一种适用于强耦合压电能量采集器的非对称电压接口电路

doi:10.16180/j.cnki.issn1007-7820.2024.12.003

电子科技 ›› 2024, Vol. 37 ›› Issue (12): 17-23.doi: 10.16180/j.cnki.issn1007-7820.2024.12.003

一种适用于强耦合压电能量采集器的非对称电压接口电路

沈行风, 袁天辰, 杨俭, 宋瑞刚

上海工程技术大学城市轨道交通学院,上海 201620

收稿日期:2023-04-10 出版日期:2024-12-15 发布日期:2024-12-16
作者简介:沈行风(1998-),男,硕士研究生。研究方向:压电俘能装置接口电路。
袁天辰(1988-),男,博士,副教授。研究方向:非线性振动。
杨俭(1962-),男,博士,教授。研究方向:城市轨道交通车辆运行节能技术。
基金资助:
国家自然科学基金(11802170);国家自然科学基金(51575334);上海市“晨光计划”(18CG66)

An Asymmetric Voltage Interface Circuit for Strong Coupling Piezoelectric Energy Harvesters

SHEN Xingfeng, YUAN Tianchen, YANG Jian, SONG Ruigang

School of Urban Rail Transit,Shanghai University of Engineering Science,Shanghai 201620,China

Received:2023-04-10 Online:2024-12-15 Published:2024-12-16
Supported by:
National Natural Science Foundation of China(11802170);National Natural Science Foundation of China(51575334);Shanghai“Chenguang”Project(18CG66)

摘要/Abstract

摘要：

在弱耦合压电能量采集系统中,串联同步开关采集接口电路(Series Synchronous Switch Harvesting Interface Circuit, S-SSHI)、并联同步开关采集接口电路(Parallel Synchronous Switch Harvesting Interface Circuit, P-SSHI)、同步电荷提取接口电路(Synchronous Charge Extraction Interface Circuit, SECE)比全波整流接口电路(Full-Wave Rectifier Bridge, FB)能够获得更大的输出电压和俘能功率。在强耦合系统下,S-SSHI、P-SSHI、SECE接口电路对输出电压的增益效果并不明显。为解决该问题,文中提出了一种非对称电压接口电路。该电路由单个电压检测开关和全波整流桥组成,当充电电容电压接近压电能量采集器(Piezoelectric Energy Harvester, PEH)的开路电压时,PEH的电压开始偏置。在偏置电压作用下,非对称电压接口电路的最大输出电压高于FB,因此非对称电压接口电路可提高俘获能量。非对称电压接口电路的仿真结果和实验结果一致。非对称电压接口电路在强耦合实验下的俘能能量为0.532 J,与FB相比,其俘获能量提高了147%,与其他改进接口电路相比,其俘获能量提高了75%。

关键词: 压电能量采集, 接口电路, 俘获能量, 俘能功率, 非对称电压, 串联同步开关, 并联同步开关, 同步电荷提取

Abstract:

The S-SSHI(Series Synchronous Switch Harvesting Interface Circuit), P-SSHI(Parallel Synchronous Switch Harvesting Interface Circuit ), and SECE(Synchronous Charge Extraction Interface Circuit) obtain higher output voltage and harvested power than the FB(Full-Wave Rectifier Bridge) in weakly coupled piezoelectric energy harvesting system. The S-SSHI, P-SSHI, and SECE interface circuits do not have an obvious effect gain on output voltage under strong coupling systems. To solve this problem, an asymmetric voltage interface circuit is proposed in this study. The circuit consists of a single voltage detection switch and a full wave rectifier bridge. When the charging capacitor voltage approaches the open-circuit voltage of the PEH(Piezoelectric Energy Harvester), the PEH voltage begins to be biased. The maximum output voltage of the asymmetric voltage interface circuit is higher than FB because of the bias voltage, so the asymmetric voltage interface circuit can improve the harvested energy. The simulation results of asymmetric voltage interface circuit are consistent with the experimental results. The captured energy of the asymmetric voltage interface circuit is 0.532 J under the strong coupling system. The captured energy of the asymmetric voltage interface circuit is 147% higher than FB and 75% higher than other improved interface circuits.

Key words: piezoelectric energy harvesting, interface circuit, capture energy, captured energy power, asymmetric voltage, series synchronous switch, parallel synchronous switch, synchronous charge extraction

中图分类号:

TN86

沈行风, 袁天辰, 杨俭, 宋瑞刚. 一种适用于强耦合压电能量采集器的非对称电压接口电路[J]. 电子科技, 2024, 37(12): 17-23.

SHEN Xingfeng, YUAN Tianchen, YANG Jian, SONG Ruigang. An Asymmetric Voltage Interface Circuit for Strong Coupling Piezoelectric Energy Harvesters[J]. Electronic Science and Technology, 2024, 37(12): 17-23.

图/表 11

图1

图2

表1

表2

非对称电压接口电路的主要参数"

元器件	型号	主要参数
PNP三极管	2N3906	V_BE=-0.7 V,V_CE=-0.25 V
N-MOS	2N7000	$V G S (t h e)$ =3 V
肖特二极管	1N5819	V_D=0.6 V
电感	-	L₂=50 mH
电容	-	C₂=2.2 nF,C₃=2 200 μF
电阻	-	R₂=200 kΩ,R₃=750 kΩ

表2

表3

稳态下CP、C2、C3仿真与理论计算电压对比"

类型	V $x C P$ /V	$V C 2$ /V	$V C 3$ /V
理论	23.27	23.04	22.07
仿真	23.27	23.05	22.07

表3

图3

图4

图5

图6

图7

表4

参考文献 21

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PEH参数	数值	等效电参数	数值
质量M/kg	0.100 0	电感L₁/H	0.100 0
阻尼C/Ns·m^-1	12.560 0	电阻R₁/Ω	12.560 0
刚度K/kN·m^-1	39 478	电容C₁/μF	25.300 0
电容C_P/nF	48.120 0	电容C_P/nF	48.120 0
机电耦合系数χ/N·V^-1	0.017 1	理想变压比P₁∶S₁	0.017 1

接口电路	仿真俘获能量/J	仿真最大俘能功率/mW	实验俘获能量/J	实验最大俘能功率/mW	元器件数
FB	0.241	1.12	0.216	0.94	5
P-SSHI	0.368	1.64	0.238	1.17	13
S-SSHI	0.227	1.44	0.095	0.41	11
SECE	0.523	0.89	0.303	0.61	11
本文	0.536	0.89	0.532	0.81	11

一种适用于强耦合压电能量采集器的非对称电压接口电路

An Asymmetric Voltage Interface Circuit for Strong Coupling Piezoelectric Energy Harvesters

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