中文摘要：

提出了一种新型的压电能量回收器件，通过一个开关功率变换器的辅助，系统的能量转换效率可提高400％。该功率变换器原型为Buck-Boost变压器，本项研究通过低功耗的控制电路对其进行了优化。利用Pspice软件对整个系统电路进行了建模和仿真，仿真结果显示，优化后的能量回收器件输出功率提高了3．4倍。

英文摘要：

A high efficiency piezoelectric energy harvester is designed and experiment results show that the power transformation efficiency of the piezoelectric energy harvester can be enhanced by more than 400% by applying a switching power converter. This switching power converter is derived from Buck- Boost converter, and it is o The the whole circuitry is mode ptlmlZ led an ed using a control circuitry of low power consumption in this work. d simulated in the Pspice software. The simulation results show that output power of proposed energy harvester increases by 3.4 times after optimization.