CN207321077U - A kind of DC brushless motor for reducing cogging torque - Google Patents
A kind of DC brushless motor for reducing cogging torque Download PDFInfo
- Publication number
- CN207321077U CN207321077U CN201720777110.8U CN201720777110U CN207321077U CN 207321077 U CN207321077 U CN 207321077U CN 201720777110 U CN201720777110 U CN 201720777110U CN 207321077 U CN207321077 U CN 207321077U
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- China
- Prior art keywords
- brushless motor
- cogging torque
- permanent magnet
- stator core
- main shaft
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Brushless Motors (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The utility model discloses a kind of DC brushless motor for reducing cogging torque, including stator module, rotor assembly, main shaft, be socketed in the rolling bearing at main shaft both ends and end cap or base for fixing motor；The rotor assembly includes the permanent magnet filled with some magnetic poles；The stator module includes stator core and the enameled wire being wrapped on stator core, and the stator core includes silicon steel sheet or magnetizer；Some grooves are provided with the corresponding surface of the permanent magnet and stator core, the groove is in magnetic field center of the rotor per pole magnetic pole.The utility model achievees the purpose that to reduce DC brushless motor rotor cogging torque and improves the smoothness of motor operation, allow torsion needed for electric motor starting to diminish by improving the shape and structure of brushless DC motor permanent magnet, operation, shift, parking is more steady, lifts the quality of product.
Description
Technical field
It the utility model is related to a kind of DC brushless motor, and in particular to a kind of brush DC electricity for reducing cogging torque
Machine.
Background technology
DC brushless motor, has the advantages of energy-efficient, convenient control.Motor body is usually by stator module, rotor
Component, axis, bearing and end cap or base are formed.The corresponding surface of stator core and rotor is provided with some notches, and rotor assembly is main
It is made of permanent-magnet material by certain rule, permanent-magnet material can be filled some there is teeth groove to magnetic pole, such DC brushless motor
Torque, cogging torque is bigger to have larger harmful effect to electric motor starting, operating, shift, parking, and motor periodic perturbations are big,
Sound is big.Application to motor brings puzzlement, particularly requires tight application environment in noise requirements height and vibrations.
Utility model content
For overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of direct current for reducing cogging torque
Brushless electric machine.By improving the shape and structure of brushless DC motor permanent magnet, reaching reduces DC brushless motor turns surely
The purpose of sub- cogging torque and the smoothness of raising motor operation, allows torsion needed for electric motor starting to diminish, and runs, shift, parking
It is more steady, lift the quality of product.
To solve the above problems, technical solution is as follows used by the utility model：
A kind of DC brushless motor for reducing cogging torque, including stator module, rotor assembly, main shaft, be socketed in main shaft
The rolling bearing at both ends and end cap or base for fixing motor；The rotor assembly includes the permanent magnetism filled with some magnetic poles
Body；The stator module includes stator core and the enameled wire being wrapped on stator core, and the stator core includes silicon steel sheet
Or magnetizer；Some grooves are provided with the corresponding surface of the permanent magnet and stator core, the groove is in rotor per pole magnetic
The magnetic field center of pole.
As further scheme, DC brushless motor described in the utility model is external-rotor DC. brush-less, institute
State rotor assembly and further include magnetic guiding cycle, the stator core is socketed on main shaft, and the permanent magnet is circlewise installed on the end
On the inner wall of lid or magnetic guiding cycle.
As further scheme, DC brushless motor described in the utility model is internal rotor DC brushless motor, institute
Permanent magnet is stated to be fixed on main shaft.
As further scheme, permanent magnet described in the utility model includes some magnetic shoes, some magnetic shoe arrangements
Loop configuration is formed, the groove is arranged at the position of the geometric center of magnetic shoe.
As further scheme, permanent magnet described in the utility model be along some magnetic shoes on mounting bracket, it is some
Magnetic shoe forms loop configuration along mounting bracket inner wall circle best-fit, and the groove is arranged at the position of the geometric center of magnetic shoe.
As further scheme, the rectangular cross-section of groove described in the utility model is trapezoidal, it is arc-shaped in one kind or
It is the combination of several shapes.As further scheme, groove described in the utility model is axial along main shaft on permanent magnet
Direction opens up.
As further scheme, groove described in the utility model opens up on permanent magnet perpendicular to major axes orientation.
It is as follows relative to the prior art, the beneficial effects of the utility model：
1. the DC brushless motor described in the utility model for reducing cogging torque is changed by setting groove on permanent magnet
Become the structure of permanent magnet, reach the mesh for the smoothness for reducing DC brushless motor rotor cogging torque and improving motor operation
, allow torsion needed for electric motor starting to diminish, run, shift, parking is more steady, lifts the quality of product；
2. in the DC brushless motor described in the utility model for reducing cogging torque, the slot effect production of stator and rotor
Raw torque ratio routine integer groove collocation ceiling-fan motor is much smaller, and usually the former is 1/2 or so of the latter；
3. the triple-frequency harmonics of the DC brushless motor electromagnetic torque described in the utility model for reducing cogging torque and five times
Harmonic component significantly weakens, and motor does not have electromagnetism abnormal sound when operating.
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is the DC brushless motor structure structure diagram of reduction cogging torque described in the utility model；
Fig. 2 is the DC brushless motor structure schematic diagram of the reduction cogging torque described in the utility model embodiment 1；
Fig. 3 is the DC brushless motor structure schematic diagram of the reduction cogging torque described in the utility model embodiment 2；
Wherein, each reference numeral is：1st, stator module；11st, stator core；12 enameled wires；2nd, rotor assembly；21st, groove；
3rd, main shaft.
Embodiment
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of DC brushless motor for reducing cogging torque described in the utility model, including
Stator module 1, rotor assembly 2, main shaft 3, be socketed in the rolling bearing at 3 both ends of main shaft and end cap or bottom for fixing motor
Seat；The rotor assembly 2 includes the permanent magnet filled with some magnetic poles；The stator module 1 includes stator core 11 and is wrapped in
Enameled wire 12 on stator core 11, the stator core 11 include silicon steel sheet or magnetizer；The permanent magnet and stator core
Some grooves 21 are provided with 11 corresponding surface, the groove 21 is in magnetic field center of the rotor per pole magnetic pole.
As shown in Fig. 2, Fig. 1 is the structure diagram that 6 groove of stator arranges in pairs or groups pole with rotor 8, in the implementation of the utility model
In example 1, as further scheme, the DC brushless motor is external-rotor DC. brush-less, and the rotor assembly also wraps
Magnetic guiding cycle is included, the stator core 11 is socketed on main shaft 3, and the permanent magnet is circlewise installed on the end cap or magnetic guiding cycle
On inner wall.The program can effectively reduce by 50% motor cogging torque, solve vibration and the electromagnetism abnormal sound of motor.
As shown in Figure 3 in the embodiment 2 of the utility model, as further scheme, the DC brushless motor
For internal rotor DC brushless motor, the permanent magnet is fixed on main shaft 3.
On the basis of embodiment 1 or embodiment 2, in the embodiment 3 of the utility model, as further scheme, institute
The permanent magnet stated includes some magnetic shoes, some magnetic shoe arrangement form loop configuration, and the groove 21 is arranged on the several of magnetic shoe
At the position at what center.
On the basis of embodiment 1 or embodiment 2, in the embodiment 4 of the utility model, as further scheme, sheet
Permanent magnet described in utility model includes some magnetic shoes, some magnetic shoe arrangement form loop configuration, and the groove is arranged on
At the position of the geometric center of magnetic shoe.
It is described in the utility model as further scheme on the basis of above-described embodiment 1-4 any one embodiment
Groove rectangular cross-section, it is trapezoidal, it is arc-shaped in one kind or several shapes combination.
It is described in the utility model as further scheme on the basis of above-described embodiment 1-4 any one embodiment
Groove opened up on permanent magnet along main shaft axial direction.
As further scheme, groove described in the utility model opens up on permanent magnet perpendicular to major axes orientation.
The above embodiment is only the preferred embodiment of the utility model, it is impossible to is protected with this to limit the utility model
Scope, the change of any unsubstantiality that those skilled in the art is done on the basis of the utility model and replacing belongs to
In the utility model scope claimed.
Claims (7)
1. a kind of DC brushless motor for reducing cogging torque, including stator module, rotor assembly, main shaft, be socketed in main shaft two
The rolling bearing at end and end cap or base for fixing motor；It is characterized in that, the rotor assembly is included filled with some
The permanent magnet of magnetic pole；The stator module includes stator core and the enameled wire being wrapped on stator core, the stator core
Including silicon steel sheet or magnetizer；Some grooves are provided with the corresponding surface of the permanent magnet and stator core, the groove is in
Magnetic field center of the rotor per pole magnetic pole.
2. the DC brushless motor according to claim 1 for reducing cogging torque, it is characterised in that the brush DC electricity
Machine is external-rotor DC. brush-less, and the rotor assembly further includes magnetic guiding cycle, and the stator core is socketed on main shaft, described
Permanent magnet is circlewise installed on the inner wall of the end cap or magnetic guiding cycle.
3. the DC brushless motor according to claim 1 for reducing cogging torque, it is characterised in that the brush DC electricity
Machine is internal rotor DC brushless motor, and the permanent magnet is fixed on main shaft.
4. the DC brushless motor of the reduction cogging torque according to Claims 2 or 3, it is characterised in that the permanent magnet
Including some magnetic shoes, some magnetic shoe arrangement form loop configuration, the groove is arranged on the position of the geometric center of magnetic shoe
Place.
5. the DC brushless motor according to claim 1 for reducing cogging torque, it is characterised in that the section of the groove
It is trapezoidal for rectangle, it is arc-shaped in one kind or several shapes combination.
6. the DC brushless motor according to claim 1 for reducing cogging torque, it is characterised in that the groove is in permanent magnetism
Opened up on body along main shaft axial direction.
7. the DC brushless motor according to claim 1 for reducing cogging torque, it is characterised in that the groove is in permanent magnetism
Opened up on body perpendicular to major axes orientation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720777110.8U CN207321077U (en) | 2017-06-29 | 2017-06-29 | A kind of DC brushless motor for reducing cogging torque |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720777110.8U CN207321077U (en) | 2017-06-29 | 2017-06-29 | A kind of DC brushless motor for reducing cogging torque |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207321077U true CN207321077U (en) | 2018-05-04 |
Family
ID=62433406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720777110.8U Active CN207321077U (en) | 2017-06-29 | 2017-06-29 | A kind of DC brushless motor for reducing cogging torque |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207321077U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224511A (en) * | 2019-06-28 | 2019-09-10 | 徐州逸腾机电科技有限公司 | A kind of electric vehicle brushless motor rotor structure |
| WO2020211494A1 (en) * | 2019-04-15 | 2020-10-22 | 佛山市启正电气有限公司 | Low-rotation-speed large-torque outer rotor, electric motor, and ceiling fan |
| CN112583160A (en) * | 2020-12-21 | 2021-03-30 | 哈尔滨理工大学 | Novel permanent magnet synchronous motor structure |
| CN112838695A (en) * | 2021-03-23 | 2021-05-25 | 哈尔滨理工大学 | Stator and rotor structure of novel surface-mounted permanent magnet motor |
-
2017
- 2017-06-29 CN CN201720777110.8U patent/CN207321077U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020211494A1 (en) * | 2019-04-15 | 2020-10-22 | 佛山市启正电气有限公司 | Low-rotation-speed large-torque outer rotor, electric motor, and ceiling fan |
| CN110224511A (en) * | 2019-06-28 | 2019-09-10 | 徐州逸腾机电科技有限公司 | A kind of electric vehicle brushless motor rotor structure |
| CN112583160A (en) * | 2020-12-21 | 2021-03-30 | 哈尔滨理工大学 | Novel permanent magnet synchronous motor structure |
| CN112838695A (en) * | 2021-03-23 | 2021-05-25 | 哈尔滨理工大学 | Stator and rotor structure of novel surface-mounted permanent magnet motor |
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