A miniaturized electromagnetic energy harvester with volt-level output based on stacked flexible coils

The bottleneck of the miniaturized electromagnetic vibration energy harvester (EVEH) device is the limited output voltage and power. Commonly reported mV-level AC output of the EVEHs cannot be rectified and used. In this work, we report a cost-effective EVEH device based on batch-fabricated flexible...

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Bibliographic Details
Published in:Smart materials and structures 2018-11, Vol.27 (11), p.115040
Main Authors: Li, Yunjia, Cao, Qi, Zhang, Wei, Zhang, Yong, Cao, Jian'an
Format: Article
Language:English
Subjects:
electromagnetic
energy harvester
planar coil
polymer microsystems
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Summary:The bottleneck of the miniaturized electromagnetic vibration energy harvester (EVEH) device is the limited output voltage and power. Commonly reported mV-level AC output of the EVEHs cannot be rectified and used. In this work, we report a cost-effective EVEH device based on batch-fabricated flexible springs and coils. At an acceleration of 1 g peak-to-peak amplitude ( 9.8 m s−2), a maximum output peak-to-peak voltage of 1.57 V and an output power of 91.8 W are measured, at a frequency of 66 Hz. The output voltage of the EVEH is successfully rectified, amplified (passively) and used to charge a supercapacitor.
ISSN:0964-1726
1361-665X
DOI:10.1088/1361-665X/aae239