Electric machine
A stator core is provided that can define a plurality of core slots in a surface thereof. The core slots can extend between a first and a second end portion of the stator core. A winding can be housed in the core slots. The winding can define a channel through at least a portion thereof. A cooling system can be operably coupled with the channel and can be configured to move a cooling fluid through the channel. A turbulator can be positioned within the channel. The turbulator can be within a flowpath of the cooling fluid and can be integrally formed with the winding.
1. An electric machine comprising:
a stator core defining a plurality of core slots in a surface thereof;
a winding housed in at least one of the plurality of core slots, the winding defining a channel through at least a portion thereof;
a cooling system operably coupled with the channel and configured to move a cooling fluid through the channel; and
a turbulator positioned within the channel, wherein the turbulator is within a flowpath of the cooling fluid,
wherein the turbulator includes a plurality of turbulators, the plurality of turbulators including a first pair of rows arranged on a linear portion of the winding separated by a first length generally along a cooling fluid flowpath direction and a second pair of rows arranged on a curved portion of the winding separated by a second length generally along the cooling fluid flowpath direction, wherein the first and second lengths are equal.
2. The electric machine of claim 1 , further comprising:
a controller operably coupled to the cooling system and configured to actuate a pump assembly of the cooling system.
3. The electric machine of claim 1 , wherein the turbulator includes a first turbulator separated from a first side portion of the channel by a first distance and a second turbulator separated from an opposing second side portion of the channel by a second distance.
4. The electric machine of claim 3 , wherein the first distance is generally equal to the second distance.
5. The electric machine of claim 3 , wherein the turbulator is integrally formed with the winding.
6. The electric machine of claim 1 , wherein the turbulator includes a first turbulator having a first width and a second turbulator having a second width.
7. The electric machine of claim 6 , wherein the first width is generally equal to the second width.
8. The electric machine of claim 6 , wherein the first width is greater than the second width.
9. The electric machine of claim 1 , wherein the turbulator includes a first section extending from an upper portion of the channel and a second section extending from a bottom portion of the channel, wherein the first and second sections define a gap therebetween.
10. The electric machine of claim 9 , wherein the first and second sections are vertically offset from one another.
11. The electric machine of claim 9 , wherein the gap defined between the first and second sections is asymmetrical relative to a centerline of the channel.
12. The electric machine of claim 1 , wherein the turbulator includes a first section extending from an upper portion of the channel and a second section extending from a bottom portion of the channel, wherein the first and second sections define a gap therebetween.
13. A method of manufacturing an electric machine having a stator core and a rotor, the method comprising:
for the stator core of the electric machine, forming a winding having a channel defined through at least a portion thereof, wherein forming the winding further includes integrally forming first and second turbulators within the channel,
wherein the first turbulator is separated from a first side portion of the channel by a first distance and the second turbulator is separated from an opposing second side portion of the channel by a second distance, the first distance varied from the second distance.
14. The method of claim 13 , further comprising:
operably coupled the winding to one of the stator core or the rotor; and
fluidly coupling a cooling system to the channel, wherein fluidly coupling the cooling system to the channel includes coupling a supply line to one end portion of the winding and a return line to a second end portion of the winding.
15. The method of claim 13 , wherein forming the first and second turbulators within the channel further includes forming at least partially vertically aligned first and second sections of the first and second turbulators, wherein a gap is defined between the first and second sections of the first and second turbulators.
16. A winding for an electric machine comprising:
an elongated body, wherein the elongated body is configured to be operably coupled with at least one of a stator or a rotor;
a channel defined by the elongated body and extending through at least a portion of the elongated body; and
a plurality of turbulators positioned within the channel and including a first pair of rows arranged on a linear portion of the winding separated by a first length generally along a cooling fluid flowpath direction and a second pair of rows arranged on a curved portion of the winding separated by a second length generally along the cooling fluid flowpath direction, wherein the first length and the second length are generally equal.
17. The winding for the electric machine of claim 16 , wherein the channel is operably coupled with a cooling system configured to move a cooling fluid through the channel.
18. The winding for the electric machine of claim 16 , wherein the plurality of turbulators includes a first turbulator and an offset second turbulator.
19. The winding for the electric machine of claim 18 , wherein each of the first and second turbulators includes a first section extending from a first portion of the channel and a second section extending from a second portion of the channel, the first and second portions separated by a gap.