Granted Patent B2

US 12,614,937 · App. 18/258,179 · Granted Apr 28, 2026

Inventor: Jere Kolehmainen (Saint-Aubin-lès-Elbeuf, FR)

Assignees: AMPERE S.A.S.; WHYLOT

H02K1/2796H01F7/0221H02K1/02H02K1/182H02K15/03H02K15/035H02K15/12H02K2213/12

Abstract

Claims (35)

1 . An element with magnetic poles for a rotor of an axial flux electric machine, the element with magnetic poles comprising:

an assembly of a plurality of individual magnets distributed in at least two distinct groups within which each individual magnet is in contact with at least one other individual magnet by a glue or resin layer; and

a flange including

a first part at least surrounding said assembly of individual magnets to immobilize the individual magnets in position, and

a second part extending between the at least two distinct groups,

at least one portion of the flange being made of a material comprising a mixture of polymer and magnet powder.

2 . The element with magnetic poles according to claim 1 , wherein the flange is fully made of said material.

3 . The element with magnetic poles according to claim 2 , wherein the polymer is of the thermosetting type.

4 . The element with magnetic poles according to claim 1 , wherein the polymer is of the thermosetting type.

5 . A rotor for an axial flux electric machine, the rotor comprising:

a disc-shaped body which is centered on an axis of rotation and which delimits at least one housing which houses the element with magnetic poles according to claim 1 .

6 . An axial flux electric machine comprising:

at least one rotor according to claim 5 ; and

at least one disc-shaped stator centered on the axis of rotation.

7 . A method for assembling the rotor according to claim 5 , the method comprising steps of:

manufacturing the disc-shaped body;

gluing the individual magnets in at least one one-piece group; then

casting said material on the individual magnets and polymerizing said material to form the at least one element with magnetic poles;

installing each of the at least one element with magnetic poles in each of the at least one housing of the disc-shaped body; and

fixing each of the at least one element with magnetic poles on the disc-shaped body.

8 . A method for assembling the rotor according to claim 5 , the method comprising steps of:

manufacturing the disc-shaped body;

creating at least one one-piece individual magnet group by cutting a magnet block over a thickness corresponding at least to the thickness of the rotor, by leaving a base uncut of said magnet block holding said individual magnets together;

casting said material on the individual magnets and polymerizing said material;

cutting the base to form the at least one element with magnetic poles; and

installing each of the at least one element with magnetic poles in each of the at least one housing of the disc-shaped body.

9 . A method for assembling the rotor according to claim 5 , the method comprising steps of:

manufacturing the disc-shaped body;

gluing the individual magnets in at least one one-piece group;

installing the individual magnets in each of the at least one housing of the disc-shaped body; and

casting said material on the individual magnets and the disc-shaped body, and polymerizing said material.

10 . A method for assembling the rotor according to claim 5 , the method comprising steps of:

manufacturing the disc-shaped body;

installing each of the individual magnets in each of at least one housing of the disc-shaped body; and

casting said material on the individual magnets and the disc-shaped body, and polymerizing said material.

Assignments (2)

Priority Claims (1)

Continuity (1)

References Cited (40)