Stator assembly for electric machines
A stator assembly is provided with detachable teeth that are made of magnetic powder material. The teeth are so configured and sized as to be interconnected to a core body of the stator with pre-formed coils that are positioned between adjacent teeth.
1. A stator for an electric machine, comprising:
a generally cylindrical core body having an external surface provided with longitudinal generally non-symmetric V-shaped grooves;
a plurality of teeth each having a generally T-shaped cross-section providing a single generally non-symmetric rounded V-shaped end so configured and sized as to be insertable in a corresponding longitudinal generally non-symmetric V-shaped groove of the core body;
a plurality of coils provided between the plurality of teeth; and
a wrapping layer so configured as to enclose the plurality of teeth when assembled to the core body.
2. A stator as recited in claim 1 , wherein the core body is made of a plurality of stacked laminations.
3. A stator as recited in claim 1 , wherein the cylindrical core body has a central aperture therein; the stator further comprising a cooling assembly mounted in the central aperture.
4. A stator as recited in claim 3 , wherein the cooling assembly is an air cooling assembly.
5. A stator as recited in claim 3 , wherein the cooling assembly is a liquid cooling assembly.
6. A stator as recited in claim 5 , wherein the liquid cooling assembly is made of a thermally conductive material containing aluminum.
7. A stator as recited in claim 6 , wherein the cooling assembly includes a liquid inlet and a liquid outlet.
8. A stator as recited in claim 1 , wherein each tooth is made of magnetic powder material.
9. A stator as recited in claim 8 , wherein the magnetic powder material includes sintered magnetic flakes.
10. A stator as recited in claim 1 , wherein each tooth has at least one metallic cooling projection.
11. A stator as recited in claim 1 , wherein each tooth has a projection provided at both longitudinal ends thereof.
12. A stator as recited in claim 1 , further comprising longitudinal strips of magnetically conductive material provided between adjacent teeth.
13. A stator as recited in claim 12 , wherein the core body is made of non-magnetically conductive material and includes an integral cooling assembly.
14. A stator as recited in claim 12 , wherein each longitudinal strip is made of magnetic powder material.
15. A stator as recited in claim 14 , wherein the magnetic powder material includes sintered magnetic flakes.