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A Disturbance Observer-Based Output Feedback Controller for a DC/DC Boost Converter with Load Variation  

Jeong, Goo-Jong (명지대학교 전기공학과)
Kim, In-Hyuk (명지대학교 전기공학과)
Son, Young-Ik (명지대학교 전기공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.58, no.7, 2009 , pp. 1405-1410 More about this Journal
Abstract
Output voltage of a DC/DC power converter system is likely to be distorted if variable loads exist in the output terminal. This paper presents a new disturbance observer(DOB) approach to maintain a robust regulation of the output voltage of a boost type DC/DC converter. Unlike the buck-type converter case, the regulation problem of the boost converter is very complicated by the fact that, with respect to the output voltage to be regulated, the system is non-minimum phase. Owing to the non-minimum phase property the classical DOB approach has not been applied to the boost converter. Motivated by a recent result on the application of DOB to non-mimimum phase system, an output feedback control law is proposed by using a parallel feedforward compensator. Simulation results using the Simulink SimPowerSystems prove the performance of the proposed controller against load variation.
Keywords
Boost Converter; Disturbance Observer; Non-minimum Phase; Output Feedback Control;
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Times Cited By KSCI : 4  (Citation Analysis)
Times Cited By SCOPUS : 0
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