コンバータ回路の周波数特性解析法の検討

概要

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It is necessary for a converter design to consider its frequency characteristics which determine its control and system stabilities. The frequency characteristics of input impedances and/or output impedances are indispensable to analyze stabilities of the system according to the Nyquist or the Middlebrook criterion. However, It is practically impossible to calculate frequency characteristics analytically except for limited cases because converter behaviors are basically nonlinear due to switching operations. A new numerical processing method which is based on the perturbation method by a simulator is proposed. The proposed method is applied to the buck, boost, buck-boost, Cuk, converters for their input frequency analyses. The results are compared and coincided well with measured characteristics. The proposed method is validated.
2013-07-00