Model-free control of nonlinear power converters

Abstract

A new "model-free" control methodology is applied to a boost power converter. The properties of the boost converter allow to evaluate the performances of the model-free strategy in the case of switching nonlinear transfer functions, regarding load variations. Our approach, which utilizes "intelligent" PI controllers, does not require any converter model identification while ensuring the stability and the robustness of the controlled system. Simulation results show that, with a simple control structure, the proposed control method is almost insensitive to fluctuations and large load variations.