Multi-pulse current source for highly inductive load

2017 ◽  
Author(s):  
B. Guo ◽  
Y. M. Zhang ◽  
J. X. Gao
Keyword(s):  
Pulse Current ◽  
Current Source ◽  
Inductive Load

Bipolar Steep Pulse Current Source for Highly Inductive Load

2016 ◽  
Vol 31 (9) ◽  
pp. 6169-6175 ◽  
Author(s):  
Xuegui Zhu ◽  
Xiangfeng Su ◽  
Heng-Ming Tai ◽  
Zhihong Fu ◽  
Cigong Yu
Keyword(s):  
Pulse Current ◽  
Current Source ◽  
Inductive Load

MPS 11-08 Low power programmable pulse current source for wireless nerve stimulation and recording in small rodent

2016 ◽  
Vol 34 (Supplement 1) ◽  
pp. e271 ◽  
Author(s):  
Qing Wang ◽  
Philipp Schoenle ◽  
Emmanuel Flück ◽  
Noe Brun ◽  
Frederic Michoud ◽  
...  
Keyword(s):  
Low Power ◽  
Nerve Stimulation ◽  
Pulse Current ◽  
Current Source ◽  
Small Rodent

scholarly journals A Novel Augmented Railgun Using Permanent Magnets

2019 ◽  
Vol 8 (1) ◽  
pp. 99-105
Author(s):  
M. B. Heydari ◽  
M. Asgari ◽  
L. Gharib ◽  
A. Keshtkar ◽  
N. Jafari ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Lorentz Force ◽  
Permanent Magnets ◽  
Pulse Current ◽  
Current Source ◽  
The Finite Element Method ◽  
Current Densities ◽  
Constant External Magnetic Field ◽  
The Magnetic Field

A novel augmented railgun using a permanent magnet is proposed in this paper. The effects of the permanent magnet on the magnetic field and distribution of current density have been investigated. High current densities in the railguns can lead to high local temperature and erosion of the rails. Therefore, the current densities in the rails and armature should be decreased without the reduction of the Lorentz force which is required for acceleration. For this purpose, augmentation of the magnetic field can be used as an effective method. The Finite Element Method (FEM) simulations have been applied in this article to analyze the performance of the railgun in the presence of the magnets. Two augmented railgun structures have been introduced to produce a constant external magnetic field. For both structures, augmented railgun characteristics are studied in comparison to the railgun without the augmentation. The results show that augmentation with permanent magnet increases railgun efficiency, especially in low current railguns. For pulse current source I=30kA, Lorentz force of the augmented railgun with four magnets is 2.02 times greater than the conventional railgun.

scholarly journals Phase Controlled Valve and Capacitor Pulse Current Source for Electrical Technology

2020 ◽  
pp. 32-34
Author(s):  
L.P. Shichkov ◽  
◽  
O.P. Mokhovа ◽  
A.N. Strukov ◽  
C.M. Metlitski ◽  
...  
Keyword(s):  
Pulse Current ◽  
Current Source

Investigation of Microstructure and Properties of Ni/CNT Nanocrystalline Coating Deposited by Brush Plating

2007 ◽  
Author(s):  
Jun Tan ◽  
Tiantian Yu ◽  
Binshi Xu ◽  
Bin Zhu
Keyword(s):  
Carbon Nanotubes ◽  
Grain Size ◽  
Wear Resistance ◽  
Direct Current ◽  
Pulse Width ◽  
Pulse Current ◽  
Heating Temperature ◽  
Current Source ◽  
Average Grain Size ◽  
Brush Plating

Nickle-carbon nanotube (Ni/CNT) nanocrystalline coatings with different parameter were prepared by brush plating. The carbon nanotubes were added into common nickel solution for brush plating and ball milling was used to disperse the carbon nanotubes in the solusion. The concentration of carbon nanotubes in the solution was 3 g/l. The SEM and XRD were applied to investigate the grain size, microstructure and morphology of the coatings. The hardness and the wear mass loss of the coatings were examined on micro hardness tester and ball on disk tribotester. The results show that under a direct-current source, the grain size of the Ni/CNT coating was about 20 nm. Under a pulse-current source, the grain size of the Ni/CNT coatings decreased and the coatings gained smoother surface when the pulse-width became shorter. The grain size of the Ni/CNT coating increased with the heating temperature increasing and the average grain size of the coating heated at 500 degrees centigrade was over 50 nm. The microhardness of the Ni/CNT coating under a pulse-current source was higher than that of the coating under a direct-current source. Under a pulse-current source, the microhardness of the Ni/CNT coating increased when the pulse-width became shorter. The microhardness of the Ni/CNT coating changed slightly below 300 degrees centigrade, while decreased obviously after heated up to 400 degrees centigrade. The wear resistance of the Ni/CNT coating under a pulse-current was higher than that of the coating under a direct-current. Under a pulse-current, the wear resistance of the Ni/CNT coating increased when the pulse-width became shorter.

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