Granted Patent B2

US 12,732,039 · App. 18/728,626 · Granted Sep 8, 2026

Inventors: Rolf Vollmer (Gersfeld, DE); Reiner Seufert (Salz, DE)

Assignee: Siemens Aktiengesellschaft

H02K1/2773H02K1/02H02K15/03H02K21/14

Abstract

Claims (31)

1 . A rotor for a dynamoelectric rotary machine, the rotor comprising a rotor layer, said rotor layer comprising:

an at least substantially cylindrical recess for receiving a shaft;

a first material made of a soft magnetic material and formed in a region of the rotor in which a d-axis flux path of a magnetic flux caused by a magnetic stator field generated by a stator winding is located;

a second material made of a non-magnetic material and formed in a region of the rotor in which a q-axis flux path of the magnetic flux is located, with the first material and the second material being connected by a material bond through sintering;

a first rotor region in surrounding relation to an inner periphery of the rotor layer in which first rotor region the second material is formed;

a second rotor region adjacent to an outer periphery of the rotor layer in which second rotor region the second material is formed, with a d-axis of the dynamoelectric rotary machine running through the second rotor region;

a third rotor region arranged between the first and second rotor regions and formed in a shape of a rectangle, with the first rotor region having a portion shaped so as to be flush with a side of the tangential rectangular third rotor region, and with the second rotor region having a portion shaped so as to be flush with a side of the tangential rectangular third rotor region;

a third material made of a permanent magnetic material and arranged in the third rotor region such as to be tangential to the first and second rotor regions;

two further rotor regions adjacent to the outer periphery of the rotor layer, in which two further rotor regions the second material is formed; and

an additional rotor region between the two further rotor regions and tangential thereto, in which additional rotor region the third material is formed, with a q-axis of the dynamoelectric rotary machine running through the additional region.

2 . The rotor of claim 1 , wherein the soft magnetic material is iron and/or cobalt.

3 . The rotor of claim 1 , wherein the non-magnetic material is non-magnetic steel.

4 . The rotor of claim 1 , wherein the non-magnetic material is E316.

5 . The rotor of claim 1 , wherein the first rotor region includes star-shaped extensions.

6 . The rotor of claim 1 , further comprising a plurality of said rotor layer arranged one behind the other.

7 . A method for producing a rotor as set forth in claim 1 , with the rotor including a material layer comprising a first region having a first material, a second region having a second material, and a cut-out, the method comprising:

applying a first suspension having a binder and solid particles through a first stencil to a base surface to obtain a first green body, with the first region being mapped by the first stencil;

applying a second suspension having a binder and solid particles through a second stencil to a base surface to obtain a second green body, with the second region being mapped by the second stencil;

joining the first green body and the second green body;

creating a permanent material-bonded cohesion of the first and second green bodies and the solid particles by at least one of heating, compaction, and sintering, to form the material layer;

arranging a plurality of said material layer; and

inserting magnetic material into the cut-out.

8 . The method of claim 7 , wherein the magnetic material is prefabricated magnetic material.

9 . A dynamoelectric rotary machine, comprising:

a stator comprising a stator winding generating a magnetic stator field to cause a magnetic flux; and

a rotor comprising a rotor layer, said rotor layer comprising an at least substantially cylindrical recess for receiving a shaft, a first material made of a soft magnetic material and formed in a region of the rotor in which a d-axis flux path of a magnetic flux caused by a magnetic stator field generated by a stator winding is located, a second material made of a non-magnetic material and formed in a region of the rotor in which a q-axis flux path of the magnetic flux is located, with the first material and the second material being connected by a material bond through sintering, a first rotor region in surrounding relation to an inner periphery of the rotor layer in which first rotor region the second material is formed, a second rotor region adjacent to an outer periphery of the rotor layer in which second rotor region the second material is formed, with a d-axis of the dynamoelectric rotary machine running through the second rotor region, a third rotor region arranged between the first and second rotor regions and formed in a shape of a rectangle, with the first rotor region having a portion shaped so as to be flush with a side of the tangential rectangular third rotor region, and with the second rotor region having a portion shaped so as to be flush with a side of the tangential rectangular third rotor region, a third material made of a permanent magnetic material and arranged in the third rotor region such as to be tangential to the first and second rotor regions, two further rotor regions adjacent to the outer periphery of the rotor layer, in which two further rotor regions the second material is formed, and an additional rotor region between the two further rotor regions and tangential thereto, in which additional rotor region the third material is formed, with a q-axis of the dynamoelectric rotary machine running through the additional region.

10 . The dynamoelectric rotary machine of claim 9 , wherein the soft magnetic material is iron and/or cobalt.

11 . The dynamoelectric rotary machine of claim 9 , wherein the non-magnetic material is non-magnetic steel.

12 . The dynamoelectric rotary machine of claim 9 , wherein the non-magnetic material is E316.

13 . The dynamoelectric rotary machine of claim 9 , wherein the first rotor region includes star-shaped extensions.

14 . The dynamoelectric rotary machine of claim 9 , wherein the rotor comprises a plurality of said rotor layer arranged one behind the other.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (171)