A Self-Powered Hybrid SSHI Circuit with a Wide Operation Range for Piezoelectric Energy Harvesting
1
School of Electronic Information and Electrical Engineering, Changsha University, Changsha 410022, China
2
School of Automatic, Northwestern Polytechnical University, Xi’an 710072, China
*
Author to whom correspondence should be addressed.
Sensors 2021, 21(2), 615; https://doi.org/10.3390/s21020615
Received: 30 November 2020
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Revised: 13 January 2021
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Accepted: 14 January 2021
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Published: 17 January 2021
(This article belongs to the Special Issue Advanced Interface Circuits for Sensor Systems)
This paper presents a piezoelectric (PE) energy harvesting circuit, which integrates a Synchronized Switch Harvesting on Inductor (SSHI) circuit and a diode bridge rectifier. A typical SSHI circuit cannot transfer the power from a PE cantilever into the load when the rectified voltage is higher than a certain voltage. The proposed circuit addresses this problem. It uses the two resonant loops for flipping the capacitor voltage and energy transfer in each half cycle. One resonant loop is typically used for the parallel SSHI scheme, and the other for the series SSHI scheme. The hybrid SSHI circuit using the two resonant loops enables the proposed circuit’s output voltage to no longer be limited. The circuit is self-powered and has the capability of starting without the help of an external battery. Eleven simple discrete components prototyped the circuit. The experimental results show that, compared with the full-bridge (FB) circuit, the amount of power harvested from a PE cantilever and the Voltage Range of Interest (VRI) of the proposed circuit is increased by 2.9 times and by 4.4 times, respectively. A power conversion efficiency of 83.2% is achieved.
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MDPI and ACS Style
Wu, L.; Zhu, P.; Xie, M. A Self-Powered Hybrid SSHI Circuit with a Wide Operation Range for Piezoelectric Energy Harvesting. Sensors 2021, 21, 615. https://doi.org/10.3390/s21020615
AMA Style
Wu L, Zhu P, Xie M. A Self-Powered Hybrid SSHI Circuit with a Wide Operation Range for Piezoelectric Energy Harvesting. Sensors. 2021; 21(2):615. https://doi.org/10.3390/s21020615
Chicago/Turabian StyleWu, Liao, Peidong Zhu, and Minghua Xie. 2021. "A Self-Powered Hybrid SSHI Circuit with a Wide Operation Range for Piezoelectric Energy Harvesting" Sensors 21, no. 2: 615. https://doi.org/10.3390/s21020615
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