Series-Input Series-Rectifier Interleaved Forward Converter With a Common Transformer Reset Circuit for High-Input-Voltage Applications

A new interleaved forward (IF) converter, adopting the series-input series-rectifier (SISR) structure with a common transformer reset circuit (CTRC), is proposed in this paper. The series-input structure distributes the switch voltage stress so that it is suitable for high-input-voltage applications. Moreover, in order to simplify the total circuit, one active-clamp circuit is shared with two forward converters as a CTRC for transformer reset. In addition, the series-rectifier structure with a common output inductor guarantees a fair current balance between the primary modules, while the interleaving technique reduces the output-filter size. All these features make the proposed SISR IF converter promising for high-input-voltage applications with a high efficiency and a simple structure.