Digital Robust Control for DC-DC Converter with Second-Order Differential Characteristics

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Published: Dec 19, 2008
DOI: https://doi.org/10.37936/ecti-eec.200972.171900
Keywords:
DC-DC converter Approximate 2DOF Second-order differential Digital robust control

Main Article Content

Kohji Higuchi
Dept. of Electronic Engineering, The University of Electro-Communications
Eiji Takegami
TDK-LAMBDA K.K.
Kazushi Nakano
Dept. of Electronic Engineering, The University of Electro-Communications
Tatsuyoshi Kajikawa
Dept. of Electronic Engineering, The University of Electro-Communications
Satoshi Tomioka
TDK-LAMBDA K.K.
Kosin Chamnongthai
King Mongkuts University of Technology Thonburi

Abstract

Robust DC-DC converter which can covers extensive load changes and also input voltage changes with one controller is needed. The demand to suppressing output voltage changes becomes still severer. We proposed an approximate 2DOF digital controller which realizes the startup response and dynamic load response independently. The controller makes the control bandwidth wider, and at the same time makes a variation of the output voltage small at sudden changes of loads and input voltages. In this paper, a new approximate 2DOF digital control system with additional zeros is proposed. Using additinal zeros second-order differential transfer characteristics between equivalent disturbances and an output voltage are realized. Therefore the new controller makes variations of the output voltage smalerl at sudden changes of loads and input voltages. This controller is actually implemented on a DSP and is connected to a DC-DC converter. Experimental studies demonstrate that this type of digital controller can satisfy given severe specifications.

Article Details

How to Cite
Higuchi, K., Takegami, E., Nakano, K., Kajikawa, T., Tomioka, S., & Chamnongthai, K. (2008). Digital Robust Control for DC-DC Converter with Second-Order Differential Characteristics. ECTI Transactions on Electrical Engineering, Electronics, and Communications, 7(2), 72–80. https://doi.org/10.37936/ecti-eec.200972.171900
Issue
Vol. 7 No. 2 (2009): Regular Issue
Section
Research Article

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