Streamer-to-leader transition in a sphere-to-plane air gap tested with switching impulses

2021 ◽  
Author(s):  
Oscar Diaz ◽  
Liliana Arevalo
Keyword(s):  
Air Gap ◽  
Switching Impulses

scholarly journals Influences of surface tips of a shield ball on the discharge characteristics of a long sphere-plane air gap under positive switching impulses

2018 ◽  
Vol 12 (7) ◽  
pp. 902-906 ◽  
Author(s):  
Jianghai Geng ◽  
Fangcheng Lv ◽  
Yujian Ding ◽  
Yingyu Zhao ◽  
Peng Li ◽  
...  
Keyword(s):  
Air Gap ◽  
Discharge Characteristics ◽  
Switching Impulses

A novel analytical calculation of magnetic field in the slotted air gap of spoke-type permanent-magnet machines using conformal mapping

2020 ◽  
pp. 1-15
Author(s):  
Jianqi Li ◽  
Yu Zhou ◽  
Jianying Li
Keyword(s):  
Magnetic Field ◽  
Conformal Mapping ◽  
Permanent Magnet ◽  
Flux Density ◽  
Analytical Method ◽  
Electromotive Force ◽  
Analytical Calculation ◽  
Air Gap ◽  
Permanent Magnet Machines ◽  
Peak Value

This paper presented a novel analytical method for calculating magnetic field in the slotted air gap of spoke-type permanent-magnet machines using conformal mapping. Firstly, flux density without slots and complex relative air-gap permeance of slotted air gap are derived from conformal transformation separately. Secondly, they are combined in order to obtain normalized flux density taking account into the slots effect. The finite element (FE) results confirmed the validity of the analytical method for predicting magnetic field and back electromotive force (BEMF) in the slotted air gap of spoke-type permanent-magnet machines. In comparison with FE result, the analytical solution yields higher peak value of cogging torque.

Effects of contact gap on nondestructive evaluation using magnetic measurement for ferromagnetic steel

2020 ◽  
Vol 64 (1-4) ◽  
pp. 969-975
Author(s):  
Hiroaki Kikuchi ◽  
Yuki Sato
Keyword(s):  
Magnetic Flux ◽  
Nondestructive Evaluation ◽  
Effective Permeability ◽  
Magnetic Circuit ◽  
Magnetic Measurement ◽  
Air Gap ◽  
Motive Force ◽  
Hysteresis Curve ◽  
Evaluation Technique ◽  
Ferromagnetic Steel

We investigated effects of contact gap on magnetic nondestructive evaluation technique using a magnetic single-yoke probe. Firstly, we evaluated hysteresis curves and impedance related to permeability of the material measured by a single-yoke probe, when an air gap length between the probe and specimens changes. The hysteresis curve gradually inclines to the axis of the magneto-motive force and magneto-motive force at which the magnetic flux is 0 decreases with increasing the gap length. The effective permeability also decreases with increasing the gap thickness. The incremental of gap thickness increases the reluctance inside the magnetic circuit composed of the yoke, specimen and gap, which results in the reduction of flux applying to specimen.

Design and Analysis of Air Gap Microstrip Slot Antenna Using Aperture Coupling

2012 ◽  
Vol 2 (4) ◽  
pp. 104-106
Author(s):  
J. P. Ganji J. P. Ganji ◽  
◽  
M.C.Sahoo M.C.Sahoo ◽  
J.M.Rathod J.M.Rathod
Keyword(s):  
Air Gap ◽  
Slot Antenna ◽  
Aperture Coupling

Development of the Partial Discharge Inception Calculation Model in a Non-uniform Air Gap Considering the Effect of Humidity

2011 ◽  
Vol 131 (12) ◽  
pp. 1017-1023 ◽  
Author(s):  
Norihito Yanagita ◽  
Tatsuro Kato ◽  
Toshiaki Rokunohe ◽  
Takeshi Iwata ◽  
Hiroki Kojima ◽  
...  
Keyword(s):  
Partial Discharge ◽  
Calculation Model ◽  
Air Gap

Design of the Air Gap Distribution of an Inductor for Automobiles with CI-Type Core

2016 ◽  
Vol 136 (11) ◽  
pp. 901-906
Author(s):  
Akinari Yamashita ◽  
Mamiko Inamori ◽  
Masayuki Morimoto
Keyword(s):  
Air Gap

Modeling of Air-gap Flux Inside of Generator for Fault Location

2012 ◽  
Vol 132 (10) ◽  
pp. 872-878
Author(s):  
Junya Matsuki ◽  
Hisao Taoka ◽  
Shoji Kawasaki ◽  
Yuki Nakajima ◽  
Masakazu Horime ◽  
...  
Keyword(s):  
Fault Location ◽  
Air Gap
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