This article introduces a novel topology and design methodology of a high-power charger. The proposed topology integrates a modified 12-pulse Diode Bridge Rectifier (12pDBR) with an interleaved boost converter (IBC) to meet the charging requirements and power quality standards. This results in an efficient charger with a reduced number of components and magnetic ratings compared to its counterparts. The mathematical analysis that highlights the significance of triangular shaping of the output currents of a 12pDBR and its impact on the input current harmonics is presented. Furthermore, the role of overlap angle, which is a function of system inductances, in triangular wave shaping is emphasized. A systematic methodology for the coordinated design of 12pDBR and IBC is proposed. To verify the design, MATLAB/Simulink simulations are conducted, followed by experimental validation using a 1 kW prototype. The proposed topology attains a grid current Total Harmonic Distortion (%iTHD) of 4.9%, a power factor (PF) of 0.97 lag, and a charging current ripple of 2.75% at full load condition.

中文翻译：

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一种提高大功率充电器电能质量的新型拓扑和设计方法


本文介绍了一种高功率充电器的新颖拓扑和设计方法。所提出的拓扑将改进的 12 脉冲二极管桥式整流器 (12pDBR) 与交错升压转换器 (IBC) 集成，以满足充电要求和电能质量标准。与同类充电器相比，这使得充电器的效率更高，其组件数量和磁性额定值均有所减少。数学分析强调了 12pDBR 输出电流三角整形的重要性及其对输入电流谐波的影响。此外，还强调了重叠角（系统电感的函数）在三角波整形中的作用。提出了 12pDBR 和 IBC 协调设计的系统方法。为了验证设计，进行了 MATLAB/Simulink 仿真，然后使用 1 kW 原型进行实验验证。所提出的拓扑在满负载条件下实现了 4.9% 的电网电流总谐波失真 (%iTHD)、0.97 滞后的功率因数 (PF) 和 2.75% 的充电电流纹波。