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Cooling structure of inner rotor motor

A technology of inner rotor motor and cooling structure, applied in cooling/ventilation device, magnetic circuit shape/pattern/structure, electromechanical device, etc., can solve problems such as limited space and difficulty, and achieve overall cost reduction, temperature rise suppression, good performance The effect of the stator

Active Publication Date: 2012-12-05
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limited space for installing drive motors in new energy vehicles, it is very difficult to build a cooling system including flow channels for the stator and rotor

Method used

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  • Cooling structure of inner rotor motor
  • Cooling structure of inner rotor motor
  • Cooling structure of inner rotor motor

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Experimental program
Comparison scheme
Effect test

Embodiment 2

[0053] The shape of the third cavity 20c of the second embodiment can be the same as that of the first embodiment, such as Figure 2d Shown; It can also be only a simple tubular shape, so as to be connected with the second cavity 20b.

[0054] In the above two embodiments, the separation design of the cover 13 and the front cover 9 is mainly for the convenience of assembling the heat conducting rod 11 . Alternatively, the cover 13 and the front end cover 9 can also be integrated, and at this time the second cavity and the third cavity are both in the integrated front end cover.

[0055] The technical advantages of the cooling structure of the inner rotor motor described in the above two embodiments are:

[0056] 1. Avoid the hidden danger of short circuit inside the motor. This is because the heat conduction chamber 6 is filled with non-conductive heat conduction oil, even if the dynamic seal between the rotor shaft 5 and the heat conduction rod 11 fails slightly, a small am...

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Abstract

The invention discloses a cooling structure of an inner rotor motor. The inner rotor motor comprises a rotor shaft, a rotor section, a stator section, a front end cover and a seal cover. The cooling structure comprises a third cavity arranged between the front end cover and the seal cover, and the third cavity is used as one part of a cooling medium channel. The rotor shaft is internally provided with a heat conduction cavity, an opening of the heat conduction cavity is arranged at one side of the front end cover, and the inner part of the heat conduction cavity is provided with heat conduction media. The first end of a heat conduction rod is arranged in the heat conduction cavity and is contacted with the heat conduction media, the second end of the heat conduction rod is arranged in the third cavity and is contacted with cooling media, and the second end and the front end cover are sealed by adopting a static seal way. The rotor shaft and the heat conduction rod are sealed by adopting a dynamic seal way. The heat of the rotor section and the rotor shaft is transmitted from the first end of the heat conduction rod in the heat conduction cavity to the second end of the heat conduction rod and is dissipated through the cooling media in the third cavity. According to the cooling structure of an inner rotor motor, the good heat dissipating effects of the stator and the rotor are obtained, and meanwhile the strict requirements for insulation, seal and volume are satisfied.

Description

technical field [0001] The present application relates to an inner rotor electric machine. Background technique [0002] According to the relative position between the stator and the rotor, the motor can be divided into two types: inner rotor and outer rotor. The rotor of an inner rotor motor is surrounded by the stator, ie the rotor is inside. The rotor of the outer rotor motor surrounds the stator, that is, the rotor is outside. [0003] At present, the permanent magnet synchronous motor with inner rotor is usually used as the driving motor in new energy vehicles. Due to the limitation of space and the pursuit of high performance, the heating of the stator and rotor of this inner rotor permanent magnet synchronous motor has become a must. question. [0004] In the existing stator cooling structure of the inner rotor motor, a cooling jacket is fixed on the periphery of the stator core in the form of interference fit or transition fit. The cooling jacket is usually made ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K9/19H02K1/32H02K9/22
CPCH02K9/19H02K1/32H02K9/227H02K9/225H02K5/203H02K9/197
Inventor 屈晨竹陈思远
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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