压电发电机AC-DC输出性能的优化与仿真研究  

The Optimization and Simulation of the AC-DC Output Performances of Piezoelectric Generator

作　　者：金文平[1] 王光庆[1] 展永政[1] 

机构地区：[1]浙江工商大学信息与电子工程学院,浙江杭州310018

出　　处：《压电与声光》2014年第4期643-647,653,共6页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(51277165);浙江省自然科学基金资助项目(Y1080037);浙江省教育厅基金资助项目(Y201223050)

摘　　要：交流-直流(AC-DC)转换电路对压电振动发电机的输出性能影响较大,为提高压电发电机AC-DC转换电路的输出性能和能量转换效率,该文首先给出了压电振动发电机系统等效电路模型,基于该模型利用力学平衡原理和电路理论推导了发电机稳态运行时AC-DC输出电压和输出功率表达式。以输出功率最大化为优化目标,通过微分计算对发电机AC-DC转换电路在不同负载电阻下的输出功率进行了优化分析,分别得到了发电机在开路谐振和短路谐振状态下优化的负载电阻、振动位移、输出电压和输出功率。仿真与对比分析了发电机优化后的输出性能,结果表明,优化AC-DC转换电路的输出性能可提高压电振动发电机的整体输出性能和能量转换效率。The AC-DC transferring circuit greatly affects the output performances of the piezoelectric vibration generator （PVG）. In order to improve the output performance and the energy conversion efficiency of the PVG,this paper presents the equivalent circuit model of the PVG at first, and the~ the analytical expressions of the AC-DC cir- cuit, such as the output voltage and the output power,are derived by using the mechanical equilibrium principle and circuit theory when the PVG operates under the steady-state. To maximize the output power of the AC-DC transfer- ring circuit,the optimization of the output power with different resistance loads are carried out by using differential calculation method,and the optimal load resistance,displacement, output voltage and output power are obtained un- der the open-circuit resonance and short-circuits resonance condition respectively. Some simulations are carried out to analyze the output performances of the PVG. The validity are performed by compared the results with the coupling a- nalysis results of Ottman and the in-phase analysis results of Guyomar. The results have shown that the optimization of the output performance of the AC-DC circuit is attributing to enhance the total performance and the energy con- version efficiency of the PVG.

关 键 词：压电振动发电机 性能优化 交流-直流(AC-DC)转换电路 仿真分析 

分 类 号：TM619[电气工程—电力系统及自动化]