Effect of discharge products upon corona discharge and spark breakdown voltage

1963 ◽  
Vol 110 (12) ◽  
pp. 2292 ◽  
Author(s):  
F.D.A. Boylett ◽  
J.S.T. Looms
Keyword(s):  
Corona Discharge ◽  
Breakdown Voltage ◽  
Spark Breakdown

scholarly journals Measurements of Corona Discharge in Sharp –to-Plane Electrodes Configuration

2018 ◽  
Vol 11 (3) ◽  
pp. 79-84
Author(s):  
Hassan J. Mohammed
Keyword(s):  
Electric Field ◽  
Corona Discharge ◽  
Breakdown Voltage ◽  
Physical Process ◽  
Applied Voltage ◽  
Threshold Value ◽  
Precise Knowledge ◽  
Dc Current ◽  
High Degree ◽  
Spark Breakdown

A Dc positive sharp- to –plane Corona phenomena  have been studied in electronegative gases (air ,and SF6 ) for pressure up to (3.2bar and gap length from 0.1 to 0.5 cm), with high degree of non-uniformity electric field. The corona –breakdown phases can exhibit anomalous characteristics. The exact physical process of such phenomena is not yet fully understood complete. To better understand this process precise knowledge about corona and spark discharge is necessary. Hence the dependency of corona inception and spark breakdown voltage on the pressure, non-uniformity field factor  and the type of applied voltage ,also the type of materials. The steady  region of corona discharge is observed in the ( sharp- to- plane ), for applied voltage between the threshold value voltage and onset value , we observe an effect that attaching gases. A Townsend type of discharge develops in the region close to point. At voltages above the onset value , the burst pulses are replaced by a Dc current ,and in some cases 'pre-breakdown ' streamer are also observed.

scholarly journals Influence of the sign and magnitude of a surface charge on the breakdown voltage of a barrier corona discharge in Ar

2019 ◽  
Vol 1394 ◽  
pp. 012004
Author(s):  
Yu S Akishev ◽  
A A Balakirev ◽  
M A Medvedev ◽  
A V Petryakov ◽  
N I Trushkin
Keyword(s):  
Surface Charge ◽  
Corona Discharge ◽  
Breakdown Voltage

MINIMUM SPARK BREAKDOWN AND GLOW VOLTAGES

1957 ◽  
Vol 35 (5) ◽  
pp. 562-569 ◽  
Author(s):  
W. A. Gambling ◽  
F. W. Crawford
Keyword(s):  
Theoretical Analysis ◽  
Breakdown Voltage ◽  
Carbon Electrodes ◽  
Cathode Fall ◽  
The Relationship ◽  
Spark Breakdown

Measurements of the spark breakdown voltage between carbon electrodes in hydrogen, argon, nitrogen, and air are given for ranges of the product p (mm. Hg) × d (cm.) between 0.1 and 1000 mm. Hg cm. The results show that in each gas Paschen's Law is obeyed for pd > 10 mm. Hg cm. For pd < 10 mm. Hg cm. deviations from Paschen's Law were observed at the longer gap lengths. The minimum spark breakdown voltage, Vsm, occurred near pd = 1 mm. Hg cm. The normal cathode-fall voltage, Vcn, was also measured, and was found to be less than Vsm in hydrogen, argon, and air, and greater than Vsm in nitrogen. A theoretical analysis is made which predicts the relationship Vcn = 1.110 Vsm and the reasons why this condition is seldom found in practice are discussed.

scholarly journals Influence of Magnetic Field on Characteristics of Corona Discharge in Wire-Cylinder Electrodes Configuration

Plasma ◽  
2021 ◽  
Vol 4 (4) ◽  
pp. 764-779
Author(s):  
Sabah Ibrahim Wais ◽  
Pirzheen Ageed Mohammed
Keyword(s):  
Magnetic Field ◽  
Least Squares ◽  
Corona Discharge ◽  
Breakdown Voltage ◽  
Applied Magnetic Field ◽  
Empirical Formula ◽  
Negative Corona ◽  
Corona Current ◽  
Inception Voltage ◽  
The Magnetic Field

The behavior of corona discharge was investigated in wire–cylinder electrodes under the effect of a crossed magnetic field. Townsend’s formula was used commonly with a modified empirical formula to evaluate the different parameters of corona discharge in positive and negative discharge. By using a least-squares fitting, the dimensional constants A, K, and the exponent n displayed a significant dependence on the applied magnetic field. An improvement of pre-breakdown has been achieved by using a crossed magnetic field. For both polarities, while the magnetic field is present, breakdown voltage VB and corona inception voltage V0 increased, whereas the corona current decreases. In addition, the corona inception voltage was greater in positive corona in the absence of a magnetic field, while the opposite occurred regarding the crossed magnetic field. Furthermore, the breakdown streamer demonstrated significant triggering in the negative corona by applying the magnetic field.

Effect of Humidity on the Spark Breakdown Voltage

Nature ◽  
1959 ◽  
Vol 183 (4655) ◽  
pp. 174-175 ◽  
Author(s):  
K. R. ALLEN ◽  
K. PHILLIPS
Keyword(s):  
Breakdown Voltage ◽  
Spark Breakdown
Sign in / Sign up

Export Citation Format

Share Document