直激式压电风力发电机的结构及其特性

Structure and Characteristics of Direct-Excited Piezoelectric Wind Energy Harvester

随着无线传感网络技术的日趋成熟及其在环境监测等领域应用的普及,为其供电的微小型流体发电机研究受到国内外学者的广泛关注,其中利用压电进行风能回收已成为一个研究热点。首先,介绍了现有压电风力发电机的优势、特点及适用场合;其次,重点对直激式压电风力发电技术的发展概况与研究进展进行了分析与总结,归纳了直激式压电风力发电机的主要结构、基本原理、特性及应用情况;最后指出目前直激式压电风力发电机以梁式结构为主,振动方式以颤振和弛振为主,且缺乏统一的数学模型,以及现有的发电机存在结构可靠性低、稳定性较差等问题。以宽频带、高可靠性和集群布置为进一步发展趋势,以期推动直激式压电风力发电机的进一步发展与应用。

With the growing maturity of wireless sensor network technology and its popularization in the field of environmental monitoring and other fields,the research of micro fluid generator for its power supply has been widely concerned by domestic and foreign scholars,and the wind energy harvester based on the piezoelectricity has become a research hotspot.Firstly,the advantages and characteristics and application occasions of the existing piezoelectric wind harvesterare introduced.Secondly,the development and research progress of the direct-excited piezoelectric wind energy harvester（DEPWEH）areanalyzed and summarized,and the main structures,principle,characteristics and applications of DEPWEH summarized.At the end,it is pointed out that the direct-excited piezoelectric wind energy harvesters are mainly beam-type structures,and the vibration modes are mainly flutter and galloping.There is still no unified mathematical model and the existing generators have the disadvantages of low structural reliability/stability.With the development trend of broadband,high reliability and cluster layout,the further development and applications of direct-excited piezoelectric wind energy harvester are expected.