CN108964312A - Rotor, motor - Google Patents
Rotor, motor Download PDFInfo
- Publication number
- CN108964312A CN108964312A CN201810930727.8A CN201810930727A CN108964312A CN 108964312 A CN108964312 A CN 108964312A CN 201810930727 A CN201810930727 A CN 201810930727A CN 108964312 A CN108964312 A CN 108964312A
- Authority
- CN
- China
- Prior art keywords
- pole
- magnet steel
- rotor
- monomer
- rotor core
- 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.)
- Pending
Links
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
- H02K1/278—Surface mounted magnets; Inset magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The present invention provides a kind of rotor, motor.A kind of rotor, including rotor core, at least provided with the first pole N magnet steel group on the rotor core, the first pole N magnet steel group includes the k pole N magnet steel monomer, wherein k be not less than positive integer, circumferentially-spaced laying of the pole the k N magnet steel monomer in the rotor core.Cogging torque caused by each pole N magnet steel group internal cogging can be reduced and even is eliminated by a kind of rotor according to the present invention, motor, so that the cogging torque and electromagnetic noise of motor be effectively reduced, improve motor performance.
Description
Technical field
The invention belongs to technical field of motor manufacture, and in particular to a kind of rotor, motor.
Background technique
In magneto, permanent magnet and grooved armature iron core interact, and inevitably generate cogging torque, cause to turn
Square fluctuation, causes vibration and noise, influences the control precision of system, cogging torque is peculiar one of the problem of magneto, is
The critical issue that must be taken into consideration and solve in high-performance permanent magnet design of electrical motor and manufacture.
Under normal conditions, the rotor of magneto is provided with multipair magnetic pole, each pole pair answer one piece of polarity be the pole S or
The magnet of the pole N can generate certain cogging torque when each piece of magnet turns over stator tooth socket, and resulting tooth socket turns
Square has periodically, and thus when motor operation generates electromagnetic noise, and keep motor output torque unstable, influences the property of motor
Energy.
Summary of the invention
It therefore, can be by each pole N magnetic the technical problem to be solved in the present invention is that providing a kind of rotor, motor
The reduction of cogging torque caused by steel group internal cogging even is eliminated, so that the cogging torque of motor is effectively reduced and electromagnetism is made an uproar
Sound improves motor performance.
To solve the above-mentioned problems, the present invention provides a kind of rotor, including rotor core, the rotor core up to
Less be equipped with the first pole N magnet steel group, the first pole N magnet steel group includes the k pole N magnet steel monomer, wherein k for not less than it is just whole
Number, circumferentially-spaced laying of the pole the k N magnet steel monomer in the rotor core.
Preferably, the k pole the N magnet steel monomers are equidistantly laid in the circumferential direction of the rotor core.
Preferably, the k pole the N magnet steel monomers are of same size in the circumferential direction of the rotor core.
Preferably, the pole the N magnet steel monomer, which has, is in the line of symmetry of the rotor core radially, the k N
Pole magnet steel monomer includes at least the first pole the N magnet steel monomer, the 2nd pole the N magnet steel monomer that are disposed adjacent, the pole kth N magnet steel monomer,
In the circumferential direction of the rotor core, the first pole N magnet steel monomer has first side, the second side being oppositely arranged, described
2nd pole N magnet steel monomer has the third side being oppositely arranged, four side, and the pole kth N magnet steel monomer, which has, to be oppositely arranged
Kth-side, kth side, the second side and the third side form angle γ, the first side and the kth
Side forms angle α, forms angle theta p between the line of symmetry that the pole the N magnet steel monomer of two of arbitrary neighborhood has, p is described
The number of pole-pairs of rotor,
Preferably, the rotor core also has plastic structure, and the plastic structure is covered in the first pole N magnet steel group
Peripheral side.
Preferably, also there is multiple through holes, axial direction of the through hole along the rotor core on the rotor core
Penetrate through the end face of the rotor core.
Preferably, the rotor further includes the first pole S magnet steel group, and the first pole S magnet steel group includes multiple poles S magnetic
The quantity of steel monomer, the pole the S magnet steel monomer is consistent with the quantity of the pole N magnet steel monomer included by the magnet steel group of the first pole N.
The present invention also provides a kind of motors, including above-mentioned rotor.
A kind of rotor provided by the invention, motor, due to by single magnetic pole (pole N or the pole S) in the prior art
It combines to be formed by the way of multiple magnet steel monomers, passes through the cloth to each pole N magnet steel monomer in the magnet steel group of the first pole N
Office and size, so as to reduce even cogging torque caused by each pole N magnet steel group or the pole S magnet steel group internal cogging
It eliminates, so that the cogging torque and electromagnetic noise of motor be effectively reduced, improves motor performance.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the rotor of the embodiment of the present invention；
Fig. 2 is the partial structurtes enlarged diagram in Fig. 1 at A.
Appended drawing reference indicates are as follows:
1, rotor core；2, the first pole N magnet steel group；21, the pole N magnet steel monomer；211, the first pole N magnet steel monomer；2111,
A side；2112, second side；212, the 2nd pole N magnet steel monomer；2121, third side；2122, four side；3, plastic knot
Structure；4, through hole；5, the first pole S magnet steel group.
Specific embodiment
In conjunction with referring to shown in Fig. 1, Fig. 2, according to an embodiment of the invention, providing a kind of rotor, including rotor core
1, at least provided with the first pole N magnet steel group 2 on the periphery wall of the rotor core 1, the first pole N magnet steel group 2 includes the k pole N
Magnet steel monomer 21, wherein k is the positive integer not less than 2, and the pole k N magnet steel monomer 21 is in the circumferential direction of the rotor core 1
Interval is laid, and as a same reason, the rotor further includes the first pole S magnet steel group 5, and the first pole S magnet steel group 5 includes multiple
The pole S magnet steel monomer, quantity and the pole the N magnet steel monomer 21 included by the first pole N magnet steel group 2 of the pole the S magnet steel monomer
Quantity is consistent.In the technical solution, since single magnetic pole (pole N or the pole S) in the prior art is used multiple magnet steel monomers
Mode combine to be formed, by the layout and size to each pole N magnet steel monomer 21 in the first pole N magnet steel group 2, thus
Cogging torque caused by each pole N magnet steel group or the pole S magnet steel group internal cogging can be reduced and even be eliminated, thus effectively
The cogging torque and electromagnetic noise of motor are reduced, motor performance is improved.
Best, the k pole the N magnet steel monomers 21 are equidistantly laid in the circumferential direction of the rotor core 1, further
Ground, the k pole the N magnet steel monomers 21 are of same size in 1 circumferential direction of rotor core, can so guarantee the k poles N
Magnet steel monomer 21 is laid out more uniform in the circumferential direction of the rotor core 1, and generated flux symmetrical is preferable.
In order to eliminate the cogging torque in each magnetic pole group between each magnet steel monomer, below with the first pole N magnet steel group 2
Specific structure be illustrated (dependency structure of the first pole S magnet steel group 5 is consistent with following steps, repeats no more).
Preferably, the pole the N magnet steel monomer 21, which has, is in the line of symmetry of the rotor core 1 radially, the k institute
It states the pole N magnet steel monomer 21 and includes at least the first pole N magnet steel monomer 211, the 2nd pole the N magnet steel monomer 212 being disposed adjacent, the pole kth N
Magnet steel monomer, in the circumferential direction of the rotor core 1, the first pole N magnet steel monomer 211 has the first side being oppositely arranged
2111, second side 2112, the 2nd pole N magnet steel monomer 212 have the third side 2121 being oppositely arranged, four side
2122, the kth N pole magnet steel monomer have the side 2k-1, the side 2k being oppositely arranged, the second side 2112 and institute
It states third side 2121 and forms angle γ, the first side 2111 and the side the 2k form angle α, and the two of arbitrary neighborhood
Angle theta p is formed between the line of symmetry that a pole N magnet steel monomer 21 has, p is the number of pole-pairs of the rotor, before being based on
Content is stated to be calculated as follows,
The cogging torque such as formula (1) of the pole kth N magnet steel monomer,
Then magnet steel group 2 total cogging torque in the first pole N is the sum of each 21 cogging torque of the pole N magnet steel monomer, such as formula
(2),
In formula (2): TnpkFor the cogging torque Fourier coefficient of the pole N magnet steel monomer；NpFor the cogging torque period of per tooth
Number, andZ is stator tooth socket slot number；
It can be seen from formula (2) as n/Np ≠ 1,2,3 ..., the n-th harmonic of cogging torque is if desired eliminated, then is needed
Suitable θ p is taken, sin nN is madepZ[α+(i-1)θp]=0, the first N that the such k pole the N magnet steel monomers 21 form
Pole magnet steel group 2 counteracts the n-th harmonic of itself, and all in all from motor, the n-th harmonic of cogging torque is 0；I.e.
It is obtained by formula (3):
M is while meeting the positive integer of the following conditions in formula (4)；
So as to obtain,It can be seen that working asWhen, the first pole N magnet steel group 2 can be complete
The n-th harmonic of itself is offset entirely, so that the n-th harmonic of the cogging torque of motor is eliminated, so that the electricity of motor be effectively reduced
Magnetic noise sound improves motor performance.
In order to guarantee the first pole N magnet steel group 2, each magnet steel monomer and the rotor core 1 in the first pole S magnet steel group 5
Combination reliability, and reduce the manufacturing difficulty of the rotor, it is preferable that the rotor core 1 also has plastic
Structure 3, the plastic structure 3 are covered in the peripheral side of the first pole N magnet steel group 2, are also covered in the first pole S magnetic certainly
The peripheral side of steel group 5, when processing, the plastic structure 3 is carried out by the way of pouring injection molding, has both facilitated plastic knot
The formation of structure 3, and will not make the first pole N magnet steel group 2, the first pole S magnet steel group 5 that high temperature demagnetization occur now because of temperature is excessively high
As.
Further, also there are multiple through holes 4, the through hole 4 is along the rotor core on the rotor core 1
1 end face axially through the rotor core 1, at this point, when carrying out plastic structure 3 described in pouring molding to the rotor
When, the covered material of flowing will penetrate into the through hole 4, and form end in the axial both ends of the surface of the rotor
Lid connects to make the first pole N magnet steel group 2, the 5 at least part of covering of the plastic structure 3 of the first pole S magnet steel group
It is relatively reliable.
It is understood that the first above-mentioned pole N magnet steel group 2, the first pole S magnet steel group 5 can be set in the rotor iron
On the periphery wall of core 1, multiple groups are set, what the first pole N magnet steel group 2 described in multiple groups, the first pole S magnet steel group 5 were spaced each other is evenly distributed with, shape
At magnet steel surface-mounted rotor structure, certainly, the first pole N magnet steel group 2, the first pole S magnet steel group 5 also be can be set at described turn
In the circumferential magnetic slot of sub- iron core 1, magnetic steel embedded rotor structure is formed.
According to an embodiment of the invention, a kind of motor is also provided, including above-mentioned rotor, due to using above-mentioned motor
Cogging torque caused by each pole N magnet steel group internal cogging can be reduced and even be eliminated, so that motor be effectively reduced by rotor
Cogging torque and electromagnetic noise, improve motor performance.
Those skilled in the art will readily recognize that above-mentioned each advantageous manner can be free under the premise of not conflicting
Ground combination, superposition.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.Above only
It is the preferred embodiment of the present invention, it is noted that for those skilled in the art, do not departing from this hair
Under the premise of bright technical principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as guarantor of the invention
Protect range.
Claims (8)
1. a kind of rotor, which is characterized in that including rotor core (1), the rotor core (1) is equipped with the first pole N magnetic
Steel group (2), the first pole the N magnet steel group (2) include the k pole N magnet steel monomer (21), and wherein k is the positive integer not less than 2, institute
The k pole N magnet steel monomer (21) is stated in the circumferentially-spaced laying of the rotor core (1).
2. rotor according to claim 1, which is characterized in that the k pole the N magnet steel monomers (21) are in the rotor
It is equidistantly laid in the circumferential direction of iron core (1).
3. rotor according to claim 2, which is characterized in that the k pole the N magnet steel monomers (21) are in the rotor
It is of same size in the circumferential direction of iron core (1).
4. rotor according to claim 3, which is characterized in that the pole the N magnet steel monomer (21) has in described
The line of symmetry of rotor core (1) radially, the k pole the N magnet steel monomers (21) include at least the first pole N being disposed adjacent
Magnet steel monomer (211), the 2nd pole N magnet steel monomer (212), the pole kth N magnet steel monomer, in the circumferential direction of the rotor core (1),
First pole the N magnet steel monomer (211) has first side (2111), second side (2112) being oppositely arranged, the 2nd N
Pole magnet steel monomer (212) has the third side (2121) being oppositely arranged, four side (2122), the pole kth N magnet steel monomer
With the side 2k-1, the side 2k being oppositely arranged, the second side (2112) and the third side (2121) are formed
Angle γ, the first side (2111) and the side the 2k form angle α, the pole the N magnet steel list of two of arbitrary neighborhood
Angle theta p is formed between the line of symmetry that body (21) has, p is the number of pole-pairs of the rotor,
5. rotor according to any one of claim 1 to 4, which is characterized in that the rotor core (1) also has
Plastic structure (3), the plastic structure are covered in the peripheral side of the first pole the N magnet steel group (2).
6. rotor according to claim 5, which is characterized in that also have multiple perforations on the rotor core (1)
Hole (4), the through hole (4) is along the end face axially through the rotor core (1) of the rotor core (1).
7. rotor according to claim 1, which is characterized in that further include the first pole S magnet steel group (5), the first S
Pole magnet steel group (5) includes the multiple pole S magnet steel monomers, the quantity of the pole the S magnet steel monomer and the first pole N magnet steel group (2) institute
Including the pole N magnet steel monomer (21) quantity it is consistent.
8. a kind of motor, including rotor, which is characterized in that the rotor is described in any one of claims 1 to 7
Rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810930727.8A CN108964312A (en) | 2018-08-15 | 2018-08-15 | Rotor, motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810930727.8A CN108964312A (en) | 2018-08-15 | 2018-08-15 | Rotor, motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108964312A true CN108964312A (en) | 2018-12-07 |
Family
ID=64470318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810930727.8A Pending CN108964312A (en) | 2018-08-15 | 2018-08-15 | Rotor, motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108964312A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002061918A2 (en) * | 2000-12-28 | 2002-08-08 | Hmd Sealless Pumps, Ltd. | Line start permanent magnet motor |
| CN1783650A (en) * | 2004-10-05 | 2006-06-07 | 阿尔斯通运输股份有限公司 | Rotor for an electric motor and electric motor including the same |
| CN202405896U (en) * | 2012-01-12 | 2012-08-29 | 信质电机股份有限公司 | Rotor core and high-efficiency variable-frequency speed regulation permanent magnet synchronous motor with same |
| CN204068469U (en) * | 2014-07-03 | 2014-12-31 | 扬州科光技术发展有限公司 | A kind of drift angle permanent magnet machine rotor |
| CN206226147U (en) * | 2016-09-27 | 2017-06-06 | 台州优松机电科技有限公司 | A kind of rotor for electromotor |
-
2018
- 2018-08-15 CN CN201810930727.8A patent/CN108964312A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002061918A2 (en) * | 2000-12-28 | 2002-08-08 | Hmd Sealless Pumps, Ltd. | Line start permanent magnet motor |
| CN1783650A (en) * | 2004-10-05 | 2006-06-07 | 阿尔斯通运输股份有限公司 | Rotor for an electric motor and electric motor including the same |
| CN202405896U (en) * | 2012-01-12 | 2012-08-29 | 信质电机股份有限公司 | Rotor core and high-efficiency variable-frequency speed regulation permanent magnet synchronous motor with same |
| CN204068469U (en) * | 2014-07-03 | 2014-12-31 | 扬州科光技术发展有限公司 | A kind of drift angle permanent magnet machine rotor |
| CN206226147U (en) * | 2016-09-27 | 2017-06-06 | 台州优松机电科技有限公司 | A kind of rotor for electromotor |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181207 |