Abstract
A simple modeling method is proposed for deriving a small signal model for DC-DC converters with current doubler rectifiers. In the proposed method, the circuit model of converters with current doublers is simplified by decomposing the converter circuit into two identical subcircuits, and the well-established averaged circuit models can be applied to each subcircuit. The proposed method is then applied to small-signal modeling of full bridge phase-shifted PWM DC-DC converters with current doubler rectifiers, and both circuit model and state- space equations are derived. Finally, frequency response of the small signal model is compared with experimental results and some insights are given into the difference between the model prediction and measured results.
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