Very high temperature stator construction
A stator has a field winding, the winding comprising a plurality of axial conductors connected at their ends to form at least one circuit with a number of turns. Each axial conductor is disposed within a tubular axial insulation member, the tubular axial insulation members being disposed within a stack of laminations. The axial conductors and the tubular insulation members are radially distributed at equal angles. The position of the axial conductors and the tubular insulation members is predetermined.
1. A stator having a field winding, the winding comprising a plurality of axial conductors connected at their ends to form at least one circuit with a number of turns, each axial conductor being disposed within a tubular axial insulation member, the tubular axial insulation members being disposed within and running the full length of a stack of laminations, the axial conductors being joined in pairs by a connection at their ends to form at least one circuit with a number of turns, the connection between pairs of the axial conductors being provided by a plurality of wafers formed of insulating material, each wafer having a passage for a conductor path provided to connect one or more pairs of axial conductors.
2. A stator according to claim 1 wherein the axial conductors and the tubular insulation members are radially distributed at equal angles.
3. A stator according to claim 1 wherein the position of the axial conductors and the tubular insulation members is predetermined.
4. A stator according to claim 1 wherein the axial conductors are arranged in more than one power phase, each conductor of each phase are separated by at least 1mm of geometric distance at an end turn region.
5. A stator according to claim 1 wherein the axial conductors and the tubular insulation members are arranged in concentric circles.
6. A stator according to claim 1 wherein a through bore is provided along the central axis.
7. A stator according to claim 1 wherein the axial conductors being joined in pairs by a connection at their ends to form at least one circuit with a number of turns, the connection between pairs of the axial conductors being provided by shaped conductor members, with potting material being provided around the shaped conductor members.
8. A stator according to claim 1 wherein the axial conductors and end turns are formed from a continuous conductor threaded through the stator.
9. A stator according to claim 1 wherein the axial conductors and end turns are welded together.
10. A stator according to claim 1 wherein the axial conductors and/or end turns are braided wire.
11. A stator according to claim 1 wherein the axial conductors and/or conductive end turn paths are copper clad steel.
12. A stator having a field winding, the winding comprising a plurality of axial conductors connected at their ends to form at least one circuit with a number of turns, the axial conductors being joined in pairs by a connection at their ends to form at least one circuit with a number of turns, the connection between pairs of the axial conductors being provided by a plurality of wafers formed of insulating material, each wafer having end turns provided to connect one or more pairs of axial conductors.
13. A stator according to claim 12 wherein the axial conductors and end turns are formed from a continuous conductor threaded through the stator.
14. A stator according to claim 12 wherein each wafer includes an arcuate channel to accommodate the end turns.
15. A stator according to claim 12 wherein the conductive path is provided by a rigid arcuate conductor.
16. A stator according to claim 12 wherein the axial conductors and conductive end turn paths are welded together.
17. A stator according to claim 12 wherein the axial conductors and/or conductive end turn paths are braided wire.
18. A stator according to claim 12 wherein the axial conductors and/or conductive end turn paths are copper clad steel.
19. A stator having a field winding, the winding comprising a plurality of axial conductors connected at their ends to form at least one circuit with a number of turns, the axial conductors being joined in pairs by a connection at their ends to form at least one circuit with a number of turns, the connection between pairs of the axial conductors being provided by shaped conductor members, with potting material being provided around the shaped conductor members.