Tunable Textured Composites for Lightweight Power Systems

Based upon the successful completion of the Phase I program, the Phase II program aims to continue to development of the voltage tunable inductors (VTIs). The program will improve the Phase I textured magnetics approach and develop models that accurately describe the relationship between the material properties, tunability, and geometry. From these results, optimized VTIs will be manufactured and fully characterized including initial mil-spec thermal evaluation. The new Phase II devices will build upon the results of the Phase I program and continue to improve their operation and lower the required tuning drive voltage. The Phase II device will then be implemented in Army relevant applications such as those of soldier power management and solar voltaic implementations. These applications include high frequency dc-dc converters and maximum power point tracking converters which aim to utilize the inductance tunability to improve system operation and efficiency. Further building upon the Phase I, a new VTI drive circuit and approach will be developed and used in the application examples. The Phase II program will complete with a fully demonstrable system with integrated VTI that is relevant to current Army requirements and needs.