Electrically Driven Engine Controls and Accessories for Future Aircraft

Electric motor drives rcprcsent a new method of performing engine control and accessory functions. This paper addresses the application of electrically driven accessories to aircraft engines. Thc replaced hydromechanical engine functions addressed include engine starting and generating, fuel pumping, lube oil pumping, variable geometry actuation, and inlet particle separation. An engine-mounted switched reluctance starter/generator system will be discussed with some advantages and disadvantages of externally-mounted and internally-mounted starter/generator machines. Control and frequency response requirements for a motor driven fuel metering pump arc included as well as a conceptual aircraft electric power system with some potential benefits of'a more electric aircraft.