Modeling, analysis, and design criteria of actively clamped double-ended converters

The characteristics of actively clamped double-ended (ACDE) converters are studied. It is found that they possess interesting features such as near-zero output current ripple and require no magnetic reset winding. A low-frequency behavior model of the ACDE converter is derived, from which important relationships among output voltage V₀ , input voltage V_i, and duty cycle D are obtained. When compared with other forward-derived converters, an ACDE converter has extra poles and zeros in the small-signal control-to-output and input-to-output transfer functions. The design criteria and experimental results are also reported