A comprehensive analysis for a family of two-level pulsewidth modulation plus phase-shift (PPS)-modulated-isolated-bidirectional dc–dc converters is presented in this paper. Compared with the traditional phase-shift control, the PPS control features reduced current stresses, reduced conduction losses, guaranteed zero-voltage switching (ZVS) operation, and wide conversion-ratio variation range. In this paper, all eight operation modes are revealed, and then the unified solution of the power transmission capability for each mode is proposed, applicable for any two-level PPS converters. Based on the unified solution, component stresses and ZVS operation are analyzed to assist component selection. Most importantly, the control maps for three different combinations of the two-level PPS converters are proposed, to assist converter operation and design in the low-circulating-current region. In the control map, a circuit parameter k is proposed and its upper limit is found, providing a design limit to select switching frequency, leakage inductance, turns ratio, and power level. A 29–67 V/380 V prototype—the combination of group C plus group A—rated at 100–1000 W was built. The analysis is verified by both simulation and experimental results.

中文翻译：

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一系列两电平PWM加移相调制DC-DC转换器的分析与设计

本文对一系列两级脉宽调制加相移 (PPS) 调制隔离双向 DC-DC 转换器进行了全面分析。与传统的移相控制相比，PPS 控制具有降低电流应力、降低传导损耗、保证零电压开关 (ZVS) 操作和宽转换比变化范围的特点。本文揭示了所有八种工作模式，然后提出了每种模式的电力传输能力的统一解决方案，适用于任何两电平 PPS 转换器。基于统一的解决方案，分析元件应力和ZVS操作以辅助元件选择。最重要的是，提出了两级 PPS 转换器的三种不同组合的控制图，帮助转换器在低循环电流区域运行和设计。在控制图中，提出了一个电路参数 k 并找到了它的上限，为选择开关频率、漏电感、匝数比和功率电平提供了设计限制。构建了一个 29-67 V/380 V 原型——C 组加 A 组的组合——额定功率为 100-1000 W。该分析得到了仿真和实验结果的验证。