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Min-Gyu Kang, R. Sriramdas, Hyeon Lee, Jinsung Chun, D. Maurya, Geon‐Tae Hwang, J. Ryu, S. Priya (2018)
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dual-mode, energy harvesting, magneto-mechano-electric coupling, mechanical coupling Received
Zhonghui Yu, Zhaoqiang Chu, Jikun Yang, Mohammad Asl, Zhanmiao Li, S. Dong (2021)
Enhancing weak magnetic field MME coupling in NdFeB magnet/piezoelectric composite cantilevers with stress concentration effectApplied Physics Letters, 118
R. Sriramdas, Min-gyu Kang, Miao Meng, M. Kiani, J. Ryu, M. Sanghadasa, S. Priya (2020)
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Zhonghui Yu, Zhaoqiang Chu, Jikun Yang, Mohammad Asl, Xiaoting Yuan, Yang Yu, G. Nie, H. Qi, S. Dong (2020)
A magneto-mechano-electric (MME) energy harvester based on rectangular cymbal structureSensors and Actuators A-physical, 316
The microenergy harvesting based on magneto‐mechano‐electric (MME) coupling is an emerging technology for powering wireless Internet of Things (IoT) devices because it is capable of simultaneously harvesting magnetic field energy and mechanical energy. However, further improvement in output power of conventional cantilever‐structured MME energy harvesters has met with considerable difficulties due to the inherent, high mechanical energy loss in single‐mode operation. To solve the predicament, here, this work presents a symmetric, mechanical coupled dual‐mode MME energy harvester for restricting clamp loss and then enhancing MME coupling and output power. Under a weak AC magnetic field (Hac = 4 Oe) at 60 Hz, the MME energy harvester operating in symmetric dual‐mode can generate a peak‐peak output power of 72 mWpp (root‐mean‐square value: 9 mWRMS), a 437% enhancement over a conventional single‐mode MME energy harvester, which can even drive 160 light emitting diodes (LEDs) lighting directly. A realistic application furtherly shows that the symmetric dual‐mode MME energy harvester can successfully scavenge the magnetic field energy around a household appliance, and the generated electric power can directly drive a wireless IoT system in real time. The proposed concept of symmetric dual‐mode in this work can open new avenues for future vibration‐based energy harvesters design.
Advanced Energy Materials – Wiley
Published: Nov 1, 2022
Keywords: clamp loss; dual‐mode; energy harvesting; magneto‐mechano‐electric coupling; mechanical coupling
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