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.
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