| Summary: | 碩士 === 國立彰化師範大學 === 電機工程學系 === 104 === Abstract
This thesis proposes a study of efficiency analysis for LLC resonant converters. Since LLC resonant converters possess characteristics of soft-switching, high efficiency and low electromagnetic interference, are suitable to be used for power conversions. In general, efficiency is an important parameter to impact the performances of LLC resonant converters. However, only a few researches were presented for the efficiency analysis of LLC resonant converters in detail. Therefore, the efficiency of LLC resonant converters is necessary to study due to it is usually determined from the previous experience of the researchers. In this thesis, the equivalent circuit model of LLC resonant converters with non-ideal parts of the components is adopted to derive the effect upon the efficiency, and then the efficiency resulted from non-ideal components of LLC resonant converters can be discussed by this derivative result. Finally, a prototype with 380 V input and 24 V/240 W output, is implemented to estimate the feasibility of the proposed efficiency analysis for LLC resonant converters.
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