CN2485864Y - Brushless D.C. motor with fractional slots - Google Patents
Brushless D.C. motor with fractional slots Download PDFInfo
- Publication number
- CN2485864Y CN2485864Y CN 01244472 CN01244472U CN2485864Y CN 2485864 Y CN2485864 Y CN 2485864Y CN 01244472 CN01244472 CN 01244472 CN 01244472 U CN01244472 U CN 01244472U CN 2485864 Y CN2485864 Y CN 2485864Y
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- CN
- China
- Prior art keywords
- stator
- rotor
- slot
- groove
- fractional
- 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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- Permanent Magnet Type Synchronous Machine (AREA)
- Windings For Motors And Generators (AREA)
Abstract
The utility model relates to a brushless DC motor with fraction slots. Ratio of groove amount of a stator with the permanent pole amount is a fraction and the stator groove number is an odd number and the stator groove takes the shape of a straight groove and is evenly distributed. Each of the three phase windings is embedded inside the stator groove with the degree of 120. The coordination method of the stator and the rotor is: the rotor is either wheel external rotor or a shaft type inner rotor. The comprehensive application of various technologies excels the prior matched integer groove brush-less DC motor in the aspects of speed regulation, improving efficiency of vehicles comprising electric bicycle and in textile costume machines and farm machines.
Description
The utility model relates to the power electronics category, belongs to the new product of brshless DC motor.
Brshless DC motor is non-maintaining because of having, the life-span is long; advantages such as current loss is little; be widely used in fields such as machine equipment, the vehicles, household electrical appliance, just as currently just adopted this type of motor with electric power as the electric bicycle of drive source for solving fuel oil pollution, protection environment.But for adapting to different use needs in various device, device, facility, motor all should have the unique design of oneself, and in the hope of improving effect, best electric efficiency has been given play in aspects such as expanding governing.
The utility model provides a kind of fractional-slot brshless DC motor at above-mentioned factor, and purpose is to improve dilly, facility, household electrical appliance now, at aspects such as efficient, speed adjustable range, mechanical properties more excellent motor-driven performance is arranged.
Technical characterictic of the present utility model is: the groove number of stator is a mark with the ratio of the paired permanent magnet number of poles of rotor, and fractional value can be 9/5,15/8,21/11,27/14 etc.And stator slot is odd number straight trough, flute profile unanimity, is equidistant even distribution.
Now provide accompanying drawing:
Accompanying drawing 1 cooperates the structural representation that is external rotor for the utility model stator and rotor
Accompanying drawing 2 is the utility model stator laminating structure schematic diagram
Accompanying drawing 3 is the utility model armature winding structure schematic diagram
Accompanying drawing 4 cooperates the structural representation that is internal rotor for the utility model rotor
Among the figure:
N, S are paired permanent magnet
1 is the stator rabbet section
2,3,4 is position transducer
A, B, C are winding terminal
Further specify it below in conjunction with accompanying drawing:
Rotor of the present utility model can be in two ways and fixed cooperating, or be wheel shell-type external rotor, or be the shaft type internal rotor, during as external rotor, permanent magnet then is fitted in rotor inside diameter surface (seeing accompanying drawing 1), and during as internal rotor, permanent magnet then is fitted in the rotor diameter surface.The position transducer 2,3,4 of stator is hexagonal angle and distributes, and connects three-phase winding terminal A, B, C, and three phase windings are short pitch from concentrated winding, promptly analogized by 1 groove to 2 groove, the star-shaped connection of three-phase, every in 120 ° of stator slots concentrated embedding.In addition: to be Nd-Fe-B permanent magnet, hub directly meet every square millimeter of current density through need and be not more than 4 amperes of conditions for the low-carbon cast steel wall thickness is not less than 5mm, stator winding the permanent magnet of rotor.Its position transducer is ear electronic switch suddenly.
To sum up, divide equally, make commutation angle more accurately and reliably owing to taked fractional-slot, position transducer in motor, to be the hexagonal angle degree, three phase supply cycle unanimity, the running balance has changed dynamic response.Adopt short pitch to concentrate winding, obtained the trapezoidal wave back-emf, effectively reduced harmonic wave, improved starting performance.The straight warp of overstriking armature conductor has reduced the motor internal resistance, has reduced copper loss, has increased mechanical property.Adopt the low-carbon cast steel hub to reduce magnetic leakage, strengthened the magnet-wheel permeability.The utility model is that 21/11 (seeing accompanying drawing) cooperates above every complex art to be applied to electric bicycle to use 48 groove integer slot motors at aspects such as power, efficient, speed adjustable ranges than electric bicycle now simultaneously with the number of stator slots and the ratio of the paired permanent magnet number of poles of rotor, and is more superior.The utility model also can be widely used in other nuisanceless green vehicles (tricycle etc.) textile garment machinery, agricultural mechanical field.
Claims (6)
1, a kind of groove number of stator is the fractional-slot brshless DC motor of mark with the ratio of the paired permanent magnet number of poles of rotor, the stator slot that it is characterized in that it is the odd number straight trough, the flute profile unanimity, equidistant even distribution, and can be with the ratio of the paired permanent magnet number of poles of rotor: 9/5,18/8,21/11,27/14 isodisperse.
2, fractional-slot brshless DC motor according to claim 1 is characterized in that: its rotor can cooperate with stator by inside and outside dual mode, or wheel shell-type external rotor or shaft type internal rotor.
3, require 1 described fractional-slot brshless DC motor as requested, it is characterized in that: the position transducer 2,3,4 of stator is 120 ° of distributions, and connects three-phase winding terminal A, B, C, and three phase windings are short pitch and concentrate winding, promptly analogize the star-shaped connection of three-phase by 1 groove to 2 groove.
4, fractional-slot brshless DC motor according to claim 2, its feature in: the permanent magnet of external rotor is a Nd-Fe-B permanent magnet, and soft shell is a low-carbon cast steel, and wall thickness is no less than 5mm.
5, fractional-slot brshless DC motor according to claim 3, it is characterized in that: the winding diameter of stator meets the condition that every square millimeter of current density is not more than 4 amperes.
6, fractional-slot brshless DC motor according to claim 3 is characterized in that: position transducer is ear electronic switching element suddenly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01244472 CN2485864Y (en) | 2001-06-22 | 2001-06-22 | Brushless D.C. motor with fractional slots |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01244472 CN2485864Y (en) | 2001-06-22 | 2001-06-22 | Brushless D.C. motor with fractional slots |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2485864Y true CN2485864Y (en) | 2002-04-10 |
Family
ID=33655895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01244472 Expired - Fee Related CN2485864Y (en) | 2001-06-22 | 2001-06-22 | Brushless D.C. motor with fractional slots |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2485864Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337032C (en) * | 2003-05-12 | 2007-09-12 | 松下电器产业株式会社 | Closed electric compressor |
| 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 |
| CN103326531B (en) * | 2012-03-21 | 2016-03-09 | 杨志军 | The control system of brushless DC variable frequency motor and use brushless DC variable frequency motor |
-
2001
- 2001-06-22 CN CN 01244472 patent/CN2485864Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337032C (en) * | 2003-05-12 | 2007-09-12 | 松下电器产业株式会社 | Closed electric compressor |
| 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 |
| CN103326531B (en) * | 2012-03-21 | 2016-03-09 | 杨志军 | The control system of brushless DC variable frequency motor and use brushless DC variable frequency motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |