MOTOR STATOR HAVING CHANNELS USED FOR COOLING AND METHOD OF PROVIDING THE CHANNELS

• US 20120242176A1
• Filed: 03/22/2011
• Published: 09/27/2012
• Est. Priority Date: 03/22/2011
• Status: Active Grant

• Current Assignee: Hamilton Sundstrand Corporation (Rtx Corporation)
• Original Assignee: Hamilton Sundstrand Corporation (Rtx Corporation)
• Inventors: Pal, Debabrata
• Granted Patent: US 9,729,020 B2
• Time in Patent Office: Days
• US Class Current: 310/43
• CPC Class Codes: H02K 1/20 with channels or ducts for flow of cooling medium
• CPC Class Codes: H02K 3/24 with channels or ducts for cooling medium between the conductors
• CPC Class Codes: H02K 7/14 Structural association with mechanical loads, e.g. with hand-held machine tools or fans with fan or impeller for cooling the machine H02K9/06
• CPC Class Codes: Y10T 29/49009 Dynamoelectric machine

Abstract

An example stator assembly includes a stator for establishing a core side of a channel. A plurality of stator windings are secured relative to portions of the stator core. The plurality of stator windings establish a winding side of the channel. At least a portion of the channel is configured to communicate a cooling fluid from a first axial end of the stator core to an opposing axial end of the stator core.

Claims

1. A stator assembly, comprising:

a stator core establishing a core side of a channel; and

a plurality of stator windings secured relative to portions of the stator core, the plurality of stator windings establishing a winding side of the channel, wherein at least a portion of the channel is configured to communicate a cooling fluid from a first axial end of the stator core to an opposing, second axial end of the stator core.

2. The stator assembly of claim 1, wherein the channel is established exclusively by the stator core and the windings.

3. The stator assembly of claim 1, wherein the stator core comprises a plurality of radially extending teeth, and one of the plurality of radially extending teeth is configured to establish the core side.

4. The stator assembly of claim 3, wherein another side of the one of the plurality of radially extending teeth establishes a second core side of a second channel.

5. The stator assembly of claim 1, wherein the stator core comprises a plurality of radially extending teeth, each of the teeth establishing at least one core side for a channel.

6. The stator assembly of claim 1, including a plurality of channels distributed circumferentially about the stator assembly.

7. The stator assembly of claim 1, including a shell positioned within the channel.

8. The stator assembly of claim 7, including a layer of Nomex positioned between the shell and the winding side of the channel.

9. The stator assembly of claim 7, wherein the shell comprises Nomex.

10. The stator assembly of claim 7, wherein the shell comprises at least one circumferentially extending fin.

11. The stator assembly of claim 7, including a spacer housed within the shell.

12. An aircraft motor assembly, comprising:

a rotor having a rotational axis;

a stator core having an array of teeth that extending radially relative to the rotational axis; and

a plurality of stator windings secured relative to the teeth of the array, wherein a plurality of cooling channels are established between the teeth and the plurality of stator windings, the cooling channels distributed circumferentially about the axis.

13. The aircraft motor assembly of claim 12, wherein the motor is a permanent magnet motor.

14. The aircraft motor assembly of claim 12, including a plurality of shells positioned between the teeth and the plurality of stator windings, the plurality of shells each establishing one of the plurality of cooling channels.

15. The aircraft motor assembly of claim 12, wherein the shells comprise fins.

16. The aircraft motor assembly of claim 12, wherein the cooling channels receive coolant from a first end winding portion of the plurality of stator windings and communicate the coolant to an opposing, second end winding portion of the plurality of stator windings.

17. A method of providing a stator cooling channel, comprising:

a) securing a spacer relative to a tooth of a stator;

b) winding a plurality of windings about the spacer and the tooth; and

c) removing the spacer after the winding.

18. The method of claim 17, including impregnating the plurality of windings before the removing.

19. The method of claim 17, including holding the spacer in a shell, the shell configured to remain after the removing.