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

Brushless motor

A brushless motor and motor shaft technology, which is applied in the direction of electrical components, electromechanical devices, electric components, etc., can solve the problems of motor overheating, affecting normal use, high power, etc., and achieve the effect of improving motor performance and ensuring normal use

Inactive Publication Date: 2009-02-25
姜卫亮 +1
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of repeated experiments, the applicant found that because these devices require large power and small size, and the brushless motors in them are only cooled by natural cooling at present, the normal use is often affected by the overheating of the motors.

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
  • Brushless motor
  • Brushless motor
  • Brushless motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 , 2 , 3, and 4, a brushless motor includes a motor shaft 1 and a casing 3, the motor shaft 1 passes through the inside of the casing 3, and a bearing 6 is arranged at the matching place with the casing 3, and inside the casing 3 A rotor 5 is installed on the motor shaft 1, and a stator 4 cooperating with the rotor 5 is installed on the casing 3. An internal cooling air passage 7 is opened inside the stator 4, and an air inlet 8 and an air outlet are respectively opened at both ends of the casing 3. The air outlet 9 or an air inlet and an air outlet are respectively opened on the front and rear sides of the casing 3 , and at least one cooling fan 2 is installed on the motor shaft 1 in the casing 3 . A fan bearing 10 is arranged between the cooling fan 2 and the motor shaft 1 .

[0022] In this embodiment, a cooling fan 2 is adopted, which is installed in front of the stator 4 in the casing 3 . It is also possible to use only one rear cooling fan insta...

Embodiment 2

[0024] Such as Figure 5 , 6 , 7, and 8, two cooling fans 2 are used in this embodiment, one is installed in front of the stator 4 in the casing 3, and the other is installed behind the outside of the casing 3. The cooling fan 2 inside the casing 3 utilizes the inner cooling air passage 7 as the air passage, and the cooling fan 2 outside the casing 3 utilizes the outer space of the casing 3 as the air passage. Compared with Embodiment 1, this embodiment is a simultaneous internal and external ventilation structure, which further improves the ventilation and cooling effect, but also increases the cost.

[0025] During use, under the rotation of the two cooling fans 2, the external air continuously passes through the inside and outside of the casing 3 simultaneously, continuously taking out the heat inside the motor to achieve a good heat dissipation effect.

[0026] The invention patent is applicable to various DC and AC 1.5V-500V brushless motors.

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 brushless electric motor, which comprises a motor shaft and a casing. The motor shaft passes through the inner part of the casing; a bearing is arranged in a matching position between the motor shaft and the casing; a rotor is arranged on the motor shaft inside the casing; a stator matched with the rotor is arranged on the casing; an internal cooling windhole is opened inside the stator; an air inlet and an air outlet are respectively opened at the two ends of the casing or the air inlet and the air outlet are respectively opened on the front side and the rear side of the casing; at least a cooling fan is arranged on the motor shaft. In the brushless electric motor, the cooling windhole is opened inside the stator and the cooling fan is adopted to rapidly cool the internal environment of the electric motor, thereby meeting the rapid cooling need of the equipment with high-power and small volume and ensuring the normal service of the equipment. The experiment is stopped when the surface temperature of the electric motor reaches more than 120 DEG C after no-load running for 20 minutes without ventilation cooling, and the surface temperature of the electric motor provided with the cooling fan only reaches 50 DEG C after no-load running for 1 hour, thereby increasing the performance of the electric motor greatly.

Description

【Technical field】 [0001] The patent of the present invention relates to a brushless motor, in particular to a brushless motor capable of high power output with small volume, rapid cooling and low temperature rise. 【Background technique】 [0002] There is no ventilation cooling device in the current brushless motors, relying on natural cooling, so there are disadvantages such as large volume and low power. The volume of the brushless motor is about 50% larger than that of the current series-excited (series-pole) motor at the same output power. [0003] In the patent application titled "Power source and hand-held electric tools using the power source" submitted by the inventor, the structures of electric tools, garden tools, woodworking tools, DC tools, hand tools, high-pressure cleaners, etc. Improvement has achieved the advantages of prolonging the service life, reducing the difficulty of operation, and improving the control accuracy. In the process of repeated experiments...

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): H02K1/20H02K9/04
Inventor 姜卫亮应时立
Owner 姜卫亮