High Voltage Power Supply from Commercial Flyback Transformer

Main Article Content

Artit Yawootti
Pisit Wimonthanasit


This paper presents a method for generating a high voltage between 3 – 27 kV from a commercial flyback transformer. It’s useful in high voltage fields such as ionization or plasma applications. This high voltage generation method has consisted of an open-loop control that depends on the electric load and closed-loop control for setting a discharge current constantly. The high voltage is generated from the conventional switch circuit and use a PWM control signal from NE555 and TL494 controller. In addition, it had a gate drive circuit from the TLP250 controller. The LM741 is used for converting and amplify a discharge current to voltage signal for closed-loop control by UC3842 controller. The results show that every method can generate a high voltage and show the nonlinear characteristic between high voltage output and frequency changes. The electrical power of the commercial flyback transformer has about 20 W.

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How to Cite
Yawootti, A. . ., & Wimonthanasit, P. . . (2018). High Voltage Power Supply from Commercial Flyback Transformer. Journal of Engineering, RMUTT, 16(2), 107–118. Retrieved from https://ph01.tci-thaijo.org/index.php/jermutt/article/view/241952
Research Articles


Chatchai S, Boonme T, Danai P, and Nattapong P. Design and Development of the Corona Discharge Generator for Waste Water Treatment. Electrical Engineering Network 5th. 2013 (in Thai)

Artit Y, Panich I, and Wisut A. Design and Development of High Voltage Generator for the Electrostatic Precipitator, MFU Academic ChiangRai. 2010 (in Thai)

Artit Y, Visut A, Suttichai P, and Panich I. The Low Cost of High Voltage Pulse Electric Field Generator for Electrostatic Work Application. Academic Conference "Science Research" 3th. Phitsanulok Province. 2011 (in Thai)

HR Series. Flyback Transformer. [cited 2017 Jun 18]; Available from: http://www.donberg.ie

Weerachat K, and Woothipol T. Power Electronic. V J Printing. ISBN 974-92440-9-5. 6th. 2007 (in Thai)

Daniel M. M., DC-DC Switching Regulator Analysis. McGraw-Hill. Inc. United States of America. 1988.

Simon S. A., Power Switching Converters. Marcel Dekker. Inc. New York. 1995.

Supachai H, and Chanin B. The Comparison of Flyback Converter Circuit in CCM and DCM. Lat Krabang Academic. 20th. 2003. Vol. 1 (in Thai)

Sung-Soo H. Sang-Keun J. Young-Jin J. and Chung-Wook R., Analysis and Design of a High Voltage Flyback Converter with Resonant Elements. Journal of Power Electronics. 2010. Vol. 10. No. 2. 107-114.

Timer IC555. Timer and Pulse Wave Generator. [cited 2017 Jun 18]; Available from: https://en.wikipedia.org

TLP250. Photocoupler. TOSHIBA. [cited 2017 Jun 18]; Available from: https://toshiba.semicon-storage.com

TL494. Switch Mode Pulse Width Modulation Control Circuit. ON Semiconductor. [cited 2017 Jun 18]; Available from: http://onsemi.com

LM741. Operational Amplifier. Texas Instruments. [cited 2017 Jun 18]; Available from: www.ti.com

UC3842, Current Mode PWM Controller. Texas Instrument. [cited 2017 Jun 18]; Available from: www.ti.com