Feedback Linearization Control and Current Control Mode for Boost Converter

Linear control techniques have proven effective in controlling DC/DC converters, such as the Boost converter. This approach relies on averaged small signal models and can be implemented using either voltage mode control or current mode control structures. However, linear controllers are often greatly affected by changes in load and model parameters because they are designed based on a small signal model that is established by the linearization method. Consequently, to control DC/DC converters, it is required to study nonlinear control strategies.Feedback linearization control is one of the popular nonlinear control techniques and it has been widely used in the field of power electronics control. This paper suggests a technique for designing a current mode control structure for a boost converter. The internal current loop controller is designed using the feedback linearization control method, and the voltage outer loop controller is designed using the affine parameterization approach. The simulation results on Matlab/Simulink show that the boost converter in the current control mode using the proposed design technique has a good dynamic response and is less affected by fluctuations in the load and parameters model.