Rotary electric machine comprising a rotor and a stator for the passage of a fluid
View Patent ↗The present invention is an electrical machine comprising a rotor ( 10 ) and a stator ( 12 ) having radial passages ( 28 ) arranged circumferentially along the stator, magnetic-flux generators ( 34 ) housed in the passages, and a stator bearing ( 24 ) containing the rotor. According to the invention, the radial passages ( 28 ) comprise fluid-circulation galleries ( 36 ) facing the magnetic-flux generators ( 34 ).
1. An electrical machine comprising:
a stator and a rotor;
a stator bearing containing the rotor;
the stator including radial passages which are substantially triangular in shape with a tip of the substantially triangular passages being proximate to and directed towards the stator bearing and the radial passages are located circumferentially in and around the stator;
the stator having an annular planar external border; and
magnetic flux generators housed radially outward from the tips of the substantially triangular in shape radial passages and being adjacent to the annular planar external border, elongated radial webs bounding each radial passage and which conduct magnetic flux from the magnetic flux generators to the stator bearing and the radial passages circulating cooling fluid to cool the magnetic flux generators, each radial passage being divided into a first radial outward portion having a first radial dimension and which houses one of the magnetic flux generators located radially away from the rotor and into a second radial inward portion having a second radial dimension and in which the cooling fluid flows with the second radial inward portion being located between the stator bearing and a radially inward portion of the magnetic flux generator and the second radial dimension being greater than the first radial dimension.
2. The electrical machine according to claim 1 wherein the radial webs extend substantially parallel to a longitudinal axis of the stator.
3. The electrical machine according to claim 2 wherein the radial webs are inclined in an axial direction with respect to the longitudinal axis of the stator.
4. The electrical machine according to claim 3 wherein the cooling fluid is gaseous.
5. The electrical machine according to claim 3 wherein the cooling fluid is liquid.
6. The electrical machine according to claim 2 wherein the radial webs are twisted with respect to the longitudinal axis of the stator.
7. The electrical machine according to claim 6 wherein the cooling fluid is gaseous.
8. The electrical machine according to claim 6 wherein the cooling fluid is liquid.
9. The electrical machine according to claim 2 wherein the cooling fluid is gaseous.
10. The electrical machine according to claim 2 wherein the cooling fluid is liquid.
11. The electrical machine according to claim 1 wherein the radial webs are inclined in an axial direction with respect to a longitudinal axis of the stator.
12. The electrical machine according to claim 11 wherein the cooling fluid is gaseous.
13. The electrical machine according to claim 11 wherein the cooling fluid is liquid.
14. The electrical machine according to claim 1 wherein the radial webs are twisted with respect to a longitudinal axis of the stator.
15. The electrical machine according to claim 14 wherein the cooling fluid is gaseous.
16. The electrical machine according to claim 14 wherein the cooling fluid is liquid.
17. The electrical machine according to claim 1 wherein a longitudinal section of the radial webs has an aerodynamic profile which is wing or is tear shaped.
18. The electrical machine according to claim 17 wherein the cooling fluid is gaseous.
19. The electrical machine according to claim 1 wherein the cooling fluid is gaseous.
20. The electrical machine according to claim 1 wherein the cooling fluid is liquid.