Axial flux stator

Patent metadata

Field	Value
Publication number	US-10583409-B2
Application number	US-201615087712-A
Country	US
Kind code	B2
Filing date	Mar 31, 2016
Priority date	Mar 31, 2016
Publication date	Mar 10, 2020
Grant date	Mar 10, 2020

Abstract

The system and method of the invention pertains to an axial flux stator is implemented to replace the drive-end magnets and the drive motor. The axial flux stator comprises a control circuit to control the voltage and current provided to the stator, to measure the torque and speed of rotation, and to measure the magnetic flux and magnetic flux density produced by the axial flux stator and impeller magnets, individually or in combination. The axial flux stator comprises a plurality of current carrying elements to produce magnetic flux in an axial direction and drive the impeller.

First claim

The invention claimed is:

1. A system utilized as bioreactor mixer, the system comprising:
a rotating drive;
a fixed shaft;
an impeller capable of rotating around the fixed shaft; and
a first set of magnets in a first wedge array format positioned at a drive end adjacent the rotating drive and a second set of magnets in a second wedge array format positioned at the impeller;
wherein the rotating drive is a drive stator, wherein the drive stator comprises a core, and the core comprises one or more conic-shaped teeth.

2. The system of claim 1 , wherein the drive stator is an axial flux stator positioned on an underside of the plurality of magnets.

3. The system of claim 2 , wherein the axial flux stator comprises a control circuit to control the voltage and current, individually or in combination, provided to the stator.

4. The system of claim 2 , wherein the axial flux stator comprises a control circuit to measure the torque and speed of rotation.

5. The system of claim 2 , wherein the axial flux stator comprises a control circuit to measure the magnetic flux and magnetic flux density produced by the axial flux stator and impeller magnets.

6. The system of claim 2 , wherein the axial flux stator comprises a plurality of current carrying elements to produce magnetic flux in an axial direction and drive the impeller.

7. The system in claim 6 , wherein the axial flux stator comprises a core to fix the current carrying elements on.

8. The system of claim 7 , wherein the core is magnetic or non-magnetic.

9. The system of claim 1 , wherein the one or more conic shaped teeth are in a configuration around the axis of rotation.

10. The system of claim 6 , wherein at least one of the plurality of current carrying elements have a conic arrangement around the conic shaped teeth.

11. The system of claim 7 , wherein the core is magnetic and wherein the core includes a plurality of stationary segments, each segment having height and a width with modulation slots there between, the segments integrated on a plate with a central hollow axis and wherein the plurality of stationary segments are stator teeth and the current carrying elements are conductive windings wound around the stator teeth.

12. The system of claim 11 , wherein the conductive windings are divided into phases.

13. The system of claim 12 , wherein each phase of the individual windings alternates such that application of current to the winding creates a magnetic field that is directed vertically upward in one tooth and vertically downward in another tooth.

14. The system of claim 1 , wherein the impeller comprises a plurality of magnets, a back plate to enhance the magnetic coupling, a plurality of current carrying elements, one or more mixing blades, and a fixture to support the impeller from misalignment, alone or in combination.

15. The system of claim 14 , wherein the plurality of magnets are in a conic arrangement around the axis of rotation.

16. A system utilized as bioreactor mixer, the system comprising:
a rotating drive;
a fixed shaft;
an impeller capable of rotating around the fixed shaft; and
a first set of magnets in a first wedge array format positioned at a drive end adjacent the rotating drive and a second set of magnets in a second wedge array format positioned at the impeller;
wherein the rotating drive is a drive stator, wherein the core is magnetic and wherein the core includes a plurality of stationary segments, each segment having height and a width with modulation slots there between, the segments integrated on a plate with a central hollow axis.

17. The system of claim 16 , wherein the drive stator is an axial flux stator positioned on an underside of the plurality of magnets.

18. The system of claim 17 , wherein the axial flux stator comprises a control circuit to control the voltage and current, individually or in combination, provided to the stator.

19. The system of claim 17 , wherein the axial flux stator comprises a control circuit to measure the torque and speed of rotation.

20. The system of claim 17 , wherein the axial flux stator comprises a control circuit to measure the magnetic flux and magnetic flux density produced by the axial flux stator and impeller magnets.

21. The system of claim 17 , wherein the axial flux stator comprises a plurality of current carrying elements to produce magnetic flux in an axial direction and drive the impeller.

22. The system in claim 21 , wherein the axial flux stator comprises a core to fix the current carrying elements on.

23. The system of claim 22 , wherein the core is magnetic or non-magnetic.

24. The system of claim 22 , wherein the core includes stator teeth.

25. The system of claim 24 , wherein the stator teeth include one or more conic shaped teeth.

26. The system of claim 25 , wherein the one or more conic shaped teeth are in a configuration around the axis of rotation.

27. The system of claim 26 , wherein at least one of the plurality of current carrying elements have a conic arrangement around the conic shaped teeth.

28. The system of claim 21 , wherein the plurality of stationary segments are stator teeth and the current carrying elements are conductive windings wound around the stator teeth.

29. The system of claim 28 , wherein the conductive windings are divided into phases.

30. The system of claim 29 , wherein each phase of the individual windings alternates such that application of current to the winding creates a magnetic field that is directed vertically upward in one tooth and vertically downward in another tooth.

31. The system of claim 16 , wherein the impeller comprises a plurality of magnets, a back plate to enhance the magnetic coupling, a plurality of current carrying elements, one or more mixing blades, and a fixture to support the impeller from misalignment, alone or in combination.

32. The system of claim 31 , wherein the plurality of magnets are in a conic arrangement around the axis of rotation.

Assignees

• Gen Electric

Inventors

• Atalla Ashraf Said
• Gebauer Klaus
• Alexander James Pellegrino
• Torrey David Allan

Classifications

• H02K21/24

  with magnets axially facing the armatures, e.g. hub-type cycle dynamos · CPC title

• H02K11/24

  Devices for sensing torque, or actuated thereby (H02K11/27 takes precedence) · CPC title

• H02K11/21

  Devices for sensing speed or position, or actuated thereby (specially adapted for machines having non-mechanical commutating devices H02K29/06, H02K29/14) · CPC title

• C12M27/02

  Stirrer or mobile mixing elements · CPC title

• H02K11/33

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title