SYSTEM AND METHOD FOR COOLING IN ELECTRIC MACHINES

1 . A segmented cooling system for an electric machine comprising:

a plurality of cooling subsystems coupled to respective plurality of separate stator segments coupled together in the electric machine, wherein the plurality of cooling subsystems is configured to direct fluid flow towards one or more regions of interest within the respective plurality of separate stator segments.

2 . The cooling system of claim 1 , wherein the plurality of cooling subsystems comprise at least one baffle.

3 . The cooling system of claim 1 , wherein the plurality of cooling subsystems comprise an impingement nozzle.

4 . The cooling system of claim 3 , wherein the impingement nozzle is configured to direct a flow of the fluid.

5 . The cooling system of claim 1 , wherein the plurality of cooling subsystems comprise a spray nozzle.

6 . The cooling system of claim 1 , wherein the plurality of cooling subsystems comprises one or more axial cooling channels disposed between the respective plurality of separate stator segments.

7 . The cooling system of claim 6 , wherein the cooling channels comprise at least one radial duct configured to guide the fluid flow in a radial direction within each of the respective plurality of separate stator segments.

8 . The cooling system of claim 1 , wherein the fluid comprises one or more compatible coolant fluids, the coolant fluids comprising air and oil.

9 . An electric machine comprising:

a stator comprising:

a plurality of separate stator segments coupled to a respective plurality of cooling subsystems; wherein the plurality of separate stator segments are coupled together to form a cooled stator assembly; wherein the plurality of cooling subsystems is configured to direct fluid flow towards one or more regions of interest within the respective plurality of separate stator segments; and

a rotor comprising a rotor core, the rotor disposed concentrically either inside or outside of the stator.

10 . The electric machine of claim 9 , wherein the plurality of cooling subsystems comprise at least one baffle.

11 . The electric machine of claim 9 , wherein the plurality of cooling subsystems comprise an impingement nozzle.

12 . The electric machine of claim 11 , wherein the impingement nozzle is configured to direct a flow of the fluid.

13 . The electric machine of claim 9 , wherein the plurality of cooling subsystems comprise a spray nozzle.

14 . The electric machine of claim 9 , wherein the plurality of cooling subsystems comprises one or more cooling channels disposed between the respective plurality of separate stator segments.

15 . The electric machine of claim 9 , wherein the cooling channels comprise at least one radial duct configured to guide the fluid flow in a radial direction within each of the respective plurality of separate stator segments.

16 . The electric machine of claim 9 , wherein the fluid comprises air, oil, ethylene glycol, propylene glycol and water.

17 . A method of assembly of an electric machine, the method comprising:

coupling a plurality of segmented cooling subsystems with each of a respective plurality of separate stator segments to form a plurality of separate cooled stator segments;

attaching the plurality of separate cooled stator segments to form a cooled stator assembly of the electric machine; and

attaching the cooled stator assembly to a rotor assembly.

18 . A method for cooling regions of interest in an electric machine, the method comprising:

coupling a plurality of cooling subsystems with respective plurality of separate stator segments in the electric machine; wherein the plurality of separate stator segments are coupled together to form a cooled stator assembly; and

directing fluid flow via the plurality of cooling subsystems towards the regions of interest within the plurality of separate stator segments.