400Hz Frequency Converters:
DESIGNED FOR AIRCRAFT AND WEAPON SYSTEMS
The need for a 400Hz Frequency Converter is based on the power used by aircraft. This means power is needed on the ground, to keep from using the engines on the ground. The 400Hz power was developed by the Edison Company for aircraft requirements. From 1945 - 1970 the only way to get 400Hz power was from a motor generator system. The maximum speed of a 400Hz induction motor is 24,000 RPM, about seven times faster than is possible with a 60Hz motor. This higher speed and the use of higher quality wire makes it possible to produce 400Hz motors with 10 times the power for the same weight and footprint. Today there are both Static (Solid-State) and Rotary (M-G) solutions for 400Hz requirements.