Frequency Up-Converted Low Frequency Vibration Energy Harvester Using Trampoline Effect

13th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Ju, S.^1 ; Chae, S.H.^1 ; Choi, Y.^1 ; Jun, S.^1 ; Park, S.M.^1 ; Lee, S.^1 ; Lee, H.W.^2 ; Ji, C.-H.^1

Department of Electronics Engineering, Ewha Womans University, Seoul, Korea, Republic of^1

Department of Neurology, Ewha Womans University School of Medicine, Seoul, Korea, Republic of^2

关键词: Energy harvesting device;    Frequency up conversion;    Higher output voltages;    Low-frequency vibration;    Magnetoelectric laminate composites;    Mechanical frequency;    Trampoline effects;    Transduction mechanism;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/476/1/012089/pdf
DOI  :  10.1088/1742-6596/476/1/012089

来源: IOP

【 摘 要 】

This paper presents a non-resonant vibration energy harvester based on magnetoelectric transduction mechanism and mechanical frequency up-conversion using trampoline effect. The harvester utilizes a freely movable spherical permanent magnet which bounces off the aluminum springs integrated at both ends of the cavity, achieving frequency up-conversion from low frequency input vibration. Moreover, bonding method of magnetoelectric laminate composite has been optimized to provide higher strain to piezoelectric material and thus obtain a higher output voltage. A proof-of-concept energy harvesting device has been fabricated and tested. Maximum open-circuit voltage of 11.2V has been obtained and output power of 0.57μW has been achieved for a 50kΩ load, when the fabricated energy harvester was hand-shaken.