Modeling and Control of a Cascaded Boost Converter with a Single Switch

In this paper, a controller design methodology is given for a cascaded boost converter with a single switch using current-mode control. Nonlinear and linear models are presented, the later exhibits fourth-order characteristic dynamics with right-half side zeros. The proposed control scheme is based...

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Bibliographic Details
Main Authors: Morales-Saldana, J.A., Galarza-Quirino, R., Leyva-Ramos, J., Carbajal-Gutierrez, E.E., Ortiz-Lopez, M.G.
Format: Conference Proceeding
Language:English
Subjects:
Batteries
DC-DC power converters
Design methodology
Fuel cells
Global Positioning System
Low voltage
Open loop systems
Switches
Switching converters
Topology
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Summary:In this paper, a controller design methodology is given for a cascaded boost converter with a single switch using current-mode control. Nonlinear and linear models are presented, the later exhibits fourth-order characteristic dynamics with right-half side zeros. The proposed control scheme is based on sensing the current of the switch and using it for feedback purposes. When the current loop is introduced, the fourth-order dynamics of the converter is changed to a dominant first-order, which simplifies substantially the controller design of the outer loop. For this loop, a conventional controller is designed. The design-oriented analytic results allow the designer to easily pinpoint the control circuit parameters that optimize the converter's performance. At the end, experimental results are given for a 23 W current-mode regulator
ISSN:1553-572X
DOI:10.1109/IECON.2006.347554