Hybrid DC-DC converters for automotive and renewable energies systems

Abstract

The wide spread applications of power electronics in global industrialization are challenging the future electrical infrastructure and contributes to non-carbon based electricity production. The power electronic converters can be considered the heart of the renewable energy systems and are responsible for the power generation, transmission/distribution and enduser application. The work presents a research in the field of the DC-DC converters. After a literature research three Hybrid Buck DC-DC converters were studied, simulated, designed, built and integrated in real applications (switchedinductor HBDC-L, switched-capacitor HBDC-C and switched-capacitor/inductor HBDC-C/L). A full analysis and design prototyping of the three Hybrid Buck DC-DC converters is presented in this work. The main current and voltage, simulation and experimental waveforms are presented, discussed and compared. A comparative study of a HBDC-L, a HBDC-C and a HBDC-C/L, in CCM and BCM, with the classical Buck (BDC) and between the hybrid converters is made. A relative price (given in percent), of all the converters, is presented. Laboratory models and full-scale industrial prototypes were built. Two industrial applications for automotive and renewable energy systems are presented. A general description of each experimental setup operating principles is made in order to give a complete image of the presented industrial solutions. Both applications are sustained by experimental results in order to validate the theoretical considerations.