Very high temperature electrical winding
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, or set of axial conductors having a common voltage, is disposed within an insulated channel member, the insulated channel member being disposed within a stack of laminations. The axial conductors and the tubular insulation members are radially distributed at equal angles.
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, or set of axial conductors having a voltage, being threaded within a ceramic tube, the ceramic tube being inserted into a slot provided in a stack of laminations and insulating the axial conductors from the stack of laminations.
2. A stator according to claim 1 wherein the axial conductors and the ceramic tubes are radially distributed at equal angles.
3. A stator according to claim 1 wherein the position of the axial conductors and the ceramic tubes is predetermined.
4. A stator according to claim 1 wherein the axial conductors and the ceramic tubes are arranged in concentric circles.
5. A stator according to claim 1 wherein a through bore is provided along the central axis.
6. A stator according to claim 1 wherein the ceramic tubes are longer than individual laminations.
7. A stator according to claim 1 wherein the ceramic tubes are formed from interlocking axial parts.
8. A stator according to claim 1 wherein the ceramic tubes are U-shaped.
9. A stator according to claim 1 wherein the ceramic tubes are stackable and/or interlocking.
10. A stator according to claim 1 wherein the ceramic tubes are formed from a temperature resistant material.
11. 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 a plurality of discs formed of insulating material, each disc having geometric path provided to connect one or more pairs of axial conductors.
12. 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.
13. A stator according to claim 1 wherein the axial conductors and conductive end turn paths are formed from a continuous conductor threaded through the stator and around end turn discs.
14. A stator according to claim 1 wherein the axial conductors and conductive end turn paths are welded together.
15. A stator according to claim 1 wherein the axial conductors and/or conductive end turn paths are braided wire.
16. A stator according to claim 1 wherein the axial conductors and/or conductive end turn paths are copper clad steel.
17. A stator according to claim 1 wherein the axial conductors are configured into three circuits and employ three phase power.
18. A stator according to claim 1 wherein any voids are potted.
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 a plurality of discs formed of insulating material, each disc having a passage for the conductor to follow, electrically isolating it from any other end turn wire or winding phase, each axial conductor being threaded within a ceramic tube that is inserted into a slot provided in a stack of laminations and insulating the axial conductors from the stack of laminations.