CN2922263Y - Brushless DC electric motor stator punching - Google Patents
Brushless DC electric motor stator punching Download PDFInfo
- Publication number
- CN2922263Y CN2922263Y CN 200620043616 CN200620043616U CN2922263Y CN 2922263 Y CN2922263 Y CN 2922263Y CN 200620043616 CN200620043616 CN 200620043616 CN 200620043616 U CN200620043616 U CN 200620043616U CN 2922263 Y CN2922263 Y CN 2922263Y
- Authority
- CN
- China
- Prior art keywords
- stator
- slot
- punching
- stator punching
- brushless
- 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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- Iron Core Of Rotating Electric Machines (AREA)
- Brushless Motors (AREA)
Abstract
The utility model discloses a brushless DC electric motor stator punching, the aim of which is to overcome the problems of fewer numbers of stator punching slot but more numbers of stator slot, causing large torque pulse action and iron loss. The technical proposal of the utility model opens a punching small slot in symmetry of central axes on top of the stator punching, such that the numbers stator slot of electric motor is reduced and the number of the stator punching slot is increased, therefore, the numbers of physical slot is added, magnetic flux is reduced and pull force of the tooth slot is reduced in rotation for the relation of stator tooth and the rotor magnetic pole, while the winding is added due to the corresponding reduction of proportion of slot insulation. The benefits are that the rotating frequency reduces the iron loss, and the winding resistance reduces and the copper loss reduces, thereby improving efficiency of the electric motor.
Description
Technical field
The utility model relates to a kind of stator punching of brushless DC motor, this stator punching can be folded riveting and become the stator core tooth unit, can number of turn coiling in accordance with regulations become an independently stator tooth unit on this stator core tooth unit.
Background technology
At present electric bicycle, the employed motor of battery-operated motor cycle, it is maximum that their stator is used is 20 pairs of utmost points of 36 grooves.They stator adopted is whole punching, also be winding original paper of per tooth.Its advantage of motor of this groove number and number of pole-pairs is because the groove number is more, and the poor pulling force of tooth is less relatively; But it is many more that shortcoming is a number of pole-pairs, and frequency is high more, can make that like this torque pulsation is bigger than normal, and iron loss is also higher, particularly serious especially when the rotating speed of motor is higher.In addition, because the stator laminating structure of this motor is all-in-one-piece, thereby the still difficulty that rolls off the production line, copper factor can not improve, and winding resistance is bigger than normal.Applied for the utility model patent of a key name for " the energy-efficient external rotor brushless DC motor of a kind of new type electric bicycle " before the applicant, the motor in this patent has adopted the stator laminating structure of separately loading.What the stator of the brushless DC motor of this separately loading adopted is 11 pairs of levels of 24 grooves, on each tooth around the structure of a coil part.But 24 grooves are still on the low side, and 11 pairs of utmost points are still bigger than normal.The utility model is the modified model patent application in original patent application.
Summary of the invention
For the stator punching groove number that overcomes brushless DC motor in the above-mentioned patent application on the low side to defective extremely bigger than normal, the utility model has been released a kind of follow-on technical scheme, this technical scheme is such: the top of the stator punching of brushless DC motor is symmetry with the axis, has a stator punching sulculus; The shape of stator punching sulculus can be triangle, rectangle or other geometries; This punching can be folded riveting and be become the stator core tooth unit; Can number of turn coiling on demand become an independently stator tooth unit on this stator core tooth unit.
Adopt the brushless DC motor of the utility model stator punching, what its stator adopted is the structure of 7 pairs of utmost points of 18 grooves, owing to added two stator punching sulculuses on each stator punching, makes the groove number increase twice, from the effect of magnetic circuit, 18 grooves are equivalent to 54 grooves like this.Magnetic flux becomes originally 1/3 during rotation, and corresponding teeth groove pulling force also becomes original 1/3; And the groove area of laying winding reduces to increase owing to the ratio of slot liner relatively.Brought 4 benefits like this:
1, owing to the minimizing of number of pole-pairs, frequency also reduces during rotation, and iron loss descends;
2, owing to the minimizing of practical number of slots, slot liner area occupied ratio reduces, and the groove area of laying winding increases, and can use relatively thick lead, and winding resistance descends, and copper loss is reduced;
3, owing to the increase of physical slot number, the teeth groove pulling force also can reduce during rotation;
4, can improve the efficient 4%-5% of brushless DC motor.
Description of drawings
Figure one is the front view of the stator punching of a kind of brushless DC motor of the utility model;
Figure two is that the folded riveting of the stator punching of a kind of brushless DC motor of the utility model becomes the stator core tooth unit, and has twined the generalized section of the stator tooth unit after the coil;
Mark is described as follows among the figure:
1---the stator punching of brushless DC motor;
101---stator punching sulculus one;
102---stator punching sulculus two;
2---the stator tooth unit coil;
Embodiment
Adopt the brushless DC motor of the utility model stator punching, use be the structure of 7 pairs of utmost points of 18 grooves.Added on each stator punching 1 that two stator punching sulculuses are respectively 101 stator punching sulculuses one and 102 stator punching sulculuses two, make the groove number increase twice.From the effect of magnetic circuit, 18 grooves are equivalent to 54 grooves like this.Magnetic flux becomes original 1/3 during rotation.Corresponding teeth groove pulling force also becomes original 1/3.And the groove area of laying winding reduces to increase owing to the ratio of slot liner relatively.The stator punching of brushless DC motor can become the stator core tooth unit by some folded rivetings as required; In accordance with regulations number of turn coiling 2 on the stator core tooth unit again becomes an independently stator tooth unit; Become a complete stator by 18 stator tooth unit splicings that wind line again.
Claims (4)
1, a kind of stator punching of brushless DC motor is characterized in that: the top of this stator punching is symmetry with the axis, has a stator punching sulculus.
2, the stator punching of a kind of brushless DC motor according to claim 1 is characterized in that: the shape of filling the sheet sulculus can be triangle, rectangle or other geometries.
3, the stator punching of a kind of brushless DC motor according to claim 1 is characterized in that: this punching can be folded riveting and be become the stator core tooth unit.
4, according to the stator punching of claim 1 or 3 described a kind of brushless DC motors, it is characterized in that: can number of turn coiling in accordance with regulations become an independently stator tooth unit on the stator core tooth unit that the folded riveting of this punching becomes, become complete stator by this stator tooth unit splicing again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620043616 CN2922263Y (en) | 2006-07-04 | 2006-07-04 | Brushless DC electric motor stator punching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620043616 CN2922263Y (en) | 2006-07-04 | 2006-07-04 | Brushless DC electric motor stator punching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2922263Y true CN2922263Y (en) | 2007-07-11 |
Family
ID=38254734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620043616 Expired - Fee Related CN2922263Y (en) | 2006-07-04 | 2006-07-04 | Brushless DC electric motor stator punching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2922263Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170180A (en) * | 2011-05-09 | 2011-08-31 | 佛山市顺德区泛仕达机电有限公司 | Novel permanent magnet external rotor motor |
| CN102315700A (en) * | 2011-08-25 | 2012-01-11 | 江苏上骐集团有限公司 | Stator lamination used for alternating-current (AC) permanent magnet servo motor |
| CN102820716A (en) * | 2012-09-05 | 2012-12-12 | 慈溪市顺达实业有限公司 | Stator core |
| CN102957227A (en) * | 2011-08-26 | 2013-03-06 | 德昌电机(深圳)有限公司 | Brushless motor |
-
2006
- 2006-07-04 CN CN 200620043616 patent/CN2922263Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170180A (en) * | 2011-05-09 | 2011-08-31 | 佛山市顺德区泛仕达机电有限公司 | Novel permanent magnet external rotor motor |
| CN102170180B (en) * | 2011-05-09 | 2013-01-23 | 佛山市顺德区泛仕达机电有限公司 | Novel permanent magnet external rotor motor |
| CN102315700A (en) * | 2011-08-25 | 2012-01-11 | 江苏上骐集团有限公司 | Stator lamination used for alternating-current (AC) permanent magnet servo motor |
| CN102957227A (en) * | 2011-08-26 | 2013-03-06 | 德昌电机(深圳)有限公司 | Brushless motor |
| CN102820716A (en) * | 2012-09-05 | 2012-12-12 | 慈溪市顺达实业有限公司 | Stator core |
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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: 20070711 Termination date: 20100704 |