CN219458766U - Brushless motor magnetic circuit structure - Google Patents
Brushless motor magnetic circuit structure Download PDFInfo
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- CN219458766U CN219458766U CN202320677554.XU CN202320677554U CN219458766U CN 219458766 U CN219458766 U CN 219458766U CN 202320677554 U CN202320677554 U CN 202320677554U CN 219458766 U CN219458766 U CN 219458766U
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- permanent magnet
- circuit structure
- magnetic circuit
- brushless motor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Brushless Motors (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The utility model relates to a brushless motor magnetic circuit structure, which comprises a motor stator and a motor rotor, wherein a plurality of winding blocks for winding coils are arranged on the inner wall of the motor stator in an array manner, a magnetic steel mounting groove is formed in the motor rotor, and a permanent magnet is arranged in the magnetic steel mounting groove; the length ratio of the outer diameter length of the motor stator to the outer diameter length of the motor rotor is 0.51-0.53; the included angle formed by connecting two adjacent side ends of adjacent magnets with the circle center is A, and A/90 degrees is 0.71-0.76; the output power of the motor is increased by optimizing the sizes of the motor stator and the motor rotor, and meanwhile, the use amount of the permanent magnets is reduced, and when the use amount of the permanent magnets is reduced, the manufacturing cost of the motor is reduced to a certain extent; when the ratio of the diameter of the motor rotor to the diameter of the motor stator is 0.51-0.53, and the included angle formed by connecting two similar side ends of the permanent magnet with the center of the circle is A, the output power of the motor can be increased by 30-50% relatively, and the consumption of the permanent magnet is reduced by 6%, so that the technical problem in the background technology is solved.
Description
Technical Field
The present disclosure relates to brushless motor, and particularly to a brushless motor.
Background
In recent years, with the development of new materials and new processes and the improvement of machining capability, the permanent magnet brushless motor is widely applied to low-power occasions and direct-drive high-power occasions of various household appliances, IT equipment and the like by virtue of the advantages of low positioning torque, high efficiency, high power density and the like.
In the brushless motor field, the magnetic pole position and the magnetic circuit structure are key parameters of design, so that the advantages and disadvantages of motor performance, motor processing cost and the like are directly determined; the diameter-length ratio of the stator and the rotor of the motor which is common in the market at present is between 0.4 and 0.5, but the utilization rate of the magnetic material of the motor is relatively low under the size, so that the cost of the motor is increased.
Disclosure of Invention
The utility model aims to provide a brushless motor magnetic circuit structure.
The technical aim of the utility model is realized by the following technical scheme: the magnetic circuit structure of the brushless motor comprises a motor stator and a motor rotor, wherein a plurality of winding blocks used for winding coils are arranged on the inner wall of the motor stator in an array manner, a magnetic steel mounting groove is formed in the motor rotor, and a permanent magnet is arranged in the magnetic steel mounting groove;
the length ratio of the outer diameter length of the motor stator to the outer diameter length of the motor rotor is 0.51-0.53;
the included angle formed by connecting two adjacent side ends of the permanent magnets with the circle center is A, and A/90 degrees is 0.71-0.76.
Through adopting above-mentioned technical scheme, in this scheme, through optimizing the size in motor stator, the motor rotor to increase the output of motor, reduce the use amount of permanent magnet simultaneously, when the use amount of permanent magnet reduces, also equivalent to reducing the manufacturing cost of motor to a certain extent, and reduced the dead weight of motor; when the ratio of the diameter of the motor rotor to the diameter of the motor stator is 0.51-0.53, and the included angle formed by connecting two similar side ends of the permanent magnet with the center of the circle is A, the output power of the motor can be increased by 30-50% relatively, and the consumption of the permanent magnet is reduced by 6%, so that the technical problem in the background technology is solved.
Preferably, the permanent magnet has a rectangular cross-sectional shape.
Preferably, the permanent magnet is formed by splicing multiple axial sections or multiple longitudinal sections, and the section shape of the permanent magnet is rectangular.
Preferably, the motor stator is provided with air holes.
Preferably, the air holes are provided in a plurality.
Preferably, the motor rotor is provided with heat dissipation holes.
Preferably, the heat dissipation holes are provided in a plurality.
In summary, the utility model has the following beneficial effects:
at present, the utilization rate of magnetic materials of a motor in a common brushless motor in the market is relatively low, so that the efficiency of the motor is relatively low, in the scheme, the output power of the motor is increased by optimizing the sizes of a motor stator and a motor rotor, meanwhile, the use amount of a permanent magnet is reduced, and when the use amount of the permanent magnet is reduced, the manufacturing cost of the motor is reduced to a certain extent, and the dead weight of the motor is reduced; when the ratio of the diameter of the motor rotor to the diameter of the motor stator is 0.51-0.53, and the included angle formed by connecting two similar side ends of the permanent magnet with the center of the circle is A, the output power of the motor can be increased by 30-50% relatively, and the consumption of the permanent magnet is reduced by 6%;
in addition, the air holes and the radiating holes are formed in the motor rotor and the motor stator, so that a good radiating effect can be achieved, when the motor works, the fan on the motor rotates to drive gas to pass through the air holes and the radiating holes rapidly, and the air holes and the radiating holes are equivalent to a labyrinth-shaped radiating air channel formed in the motor, so that heat can be radiated more rapidly and uniformly;
under the arrangement, when the counter potential is tested, the waveform of the counter potential is gradually converted into a trapezoidal waveform from the original waveform approaching to a saddle, so that noise generated when the motor rotates is reduced, the motor efficiency is high, and the motor is energy-saving and environment-friendly.
Drawings
Fig. 1 is a schematic diagram of the overall structure in the embodiment.
A motor stator; 11. a winding block; 12. air holes; 2. a motor rotor; 21. a magnetic steel installation groove; 22. a permanent magnet; 23. and the heat dissipation holes.
Description of the embodiments
The present utility model will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.
Examples
A brushless motor magnetic circuit structure is shown in figure 1, and comprises a motor stator 1 and a motor rotor 2, wherein a plurality of winding blocks 11 for winding coils are arranged on the inner wall of the motor stator 1 in an array manner, a magnetic steel mounting groove 21 is formed in the motor rotor 2, and a permanent magnet 22 is arranged in the magnetic steel mounting groove 21;
the length ratio of the outer diameter length of the motor stator 1 to the outer diameter length of the motor rotor 2 is 0.51-0.53;
the included angle formed by connecting the two adjacent side ends of the adjacent permanent magnets 22 with the circle center is A, and A/90 degrees is 0.71-0.76.
As shown in fig. 1, the permanent magnet has a rectangular cross-sectional shape.
As shown in fig. 1, the permanent magnet is formed by splicing multiple axial sections or multiple longitudinal sections, and the section shape of the permanent magnet is rectangular.
As shown in fig. 1, the motor stator 1 is provided with air holes 12, and the air holes 12 are provided in a plurality of numbers.
As shown in fig. 1, the motor rotor 2 is provided with heat dissipation holes 23, and the heat dissipation holes 23 are provided in a plurality of numbers.
Working principle: in the scheme, the output power of the motor is increased by optimizing the sizes of the motor stator and the motor rotor, and meanwhile, the use amount of the permanent magnet is reduced, and when the use amount of the permanent magnet is reduced, the manufacturing cost of the motor is reduced to a certain extent, and the dead weight of the motor is reduced; when the ratio of the diameter of the motor rotor to the diameter of the motor stator is 0.51-0.53, and the included angle formed by connecting two similar side ends of the permanent magnet with the center of the circle is A, the output power of the motor can be increased by 30-50% relatively, and the consumption of the permanent magnet is reduced by 6%; in addition, the air holes and the radiating holes are formed in the motor rotor and the motor stator, so that a good radiating effect can be achieved, when the motor works, the fan on the motor rotates to drive gas to pass through the air holes and the radiating holes rapidly, and the air holes and the radiating holes are equivalent to a labyrinth-shaped radiating air channel formed in the motor, so that heat can be radiated more rapidly and uniformly; under the arrangement, when the counter potential is tested, the waveform of the counter potential is gradually converted into a trapezoidal waveform from the original waveform approaching to a saddle, so that noise generated when the motor rotates is reduced, the motor efficiency is high, and the motor is energy-saving and environment-friendly.
Claims (7)
1. The utility model provides a brushless motor magnetic circuit structure, includes motor stator (1) and motor rotor (2), its characterized in that: the motor comprises a motor stator (1), wherein a plurality of winding blocks (11) for winding coils are arranged on the inner wall of the motor stator in an array manner, a magnetic steel installation groove (21) is formed in the motor rotor (2), and a permanent magnet (22) is arranged in the magnetic steel installation groove (21);
the length ratio of the outer diameter length of the motor stator (1) to the outer diameter length of the motor rotor (2) is 0.51-0.53;
the included angle formed by connecting the two adjacent side ends of the permanent magnet (22) with the circle center is A, and A/90 degrees are respectively equal to 0.71-0.76.
2. A brushless motor magnetic circuit structure according to claim 1, wherein: the section shape of the permanent magnet is rectangular.
3. A brushless motor magnetic circuit structure according to claim 2, wherein: the permanent magnet is formed by splicing axial sections or longitudinal sections, and the section shape of the permanent magnet is rectangular.
4. A brushless motor magnetic circuit structure according to claim 3, wherein: an air hole (12) is formed in the motor stator (1).
5. A brushless motor magnetic circuit structure according to claim 4, wherein: the air holes (12) are arranged in a plurality of ways.
6. A brushless motor magnetic circuit structure according to claim 5, wherein: and the motor rotor (2) is provided with a heat dissipation hole (23).
7. The brushless motor magnetic circuit structure according to claim 6, wherein: the heat dissipation holes (23) are formed in a plurality of parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320677554.XU CN219458766U (en) | 2023-03-31 | 2023-03-31 | Brushless motor magnetic circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320677554.XU CN219458766U (en) | 2023-03-31 | 2023-03-31 | Brushless motor magnetic circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219458766U true CN219458766U (en) | 2023-08-01 |
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ID=87410867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320677554.XU Active CN219458766U (en) | 2023-03-31 | 2023-03-31 | Brushless motor magnetic circuit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219458766U (en) |
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2023
- 2023-03-31 CN CN202320677554.XU patent/CN219458766U/en active Active
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