Device and method for cooling electric device having modular stators

An annular stator assembly, comprising:

• a plurality of stator segments, each stator segment comprising:
• a core comprising a plurality of laminates having high magnetic permeability and a plurality of thermally conductive laminates positioned between the permeable laminates;
• and
• a cooling pipe integrated into the laminates for transferring thermal energy from the laminates to a coolant flowing through the cooling pipe.

A method of forming an annular stator assembly, comprising:

• providing a plurality of stator segments, each having a lamination stack comprising plurality of laminates having high magnetic permeability and a plurality of thermally conductive laminates positioned between the permeable laminates and a cooling pipe integrated into the laminates for transferring thermal energy from the laminates to the cooling pipe;
• attaching an end cap to an end of each stator segment;
• winding one or more coils directly onto small portions of a complete stator, and later assembled;
• and
• assembling the stator segments into a ring to form a stator.