Abstract
This paper presents the dynamic modelling of a bidirectional active clamp forward converter with synchronous rectifier (ACFC-SR) active cell balancing (ACB) applications. A switching model, an average model, and a small-signal model of the converter with peak current mode control (PCM) are developed. The developed models can be combined with the common ACB control system model such that the overall ACB control system performance can be accessed, such as the stability, the robustness against input voltage disturbances, and the tuning of multi-loop control parameters etc. The model-based design of the control algorithm for the overall ACB control system including both battery cell and power converter can be underpinned by the developed model. The influences of the harmonics and fast dynamics due to the use of power electronics on battery cell performance (e.g. battery ageing) will be further investigated. The transfer functions and bode plots of the converter is presented and the simulation results are carried out to verify the accuracy of models.
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