Simplified Model and Control Strategy of a High Voltage Gain Interleaved DC-DC Boost Converter

This paper presents a methodology for modeling and control designing of a non-isolated Interleaved DC-DC Boost Converter based on the Three-State Switching Cell (3SSC). This topology is suitable for applications that requires a high input-to-output voltage ratio conversion. The plant modeling is done so as to achieve a Boost converter equivalent model that closely matches the phases dynamic behavior of the original converter. Control strategy adopted is the averaged current mode control with four inner current loops, one for each phase of the MIPTs (Multi-Interphase Transformers), and an outer voltage loop. Simulation results are presented in order to validate the proposed model and control strategy.