Influence of Spurious Modes on the Efficiency of Piezoelectric Transformers: A Sensitivity Analysis
Influence of Spurious Modes on the Efficiency of Piezoelectric Transformers: A Sensitivity Analysis
复制标题
DOI：
10.1109/tpel.2020.3001486
复制
发表时间：
2021-01-01
影响因子：
6.7
通讯作者：
Stone, David A.
中科院分区：
文献类型：
--
作者：
Forrester, Jack;Davidson, Jonathan Neil;Stone, David A.
本文分析了压电变压器 (PT) 中杂散模式导致的效率下降。对具有单个谐振支路和两个谐振支路（包括寄生模式）的 PTequivalent 电路模型进行电路分析，从而可以分析寄生模式导致的效率下降。然后进行了多重灵敏度分析，强调了杂散谐振电路的频率差（模式之间）和特性阻抗（根 L-2/C-2）是最大限度地减少杂散模式导致的效率下降的关键设计参数。进一步分析这两个参数以确定最佳设计条件，以确保最小的效率下降。该分析的结果提供了一种估计杂散模式是否会降低效率的方法，从而提供了一种改进 PT 设计的方法。
An analysis of the efficiency degradation resulting from spurious modes in piezoelectric transformers (PTs) is presented in this article. Circuit analysis is performed on PTequivalent circuit models with both a single resonant branch and with two resonant branches (spurious mode included), allowing the efficiency degradation from a spurious mode to be analyzed. Multiple sensitivity analyses were then performed, highlighting frequency difference (between modes) and characteristic impedance of the spurious resonant circuit (root L-2/C-2) as critical design parameters for minimizing efficiency degradation from spurious modes. These two parameters are further analyzed to determine optimum design conditions to ensureminimal efficiency degradation. Results of this analysis provide a method of estimating whether a spurious mode will degrade efficiency and consequently provide a method for improving PT designs.