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Rotor for an electric machine

A rotor and rotor shaft technology, which is applied in the direction of asynchronous induction motors, electric components, electromechanical devices, etc., can solve problems such as the limitation of heat conduction capacity of laminated stacks, achieve improved radial heat transfer, increase cooling power, and increase working capacity/power Effect

Active Publication Date: 2019-02-12
AUDI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the cooling solution via the rotor shaft is that most of the heat to be removed is generated away from the rotor shaft
The amount of heat that can be dissipated is therefore limited by the thermal conductivity of the stack

Method used

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  • Rotor for an electric machine
  • Rotor for an electric machine
  • Rotor for an electric machine

Examples

Experimental program
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Effect test

Embodiment Construction

[0026] figure 1 A rotor 1 for an electric machine is shown. figure 2 A section along dashed line 13 is shown. The rotor has a winding former 3 , which is, for example, a laminated core arranged in a rotationally fixed manner on the rotor shaft 2 . The winding former 3 carries a squirrel cage 4 as a winding, which is formed from a plurality of rods 5 which are arranged in axial recesses of the winding former 3 . The rods 5 are connected at the ends of the bobbin 3 via short-circuit rings 6 . Corresponding rotor configurations are known in particular in the field of asynchronous machines and will therefore not be described in detail.

[0027] During use of the rotor 1 in an electrical machine, the rotor heats up especially in the region of the windings or the squirrel cage 4 and in the edge region of the laminated core, since eddy currents are induced in this region due to the alternating field. The working ability of the motor will be limited due to the temperature rise. ...

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PUM

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Abstract

A rotor 24 for an electric machine having a rotor shaft 2, a winding support 3 coupled to the rotor shaft 2 in rotationally fixed manner, and at least one winding 15 arranged on the winding support 3or a squirrel cage 4 arranged on the winding support 3, wherein the rotor includes at least one heat pipe 17, 19 running at an angle to the rotor shaft 2.

Description

technical field [0001] The invention relates to a rotor for an electric machine having a rotor shaft, a winding frame coupled to the rotor shaft in a rotationally fixed manner, and at least one winding arranged on the winding frame or a squirrel cage arranged on the winding frame. The invention also relates to an electric machine and a motor vehicle. Background technique [0002] Electric motors are increasingly being used as drives in motor vehicles. Here as well as in other fields of application of electric machines, the operating capacity, in particular the continuous operating capacity, of the electric machine is often limited by the inability to dissipate sufficient heat from the rotor. In this case, it should basically be achieved that the dissipated heat from the rotating rotor, mainly in the rotor lamination stack, in the squirrel cage in the case of asynchronous machines or in the rotor winding in the case of separately excited synchronous machines . Cooling can ...

Claims

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Application Information

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IPC IPC(8): H02K1/32H02K9/20
CPCH02K1/32H02K9/225H02K1/24H02K3/24H02K17/168H02K17/165H02K17/16H02K7/003
Inventor K·韦伯
Owner AUDI AG