Study of a Low-Power-Consumption Piezoelectric Energy Harvesting Circuit Based on Synchronized Switching Technology

Jianfeng Hong, Fu Chen, Ming He, Sheng Wang, Wenxiang Chen and Mingjie Guan
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Jianfeng Hong: Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361005, China
Fu Chen: Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361005, China
Ming He: Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361005, China
Sheng Wang: Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361005, China
Wenxiang Chen: Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361005, China
Mingjie Guan: Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361005, China

Energies, 2019, vol. 12, issue 16, 1-13

Abstract: This paper presents a study of a piezoelectric energy harvesting circuit based on low-power-consumption synchronized switch technology. The proposed circuit includes a parallel synchronized switch harvesting on inductor interface circuit (P-SSHI) and a step-down DC-DC converter. The synchronized switch technology is applied to increase the conversion efficiency of the circuit. The DC-DC converter is used to accomplish the impedance matching for different loads. A low-power-consumption microcontroller and discrete components are used to build the P-SSHI interface circuit. The study starts with theoretical analysis and simulations of the P-SSHI interface circuit. Simulations and experiments were conducted to validate the theoretical analysis. The experimental results show that the maximum energy harvested by the system with a P-SSHI interface circuit is 231 μW, which is 2.89 times that of a system without the P-SSHI scheme. The power consumption of the P-SSHI interface circuit can be as low as 10.6 μW.

Keywords: piezoelectric; energy harvesting; interface circuit; power consumption; synchronized switching (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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