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Dynamic Characteristics of DC-DC Converters Using Digital Filters  

Kurokawa, Fujio (Department of Electrical and Electronic Engineering, Nagasaki University)
Okamatsu, Masashi (Graduate School of Science and Technology, Nagasaki University)
Ishibashi, Taku (Department of Electrical and Electronic Engineering, Nagasaki University)
Nishida, Yasuyuki (Department of Electrical, Electronics and Computer Engineering, Chiba Institute of Technology)
Publication Information
Journal of Power Electronics / v.9, no.3, 2009 , pp. 430-437 More about this Journal
Abstract
This paper presents the dynamic characteristics of buck and buck-boost dc-dc converters with digital filters. At first, the PID, the minimum phase FIR filter and the IIR filter controls are discussed in the buck dc-dc converter. Comparisons of the dynamic characteristics between the buck and buck-boost converters are then discussed. As a result, it is clarified that the superior dynamic characteristics are realized in the IIR filter method. In the buck converter, the undershoot is less than 2% and the transient time is less than 0.4ms. On the other hand, in the buck-boost converter, the undershoot is about 3%. However, the transient time is approximately over 4ms because the output capacitance is too large to suppress the output voltage ripple in this type of converter.
Keywords
Buck converter; Buck-boost converter; Digital control; FIR filter; IIR filter; Dynamic characteristics;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
Times Cited By Web Of Science : 2  (Related Records In Web of Science)
Times Cited By SCOPUS : 8
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