Patent attributes
Exemplary embodiments of the present invention relate to an induction motor including a stator having a circular cross-section and an inner passage having a longitudinal axis defining a bore, a solid core steel rotor having a circular cross-section rotatably disposed within the bore of the stator, and an air gap disposed between the rotor and the stator. A copper conductive layer is disposed on the steel rotor to increase the electrical conductance of the rotor. Exemplary embodiments adhere the copper conductive layer to the steel rotor using Hot Isostatic Pressing (HIP). The HIP process encloses the steel rotor and the copper conductive layer in a containment vessel, and adheres the conductive layer to the rotor by applying high temperature and high gas pressure to the outside of the containment vessel.
