Axial flux motor

Patent metadata

Field	Value
Publication number	US-11936246-B2
Application number	US-202016733593-A
Country	US
Kind code	B2
Filing date	Jan 3, 2020
Priority date	Nov 5, 2018
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

Provided is an axial flux motor including a rotor having a wound ribbon core, the wound ribbon core including a metal amorphous nanocomposite material. The axial flux motor further includes a stator assembly spaced apart from the rotor along a rotation axis of the rotor. The stator assembly includes a body including a metal amorphous nanocomposite material and a plurality of permanent magnets substantially free of rare-earth materials. The plurality of permanent magnets is arranged on the body of the stator assembly.

First claim

The invention claimed is:

1. An axial flux motor comprising:
a rotor comprising a wound ribbon core, the wound ribbon core comprising a metal amorphous nanocomposite material without secondary crystallization; and
a stator assembly spaced apart from the rotor along a rotation axis of the rotor, the stator assembly comprising:
at least one second wound ribbon core comprising a metal amorphous nanocomposite material without secondary crystallization; and
a plurality of permanent magnets substantially free of rare-earth materials, the plurality of permanent magnets arranged on the at least one second wound ribbon core.

2. The axial flux motor of claim 1 , wherein the rotor comprises a FeNi compound.

3. The axial flux motor of claim 1 , wherein the plurality of permanent magnets comprises at least six permanent magnets.

4. The axial flux motor of claim 1 , wherein the stator assembly comprises a three-phase stator assembly.

5. The axial flux motor of claim 4 , wherein the stator assembly comprises a number of slots, the number of slots being a multiple of six.

6. The axial flux motor of claim 5 , wherein the number of slots is selected from a group consisting of 6, 12, 18, and 24.

7. The axial flux motor of claim 5 , wherein a coil is wound around a permanent magnet of the plurality of permanent magnets and each slot of the stator assembly.

8. The axial flux motor of claim 1 , wherein the rotor has a number of poles, a ratio of the number of poles of the rotor to the number of slots of the stator assembly selected from a group consisting of 2:3, 5:6, 7:6, and 4:3.

9. The axial flux motor of claim 8 , wherein the number of slots in the stator assembly is 12 and the number of poles of the rotor is selected from a group consisting of 8, 10, 14, and 16.

10. The axial flux motor of claim 1 , wherein the stator assembly comprises:
a first stator spaced apart from a first side of the rotor; and
a second stator spaced apart from a second side of the rotor.

11. The axial flux motor of claim 1 , wherein the rotor comprises:
a first rotor arranged on a first side of the stator assembly; and
a second rotor arranged on a second side of the stator assembly,
wherein the first rotor and the second rotor are connected via a shaft.

12. The axial flux motor of claim 1 , further comprising a housing, the stator assembly being fixed to the housing and the rotor being rotatable relative to the housing.

13. The axial flux motor of claim 1 , wherein the metal amorphous nanocomposite material comprises a Fe-Ni compound comprising 20-80% Ni.

14. The axial flux motor of claim 1 , wherein the rotor has a number of poles formed of the amorphous nanocomposite materials such that the poles exhibit no polarity.

15. The axial flux motor of claim 1 , wherein the wound ribbon core and/or the second wound ribbon core comprises a ribbon of a FeNi compound, the ribbon having a width of from 25 mm to 50 mm.

Assignees

• Univ Carnegie Mellon

Inventors

• Simizu Satoru
• Ohodnicki Jr Paul Richard
• Mchenry Michael Edward

Classifications

• H02K1/2796 Primary

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

• H02K1/02

  characterised by the magnetic material · CPC title

• H02K3/12

  arranged in slots · CPC title

• H02K19/10

  for multi-phase current · CPC title

• H02K21/44

  with armature windings wound upon the magnets · CPC title