Patent ID: 6710498
Filing Date: 2004-03-23
Classification: H02K

Abstract:
A composite squirrel cage rotor, comprising:a rotating shaft; a polymer resin body containing chopped fibers and powder of high magnetic permeability, said powder being uniformly distributed in the polymer resin body; a plurality of squirrel cage conductor bars positioned axially around and embedded in said polymer resin body, said conductor bars being formed of material having high electric conductivity; a plurality of axial slots, wherein said axial slots are formed between said cage squirrel conductor bars; heat pipes inserted into the axial slots for dissipating heat generated in the composite squirrel cage rotor, said heat pipes being sealed and containing isothermal cycling materials therein; and an inner core having high magnetic permeability, said inner core being disposed between said shaft and said polymer resin body for increasing the magnetic flux density of the composite squirrel cage rotor.