压电发电器建模研究

压电发电器的优化设计必须以模型为基础。提出了一种新的压电发电器模型建立方法,运用该方法分别推导出2种结构的压电发电器的性能参数表达式,实验数据与表达式计算结果比较吻合,证明表达式可以用于压电发电器的性能预测。通过对输出参数表达式进行深入讨论,得出压电发电器的一般特性和相关参数与发电器性能参数之间的关系,可指导压电发电器的优化设计。

Study on analytical model for piezoelectric generator

An approach to calculate the output parameters of mechanical excited piezoelectric element is described.Through this approach,the analytical expression of output current,voltage,power for two type piezoelectric generators is derived,and also the analytical expression for the optimal power flow from these piezoelectric generators is derived.Some experiments validate the approach.By analyzing the expressions,some characteristics of the piezoelectric generator is obtained and also the effect of related parameters on the piezoelectric generator is obtained,all of which can be used as the basis for the generator design optimization.