摘要
设计基于同步电感及buck-boost转换器的接口技术—SCEI(Synchronous Charge Extraction and Inversion),完成该接口技术在恒定激振位移、恒定激振力情况下回收功率的理论分析及计算。理论计算表明,在恒定激振位移下忽略buck-boost转换效率时SCEI的回收功率大于Parallel-SSHI技术最大回收功率,且该回收功率与负载无关;在恒定激振力下SCEI回收功率与SECE技术特性相似;通过实验比较设计的SCEI技术与4种经典技术在相同激振位移下的回收功率。实验结果表明,SCEI技术回收功率约为SECE的1.5倍,且与负载无关。
The interface techniques play a vital role in the piezoelectric energy harvesting system.Classical techniques including Standard,SECE,Series-SSHI,Parallel-SSHI techniques have been developed to improve the harvested power.In the paper,a new technique called SCEI （Synchronous Charge Exctraction and Inversion）,including a synchronous inductor and a buck-boost converter,was presented and the theoretical harvested powers were calculated considering the circumstances of constant displacement amplitude and constant force amplitude respectively.Theoretical results show that the harvested power of SCEI technique is larger than the maximum harvested power of Parallel-SSHI when ignoring the buck-boost converter＇s efficiency under the circumstance of constant displacement amplitude.Furthermore, the harvested powers of the SCEI and SECE techniques have similar features when the generator is driven with constant driving force amplitude.Experimental measurements were carried out to present a comparison between Standard,SECE, Series-SSHI,Parallel-SSHI and SCEI techniques when the generator is driven with constant displacement amplitude.The experimental results show that the proposed technique dramatically increases the harvested power,which is not influenced by the load resistance value,by almost up to 150% compared with the SECE technique in the same vibration condition.
出处
《振动与冲击》
EI
CSCD
北大核心
2015年第2期107-113,共7页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(51075202)
航空科学基金资助项目(2012ZA52009)
关键词
能量回收
压电效应
接口技术
机电转换
energy harvesting
piezoelectric effect
interface circuit
electromechanical conversion
