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Liquid-cooled electric machine and method for cooling such electric machine

A cooling coil and air cooling technology, applied in the direction of cooling/ventilation devices, electromechanical devices, electrical components, etc., can solve the problems of motor diameter and weight, limited heat conduction, and uncooled rotors, etc., to achieve compact structure and high efficiency The effect of cooling, simple configuration and fabrication

Active Publication Date: 2009-10-14
LIEBHERR COMPONENTS BIBERACH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cooling pipes are made of plastic material, thus this significantly limits the heat transfer
The problem still remains in these cooling pipes embedded in the winding heads that the rotor itself remains more or less uncooled
However, this has adverse effects on the diameter and weight of the motor

Method used

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  • Liquid-cooled electric machine and method for cooling such electric machine
  • Liquid-cooled electric machine and method for cooling such electric machine
  • Liquid-cooled electric machine and method for cooling such electric machine

Examples

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Embodiment Construction

[0031] figure 1 The illustrated electric machine 20 comprises a shaft 1 with a rotor 2 which is rotatably mounted on end shields 4 and 5 which form part of a machine housing 21 and / or on the end faces thereof A closing jacket 22 surrounds the stator 6 of the machine 20 . The jacket 22 includes a jacket cooling device 9 through which a cooling liquid or liquid cooling circuit 23 circulates. The jacket is seated on the stator core without any horizontal and / or planar gaps, so that a good heat transfer from the stator 6 to the cooling jacket is achieved.

[0032] In addition to the liquid cooling circuit 23 described, the cooling device 24 of the electric machine 20 comprises an air cooling device 25 for cooling the winding ends 8 which protrude on both sides of the stator 6 and the rotor 2 from the housing 21 , more precisely, protrudes into the winding end space 26 defined by the jacket 22 and the end shields 4 and 5 . Such as figure 1 As shown, the stator 6 comprises a win...

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PUM

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Abstract

The present invention relates to a liquid-cooled electric machine and a method for cooling such an electric machine. In the electric machine, a rotor and a stator winding are accommodated, wherein thestator winding includes winding heads arranged on opposite sides each in a winding head space, and with a cooling device which includes a liquid cooling circuit with a stator jacket cooling and cooling coils as well as a fan connected with the rotor for circulating air in the machine housing. The invention furthermore relates to a method for cooling such electric machine. In accordance with the invention the machine is provided that the cooling coils extend through the winding head spaces outside the winding heads and the fan includes two fan wheels each associated to a winding head space forgenerating an air flow circulating inside each winding head space, which by means of air duct and / or guiding means in the respective winding head space is circularly passed over the exposed cooling coils and through the winding heads.

Description

technical field [0001] The invention relates to an electrical machine with a housing in which a rotor and a stator winding are accommodated, wherein the stator winding comprises winding ends arranged on opposite sides in a winding head space, respectively; and a cooling device, It comprises a liquid cooling circuit with stator jacket cooling, a cooling coil and a fan connected to the rotor for circulating air in the casing. The invention further relates to a method for cooling such an electric machine. Background technique [0002] Certain types of motors are usually cooled by surface cooling or open circuit cooling with forced or self-ventilation. Medium-performance machines installed in installations with small assembly spaces or in areas where heating and cooling air for motors are not desired, and tractors installed in limited spaces require high-performance cooling systems. Various cooling variants can be used. [0003] Jacket cooling of the stator core can be done e...

Claims

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Application Information

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IPC IPC(8): H02K9/19H02K9/04
CPCH02K3/24H02K9/08H02K9/19H02K9/12H02K9/04H02K5/203
Inventor 克劳斯·格拉纳约翰·利斯
Owner LIEBHERR COMPONENTS BIBERACH GMBH
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