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Dual-Source Self-Start High-Efficiency Microscale Smart Energy Harvesting System for IoT

机译:物联网双源自启动高效微型智能能源采集系统

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This paper presents a low-power batteryless energy harvesting system for Internet of Things (IoT) applications. A dual-mode dc-dc converter is used to harvest the energy of a microscale photovoltaic (PV) transducer and provides energy, in the boost mode, to a super capacitor for storage. In the buck mode, the dc-dc converter provides energy to the load on demand. A piezoelectric transducer is used as a secondary input source to guarantee system self startup. The proposed system includes a smart control to adaptively adjust the number of sensors at the load, leading to better usage of the available energy at any given time. The implementation also includes a programmable switch sizing to optimize the overall system's efficiency for different load conditions. A maximum power point tracking is used to extract the maximum power of the PV transducer under various illumination conditions. The system has been implemented in a CMOS 130-nm technology and tested in various modes of operation. Self startup has been verified, and a peak efficiency of 90.5% has been measured.
机译:本文提出了一种用于物联网(IoT)应用的低功耗无电池能量收集系统。双模式dc-dc转换器用于收集微型光伏(PV)传感器的能量,并以升压模式将能量提供给超级电容器进行存储。在降压模式下,dc-dc转换器根据需要向负载提供能量。压电换能器用作辅助输入源,以确保系统自启动。提出的系统包括一个智能控件,可以自适应地调整负载处的传感器数量,从而在任何给定时间更好地利用可用能量。该实现还包括一个可编程的开关尺寸,以针对不同的负载条件优化整个系统的效率。最大功率点跟踪用于提取各种照明条件下的PV传感器的最大功率。该系统已采用CMOS 130 nm技术实现,并已在各种操作模式下进行了测试。自我启动已得到验证,并且测得的峰值效率为90.5%。

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