New materials for transformer-rectifier unit in high-temperature aircraft

AIRCRAFT operating at multi-Mach speeds and high altitudes subject some portions of the electric systems to severe environmental changes. A program is underway to develop a suitable system including an a-c generator with constant-speed drive, a contactor, a circuit breaker, a current transformer, and a transformer-rectifier unit for conversion to direct current. Development and selection of materials for use in the transformer-rectifier are covered in this paper.