CN209823533U - Two-pole embedded brushless direct current motor rotor - Google Patents
Two-pole embedded brushless direct current motor rotor Download PDFInfo
- Publication number
- CN209823533U CN209823533U CN201921056494.XU CN201921056494U CN209823533U CN 209823533 U CN209823533 U CN 209823533U CN 201921056494 U CN201921056494 U CN 201921056494U CN 209823533 U CN209823533 U CN 209823533U
- Authority
- CN
- China
- Prior art keywords
- magnetic
- pole
- groove
- permanent magnet
- motor rotor
- 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
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model discloses an embedded brushless DC motor rotor of dipolar, establish in the pivot rotor core including pivot and cover, be equipped with first magnetic pole unit, second magnetic pole unit on the rotor core, and be used for reducing the first magnetic bridge that separates of magnetic leakage between first magnetic pole unit and the second magnetic pole unit, first magnetic pole unit includes the first magnetic groove that at least one radial was arranged, is equipped with first utmost point permanent magnet in every first magnetic groove, second magnetic pole unit includes the second magnetic groove that at least one radial was arranged, every be equipped with second dipolar permanent magnet in the second magnetic groove, the second magnetic groove corresponds the setting with first magnetic groove and is central symmetry and arranges. Embedded brushless DC motor rotor of dipolar have the advantage that reduces the magnetic leakage and avoid magnet to throw away the breakage.
Description
Technical Field
The utility model belongs to the technical field of a brushless motor technique and specifically relates to a embedded brushless DC motor rotor of dipolar.
Background
The vacuum cleaner is a cleaning electric appliance which utilizes a motor to drive a blade to rotate at a high speed, generates air negative pressure in a sealed shell and sucks dust and other sundries into a dust collecting bag. The electric blower of the dust collector is a core part of the dust collector and consists of two parts, namely a motor part and a blower part, and the electric blower of the dust collector has high requirement on the rotating speed, so that the conventional electric blower of the dust collector generally uses a brush motor, the rotating speed of the brush motor is usually between 2 ten thousand and 4 ten thousand revolutions, and although the rotating speed of the brush motor can meet the requirement of the electric blower of the dust collector, a commutator of the brush motor is fast in abrasion, short in service life, high in noise and low in performance. Compared with a brush motor, the brushless direct current motor adopts electronic commutation because the brush commutation is cancelled, the rotating speed can reach 6 to 10 thousands of revolutions, the service life reaches more than 2000 hours, and the noise can be effectively reduced.
The rotor of the brushless direct current motor comprises a rotating shaft and a neodymium iron boron magnetic ring arranged on the rotating shaft, and when the rotor rotates at a high speed, the neodymium iron boron magnetic ring is subjected to a great centrifugal force, so that the neodymium iron boron magnetic ring has a risk of being broken and separated from the rotating shaft. In order to fasten the ndfeb magnetic ring to the rotating shaft, a non-magnetic metal ring is usually sleeved on the outer circumferential surface of the ndfeb magnetic ring, however, when the rotor rotates at a high speed, a high frequency changing magnetic field generates a great eddy current loss in the metal ring, so that the operating efficiency of the brushless dc motor is reduced, the temperature is increased, and the magnetic ring is easily demagnetized. In addition, the conventional brushless direct current motor has a magnetic flux leakage phenomenon on a rotor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect, provide a reduce the magnetic leakage and avoid magnet to throw away broken embedded brushless DC motor rotor of dipolar.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an embedded brushless DC motor rotor of dipolar, establishes including pivot and cover change epaxial rotor core, last first magnetic pole unit, the second magnetic pole unit of being equipped with of rotor core, and be used for reducing the first magnetic bridge that separates of magnetic leakage between first magnetic pole unit and the second magnetic pole unit, first magnetic pole unit includes the first magnetic groove that at least one radial formula was arranged, is equipped with first utmost point permanent magnet in every first magnetic groove, second magnetic pole unit includes the second magnetic groove that at least one radial formula was arranged, every be equipped with second utmost point permanent magnet in the second magnetic groove, the second magnetic groove corresponds the setting with first magnetic groove and is central symmetry and arranges.
Preferably, the first magnetic isolation bridge is arranged between the adjacent first pole permanent magnet and the second pole permanent magnet, and the first magnetic isolation bridge is arranged close to the edge of the rotor core.
Preferably, the first magnetic isolation bridge is a circular through hole formed at an edge of the rotor core.
Preferably, the two ends of the first pole permanent magnet are respectively provided with a second magnetic isolation bridge, and the two ends of the second pole permanent magnet are respectively provided with a third magnetic isolation bridge.
Preferably, the number of the first magnetic grooves and the number of the second magnetic grooves are both M, and M is a natural number greater than or equal to 1.
Preferably, the first magnetic groove and the second magnetic groove are both rectangular grooves.
Preferably, the first pole permanent magnet is arranged in the first magnetic groove in a gluing or welding mode, and the second pole permanent magnet is arranged in the second magnetic groove in a gluing or welding mode.
Preferably, the rotor core has an outer circumferential surface, and a concave arc groove for reducing the cogging torque is formed by recessing the outer circumferential surface close to the first magnetic isolation bridge.
The utility model has the advantages that:
(1) through embedding first permanent magnet to first magnetic groove in, and with second permanent magnet embedding second magnetic groove in, reduced the quantity of the required material of preparation magnetic pole on the one hand, on the other hand can avoid first permanent magnet and second permanent magnet to be thrown away and broken problem when electric motor rotor is high-speed rotatory, has improved electric motor rotor's mechanical structure intensity, makes it more be fit for high-speed operation.
(2) Through setting up first magnetic bridge, second and third magnetic bridge that separates, effectively reduced the magnetic leakage between first magnetic pole unit and the second magnetic pole unit, between the first utmost point permanent magnet, and between the second utmost point permanent magnet.
Drawings
Fig. 1 is a schematic view of an embodiment of the present invention;
FIG. 2 is a schematic diagram of an embodiment of the present invention;
fig. 3 is a third schematic diagram of the embodiment of the present invention.
Reference numerals: 10. the magnetic rotor comprises a rotating shaft, 20, a rotor core, 21, a first magnetic pole unit, 211, a first magnetic slot, 212, a first pole permanent magnet, 22, a second magnetic pole unit, 221, a second magnetic slot, 222, a second pole permanent magnet, 23, a first magnetic isolation bridge, 24, a second magnetic isolation bridge, 25, a third magnetic isolation bridge, 26 and a concave arc slot.
Detailed Description
The technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention.
Fig. 1-3 show, do the utility model discloses an embedded brushless dc motor rotor of dipolar, including pivot 10 and rotor core 20, wherein, rotor core 20 cover is established on pivot 10, is equipped with first magnetic pole unit 21, second magnetic pole unit 22 and first magnetic bridge 23 that separates on rotor core 20, and first magnetic bridge 23 that separates is located first magnetic pole unit 21 and second magnetic pole unit 22 juncture for reduce the magnetic leakage between first magnetic pole unit 21 and the second magnetic pole unit 22.
In this embodiment, the first magnetic isolation bridge 23 is a circular through hole formed at the edge of the rotor core 20, and certainly, the structure of the first magnetic isolation bridge 23 is not limited to the circular through hole structure, and the first magnetic isolation bridge 23 can be set according to actual requirements during implementation, for example, the first magnetic isolation bridge 23 is set to be a square through hole formed at the edge of the rotor core 20.
As shown in fig. 1, the first magnetic pole unit 21 includes at least one first magnetic slot 211 radially arranged, and a first pole permanent magnet 212 is disposed in each first magnetic slot 211. The second magnetic pole unit 22 includes at least one second magnetic slot 221 arranged radially, each second magnetic slot 221 has a second pole permanent magnet 222 therein, the second magnetic slot 221 is arranged corresponding to the first magnetic slot 211 and arranged centrosymmetrically, and in specific implementation, the first magnetic slot 211 and the second magnetic slot 221 corresponding to the first magnetic slot 211 are preferably arranged in parallel.
Further, the first magnetic isolation bridge 23 is disposed between the adjacent first pole permanent magnet 212 and second pole permanent magnet 222, and the first magnetic isolation bridge 23 is disposed near the edge of the rotor core 20. Meanwhile, in order to reduce the magnetic flux leakage between the first pole permanent magnets 212 and between the second pole permanent magnets 222, the second magnetic isolation bridges 24 are respectively arranged at the two ends of the first pole permanent magnets 212, and the third magnetic isolation bridges 25 are respectively arranged at the two ends of the second pole permanent magnets 222.
In this embodiment, the first pole permanent magnet 212 is disposed in the first magnetic groove 211 by gluing or welding, and the second pole permanent magnet 222 is disposed in the second magnetic groove 221 by gluing or welding, and in specific implementation, it is most preferable that the first pole permanent magnet 212 and the second pole permanent magnet 222 are disposed in the first magnetic groove 211 and the second magnetic groove 221 by gluing. First magnetic pole unit 21 forms evenly distributed 'S utmost point magnetic field on rotor core 20 surface, and second magnetic pole unit 22 forms evenly distributed' S utmost point magnetic field on rotor core 20 surface, and of course, can set for according to actual need during the concrete implementation, make first magnetic pole unit 21 form evenly distributed 'S utmost point magnetic field on rotor core 20 surface, and second magnetic pole unit 22 forms evenly distributed' S utmost point magnetic field on rotor core 20 surface.
Furthermore, the number of the first magnetic slots 211 in the first magnetic pole unit 21 and the number of the second magnetic slots 221 in the second magnetic pole unit 22 are both M, where M is a natural number greater than or equal to 1. If the number of the first magnetic slots 211 in the first magnetic pole unit 21 and the number of the second magnetic slots 221 in the second magnetic pole unit 22 are both 1, as shown in fig. 1; also for example, the number of the first magnetic grooves 211 in the first magnetic pole unit 21 and the number of the second magnetic grooves 221 in the second magnetic pole unit 22 are both 2, as shown in fig. 2; also for example, the number of the first magnetic grooves 211 in the first magnetic pole unit 21 and the number of the second magnetic grooves 221 in the second magnetic pole unit 22 are both 3, as shown in fig. 3.
In this embodiment, the first magnetic slot 211 and the second magnetic slot 221 are rectangular slots, and in implementation, the first magnetic slot 211 and the second magnetic slot 221 may be configured according to actual requirements, for example, the first magnetic slot 211 and the second magnetic slot 221 are configured as arc slots or other irregular slots.
Compared with the prior art, the first pole permanent magnet 212 is embedded into the first magnetic groove 211, and the second pole permanent magnet 222 is embedded into the second magnetic groove 221, so that the amount of materials needed for manufacturing the magnetic poles is reduced, the problem that the first pole permanent magnet 212 and the second pole permanent magnet 222 are thrown out and broken when the motor rotor rotates at a high speed can be avoided, the mechanical structure strength of the motor rotor is improved, and the motor rotor is more suitable for high-speed operation.
As shown in fig. 2, the rotor core 20 has an outer circumferential surface, and in order to reduce cogging torque, the outer circumferential surface of the rotor core 20 near the first magnetic bridges 23 is recessed inward to form concave arc grooves 26.
The embedded brushless DC motor rotor of dipolar can be used but not limited to dipolar three-groove three-phase brushless DC motor, dipolar six-groove three-phase brushless DC motor, dipolar two-groove single-phase brushless DC motor and dipolar four-groove single-phase brushless DC motor, has wide advantage of application scope.
The technical contents and features of the present invention have been disclosed as above, however, those skilled in the art can still make various substitutions and modifications based on the teaching and disclosure of the present invention without departing from the spirit of the present invention, therefore, the protection scope of the present invention should not be limited to the contents disclosed in the embodiments, but should include various substitutions and modifications without departing from the present invention, and should be covered by the claims of the present patent application.
Claims (8)
1. The utility model provides an embedded brushless DC motor rotor of dipolar, its characterized in that establishes including pivot and cover epaxial rotor core, last first magnetic pole unit, the second magnetic pole unit of being equipped with of rotor core, and be used for reducing the first magnetic bridge that separates of magnetic leakage between first magnetic pole unit and the second magnetic pole unit, first magnetic pole unit includes the first magnetic groove that at least one radial formula was arranged, is equipped with first utmost point permanent magnet in every first magnetic groove, second magnetic pole unit includes the second magnetic groove that at least one radial formula was arranged, every be equipped with second utmost point permanent magnet in the second magnetic groove, the second magnetic groove corresponds the setting with first magnetic groove and is central symmetry and arranges.
2. The two-pole embedded brushless direct current motor rotor according to claim 1, wherein the first magnetic isolation bridge is disposed between adjacent first pole permanent magnets and second pole permanent magnets, and the first magnetic isolation bridge is disposed near an edge of the rotor core.
3. The two-pole embedded brushless dc motor rotor according to claim 1 or 2, wherein the first magnetic isolation bridge is a circular through hole formed at an edge of a rotor core.
4. The two-pole embedded brushless DC motor rotor according to claim 1, wherein two ends of the first pole permanent magnet are respectively provided with a second magnetic isolation bridge, and two ends of the second pole permanent magnet are respectively provided with a third magnetic isolation bridge.
5. The two-pole embedded brushless DC motor rotor according to claim 1, wherein the number of the first magnetic slots and the second magnetic slots is M, M is a natural number greater than or equal to 1.
6. The two-pole embedded brushless DC motor rotor according to claim 1, wherein the first and second magnetic slots are rectangular slots.
7. The two-pole embedded brushless direct current motor rotor according to claim 1, wherein the first pole permanent magnet is disposed in the first magnetic slot by gluing or welding, and the second pole permanent magnet is disposed in the second magnetic slot by gluing or welding.
8. The two-pole embedded brushless direct current motor rotor according to claim 1, wherein the rotor core has an outer circumferential surface, and a concave arc groove for reducing cogging torque is formed by recessing the outer circumferential surface adjacent to the first magnetic isolation bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921056494.XU CN209823533U (en) | 2019-07-08 | 2019-07-08 | Two-pole embedded brushless direct current motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921056494.XU CN209823533U (en) | 2019-07-08 | 2019-07-08 | Two-pole embedded brushless direct current motor rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209823533U true CN209823533U (en) | 2019-12-20 |
Family
ID=68885192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921056494.XU Active CN209823533U (en) | 2019-07-08 | 2019-07-08 | Two-pole embedded brushless direct current motor rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209823533U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224516A (en) * | 2019-07-08 | 2019-09-10 | 苏州市润豪电机有限公司 | A kind of two extremely embedded brushless DC motor rotors |
-
2019
- 2019-07-08 CN CN201921056494.XU patent/CN209823533U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224516A (en) * | 2019-07-08 | 2019-09-10 | 苏州市润豪电机有限公司 | A kind of two extremely embedded brushless DC motor rotors |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2557556C2 (en) | Squirrel-cage rotor | |
| CN110247484A (en) | Food processor and stator core, motor for food processor | |
| CN107359767A (en) | A kind of Halbach types array permanent magnetism disc type iron core-free hollow shaft motor | |
| CN100561829C (en) | Magnetic flux inverse type electric motor | |
| CN209282957U (en) | A kind of rotor and the motor with it | |
| CN202417973U (en) | Minitype axial flow type brushless direct current air pump | |
| CN209823533U (en) | Two-pole embedded brushless direct current motor rotor | |
| CN209913682U (en) | Two-pole embedded brushless direct current motor | |
| CN207625414U (en) | A kind of Halbach types array permanent magnetism disc type iron core-free hollow shaft motor | |
| CN210469084U (en) | High-speed single-phase brushless direct current motor | |
| CN207939273U (en) | Food processor and stator core, motor for food processor | |
| CN212086040U (en) | Double-stator switched reluctance motor | |
| CN207939431U (en) | Food cooking machine and its electrification cue circuit | |
| CN110224516A (en) | A kind of two extremely embedded brushless DC motor rotors | |
| WO2008077286A1 (en) | Nd-fe-b dc motor | |
| CN107733117B (en) | A kind of angle grinder reluctance machine | |
| CN212726733U (en) | Embedded centrifugal impeller device of gumming of high-speed permanent-magnet machine | |
| CN110932511A (en) | 128-type 12-slot 10-ultrahigh-power permanent magnet synchronous motor | |
| US10069358B2 (en) | Rotor of electric motor with permanent magnets | |
| CN211039110U (en) | Single-phase brushless direct current electric fan | |
| CN110311528A (en) | A kind of two extremely embedded brshless DC motors | |
| CN204376544U (en) | Portable suction cleaner using motor | |
| CN109450124B (en) | Stator core wire hanging framework, stator core and high-speed motor | |
| CN110247531A (en) | Food processor and motor for food processor | |
| CN217486249U (en) | Rotor structure of magnetic-gathering motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |