Patent ID: 6515383
Filing Date: 2003-02-04
Classification: H02K

Abstract:
An electric machine comprising a rotor, a stator and a cooling jacket, the stator comprising an armature, a plurality of stator windings that pass through a plurality of stator slots, producing a plurality of stator winding end-turns at a distal end of the armature and a plurality of stator winding end-turns at a proximal end of the armature, wherein the machine further comprises:a hermetically-sealed chamber surrounding the stator winding end-turns; at least one phase-change internal coolant within the hermetically-sealed chamber, the internal coolant having a liquid phase and a vapor phase; a wicking means comprising the plurality of stator winding end-turns and a wicking matrix disposed between the cooling jacket and said stator winding end-turns to provide wicking action; and means for vapor return.