The Ćuk Integrated Magnetics Converter With Current Ripple Cancellation: The Optimal Power Conversion Topology?

Focus:

It’s claimed that the Ćuk converter is superior to other topologies (operating at the same frequency) because it offers zero (very low) current ripple at both input and output; inductive energy storage replaced by capacitive energy storage, leading to lower cost and smaller volume; dc current in the inductor, eliminating ac copper loss; and higher efficiency. However, to the best of the author’s knowledge, no rigorous quantitative comparison was ever done to validate the narrative and quantify the advantage in power density and efficiency. In this presentation, a simple model is developed for simulation of the Ćuk converter with integrated magnetics. This model is then used to compare the Ćuk converter with an equivalent flyback converter. Some conclusions are drawn about the claimed benefits of the Ćuk converter.

What you’ll learn:

• How to model Ćuk converter with integrated magnetics
• How to evaluate Ćuk converter performance versus the flyback

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Author & Publication:

Isaac Cohen, Huntington Station, N.Y., How2Power Today, Oct 15 2025

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