CN2684442Y - Locked groove low power rare earth permanent-magnet brushless DC motor - Google Patents
Locked groove low power rare earth permanent-magnet brushless DC motor Download PDFInfo
- Publication number
- CN2684442Y CN2684442Y CN 200420032656 CN200420032656U CN2684442Y CN 2684442 Y CN2684442 Y CN 2684442Y CN 200420032656 CN200420032656 CN 200420032656 CN 200420032656 U CN200420032656 U CN 200420032656U CN 2684442 Y CN2684442 Y CN 2684442Y
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- Prior art keywords
- rare earth
- motor
- earth permanent
- utility
- locked groove
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- 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 discloses a locked groove low power rare earth permanent-magnet brushless DC motor, which is mainly composed of a stator and the rotor of an excitation pole formed by rare earth permanent magnet. The utility model is characterized in that ferrite flux sleeve is covered on the drop directional surface of a stator coil. The utility model can eliminate slot effect, reduce torque ripple of the motor in operation, and improve electric efficiency.
Description
The utility model belongs to magneto and makes the field.
Present magneto, behind shaping stator iron core, around stem stem setting-in stator coil winding, after the coil windings installation, direct and rotor forms machine operation.There is such shortcoming in such structure: because inconsistent on geometry and permeability of stem stem and coil influences the magnetic field homogeneous between rotor and stator, thereby the slot effect of causing and reduce torque ripple in the motor rotation causes electric efficiency lower.
In view of the above shortcoming of prior art, the purpose of this utility model is a kind of brushless, permanently excited direct current motor of design, makes it to overcome the above shortcoming of prior art, overcomes slot effect, improves electric efficiency.
The purpose of this utility model is to realize by following design.
Locked groove small-power rare earth permanent magnetic brushless dc motor, mainly the rotor that constitutes field pole by stator, by rare earth permanent magnet is formed, and is covered with the ferrite flux sleeve on the surface of the direction that rolls off the production line of stator coil.
After adopting design as above, the utility model can be eliminated slot effect, reduces torque ripple and leakage field in the motor rotation, improves electric efficiency about 25%.
Description of drawings is as follows:
Fig. 1 is a cutaway view of the present utility model.
Fig. 2 is the cutaway view of another embodiment of the utility model.
Below in conjunction with accompanying drawing structure of the present utility model is described in further detail.
Can see that in Fig. 11 is p-m rotor, 2 is stator core, and 3 is the stator coil winding around stem stem 4 setting-ins, and the opening direction of stator stem stem is (stator coil is installed at the inner face near rotor) to the inside; Surface (being inner surface of stator in this example) in the direction that rolls off the production line of stator coil is covered with ferrite flux sleeve 5.
The structure of Fig. 2 and Fig. 1 basically identical, the opening direction of different only is stator core 6 is laterally, is covered with ferrite flux sleeve 7 on the surface (being the outer surface of stator away from rotor in this example) of the direction that rolls off the production line of stator coil.
Embodiment 1
Adopt the micro-machine that is exclusively used in the diesel locomotive ventilation blower of Fig. 1 conceptual design, flux sleeve adopts 2 millimeters steel disc, with add flux sleeve before compare, electric efficiency improves 25%.
Adopt basic design of the present utility model, can further improve the power-weight ratio of motor, to the magneto of 0.7KW-10KW, power-weight ratio can reach 0.20-0.25KW/Kg.
Claims (1)
1, locked groove small-power rare earth permanent magnetic brushless dc motor, mainly the rotor that constitutes field pole by stator, by rare earth permanent magnet is formed, and it is characterized in that, is covered with the ferrite flux sleeve on the surface of the direction that rolls off the production line of stator coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420032656 CN2684442Y (en) | 2004-01-30 | 2004-01-30 | Locked groove low power rare earth permanent-magnet brushless DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420032656 CN2684442Y (en) | 2004-01-30 | 2004-01-30 | Locked groove low power rare earth permanent-magnet brushless DC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2684442Y true CN2684442Y (en) | 2005-03-09 |
Family
ID=34607328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420032656 Expired - Fee Related CN2684442Y (en) | 2004-01-30 | 2004-01-30 | Locked groove low power rare earth permanent-magnet brushless DC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2684442Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013778A (en) * | 2010-12-13 | 2011-04-13 | 哈尔滨工业大学 | Permanent magnet synchronous motor with wide field-weakening and speed regulation range |
| CN101005217B (en) * | 2005-12-29 | 2012-04-11 | Lg电子株式会社 | Self-magnetized motor and stator structure thereof |
-
2004
- 2004-01-30 CN CN 200420032656 patent/CN2684442Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005217B (en) * | 2005-12-29 | 2012-04-11 | Lg电子株式会社 | Self-magnetized motor and stator structure thereof |
| CN102013778A (en) * | 2010-12-13 | 2011-04-13 | 哈尔滨工业大学 | Permanent magnet synchronous motor with wide field-weakening and speed regulation range |
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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: 20050309 |