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rotor for motor

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

Active Publication Date: 2021-01-29
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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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

The invention relates to a rotor for an electric machine (24), the rotor having a rotor shaft (2), a winding frame (3) coupled to the rotor shaft (2) in a non-rotatable manner, and at least one winding frame (3) arranged on the winding frame ( 3) windings (15) or squirrel cages (4) arranged on the winding former (3), wherein the rotor (1) has at least one heat pipe (7, 19) extending at an angle to the rotor axis (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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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/32H02K9/20
CPCH02K1/32H02K9/225H02K1/24H02K3/24H02K17/168H02K17/16H02K7/003
Inventor K·韦伯
Owner AUDI AG