Contact-Separation Mode Electret Generator Supported by Magnets

A large number of widely distributed sensor networks pose a major challenge to distributed energy. Traditional batteries are not environmentally friendly and also cause additional time and economic costs. Generators that harvest environmental vibration energy have become a potential solution. In this paper, a novel contact-separation mode electret generator supported by magnets is proposed for vibration energy collection. Under low frequency vibration (15 Hz), the maximum output open-circuit voltage is 300 V, and the maximum instantaneous output power of 0.725 mW is achieved under the optimal load resistance of 20 MΩ. Finally, we provide directions for further improvement and optimization of the design.