CN110224516A - A kind of two extremely embedded brushless DC motor rotors - Google Patents
A kind of two extremely embedded brushless DC motor rotors Download PDFInfo
- Publication number
- CN110224516A CN110224516A CN201910610990.3A CN201910610990A CN110224516A CN 110224516 A CN110224516 A CN 110224516A CN 201910610990 A CN201910610990 A CN 201910610990A CN 110224516 A CN110224516 A CN 110224516A
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- China
- Prior art keywords
- magnetic
- slot
- pole
- permanent magnet
- pole unit
- 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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- 238000004026 adhesive bonding Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 230000005389 magnetism Effects 0.000 claims 2
- 239000000428 dust Substances 0.000 description 8
- 229910001172 neodymium magnet Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- PXAWCNYZAWMWIC-UHFFFAOYSA-N [Fe].[Nd] Chemical compound [Fe].[Nd] PXAWCNYZAWMWIC-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
Abstract
Present invention discloses a kind of two extremely embedded brushless DC motor rotors, including shaft and the rotor core being set in shaft, rotor core is equipped with the first magnetic pole unit, second magnetic pole unit, and the first magnetic bridge for reducing leakage field between the first magnetic pole unit and the second magnetic pole unit, first magnetic pole unit includes the first magnetic slot of at least one radial arrangement, the first pole permanent magnet is equipped in each first magnetic slot, second magnetic pole unit includes the second magnetic slot of at least one radial arrangement, the second pole permanent magnet is equipped in each second magnetic slot, the second magnetic slot and the first magnetic slot are correspondingly arranged and the arrangement that is centrosymmetric.Of the present invention two extremely embedded brushless DC motor rotors have the advantages that reduce leakage field and to avoid magnet from throwing away broken.
Description
Technical field
The present invention relates to a kind of brushless motor technical fields, turn more particularly, to a kind of two extremely embedded brshless DC motors
Son.
Background technique
Dust catcher is air negative pressure to be generated in the shell of sealing, by dust etc. using motor band movable vane piece high speed rotation
Sundries sucks the cleaning appliance in dust bag.Dust catcher electric fan is the core component of dust catcher, is made of two parts, motor section
Point and fan section, due to dust catcher electric fan revolving speed is required it is very high, conventional dust catcher electric fan is generally using having
Brush motor, revolving speed usually between 20,000~40,000 turns, although revolving speed can meet the requirement of dust catcher electric fan, have
The commutator wear of brush motor is fast, and the service life is short, and noise is big, and performance is low.Brshless DC motor is with respect to brush motor due to eliminating
Brush-commutated and use electronic commutation, revolving speed can achieve 60,000 and go to 100,000 turns, and the service life reaches 2000 hours or more and can be with
Noise is effectively reduced.
Brushless DC motor rotor includes shaft, and the magnetic Nd-Fe-B ring in shaft, neodymium iron when rotor high speed rotation
Boron magnet ring is by great centrifugal force, and there are the risks that fragmentation is detached from shaft for magnetic Nd-Fe-B ring.To be anchored on magnetic Nd-Fe-B ring
In shaft, non-magnetic becket is usually arranged on magnetic Nd-Fe-B ring outer circumference surface, however high frequency becomes when rotor high speed rotation
The magnetic field of change can generate great eddy-current loss in becket, so that the working efficiency of brshless DC motor reduces and temperature
It increases, and magnet ring is easy to cause to demagnetize.In addition, on traditional brushless DC motor rotor, there are magnetic flux leakages.
Summary of the invention
It is an object of the invention to overcome the deficiencies of existing technologies, a kind of reduction leakage field is provided and to avoid magnet from throwing away broken
Two extremely embedded brushless DC motor rotors.
To achieve the above object, the following technical solutions are proposed by the present invention: a kind of two extremely embedded brushless DC motor rotors,
Including shaft and the rotor core being set in the shaft, the rotor core is equipped with the first magnetic pole unit, the second magnetic pole
Unit, and the first magnetic bridge for reducing leakage field between the first magnetic pole unit and the second magnetic pole unit, the first magnetic pole list
Member includes the first magnetic slot of at least one radial arrangement, is equipped with the first pole permanent magnet, second magnetic in each first magnetic slot
Pole unit includes the second magnetic slot of at least one radial arrangement, is equipped with the second pole permanent magnet, institute in each second magnetic slot
It states the second magnetic slot and the first magnetic slot is correspondingly arranged and the arrangement that is centrosymmetric.
Preferably, first magnetic bridge is set between adjacent the first pole permanent magnet and the second pole permanent magnet, and described
First magnetic bridge is arranged close to the edge of the rotor core.
Preferably, first magnetic bridge is the circular through hole for being formed in rotor core edge.
Preferably, the both ends of first pole permanent magnet are respectively equipped with the second magnetic bridge, and the two of second pole permanent magnet
End is respectively equipped with third magnetic bridge.
Preferably, the quantity of the first magnetic slot and the second magnetic slot is M, and M is the natural number more than or equal to 1.
Preferably, the first magnetic slot and the second magnetic slot are rectangular channel.
Preferably, first pole permanent magnet is set in the first magnetic slot by way of gluing or welding, and described the
Dipolar permanent body is set in the second magnetic slot by way of gluing or welding.
Preferably, the rotor core has periphery, and the periphery close to first magnetic bridge is recessed inwardly to be formed
There is the concave arc slot for reducing cogging torque.
The beneficial effects of the present invention are:
(1) by the way that the first permanent magnet to be embedded in the first magnetic slot, and the second permanent magnet is embedded in the second magnetic slot, a side
Face reduces the dosage of production magnetic pole material requested, on the other hand can avoid the first permanent magnet and the when rotor high speed rotation
Two permanent magnets are thrown out of and broken problem, improve the Mechanical Structure Strength of rotor, it is made to be more suitable for high-speed cruising.
(2) by the first magnetic bridge of setting, the second magnetic bridge and third magnetic bridge, effectively reduce the first magnetic pole unit with
Leakage field between second magnetic pole unit, between the first pole permanent magnet and between the second pole permanent magnet.
Detailed description of the invention
Fig. 1 is one schematic diagram of the embodiment of the present invention；
Fig. 2 is one schematic diagram of the embodiment of the present invention；
Fig. 3 is three schematic diagram of the embodiment of the present invention.
Appended drawing reference: 10, shaft, 20, rotor core, the 21, first magnetic pole unit, the 211, first magnetic slot, the 212, first pole
Permanent magnet, the 22, second magnetic pole unit, the 221, second magnetic slot, the 222, second pole permanent magnet, the 23, first magnetic bridge, 24, second every
Magnetic bridge, 25, third magnetic bridge, 26, concave arc slot.
Specific embodiment
Below in conjunction with attached drawing of the invention, clear, complete description is carried out to the technical solution of the embodiment of the present invention.
It is disclosed two extremely embedded brushless DC motor rotors, including 10 He of shaft shown in FIG. 1 to FIG. 3
Rotor core 20, wherein rotor core 20 is set in shaft 10, and rotor core 20 is equipped with the first magnetic pole unit 21, second
Magnetic pole unit 22 and the first magnetic bridge 23, the first magnetic bridge 23 is set to the first magnetic pole unit 21 and the second magnetic pole unit 22 has a common boundary
Place, for reducing the leakage field between the first magnetic pole unit 21 and the second magnetic pole unit 22.
In the present embodiment, the first magnetic bridge 23 is the circular through hole for being formed in 20 edge of rotor core, certainly, first every
23 structure of magnetic bridge is not limited to circular through hole structure, and the structure of the first magnetic bridge 23 can be arranged in when implementation according to actual needs, such as
The first magnetic bridge 23 is set to be formed in the square through hole etc. of 20 edge of rotor core.
As shown in Figure 1, first magnetic slot 211 of first magnetic pole unit 21 including the arrangement of at least one radial, each first
The first pole permanent magnet 212 is equipped in magnetic slot 211.Second magnetic pole unit 22 includes the second magnetic slot of at least one radial arrangement
221, be equipped with the second pole permanent magnet 222 in each second magnetic slot 221, the second magnetic slot 221 and the first magnetic slot 211 be correspondingly arranged and
Be centrosymmetric arrangement, when it is implemented, with the first magnetic slot 211 and parallel with the corresponding second magnetic slot 221 of the first magnetic slot 211 setting
It is set to best.
Further, first magnetic bridge is set between adjacent the first pole permanent magnet 212 and the second pole permanent magnet 222
23, and first magnetic bridge 23 is arranged close to 20 edge of rotor core.Meanwhile in order to reduce by the first pole permanent magnet 212
Between and the second pole permanent magnet 222 between leakage field, the both ends of the first pole permanent magnet 212 are respectively equipped with the second magnetic bridge 24, the second pole
The both ends of permanent magnet 222 are respectively equipped with third magnetic bridge 25.
In the present embodiment, the first pole permanent magnet 212 is set in the first magnetic slot 211 by way of gluing or welding, and second
Pole permanent magnet 222 is set in the second magnetic slot 221 by way of gluing or welding, when it is implemented, with the first pole permanent magnet 212
It is best for being respectively arranged in the first magnetic slot 211 and the second magnetic slot 221 with the second pole permanent magnet 222 by adhesive means.First magnetic
Pole unit 21 forms equally distributed N pole field on 20 surface of rotor core, and the second magnetic pole unit 22 is on 20 surface of rotor core
Equally distributed S pole field is formed, certainly, when specific implementation can be set according to actual needs, make the first magnetic pole unit 21
Equally distributed S pole field is formed on 20 surface of rotor core, the second magnetic pole unit 22 is formed uniformly on 20 surface of rotor core
The N pole field of distribution.
Further, in the first magnetic pole unit 21 quantity of first magnetic slot 211 and in the second magnetic pole unit 22 second
The quantity of magnetic slot 221 is M, and M is the natural number more than or equal to 1.Such as the quantity of the first magnetic slot 211 in the first magnetic pole unit 21
Quantity with the second magnetic slot 221 in the second magnetic pole unit 22 is 1, as shown in Figure 1；For another example the first magnetic in the first magnetic pole unit 21
The quantity of second magnetic slot 221 is 2 in the quantity of slot 211 and the second magnetic pole unit 22, as shown in Figure 2；For another example the first magnetic pole list
The quantity of first magnetic slot 211 and the quantity of the second magnetic slot 221 in the second magnetic pole unit 22 are 3 in member 21, as shown in Figure 3.
In the present embodiment, the first magnetic slot 211 and the second magnetic slot 221 are rectangular channel, when implementation, can be arranged according to actual needs
Such as arc-shaped slot is arranged in first magnetic slot 211 and the second magnetic slot 221 by the structure of the first magnetic slot 211 and the second magnetic slot 221, or
The slot of other irregular shapes.
Compared with prior art, by the way that the first pole permanent magnet 212 is embedded in the first magnetic slot 211, and forever by the second pole
Magnet 222 is embedded in the second magnetic slot 221, and the dosage of material requested, on the other hand can avoid when on the one hand reducing production magnetic pole
The first pole permanent magnet 212 and the second pole permanent magnet 222 are thrown out of and broken problem when rotor high speed rotation, improve electricity
The Mechanical Structure Strength of machine rotor, makes it be more suitable for high-speed cruising.
As shown in Fig. 2, rotor core 20 has periphery, in order to reduce cogging torque, rotor core 20 close to first every
Periphery at magnetic bridge 23, which is recessed inwardly, is formed with concave arc slot 26.
Of the present invention two extremely embedded brushless DC motor rotors can be applied but be not limited to two pole, three slot three-phase brushless
Direct current generator, four slot brushless single phase of two pole, six slot three-phase brushless dc motor, two pole, two slot single-phase brushless direct-current motor and two pole
Direct current generator has the advantages that applied widely.
Technology contents and technical characteristic of the invention have revealed that as above, however those skilled in the art still may base
Make various replacements and modification without departing substantially from spirit of that invention, therefore, the scope of the present invention in teachings of the present invention and announcement
It should be not limited to the revealed content of embodiment, and should include various without departing substantially from replacement and modification of the invention, and be this patent Shen
Please claim covered.
Claims (8)
1. the extremely embedded brushless DC motor rotor of one kind two, which is characterized in that including shaft and be set in the shaft
Rotor core, the rotor core be equipped with the first magnetic pole unit, the second magnetic pole unit, and for reduce the first magnetic pole unit with
First magnetic bridge of leakage field between second magnetic pole unit, first magnetic pole unit include the first of at least one radial arrangement
Magnetic slot, each first magnetic slot is interior to be equipped with the first pole permanent magnet, and second magnetic pole unit includes what at least one radial was arranged
Second magnetic slot, is equipped with the second pole permanent magnet in each second magnetic slot, the second magnetic slot and the first magnetic slot be correspondingly arranged and
Be centrosymmetric arrangement.
2. according to claim 1 two extremely embedded brushless DC motor rotors, which is characterized in that the first adjacent pole is forever
First magnetic bridge is set between magnet and the second pole permanent magnet, and first magnetic bridge is close to the side of the rotor core
Edge setting.
3. according to claim 1 or 2 two extremely embedded brushless DC motor rotors, which is characterized in that described first every
Magnetic bridge is the circular through hole for being formed in rotor core edge.
4. according to claim 1 two extremely embedded brushless DC motor rotors, which is characterized in that first pole permanent magnetism
The both ends of body are respectively equipped with the second magnetic bridge, and the both ends of second pole permanent magnet are respectively equipped with third magnetic bridge.
5. according to claim 1 two extremely embedded brushless DC motor rotors, which is characterized in that the first magnetic slot and
The quantity of second magnetic slot is M, and M is the natural number more than or equal to 1.
6. according to claim 1 two extremely embedded brushless DC motor rotors, which is characterized in that the first magnetic slot and
Second magnetic slot is rectangular channel.
7. according to claim 1 two extremely embedded brushless DC motor rotors, which is characterized in that first pole permanent magnetism
Body is set in the first magnetic slot by way of gluing or welding, and second pole permanent magnet is by way of gluing or welding
In the second magnetic slot.
8. according to claim 1 two extremely embedded brushless DC motor rotors, which is characterized in that the rotor core tool
There is periphery, is recessed inwardly close to the periphery of first magnetic bridge and is formed with the concave arc slot for reducing cogging torque.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910610990.3A CN110224516A (en) | 2019-07-08 | 2019-07-08 | A kind of two extremely embedded brushless DC motor rotors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910610990.3A CN110224516A (en) | 2019-07-08 | 2019-07-08 | A kind of two extremely embedded brushless DC motor rotors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110224516A true CN110224516A (en) | 2019-09-10 |
Family
ID=67812872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910610990.3A Pending CN110224516A (en) | 2019-07-08 | 2019-07-08 | A kind of two extremely embedded brushless DC motor rotors |
Country Status (1)
| Country | Link |
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| CN (1) | CN110224516A (en) |
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