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rotor armature for electric motor

A motor and rotor technology, applied in the field of rotor armature, can solve the problems of hysteresis loss and energy consumption

Active Publication Date: 2017-06-09
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] If an electrically conductive material is magnetized alternately, hysteresis losses arise, in which energy must be expended for the varying alignment of the internal basic structure

Method used

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  • rotor armature for electric motor
  • rotor armature for electric motor
  • rotor armature for electric motor

Examples

Experimental program
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Effect test

Embodiment Construction

[0038] Such as figure 1 It is known that the armature 1 (rotor) of the electric motor 2 comprises a rotor armature 13 with an associated armature plate 3 which is arranged on the armature shaft 4 . Over its entire length, the supply channel 5 is designed as a hollow shaft. The hollow shaft is mounted rotatably by means of bearings 15 .

[0039] The coolant inlet 22 of the supply channel 5 communicates with the coolant inlet 6 of the inlet-side region 7 of the stator structure. The inlet-side region 7 of the stator structure can be used here to accommodate a transmission (not shown).

[0040] In case the supply channel 5 runs through, the coolant outlet 8 of the supply channel 5 communicates with the downstream region 9 of the stator structure. The supply channel 5 thus connects the coolant inlet 6 of the inlet-side region 7 of the stator structure with the coolant outlet 10 of the downstream region 9 of the stator structure.

[0041] At the end of the supply channel 5 upst...

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PUM

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Abstract

The invention relates to a rotor armature for an electric motor (2), comprising: axially arranged supply channels (5) for supplying coolant; at least one to the spaced apart cooling channel (27), which is connected to the supply channel (5) via a radial connection (23); the cooling channel outlet (31) for discharging the supplied coolant, wherein the The cooling channel outlet (31) has a radial distance from the supply channel (5).

Description

technical field [0001] The invention relates to a rotor armature for an electric motor, in particular a rotor armature with cooling channels. Furthermore, the invention relates to an electric motor in which the rotor armature is cooled with a coolant. Background technique [0002] In electric drives designed for high rotational speeds, frequency-dependent eddy current losses and hysteresis losses make up a significant share of the total losses of the electric motor. Eddy currents are induced by the alternating polarity of the external field due to the alternating magnetization in the rotor armature formed by the layered laminations. The speed-dependent eddy currents cause losses in the rotor armature which generate heat. [0003] If the electrically conductive material is magnetized alternately, hysteresis losses occur, in which energy must be expended for the variable alignment of the inner basic structure. Due to the resulting alternating magnetization, heat is released...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/32H02K9/19
CPCH02K1/32H02K9/197
Inventor T.海德
Owner ROBERT BOSCH GMBH