Design and Implementation of Piezoelectric Energy Harvesting Circuit with Adaptive Inductor Sharing Strategy

被引：0
|
作者：
Fan S. [1 ]
Zhu Y. [1 ]
Wang B. [1 ]
Ma W. [1 ]
Zhang G. [1 ]
机构：
[1] Faculty of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an
来源：
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | 2022年 / 56卷 / 05期
关键词：
Impedance matching converter; Inductor sharing strategy; Maximum power point tracking; Piezoelectric energy harvesting; Rectifier; Self-powering;
D O I：
10.7652/xjtuxb202205010
中图分类号：
学科分类号：
摘要：
A battery-powered sensing device may fail for limited battery life or electrical depletion of the device itself. To solve the problem, a piezoelectric energy harvesting circuit with the adaptive inductor sharing strategy is proposed in this paper. The energy of mechanical vibration in the environment can be converted to electric energy to power the sensing device. This can enable self-powering and significantly lengthened life of the sensing device. Based on original structures of the P-SSHI and buck-boost power stage-based impedance matching converter, the proposed circuit with the "first come, first served" adaptive inductor sharing strategy requires no use of an arbiter. Thus, the circuit is greatly simplified, and the system that only requires a single inductor is realized, which improves the integration. Additionally, sharing-caused competition is analyzed, the entire circuit is further optimized, and the MPPT algorithm is realized. The standard 180 nm CMOS process is applied for circuit design. The simulation results show that the bias-flip rectifier has an output power up to 55.01 μW and 111.59 μW under the OCV of 2 V and 3 V respectively. Compared with a conventional full-bridge rectifier, it increases the output power by 6.4 times and 4.48 times respectively. With the inductor sharing strategy, the peak output power of the converter can reach 110.04 μW. Compared with that without such a strategy, the peak output power is increased by 7.9% and the peak PCE reaches 91%. The self-powered piezoelectric energy harvesting system is expected to solve the power supply problem of existing sensing devices. © 2022, Editorial Office of Journal of Xi'an Jiaotong University. All right reserved.
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页码：95 / 104
页数：9
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