CN202145613U - Minisize brushless motor - Google Patents
Minisize brushless motor Download PDFInfo
- Publication number
- CN202145613U CN202145613U CN201120261811U CN201120261811U CN202145613U CN 202145613 U CN202145613 U CN 202145613U CN 201120261811 U CN201120261811 U CN 201120261811U CN 201120261811 U CN201120261811 U CN 201120261811U CN 202145613 U CN202145613 U CN 202145613U
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- rotor
- magnetic
- stator
- casing
- electric machine
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Abstract
The utility model discloses a minisize brushless motor, comprising a casing, a stator embedded in the casing and a rotor arranged in the stator, wherein a piece of flat magnetic steel is embedded in the rotor, the external diameter of the casing is smaller than 50mm, single side cooperation air gap between the stator and the rotor is 0.3 to 0.4mm, two ends of the flat magnetic steel are provided with magnetic bridges, and thickness of each magnetic bridge is 0.25 to 0.35mm. By adopting parameter cooperation of the minisize brushless motor, magnetic leakage magnetic flux of the motor can be effectively reduced, high air-gap flux density is generated, performance of the magnetic steel is fully played, magnetic resistance moment of the motor is fully utilized, power density of the motor is effectively improved, usage of rare earth material is reduced, performance of high power density and low cost are both available. The minisize brushless motor adopts the built-in magnetic steel, thereby avoiding the protection problem of the rotor in manufacturing technology and simplifying bonding technology of the magnetic steel.
Description
Technical field
The utility model relates to a kind of motor, relates in particular to a kind of miniature brushless electric machine.
Background technology
The rotor magnetic circuit structural of brushless electric machine mainly contains surface-mount type, built-in (embedding) magnet steel formula, tangential magnetic circuit formula etc. at present.Relative other magnetic structures wherein, advantage such as it is simple that built-in (embedding) magnet steel formula rotor magnetic circuit structural has structural manufacturing process, and the cost of material is low, the machine operation characteristic is good and control mode is flexible.But magnetic bridge must be set to prevent excessive leakage field in built-in (embedding) magnet steel formula rotor magnetic circuit structural, its built-in (embedding) magnet steel formula rotor magnetic circuit structural generally is employed in the mode of build-in bar magnet all around of motor rotor punching sheet.Built-in but (embedding) magnet steel formula magnetic structure in micromachine because the restriction of overall dimensions, how to dispose each parameter with obtain the good motor of overall performance, become a problem that needs to be resolved hurrily.
The utility model content
In order to solve problem related in the background technology, the utility model provides a kind of miniature brushless electric machine.
The technical scheme of the utility model is: a kind of miniature brushless electric machine; Comprise casing, be embedded in stator and the rotor that is arranged in the stator in the casing, rotor is embedded with dull and stereotyped magnet steel; External diameter＜the 50mm of said casing; The monolateral cooperation size of gaps of said stator and rotor is 0.3-0.4mm, and the two ends of said dull and stereotyped magnet steel are provided with magnetic bridge, and the thickness of said magnetic bridge is 0.25-0.35mm.
As a kind of preferred, said dull and stereotyped magnet steel is processed by rare-earth permanent magnetic material.
As a kind of preferred, said rotor is provided with ventilation hole.
As a kind of preferred, include the consistent dull and stereotyped magnet steel of four block sizes, on the said rotor symmetry have four insertion grooves, said dull and stereotyped magnet steel is arranged in the insertion groove.
As a kind of preferred, said magnetic bridge comprises the arcuate socket that is arranged on the insertion groove two ends and communicates with it, is provided with filler in the said arcuate socket.
As a kind of preferred, said filler is non-magnetic metal, plastics or epoxide resin material.
As a kind of preferred, said arcuate socket includes an arc limit concentric with the rotor cylindrical.
In sum, the utlity model has following advantage:
Adopt the parameter of the utility model to cooperate; Can effectively reduce the leakage field magnetic flux of motor; Produce higher air gap flux density, can give full play to the performance of magnet steel and can utilize the magnetic resistance moment of motor, effectively improved the power density of motor; And reduced the use of rare earth material, taken into account the performance and the low cost of high power density.In addition as adopting the miniature brushless electric machine of built-in magnet steel, a rotor protection difficult problem of not only avoiding on the manufacturing process has also been simplified bonding magnetic steel technology.
Description of drawings
Fig. 1 is a present embodiment mechanical part sketch map.
Embodiment
The utility model is described further with embodiment below in conjunction with accompanying drawing.
Embodiment one
As shown in Figure 1; A kind of miniature brushless electric machine comprises casing 1, is embedded in stator 2 and the rotor 3 that is arranged in the stator 2 in the casing 1; Rotor 3 is embedded with dull and stereotyped magnet steel 4; Include the consistent dull and stereotyped magnet steel 4 of four block sizes, on the said rotor 3 symmetry have four insertion grooves, said dull and stereotyped magnet steel 4 is arranged in the insertion groove.The external diameter of said casing 1 is 30mm, and the monolateral cooperation size of gaps of said stator 2 and rotor 3 is 0.3mm, and the two ends of said dull and stereotyped magnet steel 4 are provided with magnetic bridge, and the thickness of said magnetic bridge is 0.25mm.Said dull and stereotyped magnet steel 4 is processed by rare-earth permanent magnetic material.Said rotor 3 is provided with ventilation hole 31.Said magnetic bridge comprises the arcuate socket 51 that is arranged on the insertion groove two ends and communicates with it, is provided with filler in the said arcuate socket 51.Said filler is non-magnetic metal.Said arcuate socket 51 includes an arc limit 52 concentric with rotor 3 cylindricals.
Embodiment two
Be that with the difference of embodiment one external diameter of casing 1 is 40mm, the monolateral cooperation size of gaps of stator 2 and rotor 3 is 0.4mm, and the thickness of magnetic bridge 5 is 0.35mm.Filler is plastics.
Embodiment three
Be that with the difference of embodiment one external diameter of casing 1 is 50mm, the monolateral cooperation size of gaps of stator 2 and rotor 3 is 0.35mm, and the thickness of magnetic bridge 5 is 0.3mm.Filler is an epoxide resin material.
Embodiment four
Be that with the difference of embodiment one external diameter of casing 1 is 35mm, the monolateral cooperation size of gaps of stator 2 and rotor 3 is 0.33mm, and the thickness of magnetic bridge 5 is 0.32mm.Filler is an epoxide resin material.
Embodiment five
Be that with the difference of embodiment one external diameter of casing 1 is 45mm, the monolateral cooperation size of gaps of stator 2 and rotor 3 is 0.38mm, and the thickness of magnetic bridge 5 is 0.28mm.Filler is an epoxide resin material.
Present embodiment related products and existing miniature brushless electric machine compared with techniques possess power density height, low, the advantage of simple technology of cost.And use in the miniature brushless electric machine that is particularly suitable for power density is had relatively high expectations.
More than explanation only is the explanation to the utility model; Make enforcement this programme that those of ordinary skills can be complete; But be not restriction to the utility model; Those skilled in the art can make the modification that does not have creative contribution to present embodiment as required after reading this specification, these all are not creative modifications.But as long as in the claim scope of the utility model, all receive the protection of Patent Law.
Claims (7)
1. miniature brushless electric machine; Comprise casing (1), be embedded in the stator (2) in the casing (1) and be arranged on the rotor (3) in the stator (2) that rotor (3) is embedded with dull and stereotyped magnet steel (4); It is characterized in that: the external diameter＜50mm of said casing (1); The monolateral cooperation size of gaps of said stator (2) and rotor (3) is 0.3-0.4mm, and the two ends of said dull and stereotyped magnet steel (4) are provided with magnetic bridge, and the thickness of said magnetic bridge is 0.25-0.35mm.
2. a kind of miniature brushless electric machine according to claim 1 is characterized in that: said dull and stereotyped magnet steel (4) is processed by rare-earth permanent magnetic material.
3. a kind of miniature brushless electric machine according to claim 1 and 2 is characterized in that: said rotor (3) is provided with ventilation hole (31).
4. a kind of miniature brushless electric machine according to claim 1 and 2 is characterized in that: include the consistent dull and stereotyped magnet steel (4) of four block sizes, said rotor (3) is gone up four insertion grooves that have of symmetry, and said dull and stereotyped magnet steel (4) is arranged in the insertion groove.
5. a kind of miniature brushless electric machine according to claim 1 is characterized in that: said magnetic bridge comprises the arcuate socket (51) that is arranged on the insertion groove two ends and communicates with it, and said arcuate socket is provided with filler in (51).
6. a kind of miniature brushless electric machine according to claim 5 is characterized in that: said filler is non-magnetic metal, plastics or epoxide resin material.
7. a kind of miniature brushless electric machine according to claim 6 is characterized in that: said arcuate socket (51) includes an arc limit (52) concentric with rotor (3) cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120261811U CN202145613U (en) | 2011-07-22 | 2011-07-22 | Minisize brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120261811U CN202145613U (en) | 2011-07-22 | 2011-07-22 | Minisize brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202145613U true CN202145613U (en) | 2012-02-15 |
Family
ID=45581538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120261811U Expired - Fee Related CN202145613U (en) | 2011-07-22 | 2011-07-22 | Minisize brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202145613U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110544997A (en) * | 2018-05-29 | 2019-12-06 | 华为技术有限公司 | motor rotor device and motor |
-
2011
- 2011-07-22 CN CN201120261811U patent/CN202145613U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110544997A (en) * | 2018-05-29 | 2019-12-06 | 华为技术有限公司 | motor rotor device and motor |
| CN110544997B (en) * | 2018-05-29 | 2022-05-31 | 华为技术有限公司 | Motor rotor device and motor |
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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: 20120215 Termination date: 20170722 |