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The problem of model reduction by moment matching for switched power converters described in so-called port controlled Hamiltonian form is addressed and solved using the recently introduced notion of moment for nonlinear systems. The theory is illustrated by means of simulations on a three-phase rectifier with LCL filter.
In this paper a non-linear sampled data model for fourth order DC-DC converters is developed. This model closely depicts the effect of large-signal variation in duty ratio caused due to large-signal disturbances such as load/source transients, which linear small-signal models and other non-linear models generally fails to predict. Large-signal linearization is applied to the exact discrete-time model,...
A unified continuous small-signal modeling method of switching dc-dc converters operating in duty-ratio programmed mode is presented. The method can be considered a new implementation of the widely known state-space averaging approach. Its principal advantage is a reduction of the order of the matrices to be inverted resulting in a significant simplification of the modeling procedure, especially for...
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