CN220732440U - Frameless motor for radar - Google Patents
Frameless motor for radar Download PDFInfo
- Publication number
- CN220732440U CN220732440U CN202322052209.XU CN202322052209U CN220732440U CN 220732440 U CN220732440 U CN 220732440U CN 202322052209 U CN202322052209 U CN 202322052209U CN 220732440 U CN220732440 U CN 220732440U
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- CN
- China
- Prior art keywords
- stator
- rotor
- radar
- core
- slot
- 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.)
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Links
- 238000004080 punching Methods 0.000 claims description 18
- 239000003292 glue Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 239000003973 paint Substances 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract description 3
- 238000004804 winding Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002592 echocardiography Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
Abstract
The application relates to a frameless motor for radar belongs to DC brushless motor's technical field, and it includes stator and rotor, the coaxial heart of stator is arranged in inside the rotor, and both are mutual contactless. The stator core can be directly fixed by using the joint of the radar, the power output is realized by connecting an output joint shaft on the radar with the rotor core, the motor can be directly embedded into the radar joint, the requirements of the radar on small volume, light weight and low inertia of the motor are met, meanwhile, the insulation is realized by adopting a special insulating paint spraying process on the surface of the stator core, and thus, the copper wire can be directly wound on the stator, and the space can be furthest saved in space.
Description
Technical Field
The application relates to the technical field of direct current brushless motors, in particular to a frameless motor for radar.
Background
Currently, radar is an electronic device that detects a target using electromagnetic waves. The radar emits electromagnetic waves to irradiate the target and receives echoes thereof, thereby obtaining information such as the distance from the target to the electromagnetic wave emission point, the distance change rate (radial velocity), the azimuth, the altitude and the like.
The transmitter and the receiver on the radar need to rotate continuously, motors used in the joint parts are specially customized, the distance between the motors and the outline structure of a common servo motor or a stepping motor is quite large, and the design requirement is quite high, so that a moment motor which can be directly arranged on the joint without a frame is needed.
Therefore, the company specially develops a frameless motor which can save space to the greatest extent in space.
Disclosure of Invention
An object of the present application is to provide a frameless motor for radar, so as to solve the problems set forth in the background art.
In order to achieve the above purpose, the application provides a frameless motor for radar, which adopts the following technical scheme:
the frameless motor for the radar comprises a stator and a rotor, wherein the stator is coaxially arranged in the rotor and is not contacted with the rotor;
the stator comprises a stator core and a stator coil, wherein the outer peripheral surface of the stator core is integrally and uniformly connected with a plurality of slot stator punching sheets, the longitudinal section of each slot stator punching sheet is of a T-shaped structure, the outer end surface of each slot stator punching sheet is outwards protruded to form an arc-shaped surface, the surface of the stator core is coated with an insulating layer, and the stator coil is wound on each slot stator punching sheet;
the rotor comprises a rotor core, a plurality of permanent magnets are fixed on the inner ring surface of the rotor core, arc-shaped surfaces matched with the rotor core are outwards protruded on the surfaces, close to the rotor core, of the permanent magnets, and the magnetic poles of two adjacent permanent magnets are different and are respectively an N-pole permanent magnet and an S-pole permanent magnet.
Preferably, the radius of an air gap formed between the arc-shaped surface of the slot stator punching sheet and the permanent magnet is set to be 0.2-1.5 mm.
By adopting the technical scheme, the power torque density of the frameless motor can be improved to a limited extent when the air gap radius is between 0.2 and 1.5 mm, the power torque density is suitable for the use of a radar, the high-speed performance can be simultaneously met, and the torque is good when the rotating speed is low.
Preferably, the number of the slot stator punching sheets is twelve, and the number of the permanent magnets is fourteen.
By adopting the technical scheme, the frameless motor adopts a twelve-slot fourteen-pole fractional slot concentrated winding mode, the fractional slots effectively reduce cogging torque, and the concentrated winding mode is adopted, so that the production cost is reduced.
The permanent magnet is adhered to the inner ring of the rotor core through glue.
In summary, the present application includes at least one of the following beneficial technical effects: the frameless motor for the radar can directly fix the stator core by using the joint of the radar, and realize power output by connecting an output joint shaft on the radar with the rotor core, can be directly embedded into the radar joint, meets the requirements of the radar on small volume, light weight and low inertia of the motor, and meanwhile, realizes insulation by adopting a special insulating paint spraying process on the surface of the stator core, so that a copper wire can be directly wound on a stator, and space can be saved to the greatest extent in space.
Drawings
Fig. 1 is a schematic overall structure of an embodiment of the present application.
Fig. 2 is a schematic structural view for embodying a stator core in an embodiment of the present application.
Fig. 3 is a schematic structural view for embodying a rotor in the embodiment of the present application.
Reference numerals illustrate: 1. a stator; 11. a stator core; 111. slot stator punching; 12. a stator coil; 2. a rotor; 21. a rotor core; 22. permanent magnets.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-3.
The embodiment of the application discloses a frameless motor for radar, which adopts a twelve-slot fourteen-pole fractional slot concentrated winding mode, and referring to figures 1-3, the frameless motor comprises a stator 1 and a rotor 2, wherein the stator 1 is coaxially arranged in the rotor 2, and the stator 1 and the rotor are not contacted with each other;
the stator 1 comprises a stator core 11 and a stator coil 12, twelve slot stator punching sheets 111 are integrally and uniformly connected to the outer peripheral surface of the stator core 11, the longitudinal section of each slot stator punching sheet 111 is of a T-shaped structure, the outer end surface of each slot stator punching sheet is outwards protruded to form an arc-shaped surface, the surface of the stator core 11 is coated with an insulating layer, and the stator coil 12 is wound on each slot stator punching sheet 111;
the rotor 2 comprises a rotor core 21, wherein the rotor core 21 is subjected to electroplating treatment to prevent rust, fourteen permanent magnets 22 are fixed on the inner ring surface of the rotor core 21 through glue, arc surfaces matched with the rotor core 21 are outwards protruded on the surfaces of the permanent magnets 22 close to the rotor core 21, and magnetic poles of two adjacent permanent magnets 22 are different and are respectively an N-pole permanent magnet 22 and an S-pole permanent magnet 22.
Through the technical scheme, the special part of the motor structural design is that the stator 1 and the rotor 2 of the motor are not contacted, the part of the inner stator 1 is only subjected to winding fixing treatment, the stator 1 cannot use an insulating framework due to thickness limitation, insulation is realized by adopting a special insulating paint spraying process, so that a copper wire can be directly wound on the stator 1, space can be saved to the greatest extent, meanwhile, the frameless motor adopts a twelve-slot fourteen-pole fractional-slot concentrated winding mode, the fractional slots effectively reduce cogging torque, and the concentrated winding mode is beneficial to reducing production cost.
Because the air gap radius is positively correlated with the torque, the larger the air gap radius is, the larger the torque value is, and the square value of the torque is positively correlated with the square value of the air gap radius, so that the air gap radius formed between the arc-shaped surface of the slot stator punching sheet 111 and the permanent magnet 22 is set to be 0.2-1.5 mm, the power torque density of the frameless motor can be improved to a limited extent, the torque is suitable for the use of a radar, the high-speed performance can be simultaneously satisfied, and the torque is very good at the time of low rotation speed.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape, principle and application direction are covered in the protection scope of the present application.
Claims (4)
1. A frameless motor for radar, characterized in that: comprises a stator (1) and a rotor (2), wherein the stator (1) is coaxially arranged in the rotor (2) and is not contacted with the rotor,
the stator (1) comprises a stator core (11) and a stator coil (12), a plurality of slot stator punching sheets (111) are integrally and uniformly connected to the outer peripheral surface of the stator core (11), the longitudinal section of each slot stator punching sheet (111) is of a T-shaped structure, the outer end surface of each slot stator punching sheet is outwards protruded to form an arc surface, the surface of the stator core (11) is coated with an insulating layer, the stator coil (12) is wound on the slot stator punching sheet (111),
the rotor (2) comprises a rotor core (21), a plurality of permanent magnets (22) are fixed on the inner ring surface of the rotor core (21), arc surfaces matched with the rotor core (21) are outwards protruded on the surface of the permanent magnets (22) close to the rotor core (21), and the magnetic poles of two adjacent permanent magnets (22) are different and are respectively an N-pole permanent magnet (22) and an S-pole permanent magnet (22).
2. The frameless motor for a radar according to claim 1, wherein: the radius of an air gap formed between the arc-shaped surface of the slot stator punching sheet (111) and the permanent magnet (22) is set to be 0.2-1.5 mm.
3. The frameless motor for a radar according to claim 1, wherein: the number of the slot stator punching sheets (111) is twelve, and the number of the permanent magnets (22) is fourteen.
4. The frameless motor for a radar according to claim 1, wherein: the permanent magnets (22) are adhered to the inner ring of the rotor core (21) through glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322052209.XU CN220732440U (en) | 2023-08-01 | 2023-08-01 | Frameless motor for radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322052209.XU CN220732440U (en) | 2023-08-01 | 2023-08-01 | Frameless motor for radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220732440U true CN220732440U (en) | 2024-04-05 |
Family
ID=90487684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322052209.XU Active CN220732440U (en) | 2023-08-01 | 2023-08-01 | Frameless motor for radar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220732440U (en) |
-
2023
- 2023-08-01 CN CN202322052209.XU patent/CN220732440U/en active Active
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