CN207053269U - A kind of rotor of electric toothbrush brushless electric machine - Google Patents
A kind of rotor of electric toothbrush brushless electric machine Download PDFInfo
- Publication number
- CN207053269U CN207053269U CN201720635815.6U CN201720635815U CN207053269U CN 207053269 U CN207053269 U CN 207053269U CN 201720635815 U CN201720635815 U CN 201720635815U CN 207053269 U CN207053269 U CN 207053269U
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- rotor
- rotor core
- permanent magnet
- magnetic pole
- electric machine
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Abstract
The utility model discloses a kind of rotor of electric toothbrush brushless electric machine, it includes rotating shaft, rotor core is fixed with rotating shaft, the groove position of some accommodating permanent magnets is offered on the rotor core, permanent magnet is fixed with the groove position, the surface of the rotor core is protruded in one end of the permanent magnet, sets permanent magnet and is higher by the height of rotor core as A, rotor air gap is t, then A ＞ 2t.The utility model is reasonable in design ingenious, the factor such as the distance at edge, the unilateral gas length of stator rotor, rotor core magnetic pole groove depth between the thickness and amplitude, magnetic pole of comprehensive consideration permanent magnet, 2 times of distance more than air gap between rotor so that the space between the N of rotor, S magnetic pole is creeped.The magnetic flux of interlinked leakage between magnetic pole is so greatly reduced, motor torque is improved so as to reach, improves efficiency, improvement motor temperature rise height etc..
Description
Technical field
It the utility model is related to motor, and in particular to a kind of rotor of electric toothbrush brushless electric machine.
Background technology
The rotor of electric toothbrush brushless electric machine generally includes the rotor core being fixed in rotating shaft, and on rotor core
Magnetic pole.And magnetic pole is used for accommodating typically by fluting on rotor core or perforate.But in rotor core fluting or perforate, piece
After the permanent magnet of shape or strip is inlayed or inserts rotor core, although fixed magnetic pole can be played a part of, due to magnetic
Interpolar is cored to be connected, and has part magnetic flux to form catena between itself and adjoining N, S pole, causes the part magnetic flux not have
By the air gap between rotor magnetic pole and stator core so as to forming air-gap field.And air-gap field is the tie for transmitting torsion,
So interelectrode magnetic leakage is the main reason for causing the weakness such as motor torque is small, efficiency is low, motor temperature rise height.
At present it is difficult to effectively solve always the problem of rotor interelectrode magnetic leakage, especially iron core fluting or perforate fixed magnetic pole
Rotor.
Utility model content
In order to solve the above problems, the utility model discloses a kind of rotor of electric toothbrush brushless electric machine.
Used technical scheme is the utility model to achieve the above object：
A kind of rotor of electric toothbrush brushless electric machine, it includes rotating shaft, rotor core is fixed with rotating shaft, the rotor core
On offer the groove positions of some accommodating permanent magnets, permanent magnet, one end of the permanent magnet are fixed with the groove position
The surface of the rotor core is protruded, permanent magnet is set and is higher by the height of rotor core as A, rotor air gap is t, then A ＞ 2t.
The rotor core is rectangle, and the corresponding two sides of the rotor core are arcwall face, in phase on the arcwall face
It is correspondingly provided with permanent magnet N pole and permanent magnet S poles.
Distance is B between setting adjacent permanent magnet poles, then B ＞ 3t.
The shape of cross section of the permanent magnet is parallelogram.
The beneficial effects of the utility model are：The utility model is reasonable in design ingenious, considers every possible angle permanent magnet
The factor such as the unilateral gas length of the distance at edge, stator rotor, rotor core magnetic pole groove depth between thickness and amplitude, magnetic pole,
2 times of distance more than air gap between rotor so that the space between the N of rotor, S magnetic pole is creeped.So greatly reduce between magnetic pole
The magnetic flux of interlinked leakage, motor torque, raising efficiency, improvement motor temperature rise height etc. are improved so as to reach.
Below in conjunction with the accompanying drawings with embodiment, the utility model is further illustrated.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the enlarged diagram of magnetic circuit in Fig. 1.
Embodiment
Embodiment, referring to Fig. 1 and Fig. 2, a kind of rotor for electric toothbrush brushless electric machine that the present embodiment provides, it includes turning
Axle 4, rotor core 5 is fixed with rotating shaft 4, the groove position of some accommodating permanent magnets 6 is offered on the rotor core 5, in described
Permanent magnet 6 is fixed with groove position, one end of the permanent magnet 6 protrudes the surface of the rotor core 5, sets permanent magnet 6
The height for being higher by rotor core 5 is A, and rotor air gap is t, then A ＞ 2t.
In Fig. 1,1 is stator magnetic pole iron cores, and 2 be stator coil, and I is permanent magnet itself N, S interelectrode magnetic leakage road, and II is
Adjacent permanent magnet poles N, S poles leakage magnetic circuit.
The rotor core 5 is rectangle, and the corresponding two sides of the rotor core 5 are arcwall face, on the arcwall face
It is corresponding to be provided with permanent magnet 6N poles and permanent magnet 6S poles.
The magnetic anode-cathode distance of adjacent permanent 6 is set as B, then B ＞ 3t.
The shape of cross section of the permanent magnet 6 is parallelogram.
The utility model is reasonable in design ingenious, considers every possible angle the thickness and amplitude (polar angle degree), magnetic pole of permanent magnet
Between the factor such as the distance at edge, the unilateral gas length of stator rotor, rotor core magnetic pole groove depth so that the N of rotor, S magnetic
Creep apart from 2 times more than air gap between rotor in the space of interpolar.The magnetic flux of interlinked leakage between magnetic pole is so greatly reduced,
Motor torque, raising efficiency, improvement motor temperature rise height etc. are improved so as to reach.
It is described above, only it is preferred embodiment of the present utility model, not the utility model is made any formal
Limitation.Any those skilled in the art, it is all available in the case where not departing from technical solutions of the utility model ambit
The technological means and technology contents of the disclosure above make many possible changes and modifications to technical solutions of the utility model, or repair
It is changed to the equivalent embodiment of equivalent variations.Therefore every content without departing from technical solutions of the utility model, according to the utility model
The equivalence changes made of shape, construction and principle, all should be covered by the scope of protection of the utility model.
Claims (4)
1. a kind of rotor of electric toothbrush brushless electric machine, it includes rotating shaft, rotor core is fixed with rotating shaft, on the rotor core
The groove position of some accommodating permanent magnets is offered, permanent magnet is fixed with the groove position, it is characterised in that：The permanent magnetic
The surface of the rotor core is protruded in one end of iron, sets permanent magnet and is higher by the height of rotor core as A, and rotor air gap is t,
Then A ＞ 2t.
2. the rotor of electric toothbrush brushless electric machine according to claim 1, it is characterised in that the rotor core is rectangular
Shape, the corresponding two sides of the rotor core are arcwall face, and permanent magnet N pole and permanent magnetic are provided with corresponding on the arcwall face
Iron S poles.
3. the rotor of electric toothbrush brushless electric machine according to claim 1, it is characterised in that setting adjacent permanent magnetic
Anode-cathode distance is B, then B ＞ 3t.
4. the rotor of electric toothbrush brushless electric machine according to claim 1, it is characterised in that the permanent magnet it is transversal
Face is shaped as parallelogram.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720635815.6U CN207053269U (en) | 2017-06-03 | 2017-06-03 | A kind of rotor of electric toothbrush brushless electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720635815.6U CN207053269U (en) | 2017-06-03 | 2017-06-03 | A kind of rotor of electric toothbrush brushless electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207053269U true CN207053269U (en) | 2018-02-27 |
Family
ID=61490554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720635815.6U Active CN207053269U (en) | 2017-06-03 | 2017-06-03 | A kind of rotor of electric toothbrush brushless electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207053269U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539907A (en) * | 2018-03-23 | 2018-09-14 | 东莞市吉铼升电机股份有限公司 | A kind of micro motor |
| CN108667255A (en) * | 2018-06-05 | 2018-10-16 | 三椒口腔健康股份有限公司 | A kind of electric toothbrush vibrating motor |
-
2017
- 2017-06-03 CN CN201720635815.6U patent/CN207053269U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539907A (en) * | 2018-03-23 | 2018-09-14 | 东莞市吉铼升电机股份有限公司 | A kind of micro motor |
| CN108667255A (en) * | 2018-06-05 | 2018-10-16 | 三椒口腔健康股份有限公司 | A kind of electric toothbrush vibrating motor |
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