Effect of operating frequency on missile alternators

THE EXTENSIVE USE of 400-cps power systems in manned military aircraft and the consequent availability of standard 400-cps generation, conversion, and utilization components has caused this frequency to be used in most U. S. guided missiles. However, as higher missile flight speeds, longer ranges, and greater accelerations are needed to achieve successful guided-missile missions, the adoption of all measures that reduce the weight and volume of the electric power system without impairing reliability and logistics must be considered. Use of a power frequency higher than 400 cps would permit substantial reductions in the weight and volume of most missile electromagnetic components and of the prime energy source. However, the determination of an optimum missile power frequency must include a coordinated study of the generation, conversion, transmission, and utilization of electric power in missiles. This study shows that higher power frequencies are compatible with missile utilization components and that the weight of signal transformers and magnetic amplifiers may be decreased substantially.