A New Design of Robust Digital Controller for DC-DC Converters
| Authors: | Higuchi Kohji, The University of Electro-Communications, Japan
Nakano Kazushi, The University of Electro-Communications, Japan
Kajikawa Tatsuyoshi, The University of Electro-Communications, Japan
Takegami Eiji, DENSEI-LAMBDA K.K., Japan
Tomioka Satoshi, DENSEI-LAMBDA K.K., Japan
Watanabe Kazushi, DENSEI-LAMBDA K.K., Japan |
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| Topic: | 6.3 Power Plants and Power Systems |
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| Session: | Control of Power Converters |
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| Keywords: | DC-DC converter, Digital Control, Approximate 2-degree-of-freedom system, Robust control |
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Abstract
Robust DC-DC converters which can cover extensive load changes and also input voltage changes are needed. In this paper, we propose a new method for designing good approximate 2-degree-of freedom (2DOF) digital controller which makes the control bandwidth wider, and at the same time makes a variation of the output voltage very small at sudden changes of resistive load. The proposed approximate 2DOF digital 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 specifications.
