Method for producing a rotor

Patent metadata

Field	Value
Publication number	US-9941758-B2
Application number	US-201514804975-A
Country	US
Kind code	B2
Filing date	Jul 21, 2015
Priority date	Jul 22, 2014
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

In a method for producing a rotor, permanent magnets are arranged about a lateral surface in a recess of a rotor body from a selected position, e.g. a central position of the longitudinal extension of the rotor body, toward one side or toward two sides along an axis of rotation of the rotor body in side-by-side disposition. An end plate band covers a variable gap formed as a result of manufacturing tolerances of the permanent magnets between an outer face of an outermost one of the permanent magnets and an inner surface of the recess in an area of the recess which is non-parallel to the lateral surface. Subsequently, the permanent magnets and the end plate band are covered with a sleeve.

First claim

What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims and includes equivalents of the elements recited therein:

1. A method for producing a rotor, comprising:
arranging permanent magnets about a lateral surface in a recess of a rotor body from a selected position toward one side or toward two sides along an axis of rotation of the rotor body in side-by-side disposition;
covering by an end plate band a variable gap formed between an outer face of an axially outermost one of the permanent magnets and an inner surface of the recess in an area of the recess which is non-parallel to a side surface of the rotor; and
wrapping a sleeve, made of a glass fiber reinforced tape, around at least part of the lateral surface of the rotor body and/or the outer face of the permanent magnets.

2. The method of claim 1 , wherein the permanent magnets are arranged to prevent the sleeve from intruding during a winding process into a gap between the permanent magnets or into the variable gap.

3. The method of claim 1 , wherein the recess has at least one boundary region which is configured to have at least one area which protrudes deeper into the rotor body.

4. The method of claim 1 , wherein the position extends parallel to a top surface and/or parallel to a base surface around the lateral surface of the rotor body.

5. The method of claim 1 , wherein the sleeve is configured as a bandage.

6. The method of claim 1 , wherein the position is selected approximately at half a height of the lateral surface of the rotor body, said permanent magnets being arranged on both sides in a direction of rotation of the rotor body, wherein the variable gap is covered with the end plate band in close proximity to a base surface and/or a top surface of the rotor body.

7. The method of claim 1 , wherein the end plate band is made of a material selected from the group consisting of plastic and metal, said material having only a negligible detrimental effect on a propagation of a magnetic field.

8. The method of claim 1 , wherein the recess has a depth and contour sufficient to establish a constant radius over a length of the rotor body in parallel relationship to the axis of rotation, after applying the sleeve.

9. A rotor produced by the method of claim 1 .

10. A spindle produced by a method of claim 1 .

11. A rotor, comprising:
a rotor body having a recess;
permanent magnets arranged in the recess such that a variable gap is formed between an end face of an axially outermost one of the permanent magnets and an inner surface of the recess in an area of the recess which is non-parallel to a side surface of the rotor;
an end plate band configured to cover the variable gap; and
a sleeve made of a glass fiber reinforced tape wrapped around an outer periphery of the permanent magnets, the end plate band and at least part of the lateral surface of the rotor body.

12. The rotor of claim 11 , wherein the recess for the permanent magnets has a contour sufficient to arrange the permanent magnets at an incline of the rotor toward one side.

13. An electric machine, comprising a rotor comprising a rotor body having a recess, permanent magnets arranged in the recess such that a variable gap is formed between an end face of an axially outermost one of the permanent magnets and an inner surface of the recess in an area of the recess which is non-parallel to a side surface of the rotor, an end plate band configured to cover the variable gap, and a sleeve made of a glass fiber reinforced tape wrapped around an outer periphery of the permanent magnets, the end plate band and at least part of the lateral surface of the rotor body.

14. The electric machine of claim 13 constructed as a permanently excited synchronous machine.

Assignees

• Siemens Ag

Inventors

• Geis Peter
• Glück Marko
• Knorre Björn
• Kraus Andreas
• Martin Jürgen
• Sterzinger Melanie
• Streit Dietmar
• Then Juliane

Classifications

• H02K1/278 Primary

  Surface mounted magnets; Inset magnets · CPC title

• H02K15/03

  having permanent magnets · CPC title

• H02K1/28 Primary

  Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures · CPC title