Axial flux rotary electric machine

Patent metadata

Field	Value
Publication number	US-11569717-B2
Application number	US-201816488870-A
Country	US
Kind code	B2
Filing date	Feb 14, 2018
Priority date	Feb 24, 2017
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

An axial flux rotary electric machine including at least one stator and at least one rotor that are arranged along an axis of rotation of the machine, the rotor including a rotor mass and housings created in the rotor mass, the housings defining magnetic poles of the rotor, each of the housings being able to contain or not contain at least one permanent magnet.

First claim

The invention claimed is:

1. An axial flux rotary electric machine, comprising at least one stator and at least one rotor that are arranged along an axis of rotation of the machine, the rotor comprising a rotor mass and receptacles created in the rotor mass, the receptacles defining magnetic poles of the rotor, each of said receptacles being able to contain or not contain at least one permanent magnet,
wherein the receptacles are open toward an air gap between the rotor and the stator, and
wherein the receptacles are U-shaped when viewed perpendicular to the axis of rotation of the machine.

2. The machine as claimed in claim 1 , having no permanent magnets.

3. The machine as claimed in claim 1 , the rotor comprising receptacles having no permanent magnets and others comprising one or more permanent magnets.

4. The machine as claimed in claim 3 , in which the rotor comprises a first magnetic pole and a second magnetic pole adjacent to the first magnetic pole, the first and second magnetic poles being of different polarity, receptacles belonging to the first magnetic pole having no permanent magnets and receptacles belonging to the second magnetic pole comprising one or more permanent magnets.

5. The machine as claimed in claim 1 , a magnetic pole of the rotor being defined by a receptacle or a plurality of receptacles that are cylindrical and concentric with one another.

6. The machine as claimed in claim 1 , the stator comprising teeth and windings arranged on the teeth.

7. The rotary electric machine as claimed in claim 6 , in which the teeth of the stator each have an essentially prismatic general shape.

8. The rotary electric machine as claimed in claim 7 , comprising, in cross section considered perpendicularly to the axis of rotation of the machine, two concentric circle portions that are connected by two radii, or two linear portions connected by two radii.

9. The machine as claimed in claim 7 , the teeth of the stator each bearing two windings arranged on the corresponding tooth on either side of the annular stator armature, each one of these two windings facing one of the two rotors.

10. The machine as claimed in claim 1 , comprising at least two rotors arranged on either side of the stator along the axis of rotation of the machine.

11. The machine as claimed in claim 1 , constituting a motor.

12. The machine as claimed in claim 1 , constituting a generator.

13. The machine as claimed in claim 1 , in which a magnetic pole of the rotor is defined by at least one receptacle whose general shape is a cylinder, a cylinder of revolution, conical or frustoconical.

14. The machine as claimed in claim 13 , in which the general shape of the cylindrical receptacle, when observed in a plane perpendicular to the axis of rotation of the machine, is annular, circular, square, triangular, rectangular or also comprising two slots that converge toward the axis of rotation of the machine.

15. The machine as claimed in claim 13 , in which a receptacle having the general shape of a cylinder of revolution comprises a bottom part.

16. An axial flux rotary electric machine, comprising:
at least one stator and at least one rotor that are arranged along an axis of rotation of the machine, the rotor comprising a rotor mass and receptacles created in the rotor mass, the receptacles defining magnetic poles of the rotor, each of said receptacles being able to contain or not contain at least one permanent magnet, and
one or more permanent magnets contained in one or more of the receptacles,
wherein the permanent magnets are oriented radially, along a radius of the machine, or are oriented radially, along a radius of the machine and axially, perpendicular to the longitudinal axis of the machine, and
wherein the receptacles are U-shaped when viewed perpendicular to the axis of rotation of the machine.

17. An axial flux rotary electric machine, comprising at least one stator and at least one rotor that are arranged along an axis of rotation of the machine, the rotor comprising a rotor mass and receptacles created in the rotor mass, the receptacles defining magnetic poles of the rotor, each of said receptacles being able to contain or not contain at least one permanent magnet,
wherein a magnetic pole of the rotor is defined by at least one receptacle whose general shape is a cylinder, a cylinder of revolution, conical or frustoconical,
wherein the rotor comprises receptacles having no permanent magnets and receptacles comprising one or more permanent magnets, and
wherein the receptacles are U-shaped when viewed perpendicular to the axis of rotation of the machine.

Assignees

• Leroy Somer Moteurs

Inventors

• Prieto Dany
• Akiki Paul
• Jannot Xavier
• Daguse Benjamin

Classifications

• H02K1/2793

  Rotors axially facing stators · CPC title

• H02K16/02 Primary

  Machines with one stator and two {or more} rotors · CPC title

• H02K1/246

  Variable reluctance rotors · CPC title

• H02K1/2798 Primary

  where both axial sides of the stator face a rotor · CPC title