Comparison of State Feedback Control and PI Control for an Interleaved Buck Converter

Demanding applications such as electric transportation require advanced topologies and control schemes for DC-DC converters to improve their performance. This paper compares traditional double-loop PI control and state feedback control with observers (proposed by the authors) applied to a three-phase interleaved buck converter. Detailed design and tuning of both control options are presented. Simulation results included in this paper closely emulate real-time implementation and realistic conditions. They show significant performance advantages of the proposed state feedback control. Deep insight into the performance difference is obtained by converting state feedback control into an equivalent traditional structure.