CN215956143U - Slotless brushless motor with multi-pole rotor - Google Patents
Slotless brushless motor with multi-pole rotor Download PDFInfo
- Publication number
- CN215956143U CN215956143U CN202121579104.4U CN202121579104U CN215956143U CN 215956143 U CN215956143 U CN 215956143U CN 202121579104 U CN202121579104 U CN 202121579104U CN 215956143 U CN215956143 U CN 215956143U
- Authority
- CN
- China
- Prior art keywords
- magnetic steel
- rotor
- pole
- brushless motor
- sleeve
- 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.)
- Active
Links
Images
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model discloses a slotless brushless motor with a multipolar rotor, which comprises a machine shell, wherein a stator component and a multipolar rotor component are arranged in a cavity of the machine shell, the multipolar rotor component comprises a magnetic steel sleeve, a shaft and multipolar magnetic steel, and the multipolar magnetic steel is connected to the surface of the magnetic steel sleeve through an epoxy resin layer. The multi-pole magnetic steel adopts two or more pairs of poles for magnetizing, so that the distribution of the air gap magnetic field of the motor is more uniform, namely, the magnetic field strength concentrated by one pair of poles is uniformly distributed, the partial magnetic field of a magnetic yoke (a slotless iron core) is not excessively concentrated, the eddy current loss of the motor is effectively reduced, and the distributed magnetic field distribution enables the motor to provide more stable output torque. The magnetic steel sleeve in the multi-pole rotor can be precisely machined, the matching degree with multi-pole magnetic steel and a shaft is good, and the balance of the multi-pole rotor is more stable.
Description
Technical Field
The present invention relates to brushless motors, and more particularly, to a slotless brushless motor having a multipolar rotor.
Background
The existing brushless motor generally comprises a stator assembly and a rotor assembly, wherein the rotor assembly is directly connected to the shaft, the shaft rotates to drive the rotor assembly to rotate, the internal control machining process of the magnet of the traditional rotor assembly is difficult, the internal control size is difficult to control, a gap is generated when the rotor is matched with the shaft, and the balance of the rotor is unstable.
SUMMERY OF THE UTILITY MODEL
The object of the present invention is to provide a slotless brushless motor with a multipolar rotor, which addresses the above-mentioned drawbacks of the prior art.
In order to solve the above defects in the prior art, the technical scheme provided by the utility model is as follows: a slotless brushless motor with a multipole rotor comprises a machine shell, wherein a stator assembly and a multipole rotor assembly are arranged in a cavity of the machine shell, the multipole rotor assembly comprises a magnetic steel sleeve, a shaft and multipole magnetic steel, and the multipole magnetic steel is connected to the surface of the magnetic steel sleeve through an epoxy resin layer.
The multi-pole magnetic steel is provided with S-pole magnetic steel and N-pole magnetic steel, the S-pole magnetic steel and the N-pole magnetic steel are arranged at intervals to form a circle, and the S-pole magnetic steel and the N-pole magnetic steel have minimum two pairs of poles for magnetizing.
As an improvement of the slotless brushless motor with the multipolar rotor, the cross section of each S-pole magnetic steel and each N-pole magnetic steel is in a sector shape, and the inner side surfaces of the S-pole magnetic steel and the N-pole magnetic steel are bonded on the surface of the magnetic steel sleeve through the epoxy resin layer.
As an improvement of the slotless brushless motor with the multipolar rotor of the present invention, one end of the epoxy resin layer is sealed by a sealing block, and one end of the shaft is penetrated on the sealing block.
As an improvement of the slotless brushless motor with the multipolar rotor, the cavity of the casing is also provided with an installation sleeve, two ends of the installation sleeve are respectively provided with a bearing, and the shaft penetrates through the two bearings.
As an improvement of the slotless brushless motor with the multi-pole rotor of the present invention, the stator assembly includes a winding cup and a stator sleeve, the stator sleeve is sleeved on the outer surface of the winding cup, and the multi-pole rotor assembly is inserted into the winding cup.
As an improvement of the slotless brushless motor with the multipolar rotor of the present invention, the winding cup is composed of three independent winding sheets, the three independent winding sheets are circularly arranged, and the cross section of the winding sheet is arc-shaped.
As an improvement of the slotless brushless motor with the multi-pole rotor, the stator sleeve is formed by overlapping and combining a plurality of circular silicon steel sheets.
As an improvement of the slotless brushless motor with the multi-pole rotor, one end of the casing is provided with a bracket and a rear cover, a PCB is arranged between the bracket and the rear cover, and the rear cover is provided with a copper needle which is electrically connected with the PCB.
As an improvement of the slotless brushless motor with the multipolar rotor, a gasket is arranged in the cavity of the casing, and the magnetic steel sleeve is propped against the gasket when being sleeved on the mounting sleeve.
Compared with the prior art, the utility model has the advantages that: the multi-pole magnetic steel adopts two or more pairs of poles for magnetizing, so that the distribution of the air gap magnetic field of the motor is more uniform, namely, the magnetic field strength concentrated by one pair of poles is uniformly distributed, the partial magnetic field of a magnetic yoke (a slotless iron core) is not excessively concentrated, the eddy current loss of the motor is effectively reduced, and the distributed magnetic field distribution enables the motor to provide more stable output torque. The magnetic steel sleeve in the multi-pole rotor can be precisely machined, the matching degree with multi-pole magnetic steel and a shaft is good, and the balance of the multi-pole rotor is more stable. The stator sleeve (magnetic yoke) part is formed by overlapping and combining circular silicon steel sheets, has no tooth grooves, ensures that the motor has no tooth groove effect, is more suitable for precise control, and effectively reduces the eddy current loss of the motor.
Drawings
The utility model and its advantageous technical effects are described in further detail below with reference to the accompanying drawings and detailed description, in which:
fig. 1 is a perspective view of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
Fig. 3 is a cross-sectional view of a multi-pole rotor assembly of the present invention.
FIG. 4 is a schematic view of the side structure of the multi-pole magnetic steel of the present invention.
Fig. 5 is a schematic diagram of the winding cup structure of the present invention.
Fig. 6 is a top view of the winding cup of the present invention.
Fig. 7 is a front view of a single winding piece of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1 to 7, a slotless brushless motor with a multi-pole rotor comprises a casing 1, a stator assembly 2 and a multi-pole rotor assembly 3 are arranged in a cavity of the casing 1, the multi-pole rotor assembly 3 comprises a magnetic steel sleeve 31, a shaft 32 and multi-pole magnetic steel 33, and the multi-pole magnetic steel 33 is connected to the surface of the magnetic steel sleeve 31 through an epoxy resin layer 34. One end of the epoxy layer 34 is sealed by a sealing block 35, and one end of the shaft 32 is inserted into the sealing block 35. The epoxy layer 34 and the sealing block 35 are of an integral structure.
Preferably, the multi-pole magnetic steel 33 has S-pole magnetic steel 331 and N-pole magnetic steel 332, the S-pole magnetic steel 331 and the N-pole magnetic steel 332 are arranged at intervals to surround a circle, and the S-pole magnetic steel 331 and the N-pole magnetic steel 332 have at least two pairs of poles for magnetizing. Two pairs of poles or a plurality of pairs of poles are magnetized, so that the distribution of the air gap magnetic field of the motor is more uniform, namely, the magnetic field intensity of one pair of poles is uniformly distributed, the partial magnetic field of a magnetic yoke (a slotless iron core) is not excessively concentrated, the eddy current loss of the motor is effectively reduced, and the distributed magnetic field of the motor can provide more stable output torque.
Preferably, the cross section of each of the S-pole magnetic steel 331 and the N-pole magnetic steel 332 is fan-shaped, and the inner side surfaces of the S-pole magnetic steel 331 and the N-pole magnetic steel 332 are adhered to the surface of the magnetic steel sleeve 31 through the epoxy resin layer 34.
Preferably, an installation sleeve 4 is further disposed in the cavity of the casing 1, bearings 5 are respectively disposed at two ends of the installation sleeve 4, and the shaft 32 is disposed through the two bearings 5. The installation sleeve 4 is arranged in the magnetic steel sleeve 31 in a penetrating mode, the space for installing the rotor can be reduced, the overall structure of the motor is more compact, and the size of the motor is smaller.
Preferably, the stator assembly 2 includes a winding cup 21 and a stator sleeve 22 (magnetic yoke), the stator sleeve 22 is sleeved on the outer surface of the winding cup 21, and the multi-pole rotor assembly 3 is inserted into the winding cup 21. The stator sleeve 22 (magnetic yoke) is formed by overlapping and combining circular silicon steel sheets, has no tooth grooves, ensures that the motor has no tooth groove effect, is more suitable for precise control, and effectively reduces the eddy current loss of the motor.
Preferably, the winding cup 21 is composed of three independent winding sheets 211, the three independent winding sheets 211 are arranged in a circular shape, and the cross section of each winding sheet 211 is arc-shaped. The winding cup 21 is composed of 3 or more than 3 (integral multiple of 3) winding sheets 211, a rectangle is used as a mold core, a plurality of coils are wound, the coils are bent into tile shapes (or arc shapes), then the coils are spliced into a cylindrical shape, and the coils are connected in a three-phase Y-shaped connection mode.
The winding sheets 211 of the winding cup 21 have no overlapping interference in each phase, and the whole coil generates an effective magnetic field.
Preferably, one end of the case 1 is provided with a support 6 and a rear cover 7, a PCB 8 is arranged between the support 6 and the rear cover 7, the rear cover 7 is provided with a copper pin 9, and the copper pin 9 is electrically connected with the PCB 8.
Preferably, a gasket 10 is further disposed in the cavity of the casing 1, and the magnetic steel sleeve 31 abuts against the gasket 10 when being sleeved on the mounting sleeve 4. The magnetic steel sleeve 31 can be prevented from rubbing against the casing 1.
The utility model adopts the magnetic steel sleeve 31 made of magnetic conductive material, and the multipolar magnetic steel is directly bonded on the bonding surface of the magnetic steel sleeve 31 through the epoxy resin layer 36. The magnetic steel sleeve 31 is connected with the shaft in a bonding mode through the epoxy resin layer 36, when the shaft rotates, the magnetic steel sleeve and the multi-pole magnetic steel also rotate along with the shaft, the magnetic steel sleeve in the multi-pole rotor can be precisely machined, the matching degree of the magnetic steel sleeve with the multi-pole magnetic steel and the shaft is good, and the balance of the multi-pole rotor is more stable.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and arrangements of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A slotless brushless motor with a multipole rotor comprises a machine shell and is characterized in that a stator assembly and a multipole rotor assembly are arranged in a cavity of the machine shell, the multipole rotor assembly comprises a magnetic steel sleeve, a shaft and multipole magnetic steel, and the multipole magnetic steel is connected to the surface of the magnetic steel sleeve through an epoxy resin layer.
2. The slotless brushless motor having a multipole rotor according to claim 1, wherein the multipole magnet has S-pole magnet steel and N-pole magnet steel, the S-pole magnet steel and the N-pole magnet steel being spaced apart to enclose a circle, the S-pole magnet steel and the N-pole magnet steel having a minimum of two pairs of pole magnetizing.
3. The slotless brushless motor having a multipolar rotor of claim 2, wherein each of the S-pole magnetic steel and the N-pole magnetic steel has a sector shape in cross section, and inner side faces of the S-pole magnetic steel and the N-pole magnetic steel are bonded to a surface of the magnetic steel sleeve through the epoxy resin layer.
4. The slotless brushless motor having a multipolar rotor of claim 1, wherein an end of the epoxy layer is sealed by a sealing block, and an end of the shaft is penetrated on the sealing block.
5. The slotless brushless motor with a multipolar rotor as recited in claim 1, wherein a mounting sleeve is further provided in the cavity of the housing, bearings are provided at both ends of the mounting sleeve, respectively, and the shaft is inserted through both of the bearings.
6. The slotless brushless motor having a multipole rotor of claim 1, wherein the stator assembly includes a winding cup and a stator can, the stator can being disposed over an outer surface of the winding cup, the multipole rotor assembly being disposed through the winding cup.
7. The slotless brushless motor having a multipolar rotor of claim 6 wherein the winding cup is composed of three independent winding pieces arranged in a circle, the winding pieces having an arc-shaped cross section.
8. The slotless brushless motor having a multipole rotor of claim 6, wherein the stator can is formed by overlapping a plurality of circular silicon steel sheets.
9. The slotless brushless motor having a multipolar rotor of claim 1, wherein one end of the case is provided with a bracket and a rear cover, a PCB board is provided between the bracket and the rear cover, and the rear cover is provided with copper pins electrically connected with the PCB board.
10. The slotless brushless motor having a multipole rotor of claim 5, wherein a gasket is further disposed in the cavity of the housing, and the sleeve of magnetic steel abuts against the gasket when the sleeve of magnetic steel is fitted over the mounting sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121579104.4U CN215956143U (en) | 2021-07-13 | 2021-07-13 | Slotless brushless motor with multi-pole rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121579104.4U CN215956143U (en) | 2021-07-13 | 2021-07-13 | Slotless brushless motor with multi-pole rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215956143U true CN215956143U (en) | 2022-03-04 |
Family
ID=80437263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121579104.4U Active CN215956143U (en) | 2021-07-13 | 2021-07-13 | Slotless brushless motor with multi-pole rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215956143U (en) |
-
2021
- 2021-07-13 CN CN202121579104.4U patent/CN215956143U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3146492B2 (en) | Brushless DC motor | |
| JP3535012B2 (en) | Radial gap type small cylindrical rotating electric machine | |
| GB2565473A (en) | Consequent-pole rotor, electric motor, and air conditioner | |
| JP2013135541A (en) | Axial gap rotary electric machine | |
| JP6545393B2 (en) | Conscious pole rotor, motor and air conditioner | |
| JP2010161896A (en) | Rotor of permanent-magnet-type rotary electric machine | |
| GB2563613A (en) | A brushless motor and stator therefor | |
| US20230253838A1 (en) | Electric motor | |
| JP5267751B1 (en) | Rotating electric machine | |
| JP5128928B2 (en) | Brushless motor | |
| JPWO2022019074A5 (en) | ||
| CN114374285B (en) | Permanent magnet rotor structure, permanent magnet motor and electric automobile | |
| CN115102352A (en) | Micro-specific limited angle torque motor | |
| CN215956143U (en) | Slotless brushless motor with multi-pole rotor | |
| JP2001069696A (en) | Permanent magnet type synchronous motor | |
| JP4491211B2 (en) | Permanent magnet rotating electric machine | |
| CN220711192U (en) | Built-in integrated drive miniature multipolar hollow cup brushless motor | |
| CN215528717U (en) | Motor stator assembly and servo motor | |
| CN107046353B (en) | Motor and compressor with same | |
| JPH0530137B2 (en) | ||
| CN212518578U (en) | Rotor unit and hybrid excitation motor | |
| JP3999358B2 (en) | Cylindrical radial gap type rotating electrical machine | |
| CN113726059B (en) | Permanent magnet motor | |
| CN212162954U (en) | Surface-mounted rotor structure and motor | |
| CN220711241U (en) | Miniature multipolar hollow cup brushless motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |