Electric motor with circulator pump
View Patent ↗To create an electric motor, comprising a rotor and a stator, whereby the rotor is spherically supported, which motor has a high efficiency, it is proposed, that the rotor produces a magnetic field, that the surface of the rotor facing the stator has a spherical configuration, that the rotor and stator are adapted to each other so that a maximal magnetic attraction force which keeps the rotor on the spherical bearing is larger than the maximal axial counterforce.
1. A circulator pump, comprising:
a rotor and a stator, whereby the rotor is supported on a spherical bearing; and
an impeller connected to the rotor,
wherein:
the rotor comprises permanent magnetic poles distributed over a circumference of the rotor with alternating polarity, said poles creating a magnetic field,
a surface of the rotor facing the stator has a spherical configuration,
substantially all of an axial magnetic holding force, which keeps the rotor on the spherical bearing, is generated by the magnetic field created by the permanent magnetic poles interacting with a stator yoke,
the axial magnetic holding force is substantially larger than an axial counterforce under all conditions,
the axial counterforce is a hydraulic force created by the impeller, and
an electric motor formed by the rotor and the stator is a synchronous motor.
2. The circulator pump according to claim 1 , wherein the stator yoke is arranged around the rotor.
3. The circulator pump according to claim 2 , wherein the yoke surrounding the rotor has a closed configuration.
4. The circulator pump according to claim 2 , wherein the yoke is arranged annularly around the rotor.
5. The circulator pump according to claim 2 , wherein the yoke has a spherical surface facing the rotor.
6. The circulator pump according to claim 2 , wherein the rotor and the yoke are substantially concentric to each other.
7. The circulator pump according to claim 2 , wherein the yoke has an inner diameter which varies monotonously perpendicular to an axis of rotation of the rotor.
8. The circulator pump according to claim 7 , wherein the inner diameter of the yoke decreases in a direction of the magnetic holding force.
9. The circulator pump according to claim 7 , wherein one end of the yoke has a finite diameter.
10. The circulator pump according to claim 2 , wherein a surface of the yoke facing the rotor has a shape of a section of a hollow sphere.
11. The circulator pump, according to claim 10 , wherein a first side of the section of the hollow sphere has a smaller diameter than a second side, whereby the normals on the first side and the second side run parallel to an axis of rotation of the rotor.
12. The circulator pump according to claim 11 , wherein the first side has a greater distance to the bearing than the second side.
13. The circulator pump according to claim 2 , wherein the surface of the rotor facing the stator has a form of a section of a sphere.
14. The circulator pump according to claim 2 , wherein between the rotor and the yoke an air gap is formed in which one or more windings of the stator are arranged.
15. The circulator pump according to claim 1 , wherein a separation wall is positioned between the rotor and the stator.
16. The circulator pump according to claim 15 , wherein the separation wall is made out of an electrically non-conductive material.
17. The circulator pump according to claim 15 , wherein the separation wall is thermally insulating.
18. The circulator pump according to claim 15 , wherein the separation wall has a connecting element, which closes it on a first side of the yoke.
19. The circulator pump according to claim 18 , wherein the connecting element forms a unit with a post for a sliding body of the rotor.
20. The circulator pump according to claim 2 , wherein the yoke has an axial extension which is adapted to an axial extension of the rotor.