团队论文“ Optimized Magnetic Shunt Integrated Inductor-Transformer Structure with Adjustable Turns Ratio for Wide Gain Range LLC Resonant Converter”被IEEE Journal of Emerging and Selected Topics in Power Electronics期刊录用。其中学生杨东醒是该论文的第一作者。论文摘要如下：

    Abstract: To increase the efficiency and power density of LLC resonant converter, the leakage inductance of the transformer is used as the resonant inductor. To meet the demand for a larger resonant inductor in wide gain range converter, magnetic shunt is regarded as an effective solution. However, existing works lack a quantitative analysis of the effective turns ratio variation in magnetic shunt integrated structures. Meanwhile, non-interleaved windings suffer from increased winding loss in designs for non-integer turns ratios. This paper quantitatively analyzes the leakage inductance generation locations and reasons of effective turns ratio variation in the magnetic shunt integrated structure, from the perspectives of both the mutual inductance model of the magnetic circuit and the physical leakage flux distribution. Based on the analysis, this paper proposed a magnetic shunt integrated transformer structure with adjustable turns ratio. By exploiting their distinct physical origins, the magnetic reluctances of the two core air gaps are independently controlled. The proposed structure enables decoupled control of the leakage inductance, magnetizing inductance, and effective turns ratio, effectively decreases turns number in non-integer turns ratio designs. This paper then proposes an optimized magnetic shunt structure, wherein a ferrite segment and an air gap are connected in series to form the shunt path. This configuration enables the realization of an arbitrary equivalent permeability for the magnetic shunt, effectively preventing saturation and significantly enhancing the practical feasibility of the magnetic shunt integrated structure. A 1.2 MHz, 40–60 V input and 12 V 80 W output LLC resonant converter is built to verify the proposed theories. The converter achieved precise control of the effective turns ratio, delivering a peak efficiency of 95.1% and a full-load efficiency of 94.85%.