Armature segment, armature and methods for assembling them
The present disclosure relates to armature segments for an armature for an electrical machine. An armature segment may comprise a plurality of coils and an electrically insulating supporting structure providing structural support to the plurality of coils. An armature may comprise a plurality of armature segments. The present disclosure further relates to methods for assembling such armature segments and armature.
1. An armature segment for an armature of a superconducting electrical machine, the armature segment comprising:
a plurality of coils spaced along a circumferential direction;
an electrically insulating supporting structure providing structural support to the plurality of coils; and
wherein the coils comprise a first side portion and a second side portion, the first and second side portions connected via end portions, and the first and second side portions radially and circumferentially displaced from one another.
2. The armature segment of claim 1 , wherein the electrically insulating supporting structure comprises a first electrically insulating wall, and a second electrically insulating wall placed at a radial distance from the first electrically insulating wall, the plurality of coils placed between the first and second electrically insulating walls.
3. The armature segment of claim 2 , wherein the electrically insulating supporting structure further comprises an electrically insulating coil side separator extending along a circumferential direction between the first and second side portions of the coils.
4. The armature segment of claim 1 , wherein the electrically insulating supporting structure comprises a composite material including fibers and resin surrounding the plurality of coils.
5. The armature segment of claim 1 , further comprising a plurality of cooling channels.
6. An armature for an electrical machine, comprising a plurality of the armature segments according to claim 1 attached to an armature support structure along a circumferential direction.
7. A superconducting generator comprising:
a magnetic field generator,
a superconducting field winding placed concentric to the magnetic field generator; and
the armature according to claim 6 .
8. A wind turbine comprising: a tower; a nacelle on top of the tower; a rotor including one or more wind turbine blades mounted to the nacelle; and the superconducting generator of claim 7 .
9. An armature segment for an armature of a superconducting electrical machine, the armature segment comprising:
a plurality of coils spaced along a circumferential direction;
an electrically insulating supporting structure providing structural support to the plurality of coils:
wherein the coils comprise a first side portion and a second side portion, the first and second side portions connected via end portions, and the first and second side portions radially and circumferentially displaced from one another;
wherein the electrically insulating supporting structure comprises a composite material including fibers and resin surrounding the plurality of coils; and
wherein the electrically insulating supporting structure further comprises a jig in which the plurality of coils are arranged, the composite material surrounding the jig.
10. A method for assembling an armature for a superconducting electrical machine, the method comprising:
providing a plurality of armature segments, wherein the armature segments include a plurality of coils and an electrically insulating supporting structure providing structural support to the plurality of coils;
attaching the plurality of armature segments to an armature support structure; and
wherein the attaching a plurality of armature segments to the armature support structure comprises attaching the armature segments to an outer armature segment support before attaching the armature segments to the armature support structure.
11. The method of claim 10 , wherein the attaching a plurality of armature segments to the armature support structure comprises using a plurality of armature segment assembly carts to move the armature segments to the armature support structure.
12. The method of claim 10 , wherein the attaching a plurality of armature segments to the armature support structure comprises attaching a shield to the armature support structure before attaching the armature segments to the armature support structure.
13. The method of claim 10 , wherein the providing a plurality of armature segments comprises attaching a plurality of coils to a first electrically insulating wall; and attaching a second electrically insulating wall to the plurality of coils already attached to the first insulating wall.
14. A method for assembling an armature for a superconducting electrical machine, the method comprising:
providing a plurality of armature segments wherein the armature segments include a plurality of coils and an electrically insulating supporting structure providing structural support to the plurality of coils;
attaching the plurality of armature segments to an armature support structure; and
wherein the providing a plurality of armature segments includes arranging a plurality of coils in a jig; surrounding the plurality of coils arranged in the jig with fibers and resin; and curing the resin.