Nanocrystalline cored transformer design and implementation for a high current low voltage DC/DC converter

Abstract

Transformers are considered critical components that influence high power converter dynamic response, efficiency, and size. High permeability nanocrystalline cores are being increasingly utilized in designs due to their high saturation flux density, high power density, and lower power loss, for a given volume. This paper presents the design and implementation of a high frequency nanocrystalline cored transformer operating at 14 kHz, and used in a high current low voltage dc-dc converter with a 600 V input, and an 8 V, 1000 A output requirement. Power loss analysis and leakage inductance calculation are derived to evaluate the transformer performance. Simulation and experimental results are also presented to validate the design.