CN201256312Y - Brushless motor - Google Patents
Brushless motor Download PDFInfo
- Publication number
- CN201256312Y CN201256312Y CNU2008202105296U CN200820210529U CN201256312Y CN 201256312 Y CN201256312 Y CN 201256312Y CN U2008202105296 U CNU2008202105296 U CN U2008202105296U CN 200820210529 U CN200820210529 U CN 200820210529U CN 201256312 Y CN201256312 Y CN 201256312Y
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- China
- Prior art keywords
- stator
- brushless motor
- slot
- silicon steel
- rotor
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- Expired - Fee Related
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Abstract
The utility model discloses a brushless motor, which comprises a rotor and a stator, wherein the rotor component is formed by a shaft sleeve and a permanent magnet, a stator core is fixed in a body case to form the stator component. The brushless motor is characterized in that 20 circular permanent magnets are evenly arranged on the periphery of the outer surface of the shaft sleeve according to the mode of N-S-M-S, and 21 coil winding slots are evenly distributed on the inner peripheries of the silicon steel sheets. With the design, the brushless motor reaches the purposes of respectively counting slot windings and reducing slot numbers, and achieves that a centralized coil is wound on each tooth, and then, production cost is lowered, the length of the end portion of an armature coil is shortened, torque pulsation caused by tooth slot benefits is reduced, and the fluctuation of motor operating speed is less.
Description
Technical field
The utility model relates to a kind of electric machine, especially relates to the servo brushless electric machine of a kind of slow-speed of revolution.
Background technology
Along with permanent magnetic material, the control and the development of power electronic technology automatically, brushless electric machine has obtained significant progress, and brshless DC motor has not only kept traditional direct current machine good dynamic and static governor control characteristics, and simple in structure, reliable, be easy to control; Its application develops rapidly to the civilian industry field from initial war industry, in recent years, the brushless direct-current permanent magnet motor is widely used in fields such as audio-visual equipment, computer peripheral and information machinery, especially the current electric bicycle of pressing close to our life most, its power motor also is a brushless electric machine; But because general employing of present electric bicycle motor concentrates that whole permanent magnet has 20 apart from winding, 3 grooves in every corresponding stator silicon steel plate of permanent magnet, pitch is 3, so stator armature will leave 60 grooves; Therefore this structure has caused the teeth groove number of armature stamping many, has increased the shared space of slot liner to a certain extent, has reduced the utilance of materials such as copper iron, because winding overhang length is a pole span, the use amount of copper material is bigger; Simultaneously, this structure makes teeth groove coiling complex process production efficiency low, causes the increase of production cost; The torque fluctuation that slot effect causes is big, causes the velocity perturbation of motor operation course bigger.
Summary of the invention
The purpose of this utility model is at above-mentioned deficiency, and the utilance height of material such as a kind of copper iron, the brushless electric machine that coiling technology is simple, production cost is low, the fluctuation of the motor speed of service is less are provided.
The technical solution of the utility model is: a kind of brushless electric machine, and it comprises rotor and stator, described rotor part is made up of axle sleeve and the permanent magnet that is bonded on the sleeve outer surface; Stator core is fixed on and constitutes described stator component in the casing, and described stator core is formed the winding slot of uniform promising motor windings on the described silicon steel sheet inner periphery by the silicon steel sheet stack.
Further, on the outer surface circumference of described axle sleeve, it is 20 by the uniform conglobate permanent magnet of the mode of N-S-N-S; Uniform winding slot has 21 on the described silicon steel sheet inner periphery.
The beneficial effects of the utility model are: owing to adopt rotor is 20 utmost points, the armature slot number is 21 this structural designs, so just, reached the purpose of fractional slot winding, fractional slot winding makes the teeth groove number of silicon steel sheet reduce, can reduce the shared space of slot liner to a certain extent, improve the utilance of materials such as silicon steel; Concentrating coil of coiling on each tooth, thus the automatic coil winding machine coiling can be adopted, can significantly improve labor productivity, reduce the manufacturing cost of motor; Pitch is 1, can shorten the tip lengths of armature coil significantly, saves copper material; Utmost point groove cooperation the having reduced torque fluctuation that the teeth groove benefit causes, the fluctuation of the motor speed of service is less.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of stator component silicon steel sheet of the present utility model;
Fig. 3 is the structural representation of rotor part of the present utility model;
Among the figure: 1. permanent magnet; 2. axle sleeve; 3. stator core; 4. silicon steel sheet; 5. winding slot.
Embodiment
As among the figure 1, Fig. 2, shown in Fig. 3, a kind of brushless electric machine, it comprises rotor and stator, described rotor part is by axle sleeve 2, permanent magnet 1 is formed, described permanent magnet 1 is by the outer surface of adhering with epoxy resin at axle sleeve 2, on the outer surface circumference of described axle sleeve 2, it is 20 by the uniform conglobate permanent magnet 1 of the mode of N-S-N-S, described axle sleeve 2 is fixed in the rotating shaft, described stator component is fixed in the casing by stator core 3 and constitutes, described stator core 3 is made up of silicon steel sheet 4 stacks, the winding slot 5 of uniform promising motor windings on described silicon steel sheet 4 inner peripherys, uniform winding slot 5 is 21 on described silicon steel sheet 4 inner peripherys; Rotor is 20 utmost points, and the armature slot number is 21, this utmost point groove matching structure design, and pitch is 1, has so just reached the purpose of fractional slot winding, fractional slot winding makes the teeth groove number of silicon steel sheet 4 reduce, i.e. concentrating coil of coiling on each tooth.
Claims (1)
1, a kind of brushless electric machine, it comprises rotor and stator, described rotor is made up of axle sleeve (2) and permanent magnet (1), stator core (3) is fixed on and constitutes described stator in the casing, described stator core (3) is made of silicon steel sheet (4) stack, it is characterized in that: it is 20 that the mode by N-S-N-S of being evenly equipped with on described axle sleeve (2) circumferential outer surface is provided with conglobate permanent magnet (1), the winding slot (5) of uniform promising motor windings is 21 on described silicon steel sheet (4) inner periphery, and pitch is 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202105296U CN201256312Y (en) | 2008-08-31 | 2008-08-31 | Brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202105296U CN201256312Y (en) | 2008-08-31 | 2008-08-31 | Brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201256312Y true CN201256312Y (en) | 2009-06-10 |
Family
ID=40739640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202105296U Expired - Fee Related CN201256312Y (en) | 2008-08-31 | 2008-08-31 | Brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201256312Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789662A (en) * | 2010-03-09 | 2010-07-28 | 福建福安闽东亚南电机有限公司 | Dual-purpose motor driven by permanent magnet hybrid electric vehicle to generate electricity |
| CN112803647A (en) * | 2021-01-29 | 2021-05-14 | 珠海市柏瑞电子有限公司 | Inner rotor brushless DC motor and oxygen-increasing machine |
-
2008
- 2008-08-31 CN CNU2008202105296U patent/CN201256312Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789662A (en) * | 2010-03-09 | 2010-07-28 | 福建福安闽东亚南电机有限公司 | Dual-purpose motor driven by permanent magnet hybrid electric vehicle to generate electricity |
| CN112803647A (en) * | 2021-01-29 | 2021-05-14 | 珠海市柏瑞电子有限公司 | Inner rotor brushless DC motor and oxygen-increasing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090610 Termination date: 20170831 |