Cooling arrangement of an electrical machine
A component of an electric machine 46 , the component comprising a core 10 ; two or more teeth 14 extending radially therefrom; at least one electromagnetic winding 12 , each winding 12 around at least one of the teeth 14 ; wherein the core 10 having a cooling arrangement including at least one cooling insert 48 located between adjacent windings 12 and whereby in use a cooling fluid being arranged to flow through the at least one cooling insert 48 to facilitate heat transfer and dissipation from the electromagnetic windings 12 . The cooling inserts providing improved cooling, structural support to the windings, and electrical insulation between the windings and the core.
1. A component of an electric machine, the component comprising:
a core;
two or more teeth extending radially from the core;
at least one electromagnetic winding, each winding being arranged around at least one of the teeth; wherein
the core has a cooling arrangement comprising at least one cooling insert being bonded to the core and located between adjacent windings, the at least one cooling insert defining a cooling fluid flow duct, the at least one cooling insert including only a single material with high thermal conductivity and low electrical conductivity; and
a cooling fluid is arranged to flow through the at least one cooling insert to facilitate heat transfer and dissipation from the electromagnetic windings.
2. A component as claimed in claim 1 wherein the at least one cooling insert is located between circumferentially adjacent windings.
3. A component as claimed in claim 1 wherein the at least one cooling insert is located between radially adjacent windings.
4. A component of an electric machine, the component comprising:
a core;
two or more teeth extending radially from the core;
at least one electromagnetic winding, each winding being arranged around at least one of the teeth; wherein
the core has a cooling arrangement comprising at least one cooling insert located between circumferentially adjacent windings, the at least one cooling insert defining a cooling fluid flow duct, the at least one cooling insert including only a single material with high thermal conductivity and low electrical conductivity; and
a cooling fluid is arranged to flow through the at least one cooling insert to facilitate heat transfer and dissipation from the electromagnetic windings.
5. A component as claimed in claim 4 wherein there is an annular array of teeth.
6. A component as claimed in claim 4 wherein there is at least one annular array of cooling inserts.
7. A component as claimed in claim 4 wherein the at least one cooling insert comprises a ceramic.
8. A component as claimed in claim 4 wherein the at least one cooling insert is a casting.
9. A component as claimed in claim 4 wherein the at least one cooling insert comprises aluminium nitride.
10. A component as claimed in claim 4 wherein the at least one cooling insert comprises silicon carbide.
11. A component as claimed in claim 4 wherein the at least one cooling insert is generally tapering in cross section.
12. A component as claimed in claim 4 wherein the at least one cooling insert is bonded to the windings.
13. A component as claimed in claim 4 wherein the at least one cooling insert is hollow and the cooling fluid flow duct is arranged for a flow of cooling fluid.
14. A component as claimed in claim 4 wherein the at least one cooling insert is porous to allow a flow of cooling fluid therethrough.
15. A component as claimed in claim 4 wherein each of the teeth has a winding around it.
16. A component as claimed in claim 4 wherein at least two cooling inserts are in fluid communication with a cooling fluid inlet manifold to provide a constant flow of cooling fluid to the at least two cooling inserts.
17. A component as claimed in claim 4 wherein at least two cooling inserts are in fluid communication with a cooling fluid outlet manifold to facilitate heat dissipation from the at least two cooling inserts.
18. A component as claimed in claim 4 wherein a metering arrangement is provided upstream of the at least one cooling insert to optimise the flow rate of cooling fluid for a given running condition.
19. A component as claimed in claim 4 further comprising an air source that supplies the cooling fluid.
20. A component as claimed in claim 19 wherein the air source is a bypass duct or a compressor of a gas turbine engine.
21. A component as claimed in claim 4 wherein the component is a stator component of an electric machine.
22. A component as claimed in claim 4 wherein the component is a rotor component of an electric machine.
23. An electric machine comprising the component as claimed in claim 4 .
24. A component of an electric machine, the component comprising:
a core;
two or more teeth extending radially from the core;
at least one electromagnetic winding, each winding being arranged around at least one of the teeth; wherein
the core has a cooling arrangement comprising at least one cooling insert located between radially adjacent windings, the at least one cooling insert defining a cooling fluid flow duct, the at least one cooling insert including only a single material with high thermal conductivity and low electrical conductivity; and
a cooling fluid is arranged to flow through the at least one cooling insert to facilitate heat transfer and dissipation from the electromagnetic windings.
25. A component as claimed in claim 24 wherein there is an annular array of teeth.
26. A component as claimed in claim 24 wherein there is at least one annular array of cooling inserts.
27. A component as claimed in claim 24 wherein the at least one cooling insert comprises a ceramic.
28. A component as claimed in claim 24 wherein the at least one cooling insert is a casting.
29. A component as claimed in claim 24 wherein the at least one cooling insert comprises aluminium nitride.
30. A component as claimed in claim 24 wherein the at least one cooling insert comprises silicon carbide.
31. A component as claimed in claim 24 wherein the at least one cooling insert is generally tapering in cross section.
32. A component as claimed in claim 24 wherein the at least one cooling insert is bonded to the windings.
33. A component as claimed in claim 24 wherein the at least one cooling insert is hollow and the cooling fluid flow duct is arranged for a flow of cooling fluid.
34. A component as claimed in claim 24 wherein the at least one cooling insert is porous to allow a flow of cooling fluid therethrough.
35. A component as claimed in claim 24 wherein each of the teeth has a winding around it.
36. A component as claimed in claim 24 wherein at least two cooling inserts are in fluid communication with a cooling fluid inlet manifold to provide a constant flow of cooling fluid to the at least two cooling inserts.
37. A component as claimed in claim 24 wherein at least two cooling inserts are in fluid communication with a cooling fluid outlet manifold to facilitate heat dissipation from the at least two cooling inserts.
38. A component as claimed in claim 24 wherein a metering arrangement is provided upstream of the at least one cooling insert to optimise the flow rate of cooling fluid for a given running condition.
39. A component as claimed in claim 24 further comprising an air source that supplies the cooling fluid.
40. A component as claimed in claim 39 wherein the air source is a bypass duct or a compressor of a gas turbine engine.
41. A component as claimed in claim 24 wherein the component is a stator component of an electric machine.
42. A component as claimed in claim 24 wherein the component is a rotor component of an electric machine.
43. An electric machine comprising the component as claimed in claim 24 .