• A unified method to the design of an improved high frequency sliding mode current controller for DC/DC boost converter in continuous current condition based on analogue implementation

    • Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/sadh/045/0281

    • Keywords

       

      Sliding mode control; power converters; dynamical performance; switching frequency; analogue implementation.

    • Abstract

       

      In this study, an improved high frequency sliding mode current controller is proposed for DC/DC power converters in continuous current condition using analogue-based implementation. The sliding mode control is a variable frequency method. In this strategy, the controller frequency is a function of summation of alltime delays of different parts of control circuit. If these delays increase, the switching frequency extremely decreases, steady error of the output voltage increases; and also, the converter frequency may be less than the audible frequency. In practical applications, it is extremely important that the output voltage tracks exactly its reference signal. Moreover, the switching frequency of a power converter must be more than 20 kHz in practice. A good way for enhancement of the switching frequency and dynamical performance of the sliding mode method is to use all state variables of the controlled system in the sliding manifold. This attempt has been made for the voltage regulation and input current control of a typical Boost converter in this paper. Using sliding modetheory and Filippov’s method, the stability of the suggested controller is established. Simulations and practical implementation of the proposed system show that the developed controller is successful to control the converterat high frequencies by removing the voltage error in steady region, despite using low speed and cheap electrical devices in the control circuit

    • Author Affiliations

       

      ALIREZA GOUDARZIAN1 ADEL KHOSRAVI

      1. Department of Electrical Engineering, Faculty of Engineering, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran
    • Dates

       
  • Sadhana | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2021-2022 Indian Academy of Sciences, Bengaluru.