摘要
为了提高压电式振动能量回收系统的能量回收能力和解决在负载变化使能量回收效率变差的问题,以悬臂梁式压电振动发电系统为例,提出了一种高效的压电振动能量收集电路设计方案,即并联型双同步开关电感接口电路,可将压电梁转换振动能量得到的电能高效地储存到电容中。实验结果表明,压电梁在频率为38.4Hz、加速度有效值为0.035m/s2振动激励下工作时,给出的并联双同步开关能量回收(P-DSSH)接口电路可释放的瞬时功率达0.25mW,是全桥整流接口电路(SEH)最优功率的5.8倍,是并联同步开关电感(P-SSHI)接口电路可释放的瞬时功率的2.2倍,是LTC3588-1电路可释放的瞬时功率的1.27倍,且其工作不受负载变化的影响。
In order to improve the energy recovery ability of piezoelectric vibration energy recovery system and solve the problem of recovery efficiency decreased by load change,a high efficient design scheme of piezoelectric vibration energy harvesting circuit is presented by using the piezoelectric vibration power generation system as an example,that is,the parallel double synchronous switch inductive interface circuit.The electric energy which is converted from the vibration energy by the piezoelectric vibration beam can be effectively stored in the capacitor.The experimental results show that the piezoelectric beam is working at the vibration excitation frequency of 38.4 Hz and the acceleration effective value arms of 0.035 m/s2.The instantaneous power of the parallel dual synchronous switch harvesting（P-DSSH）interface circuit is up to 0.25 mW,that is 5.8 times of the full bridge rectifier circuit（SEH）interface circuit optimal power,2.2 times of the instantaneous power of the（P-SSHI）interface circuit connected in parallel with the inductive interface circuit of the synchronous switch and 1.27 times of the instantaneous power released by LTC3588-1 circuit.The operation is not affected by load variation.
出处
《压电与声光》
CSCD
北大核心
2017年第5期770-775,共6页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(50907042)
石河子大学高层次人才科研启动基金资助项目(RZCX201544)
关键词
能量收集
并联双同步开关能量回收电路(P-DSSH)
压电振动
接口电路
能量回收效率
energy co l le c t io n
p ara llel dual sy n ch ro no u s swi tch h a rv e s t in g c i rc u i t （P-DSSH）
piezoelectric v ib ra -tion
interface circui t
en e rgy recovery efficiency
