Rotor Electromagnetically Coupled with Stator

摘要

An apparatus in an example comprises a stator and a rotor. The stator comprises one or more coils. At least one coil of the one or more coils comprises one or more windings about a hollow spool. The hollow spool comprises a stator conveyor. The stator conveyer comprises a coolant that is located on an inner surface of the hollow spool. The rotor is electromagnetically coupled with the stator. The rotor comprises a plurality of permanent magnets.