交错两相LLC谐振变换器的移相均流控制与磁集成设计OA
Current-Sharing Control and Integrated Magnetics Design for Two-Phase Interleaved Parallel LLC Resonant Converter
针对两相交错并联电感-电感-电容(LLC)谐振变换器中输出电流不均衡的问题,提出一种基于移相控制的均流策略.首先推导移相控制方式下的电压增益解析式,从理论上验证该策略实现均流的可行性.其次,为减小磁性元件体积并提高功率密度,对变换器进行了磁集成设计.最后,搭建 1 kW、48 V 样机,与分立磁元件方案开展对比实验.实验结果表明,所提出的移相均流控制与磁集成方案可将两相电流不均流度控制在5%以内,与分立磁元件方案相比,磁性元件体积减小了7.1%,变换器效率提升了0.7%,验证了理论分析与设计方案的合理性与可行性.
To address output-current imbalance in a two-phase interleaved parallel LLC resonant converter,a phase-shift-based current-sharing strategy is proposed.Firstly,an analytical expression of the voltage gain under phase-shift modulation is derived,theoretically confirming the feasibility of achieving current sharing.Secondly,to reduce the volume of magnetic components and improve power density,an integrated magnetics design is developed for the converter.Finally,a 1 kW/48 V prototype is built and comparative experiments are conducted between discrete magnetics and integrated magnetics implementations.Experimental results demonstrate that the proposed phase-shift current-sharing control together with the integrated magnetics scheme can limit the current imbalance between the two phases to within 5%.Compared with the discrete magnetics solution,the magnetic-component volume is reduced by 7.1%and the converter efficiency is improved by 0.7%,validating the rationality and feasibility of the theoretical analysis and design.
王乐彬;张丽萍;刘煌铭
福州大学 电气工程与自动化学院,福建 福州 350108福州大学 电气工程与自动化学院,福建 福州 350108福州大学 电气工程与自动化学院,福建 福州 350108
信息技术与安全科学
交错并联LLC移相控制磁性元件磁集成
interleaved parallel LLCphase-shift controlmagnetic componentsintegrated magnetics
《电器与能效管理技术》 2026 (7)
13-20,8
福建省自然科学基金项目(2022J05196)
评论