This article proposes a noninverting bidirectional buck–boost chopper accompanied by an auxiliary converter for battery storage that is installed in a light rail vehicle. The proposed chopper is composed of two half-bridge cells called the main converter, an auxiliary converter consisting of many full-bridge converters connected in cascade, and a small-sized inductor. It is controlled such that the capacitors of the auxiliary converter store and release most of the chopper energy instead of relying solely on a bulky and heavy inductor. As a result, it is lighter and smaller than the four-switch noninverting buck–boost chopper. The operation, as well as the control of the proposed chopper, are experimentally tested using a down-scaled prototype. Furthermore, a comparison with the four-switch noninverting buck–boost chopper with respect to mass, volume, and efficiency is made to verify the efficacy of the proposed chopper.

中文翻译：

---

用于板载电池储能系统的紧凑型高功率非反相双向降压-升压斩波器


本文提出了一种同相双向降压-升压斩波器，并配有一个安装在轻轨车辆中的用于电池存储的辅助转换器。所提出的斩波器由两个半桥单元（称为主转换器）、一个由许多级联连接的全桥转换器组成的辅助转换器和一个小型电感器组成。对其进行控制，使得辅助转换器的电容器存储和释放大部分斩波器能量，而不是仅仅依赖于笨重的电感器。因此，它比四开关同相降压/升压斩波器更轻、更小。使用缩小规模的原型对所提出的斩波器的操作以及控制进行了实验测试。此外，还与四开关同相降压-升压斩波器在质量、体积和效率方面进行了比较，以验证所提出的斩波器的功效。