International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2533

Full Length Research Paper

Performance analysis of a Ĉuk regulator applying variable switching frequency

Md. Nazmul Hasan1*, Md. Shamimul Haque Choudhury1,2, M. Shafiul Alam1,2 and Muhammad Athar Uddin1,2
1International Islamic University Chittagong (Dhaka Campus), 147, Green road, Dhaka-1205, Bangladesh. 2Bangladesh University of Engineering and Technology, Bangladesh.
Email: [email protected]

  •  Accepted: 09 September 2013
  •  Published: 23 September 2013


This paper examines the performance of Ĉuk regulator to convert three phase alternating current (ac) to direct current (dc). Firstly, three phase ac is rectified with bridge diode. The rectified dc voltage is applied to input of a Ĉuk regulator.  Three phase harmonics filter is introduced at the input of the diode rectifier to improve the shape of the input current. The main technique applied here to improve the performance of the regulator is a variable switching frequency which is applied to the gate of the IGBT; that is, at different duty cycle of the regulator, the switching frequency is different. The Total Harmonics Distortion (THD) of the input current and the efficiency of the regulator are observed. The results shown here are simulated with Pspise.


Key words: Äˆuk regulator, Total Harmonics Distortion (THD), duty cycle.