Measurement of Discharged Energy and Pressure of Underwater Shockwave Changing Materials of Contact Switch in High Voltage Power Supply

2013 ◽  
Vol 767 ◽  
pp. 250-255 ◽  
Author(s):  
Takumi Matsui ◽  
K. Higa ◽  
R. Matsubara ◽  
S. Hanashiro ◽  
O. Higa ◽  
...  
Keyword(s):  
High Pressure ◽  
Energy Loss ◽  
High Voltage ◽  
Power Supply ◽  
Power Supply Unit ◽  
High Voltage Power Supply ◽  
Switch Operation ◽  
Contact Switch ◽  
Reducing Energy

We have developed the high voltage power-supply unit for ingenerate high pressure due to underwater shockwave by discharging and electrical sparking consists of Cockcroft-Walton circuit. This power supply has the problem of the contact switch operation due to melting of materials of contact switch by electrical spark. We have studied the optimization of materials of contact switch by reducing energy loss and problem of operation. In this research, We changed material of contact switch metal to carbon. And verified that new contact switch made of carbon is effective to reduce energy loss and solve problem of contactor switch operation.

scholarly journals High Power Impulse Magnetron Sputtering of In2O3/Sn Cold Sprayed Composite Target

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1228
Author(s):  
Marcin Winnicki ◽  
Artur Wiatrowski ◽  
Michał Mazur
Keyword(s):  
Thin Films ◽  
Magnetron Sputtering ◽  
High Voltage ◽  
High Power ◽  
Power Supply ◽  
Indium Tin Oxide ◽  
Volume Ratio ◽  
Cold Spraying ◽  
High Voltage Power Supply ◽  
Composite Target

High Power Impulse Magnetron Sputtering (HiPIMS) was used for deposition of indium tin oxide (ITO) transparent thin films at low substrate temperature. A hybrid-type composite target was self-prepared by low-pressure cold spraying process. Prior to spraying In2O3 and oxidized Sn powders were mixed in a volume ratio of 3:1. Composite In2O3/Sn coating had a mean thickness of 900 µm. HiPIMS process was performed in various mixtures of Ar:O2: (i) 100:0 vol.%, (ii) 90:10 vol.%, (iii) 75:25 vol.%, (iv) 50:50 vol.%, and (v) 0:100 vol.%. Oxygen rich atmosphere was necessary to oxidize tin atoms. Self-design, simple high voltage power switch capable of charging the 20 µF capacitor bank from external high voltage power supply worked as a power supply for an unbalanced magnetron source. ITO thin films with thickness in the range of 30–40 nm were obtained after 300 deposition pulses of 900 V and deposition time of 900 s. The highest transmission of 88% at λ = 550 nm provided 0:100 vol. % Ar:O2 mixture, together with the lowest resistivity of 0.03 Ω·cm.

Development of the Full-Digital High Voltage Power Supply for Electronic Beam Welder

2011 ◽  
Vol 383-390 ◽  
pp. 4306-4311
Author(s):  
Sheng Wen Fan ◽  
Ze Ting Wang
Keyword(s):  
High Voltage ◽  
Power Supply ◽  
Rapid Recovery ◽  
High Voltage Power Supply ◽  
Automatic Adjustment ◽  
Design Goal ◽  
Welding Technology

A 60kV/6kW full-digital high voltage power supply for electronic beam welder (EBW) is designed. The power is composed of DSP, CPLD, IPM etc. It has realized the automatic adjustment of high voltage, over-voltage and over-current protection, and rapid recovery from high voltage self-discharge. The test proves that high voltage power supply has reached design goal and satisfied the actual requirements of welding technology.

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