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This paper proposes a new recovery circuit for the capacitive load. Connecting the one side of windings to the load together, the resonant current is shared in both windings, hence the conduction loss is reduced. Simple circuit structure with transformer achieves the reduced the number of devices. Furthermore, the current-balance transformer enables ZVS operation of the switching device. To confirm...
In this paper, a small signal analysis for tapped inductor converter under the critical conduction mode control (CRM) is presented. Critical conduction mode control is one of the hysteretic current mode controls in variable switching frequency operation. In first, a mathematically-described variable-frequency control modeling method for tapped inductor converters is introduced through extending the...
In this paper, based on the small signal analysis of switching power converters under a hysteretic current mode control, a unified PWM switch model is derived. The model is easy to handle because all manipulations are performed on a circuit diagram which includes simply-described function blocks indicating the physically intuitive relationships among the model parameters. This paper presents two kinds...
In this paper, a new zero-voltage switching (ZVS) buck converter with a tapped-inductor is proposed. This converter improves the conventional tapped inductor critical conduction mode (CRM) buck converters that have the ZVS operation range determined by the tapped-inductor turn ratios. It includes another soft switching range extension method, the current injection (CI) method, which gives an additional...
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