Sarun Soman
Manipal Institute of Technology

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Development of Digital Controller for DC-DC Buck Converter Sarun Soman; Sangeetha T.S.
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 6, No 4: December 2015
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (424.051 KB) | DOI: 10.11591/ijpeds.v6.i4.pp788-796

Abstract

This paper presents a design & implementation of 3P3Z (3-pole 3-zero) digital controller based on DSC (Digital Signal Controller) for low voltage synchronous Buck Converter. The proposed control involves one voltage control loop. Analog Type-3 controller is designed for Buck Converter using standard frequency response techniques.Type-3 analog controller transforms to 3P3Z controller in discrete domain.Matlab/Simulink model of the Buck Converter with digital controller is developed. Simualtion results for steady state response and load transient response is tested using the model.
DC transformer modeling and control of DC-DC buck converter Sarun Soman; Nishtha Shelly; Ciji Pearl Kurian; Sudheer Kumar TS
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 10, No 1: March 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1656.724 KB) | DOI: 10.11591/ijpeds.v10.i1.pp319-329

Abstract

Switching Power Converters convert one form of power to another with high ef-ciency and accurate control.One of the most widely used DC-DC Converter is Buck Converter. Control is invariably required to maintain the output voltage/current in spite of variations in source/load. In order to design the controller and gain insight about the system a dynamic model needs to be developed. Modeling techniques widely used are state space averaging and PWM switch model. In this paper DC transformer modeling technique is used to develop the averaged model of the converter. One of the advantages of this model is that it can be implemented in Spice simulator using basic circuit elements. The same model can be used for time domain as well as frequency domain analysis. Analog type-II compensator is designed to compensate the system. Simulation and experimental results for start-up transient and load transient are shown to validate the model.