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> Archives > Current Issues |
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JPE, Vol. 19, No. 1, January 2019 |
Analysis and Modeling of AC-AC Switched Capacitor Converters
Hui Cai, Liting Bao, Qian Guo, Ying Wang, and Weimin Chen
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Area |
Low Power Converters |
Abstract |
A new modeling method for AC-AC switched capacitor converters (SCCs) is introduced in this study. The proposed analytical
method aims to accurately describe the input-output characteristics of AC-AC SCCs and establish a mathematical model for
static voltage conversion ratio and equivalent resistance, which are key performance metrics for SCCs. A quantitative analysis of
converter regulation capability is addressed on the basis of the modeling method. In this analysis, the effects of the control
parameters and individual components on SCCs are illustrated extensively. Component stresses, such as the peak value and
transient variation of the voltage/current of the converter, are also presented. The effectiveness of the proposed method is verified
by comparing it with the existing modeling method and applying it to an AC-AC SCC with a conversion ratio of three. Two 1
kW prototypes are built in a laboratory, and their experimental results exhibit good agreement with the theoretical analysis. |
Keyword |
AC-AC converters,Modeling,Switched capacitor,Transient analysis |
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