An insulation solution for coils of high temperature motors (500°C)

Abstract

The paper deals with the general choices made for designing and testing the prototype of a coil able to fulfill the functions required by a Permanent Magnet Synchronous Machine able to work permanently at high internal temperatures, up to 500°C. The specific physical problems are listed and analyzed. The main challenge consists in defining High Temperature (HT°) inorganic coils built without any polymer. The proposed coils are based on a wire insulated by a thin ceramic coating protected by a HT° cement, which gives the appropriate mechanical properties up to 500°C. The deterministic arrangement of the turns compensates weak electrical properties of the turn-to-turn insulation.