Indirect Sliding Mode Control for DC-DC SEPIC Converters


Komurcugil H., Biricik S., Güler N.

IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS, vol.16, no.6, pp.4099-4108, 2020 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 16 Issue: 6
  • Publication Date: 2020
  • Doi Number: 10.1109/tii.2019.2960067
  • Title of Journal : IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
  • Page Numbers: pp.4099-4108
  • Keywords: Proportional-integral (PI) control, single-ended primary-inductor converter (SEPIC), sliding mode control (SMC), DESIGN, MPPT, STATE

Abstract

This article presents an indirect sliding mode control (SMC) for single-ended primary-inductor converters (SEPIC). Unlike the conventional SMC methods, the proposed SMC method employs a sliding surface function based on the input current error only. The use of such sliding surface function not only simplifies the implementation but also reduces the cost of implementation. It is shown that the output voltage control can be achieved indirectly. The input current reference is generated by a proportional-integral (PI) regulator. The existence condition and the region of the closed-loop system are determined for all possibilities of the PI gains. The performance of the proposed SMC method is investigated on a laboratory prototype converter, operated in buck and boost modes, in terms of the voltage regulation ability under abrupt changes in the input voltage and load resistance. Simulation and experimental results are presented and discussed.