Abstract
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.
Highlights
High voltage refers to an output in the order of hundreds or thousands of volts (Garba, 2009)
This high voltage Direct Current (DC) power supply is built around three basic compartments which include an adjustable low voltage power supply (LVPS), a high frequency oscillator for driving a line output transformer (LOPT) - commonly known as the fly back transformer - which boost the LVPS to attain High voltage
The variable resistor provide the means by which the output voltage is regulated, and this is the main voltage that is fed the flyback transformer input, and controls the final output high voltage (Haridas et al, 2016)
Summary
High voltage refers to an output in the order of hundreds or thousands of volts (Garba, 2009). Most high-voltage supplies use a linear setup to produce an output voltage in this range. Some high voltage supplies provide analogue inputs that can be used to control the output voltage, effectively turning them into high-voltage amplifiers. There are several applications of high voltage direct current (D.C) power supply, in the field of electrical engineering and applied physics, such as electron microscopes, X-rays, electrostatic precipitators, particle accelerator in nuclear physics, dielectric testing, defibrillator in a medical lab, defense shield, stunt gun and electromagnetic pulse generator in the militia (Naidu and Kamaraju, 2013).
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