Integrated Drive Generators (IDG) provide an elegant solution for supplying constant frequency AC electrical power to the aircraft, which can simplify the design of the complete electrical system. The IDG makes use of a highly reliable continuously variable transmission - the constant speed drive - which converts the variable input speed provided by an aircraft's engine into a constant output speed for the IDG's integral AC generator. This integration of drive and generator provides a proven and reliable solution for constant frequency electrical power.
Since their introduction decades ago, UTC Aerospace Systems’ IDGs have flown for millions of flight hours every year. Over time, this extensive amount of in-service performance data has been used by engineers to improve the reliability, maintainability, and safety of the IDG. Today, the IDG is used by all of the major OEMs and is found on nearly all commercial and military applications. The IDG is the world standard for constant frequency power.