A Novel Parameter Estimation Method of S/S Compensated Converter

This paper proposes a novel parameter estimation method for a series-series compensated converter. The estimated parameters include self-inductances of the two coils, the coupling coefficient and mutual inductances between the two coils, and the load voltage. The main feature of this method is that it utilizes the phase information of secondary current, which is obtained in the primary side by adopting a multi-functional integrated contactless transformer (MICT). The coupling coefficient is estimated with four specific frequencies, only requiring the phase detection in primary side. Finally, the experimental results have verified the accuracy of the estimation method. And a closed-loop control is performed based on the estimated results.