An Isolated Weinberg Converter Based on EIE‐Type Planar Decoupled Magnetic Integration

ABSTRACT The isolated Weinberg converter has been widely employed in spacecraft power systems. However, multiple discrete magnetic components increase the converter volume and weight, limiting further improvements in power density. To address this issue, this paper proposes an EIE‐type planar decoupled integrated‐magnetics structure that integrates these magnetic components without altering the original converter topology or basic operating principle. The windings of the coupled inductor and push‐pull transformer are arranged on the center limbs of the upper and lower ER cores, respectively, while the intermediate I‐core forms a shared low‐reluctance magnetic path. Partial flux cancellation reduces the flux density in the common magnetic path and mitigates the risk of core saturation. An equivalent magnetic‐circuit model is established for different operating modes to analyze the underlying magnetic‐decoupling mechanism, and the magnetic‐flux distribution is verified through finite‐element analysis. Finally, a 1.2‐kW experimental prototype is developed and achieves a peak efficiency of 94.33%, validating the effectiveness of the proposed integrated‐magnetics structure.