scholarly journals DESIGN AND CONSTRUCTION OF A LOW-COST 30KV VARIABLE DC POWER SUPPLY UNIT

2020 ◽  
pp. 3666-3673
Author(s):  
Bolarinwa H.S. ◽  
Fajingbesi F.E. ◽  
Yusuf A. ◽  
Animasahun L. O. ◽  
Babatunde Y. O.
Keyword(s):  
High Voltage ◽  
Power Supply ◽  
Low Voltage ◽  
High Reliability ◽  
Low Cost ◽  
Scientific Data ◽  
High Voltage Power Supply ◽  
Technology Application ◽  
High Voltage Direct Current ◽  
Current Voltage

A high voltage power supply is a key component in the advancement of science and technology. Application of high voltage power supply requires careful attention to critical variables such as voltage ripple, long and shortterm stability, repeatability and accuracy. These are important factors in the consideration of reliable scientific data. This paper presents the design of a low-cost high voltage power supply from the off-the-shelf electronics components to meet the high-end requirement of high voltage power supply. A 30kV, 63.8mA maximum power supply was constructed at the Fountain University electronics workshop. This high voltage directs current (HVDC) power supply was built around three basic compartments that include an adjustable low voltage power supply (LVPS), a high frequency oscillator, and a line output transformer (LOPT) using flyback transformer, NE555timer, BU508D BJT, and other off-the-shelf components. The current-voltage relationship at the output of the constructed High Voltage Direct Current was found to be linear. This power source will serve any high DC voltage applications such as electrospinning. The constructed 30kV power supply has been tested in the electrospinning laboratory of the Center for Energy Research and Development (CERD) Obafemi Awolowo University (OAU) Ile-Ife. The unit successfully electrospun Zinc-Titaninm polymeric solution into fibers at about 8 kV. The importance of this fabricated device is its high reliability despite its low cost and capability to produce different magnitude of high voltage DC.

Design of a High Voltage Switching Power Supply with Soft Switching Technology

2014 ◽  
Vol 536-537 ◽  
pp. 1493-1496
Author(s):  
Zhu Lei Shao
Keyword(s):  
High Voltage ◽  
Power Supply ◽  
Soft Switching ◽  
Switching Power Supply ◽  
High Voltage Power Supply ◽  
Soft Switch ◽  
Switching Power ◽  
Switch Power Supply ◽  
Application Requirements ◽  
Voltage Switching

Aiming at the application requirements of miniaturization and energy saving in the field of high voltage power supply, a high voltage switching power supply with soft switching technology was designed. The soft switch technology which makes the loss of switch power supply decrease obviously,and the dual voltage rectifier technology can effectively reduce the volume of switching power supply. Circuit parameters of switching power supply are optimized in order to further improve the efficiency of power supply. From the experiment results, the high voltage switching power supply meets the design requirements, and suitable for the strict requirements of environment on the volume and efficiency.

Development of Power Supply for Inverter Electron Beam Welder Based on Zero-Voltage Switching Technology

2013 ◽  
Vol 389 ◽  
pp. 467-470 ◽  
Author(s):  
Zhi Jie Liu ◽  
Shou Qi Wei ◽  
Si Si Zhu ◽  
Zhen Yuan Su ◽  
Ming Li ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Voltage ◽  
Power Supply ◽  
Integrated Circuit ◽  
Energy Conversion Efficiency ◽  
High Voltage Power Supply ◽  
Zero Voltage Switching ◽  
Voltage Electron ◽  
Zero Voltage ◽  
Voltage Switching

In this paper, introduce the power supply for full-bridge inverter high frequency high voltage electron beam welder, applying PWM-Buck integrated circuit and zero-voltage switching technology and the control system. Getting continuously adjustable, stable over current and over voltage protection, and the regulator the accuracy requirements of output voltage from high voltage power supply, and improve the energy conversion efficiency of the system.

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.

The Feasible Analysis of Transformer Fast Reenergizing with Neutral Point Ungrounded

2013 ◽  
Vol 732-733 ◽  
pp. 958-964
Author(s):  
Yao Zhao ◽  
Yu De Yang ◽  
Yan Hong Pan ◽  
Le Qi
Keyword(s):  
High Voltage ◽  
Power Supply ◽  
Low Voltage ◽  
Second Harmonic ◽  
Neutral Point ◽  
Inrush Current ◽  
Differential Protection ◽  
Time Saving ◽  
Magnetizing Inrush Current ◽  
Transformer Differential Protection

The feasibility of transformer fast reenergizing with neutral point ungrounded after the external fault being removed is analyzed in this paper. By calculating overvoltage and discriminating magnetizing inrush current, it analyzes four ways to restore power of transformer and chooses the optimal strategy which is safe and time-saving. The result shows that in the case of transformer neutral point ungrounded, closing the low-voltage circuit side breaker before the high-voltage, which can effectively limit over-voltage in a safe range. The second harmonic characteristic of magnetizing waveform may disappear, while the intermittent angle characteristics are still significant. With the help of the intermittent angle principle, transformer differential protection may not misuse. The average time for each customer interruption is reduced from 40 minutes to 10 minutes and saves an hour for engineer on the way back and forth. It will greatly improve power supply reliability.

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