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Cooling device for motor

A technology for cooling devices and cooling components, which is applied in the direction of cooling/ventilation devices, electromechanical devices, electrical components, etc., and can solve problems such as poor cooling effect and reduced electromagnetic performance of motors

Active Publication Date: 2019-11-05
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a cooling device for the motor in order to reduce the defects in the prior art that the radial cooling method of the motor reduces the electromagnetic performance of the motor and the cooling effect of the axial cooling method of the motor is poor. enclosed motor

Method used

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  • Cooling device for motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] The invention provides a cooling device for a motor, such as Figure 1-4 As shown, the motor includes an inner stator 10 , an outer rotor 20 and an air gap 30 between the inner stator 10 and the outer rotor 20 , and the inner stator 10 includes a stator core 101 and a stator winding 102 . Along the axial direction of the motor, the stator core 101 includes a first axial section 103 and a second axial section 104, the first axial section 103 adopts radial cooling, the second axial section 104 adopts axial cooling, and the cooling medium All are air. In other alternative implementations, air is not limited to be used as the cooling air 114 , and other gases capable of cooling may also be used.

[0104] The cooling device of the motor includes a first cooling assembly 40 and a second cooling assembly 50 . The first cooling assembly 40 is arranged on the first axial section 103, and is used to form a first cooling channel to pass through the cooling air 114. The first coo...

Embodiment 2

[0127] The structure of this embodiment is basically the same as that of Embodiment 1, except that the structure of the second cooling assembly 50 is different, and the cooling medium of the second cooling assembly 50 is different.

[0128] Such as Figure 5 As shown, the second axial section 104 is cooled by liquid cooling, and the cooling medium is liquid. The second cooling assembly 50 includes a plurality of axial ventilation passages 1041 and a plurality of liquid cooling tubes 505, the plurality of liquid cooling tubes 505 are arranged at intervals along the circumferential direction of the motor, and the plurality of liquid cooling tubes 505 are passed through the corresponding axial ventilation channels. Inside Road 1041. Any liquid cooling pipe 505 is a U-shaped pipe structure, which facilitates the flow of cooling liquid, and any liquid cooling pipe 505 includes two cooling sections 5051 arranged in two adjacent axial air ducts 1041 and used to connect and communica...

Embodiment 3

[0131] The structure of this embodiment is basically the same as that of Embodiment 1, except that the structure of the third stack 1043 is different and the shape of the liquid cooling tube 505 is different.

[0132] Such as Figure 6 As shown, the length of the yoke of the third lamination set 1043 is smaller than the length of the yoke of the second lamination set 1042 , and the axial ventilation channel 1041 is disposed inside the third lamination set 1043 . The axial direction of the connecting section 5052 is parallel to the axial direction of the cooling section 5051 .

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Abstract

The invention discloses a cooling device for a motor. The motor comprises an inner stator, an outer rotor and an air gap. The inner stator comprises a stator core, and the stator core comprises a first axial section and a second axial section in the axial direction of the motor. The cooling device of the motor comprises a first cooling assembly and a second cooling assembly, wherein the first cooling assembly is used for cooling the first axial section and comprises an air gap and a radial ventilation groove, and a cooling medium flows in the radial ventilation channel in the radial directionof the motor; the second cooling assembly is used for cooling the second axial section and comprises an axial ventilation channel, and the cooling medium flows in the axial ventilation channel in theaxial direction of the motor. By setting two different cooling modes in the same motor, the problems that only radial cooling is set to reduce the electromagnetic performance of the motor and only axial cooling is set to cause poor cooling effect of the motor are reduced, and the two cooling modes are matched for use to reduce the reduction of the electromagnetic performance of the motor while achieving better cooling effect of the motor.

Description

technical field [0001] The invention relates to a cooling device for a motor. Background technique [0002] When the motor is running, the heat generated by ohmic resistance, ferromagnetic hysteresis, etc. must be effectively dissipated to ensure the effectiveness of the various components of the motor. Heat dissipation through the outer surface of the motor to the outside air is a common cooling method for small motors, but it is not feasible for large motors. This is because the ratio of heat production to heat dissipation area of ​​a large motor is much higher than that of a small motor, and greater heat production also means that there is a larger temperature gradient between the inside of the motor and the outside world. For large motors, especially large wind turbines, air cooling is still a relatively common cooling method. [0003] The stator includes a stator core and a stator winding. Usually, the purpose of cooling the motor, especially the stator, is achieved b...

Claims

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Application Information

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IPC IPC(8): H02K9/04
CPCH02K9/04
Inventor 吴立建闻汇施杨崔明王伶俐方攸同
Owner ZHEJIANG UNIV
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