Open AccessAn Up-conversion Management Circuit for Electrical Field Energy Harvester
Author(s) -
Yumei Wen,
P. Li,
Tao Han,
Xiaojun Ji
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1407/1/012061
Subject(s) - maximum power point tracking , electrical load , electrical engineering , impedance matching , constant power circuit , energy harvesting , voltage , capacitor , power (physics) , electronic engineering , engineering , electrical impedance , switched mode power supply , physics , inverter , quantum mechanics
This paper presents a high-efficiency management circuit using a maximum power point tracking (MPPT) matching circuit for power-line electrical energy harvesting. Due to small internal capacitor of the transducer and heavy load, the traditional circuit of the electrical energy harvesting at a low working frequency of 50Hz has a low transducer efficiency, and cannot be used in both low power-line voltage and heavy load. Besides, the matching impedance varies with the charging voltage. In order to achieve maximum output power during whole charging process, an up-conversion MPPT matching circuit is developed. Higher charging power, and larger ultimate charging voltage in a power-line voltage of 4000V can be obtained by using the MPPT up-conversion matching circuit. In order to drive the wireless sensor with a higher consumption power, an instantaneous discharging circuit is developed. The instantaneous discharging circuit can accumulate weak energy during a long period, and provide a higher power output in a very short time. The management circuit can drive wireless sensor with an output power of 60mW.