiency of the DC glow discharge system for existing applications and to find the new applications. In this work, a 2D axis-symmetric non-equilibrium plasma model with drift-diffusion approach is developed to study the characteristics of the plasma in DC glow discharge through various plasma parameters under mirror and cusp fields. The effects of current and position of magnetic coils on electric potential, ionization rate, electron temperature and electron number density are predicted and discussed. The distribution of electron number density at various coil currents and positions under both mirror and cusp fields are presented and the operating conditions favorable for applications in surface modification are suggested.

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The Effect of Axial Magnetic Field on The Breakdown Voltage of Air at Low Pressure

Cited by 2 publications

References 6 publications

Corona Discharge Characteristics under Variable Frequency and Pressure Environments

Corona Discharge Characteristics under Variable Frequency and Pressure Environments

Behavior of plasma parameters under mirror and cusp magnetic fields in DC glow discharge – a numerical study

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