Stator assembly cooling method

1 . A stator core, comprising:

laminations disposed in a laminated arrangement to form a stator core body having an axial length extending in a lamination dimension, the stator core body comprising:

an annular portion extending along the axial length;

teeth extending radially from the annular portion and along the axial length, each tooth being formed to define one or more holes running along the axial length; and

fins extending circumferentially across each of the one or more holes,

wherein:

wherein each fin is segmented along the axial length into fin sections, and

each fin section of each fin has a concave surface facing in a direction of the axial length and facing incoming coolant flow.

2 . The stator core according to claim 1 , wherein each fin extends across an entirety of the corresponding hole.

3 . The stator core according to claim 1 , wherein each fin is split at a mid-point thereof.

4 . The stator core according to claim 3 , wherein each fin is offset from an opposite fin.

5 . The stator core according to claim 1 , further comprising one or more turbulators disposed on one or more fin.

6 . The stator core according to claim 1 , wherein each fin extends continuously along the axial length.

7 . The stator core according to claim 1 , wherein the fin sections of each segmented fin are aligned with one another along the direction of the axial length.

8 . The stator core according to claim 7 , wherein each fin section of each fin has a flat surface and the concave surface, the flat surface and the concave surface facing opposite one another in the direction of the axial length.

9 . A stator core, comprising:

laminations disposed in a laminated arrangement to form a stator core body having an axial length extending in a lamination dimension, the stator core body comprising:

an annular ring portion extending along the axial length;

teeth extending radially inwardly from the annular ring portion and along the axial length, each tooth being formed to define one or more holes running along the axial length; and

fins extending circumferentially across each of the one or more holes,

wherein:

the windings are wound around each tooth,

each one of the one or more holes extends radially along neighboring windings from an inboard radial terminus to an outboard radial terminus, which is radially outboard of a radially outermost one of the neighboring windings, and,

for each hole of the one or more holes, a radially outermost fin is disposed radially outboard of the radially outermost one of the neighboring windings and radially inboard of the outboard radial terminus.

10 . The stator core according to claim 9 , wherein each fin extends across an entirety of the corresponding hole.

11 . The stator core according to claim 9 , wherein each fin is split at a mid-point thereof.

12 . The stator core according to claim 11 , wherein each fin is offset from an opposite fin.

13 . The stator core according to claim 9 , further comprising one or more turbulators disposed on one or more fin.

14 . The stator core according to claim 9 , wherein each fin extends continuously along the axial length.

15 . The stator core according to claim 9 , wherein each fin is segmented along the axial length into fin sections aligned with one another along a direction of the axial length.

16 . The stator core according to claim 15 , wherein each fin section of each fin has a flat surface and a concave surface, the flat surface and the concave surface facing opposite one another in the direction of the axial length and the concave surface facing incoming coolant flow in the direction of the axial length.

17 . A motor, comprising:

laminations disposed in a laminated arrangement to form a stator core body having an axial length extending in a lamination dimension, the stator core body comprising:

an annular ring portion extending along the axial length;

teeth extending radially inwardly from the annular ring portion and along the axial length, each tooth being formed to define one or more holes running along the axial length; and

fins extending circumferentially across each of the one or more holes,

the motor further comprising:

windings wound around the teeth; and

a rotor, which is drivable to rotate about a longitudinal axis thereof by current being applied to the windings,

wherein:

each one of the one or more holes extends radially along neighboring windings from an inboard radial terminus to an outboard radial terminus, which is radially outboard of a radially outermost one of the neighboring windings, and,

for each hole of the one or more holes, a radially outermost fin is disposed radially outboard of the radially outermost one of the neighboring windings and radially inboard of the outboard radial terminus.

18 . The motor according to claim 17 , wherein the laminations comprise iron.

19 . The motor according to claim 17 , wherein the one or more holes are receptive of a cooling air flow whereby the cooling air flow thermally interacts with the fins.

20 . The motor according to claim 17 , wherein one of:

the annular portion is an annular ring portion, the teeth extend radially inwardly from an inner diameter of the annular ring portion and the rotor is rotatable within the stator core body, and

the annular portion is an annular cylinder portion, the teeth extend radially outwardly from an outer diameter of the annular cylinder portion and the rotor is rotatable about the stator core body.