首页> 外文期刊>Very Large Scale Integration (VLSI) Systems, IEEE Transactions on >A Highly Efficient Ultralow Photovoltaic Power Harvesting System With MPPT for Internet of Things Smart Nodes
【24h】

A Highly Efficient Ultralow Photovoltaic Power Harvesting System With MPPT for Internet of Things Smart Nodes

机译:带有MPPT的物联网智能节点的高效超低光伏功率采集系统

获取原文
获取原文并翻译 | 示例

摘要

Implementing a monolithic highly efficient ultralow photovoltaic (PV) power harvesting system is pivotal for smart nodes of Internet of things (IOT) networks. This paper proposes a fully integrated harvesting system in 0.18-m CMOS technology. Utilizing a small commercial solar cell of 2.5 , the proposed system can provide 0–29 W of power, which is much higher than the commonly used passive radio-frequency identification devices in IOT application. The hill-climbing maximum power point tracking algorithm is developed in an energy-efficient manner to tune the input impedance of the system and guarantee adaptive maximum power transfer under wide illumination conditions. The detailed impedance tuning approach is implemented with a capacitor value modulation to eliminate the quiescent power consumption as well as to achieve a higher efficiency than the traditional pulse-frequency modulation scheme. A supercapacitor is utilized for buffering, energy storing, and filtering purposes, which enables more functions of the IOT smart nodes such as active sensing and system-on-chip (SOC) signal processing. The output voltage ranges between 3.0 and 3.5 V for different device loads, such as sensors, SOC, or wireless transceivers. The measured results confirm that this PV harvesting system achieves both ultralow operation capability under W and a self-sustaining efficiency of 89%.
机译:实施单片高效超低光伏(PV)功率收集系统对于物联网(IOT)网络的智能节点至关重要。本文提出了一种采用0.18米CMOS技术的完全集成的采集系统。利用2.5的小型商用太阳能电池,该系统可提供0-29 W的功率,这比IOT应用中常用的无源射频识别设备要高得多。爬坡最大功率点跟踪算法以一种节能的方式开发,可以调节系统的输入阻抗,并确保在宽照度条件下的自适应最大功率传输。详细的阻抗调整方法采用电容器值调制来实现,以消除静态功耗并实现比传统脉冲频率调制方案更高的效率。超级电容器用于缓冲,能量存储和滤波目的,从而可以实现IOT智能节点的更多功能,例如有源感应和片上系统(SOC)信号处理。对于不同的设备负载(例如传感器,SOC或无线收发器),输出电压范围在3.0至3.5 V之间。测量结果证实,该光伏收集系统既能在W下实现超低运行能力,又能实现89%的自持效率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号