Analysis, modeling and robust controller design for a series resonant converter

Modeling, analysis and controller design of a series resonant converter is presented in this paper. In the field of power electronics, the load variation and unregulated input voltage perturbation have not been taken into consideration when a controller is designed. In this paper, the perturbation of the unregulated input voltage is treated as an exogenous disturbance and the load variation as a structured uncertainty of the plant, respectively. Then an averaged model, which includes disturbance and model uncertainty, of the series resonant converter is derived. After constructing the model, a classical controller and a robust controller have been designed. The μ-synthesis technique is applied for a robust controller design to achieve the requirement of robust stability and robust performance