Simplified Modelling of a Three-Phase Interleaved Buck Converter for State Feedback Control

Interleaved DC-DC converters are widely used in applications requiring low current ripple, such as onboard power systems in electric transportation. Such applications have to successfully deal with input voltage variation and sudden load changes. These challenges necessitate the use of advanced control schemes, to control DC-DC converters effectively. However, the high-order nature of the interleaved converter model complicates the control design, especially for model-based control methods. This paper proposes a simplified model of a 3-phase interleaved buck converter for the implementation of state feedback control, enabling a simple and practical design. It validates the proposed model and the proposed control method by detailed simulation results.