MOTOR FOR HIGH TEMPERATURE APPLICATIONS

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A motor for high temperature applications has a stator that carries windings and a rotor that carries magnets. The rotor and the stator are built up from a stack of laminations made of a high temperature rare-earth permanent magnetic alloy. The stator windings are made of a high temperature magnet wire insulated with a vitreous enamel film bonded to the magnet wire. The stator windings are bonded together with an electrically resistant adhesive made of a ceramic binder. Preferably, the stator and rotor laminations are made of an iron-cobalt-vanadium permanent magnetic alloy selected to have high magnetic saturation, high D.C. maximum permeability, low D.C. coercive force, and low A.C. core loss. In a preferred embodiment, these components are integrated in a switched reluctance motor (SRM) that can operate at at least 460° C. for long durations. The same materials and construction can be used to make a resolver that will perform at the same high temperature as the SRM and with the addition of high temperature compatible magnets, a brushless DC and other permanent magnet motor types can also be realized.