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요약정보
一种振动能量采集器的匹配电路研究 / Study on matching circuit of vibration energy harvester
Resource Type
Academic Journal
Authors
李志
;
宋科
;
练利锋
;
裴军芳
;
LI Zhi
;
SONG Ke
;
LIAN Lifeng
;
PEI Junfang
Source
现代电子技术 / Modern Electronics Technique
. 42(9):172-176
Subject
换能器
振动能量采集
非线性
开关匹配电路
电源管理电路
无线传感节点
Language
Chinese
ISSN
1004-373X
Online Access
Find it @ DONGA
초록
针对Terfenol-D/PZT/Terfenol-D复合磁电换能器将环境振动能量转化为电能时,在低频环境下难以实现匹配的情况,提出一种非线性开关匹配电路的方法.该电路在较小的电感和较高的开关频率下,以非线性的方式提高了复合换能器功率的匹配输出.并且针对换能器输出不能直接为无线传感节点供能的问题,设计了一种存储和电源管理电路.实验结果表明,采用非线性开关匹配电路,输出提高2.1倍,当存储超级电容电量积累到一定程度,管理电路控制瞬间放电电路放电,成功驱动最大功耗为75 mW的无线传感器节点正常工作,放电时间持续620 ms,最大放电功率可达120 mW.
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