基于梯形回环的低频双晶压电俘能器特性分析  

Characteristic Analysis of a Low-frequency Piezoelectric Bimorph Energy Harvester Based on Trapezoidal-Loop

作　　者：江兵[1] 袁帅[1] 陈丽娟[2] 王强[1] 陈红[1] 张华清[1] 曹昆[1] 

机构地区：[1]南京邮电大学自动化学院,南京210046 [2]东南大学电气工程学院,南京210096

出　　处：《控制工程》2015年第2期342-346,共5页Control Engineering of China

基　　金：国家自然科学基金项目(51107010;11202107;61203213);江苏省高校自然科学基金项目(11KJB130002);江苏省科技支撑计划项目(BE2011843);高等学校博士学科点专项科研基金项目(20113223120008)

摘　　要：针对如何实现微机电系统器件长时间供能已成为亟待解决的问题,提出了一种基于梯形回环的低频双晶压电俘能器,建立了ANSYS有限元分析模型,对其进行了静态分析、模态分析和谐响应分析,将梯形回环俘能器的特性和矩形回环俘能器的特性进行比较。仿真结果表明,在相同发电面积和相同结构的情况下,基于梯形回环的压电俘能器的输出电压比传统的矩形回环的压电俘能器电压提高了115%;引入边峰抑制比(SPI)来衡量其宽频俘能能力,梯形回环双晶压电俘能器宽频能力较传统的矩形回环压电俘能器提高了5%。How to power MEMS device for a long time has become an urgent problem to be solved. A new low-frequency piezoelectric bimorph energy harvester based on trapezoidal-loop is proposed. The geometric model and finite element model are set up. The static analysis, modal analysis and harmonic response analysis of the trapezoidal-loop piezoelectric energy harvester are discussed by using the Finite Element Analysis. Then the rectangular-loop piezoelectric energy harvester is compared with the trapezoidal-loop piezoelectric energy harvester. Comparing the new TLPZG with the traditional rectangular-loop piezoelectric energy harvester, the output power is increased by 115 % with little change in the resonant frequency under the similar structure and the same ceramic area, and the capability of broad-band energy harvesting rises 5 % by using the indicator of the inhibition of the side peak （SPI）.

关 键 词：压电俘能器 有限元分析 梯形回环 边峰抑制比(SPI) 宽频 

分 类 号：TP27[自动化与计算机技术—检测技术与自动化装置]