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Design of solar photovoltaic micro-power supply for application of wireless sensor nodes in complex illumination environments

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3 Author(s)
Yongtai, H. ; Key Lab. of Photoelectronic Imaging Technol. & Syst., Beijing Inst. of Technol., Beijing, China ; Lihui, L. ; Yanqiu, L.

The advantages of the wireless sensor nodes, integrated with the solar photovoltaic (PV) micro-power supply, have been proved, and some design technologies of the solar PV micro-power supply have been proposed in the previous report. However, using the wireless sensor nodes integrated with the solar PV micro-power supply is limited in complex illumination conditions because of the low energy conversion efficiency of the solar PV micro-power supply. To enlarge application environment of the wireless sensor nodes integrated with the solar PV micro-power supply, it is crucial to enhance the energy conversion efficiency of the solar PV micro-power supply in complex illumination conditions. In the study, a novel solar PV micro-power supply using the optimal voltage control technique and the solar cells array in series-parallel has been designed. Moreover, the wireless sensor node integrated with the solar PV micro-power supply has been achieved. In different illumination environments, the performances of the solar PV micro-power supply have been tested. According to test results, the solar PV micro-power supply can keep high output conversion efficiency and the output stability in complex illumination conditions.

Published in:

Wireless Sensor Systems, IET  (Volume:2 ,  Issue: 1 )