Power converters regulators are generally designed based on standard models assuming linear the magnetic characteristics of the involved passive components. Since these characteristics are nonlinear, especially in presence of large currents or high temperatures, the proposed regulators are likely not to guarantee the performances they have been designed for. In the present paper, the effect of nonlinear magnetic characteristics on control performances is investigated for certain converters. It is shown that the control performances actually deteriorate if the nonlinear feature of relevant components is not accounted for in the converter model. A solution of such an issue is explicitly developed for two converters.
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