Cascade Control of Non-Ideal Boost Power Converter

Abstract

This article presents the analysis and design of a cascade controller for regulation of output voltage in a non-ideal boost power converter. Non-ideal boost power converter is a well-known nonlinear non-minimum phase system. Hence it is chosen to show the ability of the proposed control technique. The proposed technique involves sliding mode current loop and internal model-based voltage loop. Cascade controller based non-ideal boost power converter exhibits fast dynamic response, excellent tracking, and rejection of disturbances even though input voltage, load and parameters of the converter are uncertain. Validation on an experimental prototype followed by detailed analysis of results is presented.

Keywords:

• cascade control
• internal model control
• non-minimum phase system
• parasitic resistance
• sliding mode current control

Additional information

Notes on contributors

Shama Ravichandran

Shama Ravichandran is currently an assistant professor with the Department of Electrical Engineering, Ramaiah University of Applied Sciences, India. Her research interest includes nonlinear systems and control.

Sanjib Kumar Patnaik

Sanjib Kumar Patnaik is currently a professor with the Department of Electrical Engineering, College of Engineering, Guindy, Anna University, India. He has also served as the Director of All India Council for Technical Education (AICTE) for a period of three years. He has around 21 years of experience and has published around 26 research papers in national/international journals/conferences. His research interest includes nonlinear systems, robust control and sliding mode control.