Historically, aerospace power has been 400Hz rather than utility frequencies of 50Hz or 60Hz. Higher power frequencies considerably reduce weight of magnetic components which contributes to fuel savings. As a result, frequency conversion is a key requirement for powering avionics equipment during repair, testing and calibration when only 50 or 60Hz utility power is available in a depot or workshop. Adaptive power has been supplying solid state frequency converters for these and other aerospace applications for many years. With just the right combination of power, features and price, Adaptive power AC frequency converters are widely used as source of power for airborne and shipboard equipment.
Aircraft systems typically require 115Vac L-N single phase or 115 / 208Vac L-L three phase voltage at 400Hz fixed frequency. This approach is known as ‘wild’ frequency and simplifies mechanical complexities of engine powered electrical generators that are now able to allow the frequency to vary with engine speed. Today there are a number of both Aerospace AC and DC power standards which both commercial and military aircraft systems have to comply.