The effects of space charge on conduction mechanism in polymer dielectric-air gap structure

2002 ◽  
Author(s):  
I.H. Park ◽  
Y.H. Kwon ◽  
S.H. Nam ◽  
S. Hwangbo ◽  
M.K. Han
Keyword(s):  
Space Charge ◽  
Conduction Mechanism ◽  
Air Gap ◽  
Polymer Dielectric ◽  
Gap Structure

Composite Diaphragm Ultrasonic Transducers Employing Air-Gap Structure

1993 ◽  
Vol 32 (Part 1, No. 5B) ◽  
pp. 2321-2324 ◽  
Author(s):  
Jun-ichi Shiokawa ◽  
Yoshiki Makishima ◽  
Ken-ya Hashimoto ◽  
Masatsune Yamaguchi
Keyword(s):  
Air Gap ◽  
Ultrasonic Transducers ◽  
Gap Structure

Enhancement of optical extraction efficiency in white LED package with quantum dot phosphors and air-gap structure

2014 ◽  
Vol 7 (5) ◽  
pp. 052101 ◽  
Author(s):  
Min-Ho Shin ◽  
Hyun-Guk Hong ◽  
Hyo-Jun Kim ◽  
Young-Joo Kim
Keyword(s):  
Quantum Dot ◽  
Extraction Efficiency ◽  
Air Gap ◽  
White Led ◽  
Optical Extraction ◽  
Gap Structure

Prototype and characteristics measurement of bearingless motor with wide air gap structure

2010 ◽  
Author(s):  
Kazunobu Oi ◽  
Daiki Matsuhashi ◽  
Masakatsu Nomura ◽  
Masatsugu Takemoto ◽  
Tadashi Fukao
Keyword(s):  
Air Gap ◽  
Bearingless Motor ◽  
Gap Structure

Non-uniform air gap modeling and electromagnetic characteristics of a new six-phase doubly salient electro-magnetic generator

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1325-1335
Author(s):  
Xiaoyu Zhou ◽  
Liwei Shi ◽  
Junhao An ◽  
Fukang Ding
Keyword(s):  
Finite Element ◽  
Linear Structure ◽  
Mutual Inductance ◽  
Air Gap ◽  
Electromagnetic Properties ◽  
Element Analysis ◽  
Doubly Salient ◽  
Electro Magnetic ◽  
Magnetic Generator ◽  
Gap Structure

The voltage harmonics of the six-phase doubly salient electro-magnetic generator (DSEG) are large, and the electromagnetic isolation is poor due to the mutual inductance of the armature winding. An optimization scheme for the stator non-uniform air gap structure is proposed. By establishing a non-uniform air gap angle function model, the analytical expression of the induced electromotive force in the non-uniform air gap structure is derived. Using finite element and mathematical model to verify that the stator tip is changed from circular arc to linear structure can increase power and reduce voltage high harmonics, improve the power quality of the generator. Based on the equivalent magnetic circuit, the influence of the winding method of the excitation winding on the mutual inductance of the armature winding is studied. When the field winding is wound interval every two stator poles, the mutual inductance is small. The electromagnetic properties of the new six-phase electric excitation double salient pole are analyzed by two-dimensional finite element analysis. The rationality of the proposed motor structure is verified by experiments.

Pt–Cu2O–Cu single-carrier space-charge-limited diodes

1977 ◽  
Vol 55 (7-8) ◽  
pp. 735-741 ◽  
Author(s):  
F. L. Weichman ◽  
K. T. Chee
Keyword(s):  
Single Crystal ◽  
Space Charge ◽  
Applied Voltage ◽  
Conduction Mechanism ◽  
Localized States ◽  
Current Response ◽  
Valence Band Edge ◽  
Single Carrier ◽  
Carrier Space ◽  
Space Charge Limited

This paper reports on the experimental results on the characteristics of the single-crystal Cu2O diodes, annealed at a pressure of 10−6 Torr at a temperature of 800 °C. In contrast to our previous report on oxidized samples which showed the characteristics of double injection diodes, these diodes exhibit the characteristics of single-carrier space-charge-limited (SCL) conduction. The conduction mechanism was confirmed by measurements on the I–V characteristics at various temperatures, the thickness vs. current relation at a given voltage, the effect of photomemory on the I–V characteristics, and the transient current response to applied voltage steps. The results also indicate that there are continuous levels of localized states in these samples in the range 0.06 eV to 0.47 eV above the valence band edge.

Effect of Space Charge on the Propagation Path of Air Gap Discharge

2011 ◽  
Vol 13 (6) ◽  
pp. 714-718
Author(s):  
Lixia Hao ◽  
Wei Wang ◽  
Huamao Zhan ◽  
Xiaohui Han ◽  
Lihong Deng
Keyword(s):  
Space Charge ◽  
Air Gap ◽  
Propagation Path

scholarly journals Conduction mechanism in (ZnO/PVC) polymer nanocomposite

2021 ◽  
Vol 2070 (1) ◽  
pp. 012007
Author(s):  
A Joy Singh
Keyword(s):  
Electrical Conductivity ◽  
Electric Field ◽  
Space Charge ◽  
Applied Electric Field ◽  
High Field ◽  
Conduction Mechanism ◽  
Polymer Nanocomposite ◽  
Zno Nanoparticle ◽  
Pure Sample ◽  
Transition Field

Abstract The electrical conductivity of ZnO nanoparticle doped PVC polymer of different concentrations and thickness has been investigated as a function if applied electric field and temperature. The LnJ versus E1/2 plot for the pure sample shows transition field but for highly doped sample, the plot shows curvature for both low and high field, i.e., there is no transition field. This nonlinearity of the plot is due to space charge built up in the sample. The value of β is calculated from the slope of LnJ versus E1/2 plot and compared with the theoretical value. The result shows the Poole-Frenkel mechanism of conduction is operative.

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