Analyzing Stability Issues in a Cascaded Converter System Comprised of Two Voltage-Mode Controlled DC-DC Converters


This work analyzes the stability of a cascaded converter system comprised of two dc-dc converters operating with voltage-mode controllers. First it develops a single converter small-signal model and derives the mathematical representation of the converter from it. Next, it derives the required closed-loop transfer functions and input and output impedances from the model. Then, it develops the cascaded converter model based on the derived closed-loop impedances and the single converter model. Finally, it derives the cascaded converter system transfer function which addresses the stability of the system and analyzes the stability based on this transfer function.

Meeting Name

26th Annual IEEE Applied Power Electronics Conference and Exposition (2011: Mar. 6-11, Fort Worth, TX)


Electrical and Computer Engineering

Keywords and Phrases

Cascaded Converters; Closed Loop Transfer Function; Closed-Loop; Converter Model; Input And Output Impedance; Mathematical Representations; Small Signal Model; Stability Issues; Voltage Mode; DC Power Transmission; Heterojunction Bipolar Transistors; Power Electronics; System Stability; Transfer Functions; DC-DC Converters; Converters; Mathematical Model; Transfer Functions; Voltage Control; Impedance; Stability Analysis; Integrated Circuit Modeling; Closed Loop Systems; DC-DC Power Convertors; Stability

International Standard Book Number (ISBN)

978-1424480845; 978-1424480852

International Standard Serial Number (ISSN)


Document Type

Article - Conference proceedings

Document Version


File Type





© 2011 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Mar 2011