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A high-efficiency, self-powered nonlinear interface circuit for bi-stable rotating piezoelectric vibration energy harvesting with nonlinear magnetic force

A high-efficiency, self-powered nonlinear interface circuit for bi-stable rotating piezoelectric vibration energy harvesting with nonlinear magnetic force
A high-efficiency, self-powered nonlinear interface circuit for bi-stable rotating piezoelectric vibration energy harvesting with nonlinear magnetic force
Parallel synchronized switch harvesting on inductor (P-SSHI) circuits have been proved to enhance piezoelectric vibration energy harvesting (PVEH), but the maximum conversion efficiency is obtained only when the voltage across the storage capacitor (VSC) equates to the optimal value. For bi-stable rotating PVEH with nonlinear magnetic force in engineering applications, however, the VSC will change greatly when powering real electric loads, thus it is impossible to maintain high conversion efficiency. In order to solve this problem, this paper presents an improved P-SSHI circuit with controllable optimal voltage (COV-PSSHI) by using a voltage control strategy between the storage capacitor and the electric load. The innovation is to control and maintain the VSC close to the optimal value. Firstly, the COV-PSSHI circuit is proposed and its theoretic model is built in detail. Then its average harvested power (AHP) is theoretically derived and AHP of the COV-PSSHI circuit is proved to be more than that of a classical P-SSHI circuit. In the end, experiments are performed to validate the performance of the COV-PSSHI circuit. It can be seen that the COV-PSSHI circuit can increase the AHP by factor 1.25 compared with classical P-SSHI circuits, which is enough to intermittently power the wireless sensor node. Also power consumption of the voltage control circuit has few effects on the COV-PSSHI circuit. In particular, it needs to optimize the envelop capacitor, the parallel inductor and two threshold voltages of the voltage controller in order to implement the COV-PSSHI circuit well in practice.
1383-5416
235-248
Cheng, Congcong
9f135d1e-e063-4b22-b916-4e43e082c3a0
Chen, Zhongsheng
9893f775-a26a-4ebe-a4d9-d8224838fc9d
Xiong, Yeping
51be8714-186e-4d2f-8e03-f44c428a4a49
Shi, Hongwu
6f48bcc4-04f0-44c7-b45f-80f87bc0ca95
Yang, Yongmin
ebcf182b-0882-4ca6-82f4-6f705b14d1e0
Cheng, Congcong
9f135d1e-e063-4b22-b916-4e43e082c3a0
Chen, Zhongsheng
9893f775-a26a-4ebe-a4d9-d8224838fc9d
Xiong, Yeping
51be8714-186e-4d2f-8e03-f44c428a4a49
Shi, Hongwu
6f48bcc4-04f0-44c7-b45f-80f87bc0ca95
Yang, Yongmin
ebcf182b-0882-4ca6-82f4-6f705b14d1e0

Cheng, Congcong, Chen, Zhongsheng, Xiong, Yeping, Shi, Hongwu and Yang, Yongmin (2016) A high-efficiency, self-powered nonlinear interface circuit for bi-stable rotating piezoelectric vibration energy harvesting with nonlinear magnetic force. International Journal of Applied Electromagnetics and Mechanics, 51 (3), 235-248. (doi:10.3233/JAE-150093).

Record type: Article

Abstract

Parallel synchronized switch harvesting on inductor (P-SSHI) circuits have been proved to enhance piezoelectric vibration energy harvesting (PVEH), but the maximum conversion efficiency is obtained only when the voltage across the storage capacitor (VSC) equates to the optimal value. For bi-stable rotating PVEH with nonlinear magnetic force in engineering applications, however, the VSC will change greatly when powering real electric loads, thus it is impossible to maintain high conversion efficiency. In order to solve this problem, this paper presents an improved P-SSHI circuit with controllable optimal voltage (COV-PSSHI) by using a voltage control strategy between the storage capacitor and the electric load. The innovation is to control and maintain the VSC close to the optimal value. Firstly, the COV-PSSHI circuit is proposed and its theoretic model is built in detail. Then its average harvested power (AHP) is theoretically derived and AHP of the COV-PSSHI circuit is proved to be more than that of a classical P-SSHI circuit. In the end, experiments are performed to validate the performance of the COV-PSSHI circuit. It can be seen that the COV-PSSHI circuit can increase the AHP by factor 1.25 compared with classical P-SSHI circuits, which is enough to intermittently power the wireless sensor node. Also power consumption of the voltage control circuit has few effects on the COV-PSSHI circuit. In particular, it needs to optimize the envelop capacitor, the parallel inductor and two threshold voltages of the voltage controller in order to implement the COV-PSSHI circuit well in practice.

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JAE V51 2016.pdf - Accepted Manuscript
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More information

Accepted/In Press date: 12 April 2016
e-pub ahead of print date: 8 July 2016
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 398081
URI: http://eprints.soton.ac.uk/id/eprint/398081
ISSN: 1383-5416
PURE UUID: 9980a16e-cbc9-4978-b72e-fff6e5a7e395
ORCID for Yeping Xiong: ORCID iD orcid.org/0000-0002-0135-8464

Catalogue record

Date deposited: 03 Aug 2016 09:24
Last modified: 07 Oct 2020 01:45

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