Method to manufacture an electric machine, installation, vehicle

Patent metadata

Field	Value
Publication number	US-11888362-B2
Application number	US-202117460486-A
Country	US
Kind code	B2
Filing date	Aug 30, 2021
Priority date	Aug 31, 2020
Publication date	Jan 30, 2024
Grant date	Jan 30, 2024

Abstract

A method for manufacturing an electric machine having a stack of magnetic laminations including a stack of green blanks. A first green blank of the stack is printed. A separating layer is applied to the first green blank. At least a second green blank of a magnetic lamination is printed onto the first green blank with the separating layer. The green blanks are jointly sintered.

First claim

The invention claimed is:

1. A method for manufacturing an electric machine including a stack of magnetic laminations, the method comprising:
printing a first green blank of the stack of magnetic laminations; wherein green blanks of the stack of magnetic laminations include an n-fold rotational symmetry;
applying a first separating layer to the first green blank;
rotating the first green blank by an angle of 360°/n or by a multiple of the angle;
printing at least a second green blank of the stack of magnetic laminations onto the first separating layer of the first green blank; and
jointly sintering at least the first green blank and the second green blank of the stack of magnetic laminations.

2. The method of claim 1 , further comprising:
applying a second separating layer to the second green blank of the stack of magnetic laminations; and
printing at least one further green blank of the stack of magnetic laminations onto the second green blank.

3. The method of claim 1 , wherein the first green blank and the second green blank are printed by screen printing, stencil printing, or screen printing and stencil printing.

4. The method of claim 1 , wherein the first separating layer is at least one of formed with ceramic particles, applied with a green-blank coverage of at least 75 percent, formed with aluminum oxide, formed with yttrium oxide, formed with magnesium oxide, formed with aluminum nitride, formed with boron nitride, formed with YAG materials, or formed with mica materials.

5. The method of claim 1 , wherein applying the separating layer comprises applying by a suspension, wherein the suspension is dried before a further green blank is printed.

6. The method of claim 1 , further comprising sintering the stack of magnetic laminations to form the stack of magnetic laminations.

7. The method of claim 1 , further comprising:
introducing resin between magnetic laminations of the stack of magnetic laminations, wherein the resin electrically insulates the magnetic laminations from one another.

8. The method of claim 1 , further comprising:
forming a rotor, a stator, or the rotor and the stator of the electric machine with the stack of magnetic laminations.

Assignees

• Soller Thomas
• Vollmer Rolf
• Schuh Carsten
• Siemens Ag

Inventors

• Soller Thomas
• Vollmer Rolf
• Schuh Carsten

Classifications

• H02K15/02 Primary

  of stator or rotor bodies · CPC title

• H02K15/00 Primary

  Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines · CPC title

• B22F7/06 Primary

  of composite workpieces or articles from parts, e.g. to form tipped tools {(B22F7/002 takes precedence)} · CPC title

• H02K15/03

  having permanent magnets · CPC title

• C22C2202/02

  Magnetic · CPC title