Graphical user interface based controller design for switching converters

Abstract

The graphical user interface (GUI) described in this paper provides a complete procedure for constructing both the analog and digital controllers for switching converters for superior performance. Although the GUI is designed to control switching converters having second-order transfer function, it can equally be applied to all second-order systems. The purpose of this GUI is to facilitate SMPS designers, including most control engineers, who lack a sound background in control system theory. Without having deep insight into the control theory, one can easily design a controller for a switching converter in order to achieve dynamic performance. The GUI comes with the advantage of investigating the effects of sampling time and mapping techniques while designing a digital controller. The analog controller is designed on the basis of Bode plot of the frequency response, which is then converted into the digital controller using suitable sampling period. A design example is provided to validate the competency of this GUI.