power electronics abstract_a modified high-efficiency llc converter with two transformers for wide...
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A Modified High-Efficiency LLC Converter
with Two Transformers for Wide Input-Voltage
Range ApplicationsAbstract
This paper proposed a modified LLC converter with two transformers in series, which has four
operation configurations, covering the range of four times the minimum input voltage. To
optimize the proposed LLC converter in an attempt to achieve good efficiency, a numerical
method is developed based on the LLC converter’s steady-state equations. In order to minimize
the magnetizing current and thus minimize the conduction and core losses, an optimal objective
is proposed to find the maximum magnetizing inductance. Two conventional LLC converters are
designed using fundamental harmonic approximation and the proposed optimal design,
respectively, to make comparison with the proposed LLC converter and validate the proposed
optimal design.
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