Investigation of Power Losses and Possible Solutions for Frequency Control in Multiphase Interleaved DC-DC Boost Converters

In the realm of power electronics, ensuring the efficiency of DC-DC converters is paramount. This study focuses on optimizing efficiency through switching frequency in multiphase interleaved DC-DC converters. It presents an in-depth analysis of power losses, emphasizing frequency-dependent variations and capacitor losses at both input and output. Experimental results using a three-phase interleaved boost converter highlight the influence of switching frequency and phase-shift on efficiency. The study also explores the feasibility of real-time switching frequency correction, suggesting it may not always be beneficial due to potential increases in voltage and current ripple and energy imbalances. This research provides valuable insights and practical recommendations for improving the design and operation of these converters.