Fractional-order controllers for switching DC/DC converters using the K-factor method: Analysis and circuit realization


Cengelci E., GARİP M., Elwakil A. S.

INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS, vol.50, no.2, pp.588-613, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 50 Issue: 2
  • Publication Date: 2022
  • Doi Number: 10.1002/cta.3168
  • Journal Name: INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Communication Abstracts, Compendex, INSPEC, Metadex, zbMATH, Civil Engineering Abstracts
  • Page Numbers: pp.588-613
  • Keywords: fractional-order circuits, frequency domain analysis, K-factor stability, switching converters, SYSTEMS, TIME
  • Yıldız Technical University Affiliated: Yes

Abstract

Switching DC/DC converters are closed loop systems requiring controllers to stabilize and optimize their performance. A practical method for designing these controllers through pole/zero placement adjustment is the K-factor method. This method can easily be implemented using RC op-amp circuits given a target crossover frequency and phase margin. Here, we extend this method to the fractional-order domain and present detailed analytical formulae to calculate all component values in two types of op-amp-based compensators. Mathematical analysis, circuit simulation, and experimental results all correlate very well.