A New Approach to Examine the Dynamics of Switched-Mode Step-Up DC–DC Converters—A Switched State-Space Model

Abstract

Power electronic converters are important elements of many modern devices. Therefore, there is a need for a thorough analysis of their behavior and the ability to properly control them. Typically, the converter’s dynamics are investigated using the small-signal averaging method, which does not provide detailed information about the converter. In particular, it does not account for the switching ripple effect. In this paper, a novel switched state–space model of the interleaved step-up DC–DC converter is introduced. That model incorporates high-frequency information, which allows for a more in-depth dynamics analysis. The results, i.e., step and frequency responses, obtained from both theoretical models are compared to the interleaved step-up DC–DC converter model implemented in PSpice ver. 16.6 from Cadence Design Systems.

Keywords

• interleaved step-up DC–DC converter
• dynamics
• switched state–space model
• step response
• frequency response