Design and experimental investigation of a low-voltage thermoelectric energy harvesting system for wireless sensor nodes

2017 ◽  
Vol 138 ◽  
pp. 30-37 ◽  
Author(s):  
Mingjie Guan ◽  
Kunpeng Wang ◽  
Dazheng Xu ◽  
Wei-Hsin Liao
Keyword(s):  
Experimental Investigation ◽  
Energy Harvesting ◽  
Low Voltage ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Wireless Sensor Nodes ◽  
Thermoelectric Energy ◽  
Thermoelectric Energy Harvesting ◽  
Energy Harvesting System

An Ultra Low Voltage Resonant Converter for Thermoelectric Energy Harvesting

2013 ◽  
Vol 772 ◽  
pp. 731-734
Author(s):  
Shi Zhong Guo ◽  
Kai Xie ◽  
Ying Hao Ye ◽  
Xiao Ping Li
Keyword(s):  
Energy Harvesting ◽  
Low Voltage ◽  
Power Converter ◽  
Resonant Converter ◽  
Transfer Energy ◽  
Thermoelectric Energy ◽  
Thermoelectric Energy Harvesting ◽  
Energy Transducer ◽  
Energy Harvesting System ◽  
Energy Buffer

This paper presents a ultra low voltage resonant converter for thermoelectric energy harvesting.A key challenge in designing energy harvesting system is that thermoelectric generators output a very low voltage (-0.3V~0.3V). Therefore, a power converter is used to boost the output voltage of the energy transducer and transfer energy into an energy buffer for storage. The converter operates from input voltages ranging from-500mV to-60mV and 60mV to 500mV while supplying a 4.2 V DC output. The converter consumes 88μW of quiescent power, delivers up to 1.6 (1.8) mW of output power, and is 65(67)% efficient for a-100mV and 100mV input, respectively.

scholarly journals A Nonlinear Electromagnetic Energy Harvesting System for Self-Powered Wireless Sensor Nodes

2019 ◽  
Vol 8 (1) ◽  
pp. 18 ◽  
Author(s):  
Kankan Li ◽  
Xuefeng He ◽  
Xingchang Wang ◽  
Senlin Jiang
Keyword(s):  
Energy Harvesting ◽  
Electromagnetic Energy ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Wireless Sensor Nodes ◽  
Interface Circuit ◽  
Electromagnetic Energy Harvesting ◽  
Energy Harvesting System ◽  
Self Powered ◽  
Nonlinear Interface

The Internet of things requires long-life wireless sensor nodes powered by the harvested energy from environments. This paper proposes a nonlinear electromagnetic energy harvesting system which may be used to construct fully self-powered wireless sensor nodes. Based on a nonlinear electromagnetic energy harvester (EMEH) with high output voltage, the model of a nonlinear interface circuit is derived and a power management circuit (PMC) is designed. The proposed PMC uses a buck–boost direct current-direct current (DC–DC) converter to match the load resistance of the nonlinear interface circuit. It includes two open-loop branches, which is beneficial to the optimization of the impedance matching. The circuit is able to work even if the stored energy is completely drained. The energy harvesting system successfully powered a wireless sensor node. Experimental results show that, under base excitations of 0.3 g and 0.4 g (where 1 g = 9.8 m·s−2) at 8 Hz, the charging efficiencies of the proposed circuit are 172% and 28.5% higher than that of the classic standard energy-harvesting (SEH) circuit. The experimental efficiency of the PMC is 41.7% under an excitation of 0.3 g at 8 Hz.

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