Design of a 1.2 kW Interleaved Synchronous Buck Converter for Retrofit Applications in Aviation Systems

Sener E., Yazar I., Ertasgin G., Yamik H.

SAE INTERNATIONAL JOURNAL OF AEROSPACE, vol.13, no.2, pp.197-211, 2020 (ESCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 13 Issue: 2
  • Publication Date: 2020
  • Doi Number: 10.4271/01-13-02-0015
  • Journal Indexes: Emerging Sources Citation Index (ESCI), Scopus, Academic Search Premier, Compendex
  • Page Numbers: pp.197-211
  • Eskisehir Osmangazi University Affiliated: Yes


Presently, 270 V direct current (DC) systems replace older 28 V DC voltage systems in both the civil and military aviation industry due to the requirement for more electrical power needs on board. Therefore, the existing avionics require retrofitting. The conversion from 270 V to 28 V appears to be quite promising for both old and new systems. This study aims to design an interleaved synchronous modular buck converter topology as a candidate for these requirements. Calculations for the converter design are conducted considering aviation standards. Switching with pulse-width modulation (PWM) is used to control the power converter. A double-loop feedback control system based on voltage and current feedback is designed. Therefore, the buck converter circuit with 1145 W power output is proposed, which supplies a 28 V and 41 A DC output from a 270 V DC input. The concept is verified using simulations and hardware-in-the-loop (HIL) experimental results.