A self-powered synchronous voltage inversion and charge extraction circuit for piezoelectric energy harvesting

Liu, Hongsheng, Zhang, Bin and Xiong, Yeping (2021) A self-powered synchronous voltage inversion and charge extraction circuit for piezoelectric energy harvesting. The 8th International Conference on Vibration Engineering, Shanghai, China, Shanghai, China. 23 - 26 Jul 2021. 6 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

In this paper, a new piezoelectric energy harvesting interface named synchronous voltage inversion and charge extraction circuit (SVICE) is proposed based on the Parallel-SSHI (Parallel Synchronized Switch Harvesting on Inductor) and SECE (Synchronous Electric Charge Extraction) circuits. In this circuit, the voltage inversion and charge extraction are carried out synchronously, which not only increases the output power but also improves the load adaptability. The proposed scheme can realize cold-start and self-powered thanks to the peak detection switch circuit, implementation with the capability of extracting energy twice in one vibration cycle. Finally, the simulation results show that the proposed circuit can enhance the maximum harvesting power by nearly eight times compared with the standard rectifier bridge circuit and high power output can be guaranteed over a wide range of load resistors or rectified voltages.

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