基于虚拟仪器的容性、阻性电流信号分解技术

为研究非线性电介质介电性能测试的泄漏电流分解并且推导电导率和极化率与电场强度的关系,提出了采用非线性最小二乘拟合算法的分解技术,依据非线性最小二乘理论,采用阻尼最小二乘算法,给出了仿真系统的原理框图。通过Labview仿真分析证明了该方法能有效地分解容性和阻性电流,易于软件实现,为非线性电介质介电性能测试技术奠定了理论基础。

The Capacitive Current and Resistive Current Decomposition Technology Using Nonlinear Least Squares Method

To measure the resistive current and the capacitive current respectively and get the relations between conductivity or polarization and electric field, a decomposition method on the basis of nonlinear least squares method is presented. According to the theory of nonlinear least fitting, the Levenberg-Marquardt method is used and the simulation system diagram is given. The Labview simulation shows that this method can effectively decompose the capacitive current and the resistive current, moreover it can be achieved easily with software and the algorithm is very useful to the measurement technology of nonlinear dielectric properties theory.