PV Energy-Harvesting Interface Using Reconfigurable Self-Clamp CSCR Converter Achieving 3.83× High-Efficiency VCR Ratio and Open-Voltage-Sense-Free MPPT

📋 论文概要

本文提出了一种用于光伏能量采集的可重构自钳位CSCR开关电容转换器，通过自钳位技术降低电容电压应力，无需额外SC级即可实现低压电容、17.1mW/mm²功率密度和90%峰值效率。可重构方案将高效电压转换比扩展至3.83倍，仅用13个电容，同时复用转换器作为斜率传感器实现开路MPPT，无需专用电压传感器，提高了精度。

💡 主要创新点

• 提出自钳位CSCR拓扑，降低电容电压应力，使转换器可在低压电容下工作，提升功率密度和效率。
• 采用可重构自钳位方案，将高效VCR比扩展到3.83，仅用13个电容，优于现有工作。

📄 原文摘要

Abstract This work presents a PV energy harvesting interface using a self-clamp CSCR SC converter. It reduces VCF stress without additional SC stages, enabling low-voltage CFs, 17.1mW/mm2 power density and 90% peak PCE. A reconfigurable self-clamp scheme extends the high- PCE VCR ratio to 3.83 using only 13 CFs, outperforming prior works. An open-circuit MPPT scheme reuses the converter as a slope sensor, eliminating the open-voltage sensor, while reconfiguration enhances MPPT accuracy under VIN variations. Rising demand in smart cities, healthcare, and industrial automation drives the rapid growth of IoT edge sensors [1], featuring smart sensing, embedded processing, and real-time communication (Fig. 16.1.1) [2]. Self-power techniques [3], such as harvesting energy from photovoltaic (PV) panels, are essential for IoT nodes, avoiding frequent battery replacement and maintenance. Tight volume constraints on IoT nodes impose the extensive use of small

👥 作者与机构

Ziyang Zhong, Rui P. Martins, Mo Huang

University of Macau, Macau, China