A solid rotor A-C generator for high-temperature electrical systems

RELIABILITY has always been the primary requirement for aircraft generating systems. The rapid development of high-performance aircraft has continually demanded greater reliability along with increased operating temperatures. These two conditions are not directly compatible. As temperatures increase the choice of insulations and lubricants is narrowed to a few which, in general, have inherently lower mechanical properties than the conventional lower temperature materials. During high-temperature operation these materials, as well as the electromagnetic materials, suffer additional loss in physical and electrical properties. The desired increase in reliability must be achieved despite these obstacles introduced by the increased temperatures.