Abstract

The averaged model of non-ideal Boost converter operating in discontinuous mode (DCM) circuit was studied based on the switching elements model, the equivalent circuit method, and the energy conservation law, in which the duty ratio constraint was introduced to improve the model. The open-loop transfer function was derived to build the small signal model, by adding a voltage-controlled feedback loop, the closed-loop transfer function was also derived. The simulation results showed the correctness of the model at last.

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