非接触式电能传输系统中疏松耦合变压器电感参数的计算分析

摘要

Loosely coupled transformer inductance in inductively coupled power transfer system is studied, and a loosely coupled transformer model is built. By solving the finite element magnetic field equation, the inductance is computed using the energy method and incremental energy method. Meanwhile, the experiment is designed to obtain the self inductance and mutual inductance of loosely coupled transformer with air gap of different width. Based on the energy method and incremental energy method, the inductance is calculated and compared with experimental results, and the accuracy and reasonability of the methods are discussed. The impact of nonlinear excitation on loosely coupled transformer under different width of air gap is studied. The error and applicability of different methods to calculate the inductance is inspected.Effective method of calculating the inductance is found through the analysis, which lays a foundation for further research on excitation characteristics of loosely coupled transformer.%研究了非接触式电能传输系统中疏松耦合变压器的电感参数。建立了一种疏松耦合变压器模型，通过求解有限元磁场方程，采用能量增量法和能量法计算电感参数；同时，利用实验的方法获取不同气隙下疏松耦合变压器的自感和互感。通过将计算结果与实验数据对比，分析基于能量增量法和能量法计算电感的准确性和合理性。在不同气隙宽度下，研究疏松耦合变压器励磁非线性受到的影响，考察不同方法计算电感参数的误差和适用性，通过分析得到计算电感参数的有效方法，为进一步开展疏松耦合变压器励磁特性研究奠定基础。