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Electric maschine in a high protection category with improved rotor cooling

A technology of rotors and rotor shafts, applied in cooling/ventilation devices, electromechanical devices, electrical components, etc., to solve problems such as poor receiving cooling efficiency

Active Publication Date: 2011-06-22
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The state of the art often chooses to accept the poor cooling efficiency as there is no known solution to cool the rotor simply and effectively without giving up the high degree of protection IP55

Method used

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  • Electric maschine in a high protection category with improved rotor cooling
  • Electric maschine in a high protection category with improved rotor cooling
  • Electric maschine in a high protection category with improved rotor cooling

Examples

Experimental program
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Effect test

Embodiment Construction

[0034] figure 1 and figure 2 The shown electric machine has a stator 1 . The stator 1 carries a stator winding 2 .

[0035] This electric machine also has a rotor shaft 3 . The rotor shaft 3 is mounted in a rotor shaft bearing 4 . As a result of being mounted in rotor shaft bearings 4 , rotor shaft 3 is rotatable about axis 5 relative to stator 1 .

[0036] Axis 5 can define axial, radial and tangential directions. Wherein, “axial” refers to a direction parallel to the axis 5 . “Radial” refers to the direction perpendicular to the axial direction, including two situations of facing the axis 5 and away from the axis 5 . “Tangential” refers to a direction that is perpendicular to both the axial direction and the radial direction, that is, a direction that surrounds the axis 5 and is separated from the axis 5 by a certain radial distance.

[0037] A rotor 6 is arranged on the rotor shaft 3 . The rotor 6 interacts electrically with the stator 1 . For example, the rotor 6...

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PUM

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Abstract

An electric machine has a stator (1) and a rotor shaft (3). The rotor shaft (3) is rotatably mounted about a shaft axis (5) in relation to the stator (1), said axis (5) defining an axial direction, a radial direction and a tangential direction. A rotor (6), which is in electrical co-operation with the stator (1), is arranged on the rotor shaft (3). The rotor (6) has at least one continuous axial rotor channel (8). The stator (1) has a lamination stack (10) that extends over the rotor (6) when viewed in the axial direction. The lamination stack (10) completely surrounds the rotor (6) when viewed on a sectional plane that is orthogonal to the axial direction, forming a closed inner rotor chamber (11) when viewed on the sectional plane. A respective cover (14) is provided on both axial sides of the lamination stack (10).; At least one of the covers (14) has a central cavity (15) to allow the passage of the rotor shaft (3). The lamination stack (10) has at least one axial stator channel (12') that runs continuously in the axial direction and that is completely closed when viewed on the sectional plane. The covers (14) are designed in such a way that in conjunction with the lamination stack (10) they form at least one radial channel (16) running in the radial direction. The radial channels (16) connect the axial stator channel(s) (12') to the inner rotor chamber (11) by means of a fluid connection but are otherwise closed. To force convection, an element (17) that acts as a fan is located on the rotor shaft (3) axially within the covers (14).

Description

technical field [0001] The invention relates to an electric machine, wherein, [0002] - said electric machine has a stator and a rotor shaft, [0003] - said rotor shaft is mounted rotatably about an axis relative to said stator such that said axis defines axial, radial and tangential directions, [0004] - a rotor is arranged on said rotor shaft, said rotor interacting electrically with said stator, [0005] - said rotor has at least one axially continuous rotor axial channel, [0006] - the stator has a stator lamination stack extending over the entire extent of the rotor, viewed in the axial direction, [0007] - said stator laminations completely surround said rotor, viewed from a section plane orthogonal to said axis, which forms a closed rotor cavity, viewed from said section plane, [0008] -A shroud is installed at both axial ends of the stator stack, [0009] - at least one of said shrouds has a central opening through which said rotor shaft passes, [0010] - ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/20H02K1/32H02K5/20
CPCH02K9/08H02K1/32H02K1/20H02K5/20H02K9/16H02K5/207
Inventor 康拉德·布兰德尔赖纳·格里勒恩贝格尔塞巴斯蒂安·魏斯伊尔卡·阿夫-乌尔西
Owner SIEMENS AG
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