High power density impedance control network DC DC converter utilizing an integrated magnetic structure
This paper introduces a high power density high efficiency isolated dc dc converter based on the impedance control network (ICN) resonant converter architecture. The ICN converter maintains very high efficiency by achieving zero voltage switching (ZVS) and near zero current switching (ZCS) across a wide range of input voltages, output voltages and output power. High power density is achieved by combining the three inductors of the ICN converter into a single integrated magnetic structure with two coupled windings. Power losses in this integrated magnetic structure are minimized using a finite element analysis (FEA) based design optimization approach. A prototype 550 W, 1 MHz ICN converter incorporating the integrated magnetic structure, designed to operate over an input voltage range of 36 V to 60 V and an output voltage range of 34 V to 55 V is built and tested. The prototyped ICN converter achieves a power density of 462 W/in3, a peak efficiency of 96.7% and maintains efficiencies above 94.8% across its entire operating range.
2016 IEEE Energy Conversion Congress and Exposition (ECCE)