Cooling assembly for electric machines
A cooling assembly for the stator of an electric machine provided with coils including heads is described herein. The cooling assembly includes a generally cylindrical cooling body provided with opposite longitudinal ends and at least one head-cooling element mounted to one of the longitudinal end of the body; the head-cooling element being so configured as to enclose heads of the coils and to receive heat conducting material therein.
1. A cooling assembly for the stator of an electric machine provided with coils including heads; the cooling assembly including:
a generally cylindrical cooling body provided with opposite longitudinal ends; and
a head-cooling element mounted to one of the longitudinal ends of the generally cylindrical cooling body; the head-cooling element being so configured as to enclose the heads of the coils and to receive heat conducting material therein; the head-cooling element having a generally torus shape and including a circular flange provided with apertures so configured and sized as to allow fasteners to mount the head-cooling element to a longitudinal end of the generally cylindrical cooling body.
2. A cooling assembly as recited in claim 1 , wherein the coils are prewound coils made of rectangular wire.
3. A cooling assembly as recited in claim 1 , wherein the stator has a cylindrical cooling surface contacting the generally cylindrical cooling body.
4. A cooling assembly as recited in claim 1 , wherein the circular flange includes an inwardly projecting triangular shoulder.
5. A cooling assembly as recited in claim 1 , wherein the heat-conducting material includes a thermally conducting resin.
6. A cooling assembly as recited in claim 1 , further comprising a second head-cooling element mounted to the other longitudinal end of the body.
7. A cooling assembly as recited in claim 1 , wherein the head-cooling element is integral with the generally cylindrical cooling body.
8. A cooling assembly as recited in claim 1 , wherein the head-cooling element is provided with a longitudinally slotted peripheral skirt.
9. A cooling assembly as recited in claim 8 , wherein the slots of the peripheral skirt extend in a rounded portion of the head-cooling element.
10. A stator for electric machine, the stator comprising:
a cooling surface;
a plurality of slots so configured as to receive coils therein, each coil being provided with heads at longitudinal ends thereof;
a generally cylindrical cooling body provided with opposite longitudinal ends and a cooling surface so configured as to contact the cooling surface of the stator; and
a head-cooling element mounted to one of the longitudinal ends of the generally cylindrical cooling body; the head-cooling element being so configured as to enclose the heads of the coils and to receive heat conducting material therein; the head-cooling element having a generally torus shape and including a circular flange provided with apertures so configured and sized as to allow fasteners to mount the head-cooling element to a longitudinal end of the generally cylindrical cooling body.
11. A stator as recited in claim 10 , wherein the circular flange includes an inwardly projecting triangular shoulder.
12. A stator as recited in claim 10 , wherein the heat-conducting material includes a thermally conducting resin.
13. A stator as recited in claim 10 , further comprising a second head-cooling element mounted to the other longitudinal end of the body.
14. A stator as recited in claim 10 , wherein the head-cooling element is integral with the generally cylindrical cooling body.
15. A stator as recited in claim 10 , wherein the head-cooling element is provided with a longitudinally slotted peripheral skirt.
16. A stator as recited in claim 15 , wherein the slots of the peripheral skirt extend in a rounded portion of the head-cooling element.