Abstract: Soft-switching pulse width modulation （PWM） combined three-level converter has two transformers and the total VA ratings of them are larger than that of a single transformer in traditional three-level converter with the same output power.In this paper,feasible magnetics integration schemes were proposed to combine the two transformers into a single core structure with savings of the core loss and size and then the efficiency increased.The derivation process of the proposed integration scheme and its effect to the converter were discussed in detail from various aspects.Experimental results from a 54 V/20 A prototype validated the theoretical analysis and demonstrated the advantages of the proposed scheme.