Cryogenic Electrical Machines

Lightweight cryogenic generators, made with advanced high temperature conductors will be needed to meet the demands for lightweight multi-megawatt electrical power in emerging high power airborne weapon systems. This program extends the HTS work done inprevious programs, and will build and test a one-megawatt HTS generator using novel design concepts that will provide a full size high speed HTS generator suitable for emerging airborne weapon systems. The generator is designed to serve as a fullyfunctional megawatt-class generator for early groundbased power system demonstrators. Additionally, the simplicity and low cost of this design allow it to function as a long term test facility with which new HTS conductors, cryogenic cooing systems andgenerator components can be easily (and inexpensively) retrofitted and tested under realistic operating conditions. This HTS generator is designed with easily replaceable rotor coil modules and is designed for easy substitution of complete statorwindings; allowing the generator to produce a variety of output voltages, required by different airborne systems.This program will develop and test a low cost, high power, superconducting generator has been simplified to reduce the cost and increase thereliability of these machines. Immediate application will be for high power military systems, but the design principles developed in this program will make their way into commercial application, facilitated by the availability of the fully functionalgenerator test facility developed in this program.