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Pm rotor having radial cooling slots and corresponding method of production

A radial cooling, rotor technology, applied in the manufacture of final products, magnetic circuit rotating parts, sustainable manufacturing/processing, etc., can solve the problem of difficult to effectively cool the rotor, and achieve reliable magnet fixation, large magnetic flux, cooling Efficient effect

Inactive Publication Date: 2009-10-28
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this type of permanent magnet motor is that it is difficult to achieve effective cooling of the rotor

Method used

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  • Pm rotor having radial cooling slots and corresponding method of production
  • Pm rotor having radial cooling slots and corresponding method of production
  • Pm rotor having radial cooling slots and corresponding method of production

Examples

Experimental program
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Embodiment Construction

[0021] The examples to be described in detail below are preferred embodiments of the present invention.

[0022] The main idea of ​​the present invention is to provide a rotor with built-in permanent magnets, the rotor having radial cooling grooves. When carrying out this combination of built-in magnets and radial cooling grooves, the following requirements need to be paid attention to:

[0023] -When installing the magnet, it must be possible to pass the sub-laminated group of the rotor over the cooling groove and push the magnet that needs to be inserted from the outside in the axial direction into position.

[0024] -Before being finally fixed by the encapsulating resin, the magnet must be kept in a centered "suspended" state inside the corresponding laminated sheet group.

[0025] -During the working process, the magnet and resin must be kept fixed in the laminated sheet group.

[0026] -The magnetic plate must not be loose as a whole, and it is also not allowed to disconnect ...

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PUM

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Abstract

The invention relates to a PM rotor having radial cooling slots and to a corresponding method of production. The aim of the invention is to provide a structurally simple rotor which has a high degree of efficiency. According to the invention, the rotor consists a plurality of partial laminated stacks (20) that are interspaced in the axial direction at a defined distance, thereby defining radial cooling slots (22). Permanent magnets (24) are arranged in every partial laminated stack (20) in inner pockets (23). The dimensions of every permanent magnet (24) in the axial direction does not or only insignificantly exceed the axial dimensions of the respective partial laminated stack (20). During assembly, the permanent magnets (24) can be axially pushed through the inner pockets (23) to the respective partial laminated stack (20). The invention allows to provide a rotor comprising radial cooling slots and inner permanent magnets which has a very high degree of efficiency.

Description

Technical field [0001] The invention relates to a motor rotor with a plurality of laminated fin groups, which are spaced apart from each other by a certain distance in the axial direction, thereby forming a radial cooling groove. In addition, the present invention also relates to a method of manufacturing such a rotor. Such rotors can be used in electric motors or generators. Background technique [0002] The high-speed wind generators currently used are all slip ring rotor motors with radial cooling grooves. Figure 1 illustrates this motor in a partial cross-sectional view. The generator 1 has a rotor 2 of which the laminated core is segmented in the axial direction. The individual sub-laminate groups 3 form a total laminate group on the shaft 4. The sub-laminate groups 3 are spaced apart from each other by a certain distance, thereby forming a radial cooling groove 5. [0003] The shaft 4 is equipped with a slip ring unit 6 at its end located on the opposite side of the drive e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K1/32F03D9/00H02K7/18
CPCH02K1/32H02K7/1838Y02E10/725H02K7/1807H02K1/276F03D9/002H02K7/183F03D9/25Y10T29/49012Y02E10/72Y02P70/50
Inventor 安德烈亚斯·约克尔托马斯·施密特
Owner SIEMENS AG