Analysis and design of an adaptive parameter estimator for power electronics circuits

This paper presents the analysis and design of an adaptive parameter estimator for power electronics circuits. Adaptive parameter estimation has been demonstrated to be a useful technique for enabling novel controls, monitoring, and fault diagnosis techniques in power electronics systems. We present an analysis of factors that affect the performance, stability, and feasibility of a gradient-type parameter estimation, along with simulation and experimental results that validate the analysis. Moreover, we derive theoretical limits on the convergence speed of the parameter estimation and demonstrate design techniques to maximize this limit while maintaining the robustness of the estimation. The paper provides a comprehensive analysis and design process for adaptive estimation schemes as applied to systems of switching power converters.