Switching delay in self-powered nonlinear piezoelectric vibration energy harvesting circuit: mechanism, effects and solution
Switching delay in self-powered nonlinear piezoelectric vibration energy harvesting circuit: mechanism, effects and solution
Self-powered synchronized switching harvesting on an inductor (SSHI) circuits have been proved to greatly increase the performance of a PVEH device and peak detector-based self-powered switches are widely used. In practice, however, the switch is impossible to turn on simultaneously at peak displacements due to nonlinear components, so that switching delay(SD) always exists. Furthermore, the SD will degrade the performance of PVEH devices, so it must be reduced. Therefore, for this kind of SSHI circuits, the purpose of this paper is to explore basic causes of generating SD and investigate the corresponding solution. Firstly, theoretical model of SD in self-powered parallel (SP-PSSHI) is derived and the SD is first proved to be positive. Then effects of key component parameters on the SD are studied. Based on above results, an improved SP-PSSHI (ISP-PSSHI) circuit is proposed by adding a voltage divider and its SD is proved to be less than that of the SP-PSSHI circuit. Circuit simulations validate theoretical results and also expose that there are optimal resistor and capacitor of the envelope detector for achieving the maximum harvested power. In the end, experimental results show that the ISP-PSSHI circuit can improve the averaged harvested power about 11 percent more than that of the SP-PSSHI circuit under choosing optimal components.
Capacitors, Delays, Energy harvesting, Envelope detectors, Piezoelectric structures, Self-powered nonlinear switch, Switches, Switching circuits, Switching delay, Vibration energy harvesting, Vibrations
2427-2440
Chen, Zhongsheng
9893f775-a26a-4ebe-a4d9-d8224838fc9d
He, Jing
b66c81f0-2d9b-449e-adc8-f88f7a038c7e
Liu, Jianhua
983d0f31-69e4-42a4-b1a5-a9e40a19dca9
Xiong, Yeping
51be8714-186e-4d2f-8e03-f44c428a4a49
March 2019
Chen, Zhongsheng
9893f775-a26a-4ebe-a4d9-d8224838fc9d
He, Jing
b66c81f0-2d9b-449e-adc8-f88f7a038c7e
Liu, Jianhua
983d0f31-69e4-42a4-b1a5-a9e40a19dca9
Xiong, Yeping
51be8714-186e-4d2f-8e03-f44c428a4a49
Chen, Zhongsheng, He, Jing, Liu, Jianhua and Xiong, Yeping
(2019)
Switching delay in self-powered nonlinear piezoelectric vibration energy harvesting circuit: mechanism, effects and solution.
IEEE Transactions on Power Electronics, 34 (3), .
(doi:10.1109/TPEL.2018.2845701).
Abstract
Self-powered synchronized switching harvesting on an inductor (SSHI) circuits have been proved to greatly increase the performance of a PVEH device and peak detector-based self-powered switches are widely used. In practice, however, the switch is impossible to turn on simultaneously at peak displacements due to nonlinear components, so that switching delay(SD) always exists. Furthermore, the SD will degrade the performance of PVEH devices, so it must be reduced. Therefore, for this kind of SSHI circuits, the purpose of this paper is to explore basic causes of generating SD and investigate the corresponding solution. Firstly, theoretical model of SD in self-powered parallel (SP-PSSHI) is derived and the SD is first proved to be positive. Then effects of key component parameters on the SD are studied. Based on above results, an improved SP-PSSHI (ISP-PSSHI) circuit is proposed by adding a voltage divider and its SD is proved to be less than that of the SP-PSSHI circuit. Circuit simulations validate theoretical results and also expose that there are optimal resistor and capacitor of the envelope detector for achieving the maximum harvested power. In the end, experimental results show that the ISP-PSSHI circuit can improve the averaged harvested power about 11 percent more than that of the SP-PSSHI circuit under choosing optimal components.
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More information
Accepted/In Press date: 7 June 2018
e-pub ahead of print date: 8 June 2018
Published date: March 2019
Keywords:
Capacitors, Delays, Energy harvesting, Envelope detectors, Piezoelectric structures, Self-powered nonlinear switch, Switches, Switching circuits, Switching delay, Vibration energy harvesting, Vibrations
Identifiers
Local EPrints ID: 421973
URI: http://eprints.soton.ac.uk/id/eprint/421973
ISSN: 0885-8993
PURE UUID: fa38950a-cd4a-4db9-9623-ad2fc9da5c48
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Date deposited: 12 Jul 2018 16:30
Last modified: 16 Mar 2024 03:17
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Author:
Zhongsheng Chen
Author:
Jing He
Author:
Jianhua Liu
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