参数共振微扰法在Buck变换器混沌反控制中的应用

Applications of Resonant Parametric Perturbation Method in the Chaos Anticontrol for Buck Converter

构造了参数共振微扰作用下的Buck变换器电路模型作为研究对象,通过对扰动幅值及相位进行优化,达到最优的混沌反控制结果。对研制的系统进行了理论分析,构造了迭代映射的模型,通过Jacobian矩阵计算出特征值,特征值轨迹分析的结果与数值仿真是完全一致的。同时,应用该混沌反控制方法还改善了变换器系统的EMI水平,从而为解决开关变换器电磁兼容性问题提供一种新的有效途径。

By constructing a circuit model of Buck converter coupled with the resonant parametric through optimizing the perturbation amplitude and phase to achieve optimal results of anti-control system in theory, constructs the model of the iterative mapping, and calculates eigenvalues through perturbation method, chaos. It analysis the Jacobian matrix. The result of eigenvalues locus is the same as simulation. At the same time, this chaos anti-control strategy can reduce the EMI （electromagnetic interference） level of the converter system, and provides a new and effective way to solve the problem of electromagnetic compatibility switching converter.