Tooth-wound stator assembly
There is provided a stator and a method of making the same. For example, there is provided a stator that includes a single piece yoke and a set of teeth mounted on an inner surface of the single piece yoke. Each tooth is pre-wound with a coil and includes a tail portion configured to secure the tooth on the inner surface. Furthermore, at least two teeth of the set of teeth are mounted on the single piece yoke at a slot opening distance of less than about 35%.
1. A stator, including:
a single piece yoke; and
a set of teeth mounted on an inner surface of the single piece yoke, each tooth being pre-wound with a coil and including a tail portion configured to secure the tooth on the inner surface;
wherein at least two teeth of the set of teeth are mounted on the single piece yoke at a slot opening distance of less than about 35% of an arc length extending from a center of one of the at least two teeth to a center of the other one of the at least two teeth; and
a member disposed between at least one tooth of the set of teeth and an un-wound tooth of the set of teeth, to provide compression of a coil on a side of the at least one tooth, wherein the member is non-metallic.
2. The stator of claim 1 , wherein at least one tooth from the set of teeth is made from a material different from a material of the single piece yoke.
3. The stator of claim 1 , wherein at least one tooth from the set of teeth and the single piece yoke are made of a same material.
4. The stator of claim 1 , wherein the coil is a copper filament.
5. The stator of claim 1 , wherein the tail portion is a dove tail-shaped portion.
6. The stator of claim 1 , wherein the member is substantially V-shaped.
7. The stator of claim 1 , wherein the coil is encapsulated in an insulating layer.
8. The stator of claim 1 , wherein the stator is part of a motor having tooth-wound armature coils.
9. The stator of claim 1 , wherein teeth from the set of teeth are separable from the single piece yoke.
10. The stator of claim 1 , wherein the single piece is an edge-wound yoke.
11. A method for assembling a stator of an electric machine, the method comprising:
providing a single piece yoke;
winding each tooth of a set of teeth with a coil; and
mounting each tooth on an inner surface of the single piece yoke, subsequent to the winding;
wherein at least two teeth of the set of teeth are mounted on the single piece yoke at a slot opening distance of less than about 35% of an arc length extending from a center of one the at least two teeth to a center of the other one of the at least two teeth; and
disposing a member between at least one tooth of the set of teeth and an un-wound tooth of the set of teeth, to provide compression of a coil on a side of the at least one tooth, wherein the member is non-metallic.
12. The method of claim 11 , further comprising encapsulating the coil.
13. The method of claim 11 , wherein the member is a substantially V-shaped member.
14. The method of claim 11 , wherein the winding is performed via a bobbin-winding process.
15. The method of claim 11 , each tooth is mounted on the inner surface via a tail portion of the tooth.
16. The method of claim 15 , wherein the tail portion is a dove tail-shaped portion.
17. The method of claim 11 , wherein the winding is performed through an automated winding process.