Rotor based air gap heating for air driven turbine

摘要

A generator apparatus comprises a deicing circuit (80). The deicing circuit is operable during a time when a main generator rotor (36) is not being rotated by a generator shaft (34). The deicing circuit includes a first power source (82) for energizing a plurality of exciter field windings (56) with alternating input current to induce an exciter output current in a plurality of exciter armature windings (68). The exciter output current is provided to main generator rotor windings (38) for producing resistance heating around an air gap (44) separating the main generator rotor from a main generator stator.