CN201490783U - outer rotor motor - Google Patents
outer rotor motor Download PDFInfo
- Publication number
- CN201490783U CN201490783U CN2009202092977U CN200920209297U CN201490783U CN 201490783 U CN201490783 U CN 201490783U CN 2009202092977 U CN2009202092977 U CN 2009202092977U CN 200920209297 U CN200920209297 U CN 200920209297U CN 201490783 U CN201490783 U CN 201490783U
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- CN
- China
- Prior art keywords
- outer rotor
- external rotor
- motor
- end cover
- end cap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a motor, in particular to an outer rotor motor, which aims to provide the outer rotor motor with high efficiency, good heat dissipation and good dynamic balancing performance. The outer rotor motor comprises an outer rotor, an inner stator and an end cover, wherein a rotation shaft is arranged in the outer rotor. The utility model is characterized in that the outer rotor is integrally formed and is matched with the rotation shaft in a fastening mode; and the end cover is tightly arranged at one end of the inner stator, the contact point of the inner end of the inner stator and the rotation shaft of the outer rotor is provided with a first bearing, and the outer side of the end cover of the inner stator is provided with a second bearing. With compact structure and small size, the motor is arranged via a flange end cover, the rotor is formed in one step, so the overall structure is more compact, the axial size is significantly reduced, and the stability is good. The motor has no electric wave interference and no electrical spark generated by electric brush friction, is suitable for harsh working environment and explosive hazardous areas, and is suitable for the application occasions of high-frequency quick start and the like.
Description
Technical field
The utility model relates to a kind of motor, particularly a kind of external rotor electric machine.
Background technology
Existing motor product, according to electromagnetic induction principle, stator winding electrifying produces circle or elliptical rotating field, and the cast-in aluminum squirrel cage rotor bar is rotated by cutting magnetic line, and output mechanical power is one of main, the most frequently used power source.General stator is in the rotor outside; rotor is in the inner stressed rotation of stator core, and stator forms the rotating magnetic field of surrounding inner rotator, and its structure belongs to traditional enclosed construction; this structure all has certain shell (as above bottom end cover) usually, to play insulation protection or fixation.The motor product structure more complicated of this structure, to having relatively high expectations of shell, material requested is also more, simultaneously, also wayward, the adjustment of the dynamic balancing of motor, insulation property also are difficult for guaranteeing, and because be closed, heat dispersion is poor, the inner rotator heating is serious, temperature rise is higher, has accelerated product aging, has reduced the useful life of product.Its insulation property must guarantee that tactic pattern causes that Distribution of Magnetic Field is restricted by the physical dimension of shell simultaneously, and leakage field is more, and loss is bigger, can not make full use of its material.
Summary of the invention
The purpose of this utility model provides a kind of efficient height, good heat dissipation, external rotor electric machine that dynamic balance performance is good.
To achieve the above object of the invention, the utility model is achieved in that a kind of external rotor electric machine, comprises external rotor, internal stator, and end cap is provided with rotating shaft in the described external rotor, it is characterized in that: described external rotor is one of the forming, and with the rotating shaft secure fit; Described end cap close-fitting is provided with clutch shaft bearing at an end of internal stator in the inner end and the external rotor rotating shaft contact position of internal stator, is provided with second bearing in the end cap outside of internal stator.Because of its structure through gathering, volume is little; Motor is installed by the flange end cap, and the rotor one-shot forming makes overall structure compact more, and axial dimension reduces significantly.Thereby increased stability.
The outer wall of described external rotor is provided with heat radiating fin.Described external rotor is a cage rotor.
Adopt special cage rotor structure to guarantee to start level and smooth; Starting current is low; The rotating speed height; Noise is low, and outer wall is provided with heat radiating fin simultaneously, and radiating rate is fast.
The working of plastics that described motor is used etc. is fire proofing.
The winding overhang of described internal stator is equipped with the high sensitivity thermal protector; Machine operation temperature-20 ℃～+ 70 ℃ is not burnt for guaranteeing the group of motors overcurrent, at winding overhang the high sensitivity thermal protector is housed.
The back side of described end cap is provided with reinforcement.Be provided with reinforcement on end cap, when guaranteeing end cap intensity and increasing the motor radiating area, the distribution that it is special has also strengthened the balance and the stability of motor rotation.
Description of drawings
Fig. 1 is a profile of the present utility model.
Specific embodiment
In order to illustrate further the novel effect of this reality, the utility model is made into more detailed description below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of external rotor electric machine, by external rotor 1, internal stator 2, end cap 3 constitutes, the cage rotor that described external rotor is one of the forming, the center is provided with rotating shaft 4, this rotating shaft and external rotor secure fit.Described end cap 3 close-fittings are at an end of internal stator 2, and the back side of end cap is provided with reinforcement.Be provided with reinforcement on end cap, when guaranteeing end cap intensity and increasing the motor radiating area, the distribution that it is special has also strengthened the balance and the stability of motor rotation.In the inner end of internal stator 2, external rotor and rotating shaft contact position are provided with clutch shaft bearing, are provided with second bearing in the end cap outside of internal stator.
In such scheme,, can on the outer wall of described external rotor, be provided with heat radiating fin 11 for the heat radiation that is listed as.In order to be allowed to condition under the safer environment work, at the winding overhang of described internal stator high sensitivity thermal protector 7 is housed, guarantee that the machine operation temperature is between-20 ℃～+ 70 ℃.And the working of plastics that motor is used etc. is fire proofing, can allow work safer like this.
Motor of the present utility model can guarantee it in the torque characteristics excellence, in, the low speed torque performance is good, detent torque is big, overload capacity is strong; Rotor moment of inertia is little, fast response time; Volume is little, in light weight, power ratio (being the ratio of power, volume) big; Braking characteristic is good; The efficient height does not have the mechanical loss that rubs between exciting power and carbon brush, the slip ring, is energy-conserving product; Simple in structure, reliability is high, good stability, strong adaptability, maintenance and maintenance are simple; The anti-vibrations of jolting, noise is low, shakes littlely, and running is level and smooth, and the life-span is long; Do not have wave interference, the electric spark that does not have brush friction to produce is particularly suitable for the explosion risk zone; Be suitable for abominable working environment, be suitable for high frequency and the application scenario such as start fast.
Claims (5)
1. an external rotor electric machine comprises external rotor, internal stator, and end cap is provided with rotating shaft in the described external rotor, it is characterized in that: described external rotor is one of the forming, and with the rotating shaft secure fit; Described end cap close-fitting is provided with clutch shaft bearing at an end of internal stator in the inner end and the external rotor rotating shaft contact position of internal stator, is provided with second bearing in the end cap outside of internal stator.
2. according to the described a kind of external rotor electric machine of claim 1, it is characterized in that: the outer wall of described external rotor is provided with heat radiating fin.
3. according to the described a kind of external rotor electric machine of claim 1, it is characterized in that: described external rotor is a cage rotor.
4. according to the described a kind of external rotor electric machine of claim 1, it is characterized in that: the winding overhang at described internal stator is equipped with the high sensitivity thermal protector.
5. according to the described a kind of external rotor electric machine of claim 1, it is characterized in that: the back side of described end cap is provided with reinforcement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202092977U CN201490783U (en) | 2009-09-07 | 2009-09-07 | outer rotor motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202092977U CN201490783U (en) | 2009-09-07 | 2009-09-07 | outer rotor motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201490783U true CN201490783U (en) | 2010-05-26 |
Family
ID=42429650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202092977U Expired - Fee Related CN201490783U (en) | 2009-09-07 | 2009-09-07 | outer rotor motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201490783U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110798007A (en) * | 2019-11-18 | 2020-02-14 | 沈阳工业大学 | Outer rotor structure of permanent magnet direct-drive wind driven generator |
| CN111600442A (en) * | 2020-05-28 | 2020-08-28 | 浙江大学 | Permanent magnet direct-drive wind driven generator outer rotor and permanent magnet direct-drive wind driven generator |
-
2009
- 2009-09-07 CN CN2009202092977U patent/CN201490783U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110798007A (en) * | 2019-11-18 | 2020-02-14 | 沈阳工业大学 | Outer rotor structure of permanent magnet direct-drive wind driven generator |
| CN111600442A (en) * | 2020-05-28 | 2020-08-28 | 浙江大学 | Permanent magnet direct-drive wind driven generator outer rotor and permanent magnet direct-drive wind driven generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20130907 |