Unlock instant, AI-driven research and patent intelligence for your innovation.

Cooling end cover of permanent magnet motor

A technology for permanent magnet motors and end caps, which is applied to electrical components, electromechanical devices, electric components, etc., and can solve problems such as loss of magnetism and high heat generation

Inactive Publication Date: 2016-11-30
GUANGXI UNIV
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the permanent magnet traction motor used in rail transit usually has a power of more than 500KW and generates a lot of heat, the permanent magnet material in the motor rotor may lose its magnetism under severe conditions such as high temperature.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cooling end cover of permanent magnet motor
  • Cooling end cover of permanent magnet motor
  • Cooling end cover of permanent magnet motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The cooling end cover of a permanent magnet motor contains at least one semi-conductor refrigerating plate with the same size as the end cover.

[0021] The end cover includes an inner cooling fin 1 , an inner semiconductor cooling fin 2 , a middle support plate 3 , an outer semiconductor cooling fin 4 and an outer cooling fin 5 from the inner side of the motor to the outer side.

[0022] The bearing seat 6 of the motor bearing is installed at the center of the circle of the middle supporting plate 3 .

[0023] The surfaces of the inner peltier refrigerating sheet 2 and the outer peltier refrigerating sheet 4 are all coated with silicone grease.

[0024] The inner heat sink 1 , the middle support plate 3 and the outer inner heat sink 1 are fixed to the motor casing by bolts.

[0025] A plurality of heat dissipation ribs 8 are provided on the inner side of the heat sink 1 close to the inside of the motor and the side of the outer inner heat sink 1 close to the outside o...

Embodiment 2

[0028] Assuming that the actual power of a permanent magnet synchronous motor is 300kw, the iron loss generated on the rotor is 1% of the power, that is, 3kw. Assuming that all the heat generated is transmitted through the end cover, the cooling power of the semiconductor cooling chip is 3kw. If the COP energy efficiency ratio of the semiconductor cooler is 80%, the input power of the semiconductor cooler is 3.75kw, and the heat discharged is 6.75kw. The temperature difference between the two ends of the end cap is about 30°. With the advancement of science and technology, especially the development of material science, the iron loss of permanent magnet motors will gradually decrease, and the COP value of semiconductor refrigeration chips will increase. There is a lot of room for development in motor endshields with refrigeration.

[0029] working principle:

[0030] When the motor is running, the heat of the rotor of the motor is transferred to the space inside the motor t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a cooling end cover of a permanent magnet motor. The end cover contains at least one semiconductor refrigeration plate with the same size as the end cover. The end cover comprises an inner side cooling fin, an inner side semiconductor refrigeration plate, a middle supporting flat plate, an outer side semiconductor refrigeration plate and an outer side cooling fin which are arranged in sequence from the inner side to the outer side of the motor. According to the end cover, transfer of heat in the motor to outside of the motor can be accelerated to achieve the purpose of cooling a motor rotor.

Description

technical field [0001] The invention relates to a non-transmission end cover of an electric motor, in particular to a method of actively transferring the heat generated by the inner rotor of the motor to the outside of the motor by installing semiconductor cooling fins and heat sinks at both ends of the original end cover and inputting electric energy from the outside. . Background technique [0002] The permanent magnet synchronous motor has high power factor and high efficiency, and gradually replaces the AC asynchronous motor in many occasions. At present, a few developed countries have begun to use permanent magnet synchronous traction motors as the power source for high-speed railways. In order to prevent water, dust, iron filings, etc. from corroding the permanent magnet inside the motor, the permanent magnet motor adopts a fully enclosed structure. Since the permanent magnet traction motor used in rail transit usually has a power of more than 500KW and generates a l...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02K5/18
CPCH02K5/18
Inventor 贺德强张焕刘旗扬苗剑
Owner GUANGXI UNIV