Affiliations: [a] Faculty of Mechanical Engineering & Automation, Zhejiang Sci-Tech University, Hangzhou, Zhejiang, China | [b] State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi, China | [c] Key Laboratory of Space Utilization, Technology and Engineering Center for space Utilization, Chinese Academy of Sciences, Beijing, China
Abstract: In order to meet energy consumption of the electronics and reuse the
structural vibration energy, this study investigates a novel electromagnetic
energy harvesting (EEH) method by employing a step-up and step-down circuit.
The principle of the EEH system is introduced, and the electrical governing
equation of the harvesting circuit is analyzed. A cantilever beam structure
with EEH system is built up. The theoretical model is established and the
corresponding experiment is setup to verify the energy harvesting
performance of the EEH circuit. The experimental results prove that the
proposed EEH system is able to harvest the vibrational energy and
effectively step-up and step-down the harvested signal by changing the duty
circle of the control circuit. Finally, the self-powered ratio of the EEH
system is proposed and analyzed, which reaches to 6.1% for an electric
circuit with 0.1 W consumption. The EEH method provides an effective
self-powered solution for the low power consumption electronics.
Keywords: Energy harvesting, vibration, electromagnetic
