Abstract
Capturing vibration energy from the environment by vibration energy harvesters (VEHs) to power electronic devices such as wireless sensor nodes has become a hot research topic. However, the narrow bandwidth of linear VEHs and the low excitation frequency results in low output power in the actual environmental vibration featuring multiple frequencies. To overcome this limit, this paper proposes an electromagnetic VEH utilizing dual magnetic springs for both broadband and frequency up-conversion. Under the excitation with low acceleration, the cylindrical magnet and the ring one reciprocate synchronously and their corresponding nonlinear magnetic springs help broadband. When the excitation acceleration exceeds a certain threshold, the cylindrical magnet separates from ring one and their interacted magnetic pull realizes the cylindrical magnet’s frequency up-conversion. Firstly, the versatile VEH utilizing nonlinear magnetic spring is compared with that using linear mechanical spring by simulation analysis and the results show that the former mechanism is superior to the latter one. Afterward, the broadband of the proposed architecture under the excitation of small acceleration is validated by simulation.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.