Application of Improved Linear Active Disturbance Rejection Control in LLC Converters for Battery Formation

In order to improve the dynamic response and steady-state characteristics of the output voltage of the LLC resonant converter for battery synthesis, an improved linear active disturbance rejection control (LADRC) method is proposed. Firstly, the forward and reverse voltage gain characteristic curves of the LLC resonant converter are analyzed and a linear self-anti-disturbance controller is designed, secondly. In order to improve the response speed of the system, an improved LADRC controller with variable gain is designed. Finally, by comparing the improved LADRC with the conventional method through numerical simulations under various operating conditions, the results show that the controller proposed in this study has better performance.