CN105529852B - A kind of built-in rotor structure of permanent-magnet motor and the motor with it - Google Patents
A kind of built-in rotor structure of permanent-magnet motor and the motor with it Download PDFInfo
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- CN105529852B CN105529852B CN201610099079.7A CN201610099079A CN105529852B CN 105529852 B CN105529852 B CN 105529852B CN 201610099079 A CN201610099079 A CN 201610099079A CN 105529852 B CN105529852 B CN 105529852B
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- 238000004080 punching Methods 0.000 claims abstract description 15
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 44
- 238000005192 partition Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000010349 pulsation Effects 0.000 abstract description 14
- 210000003781 tooth socket Anatomy 0.000 abstract description 10
- 230000000694 effects Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 5
- 239000012634 fragment Substances 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 238000004804 winding 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]
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The present invention provides a kind of built-in rotor structure of permanent-magnet motor, it includes rotor punching (1) and the multiple magnetic slots (2) for placing magnet (3) for being set to the rotor punching (1) inside, the extremely lower two magnetic poles polar arc angle of a pair for defining the rotor structure is respectively the first polar arc angle [alpha] and the second polar arc angle, θ, first polar arc angle [alpha] is divided into α 1 and α 2 by the pole center line where it, second polar arc angle, θ is divided into θ 1 and θ 2 by the pole center line where it, and it is a pair of extremely under, an at least pole meets：1 ≠ θ of θ 2 or 1 ≠ α of α 2, one pair of which pole are the magnet formation in adjacent two magnetic slot to pole.Effectively magnetic pole can be offseted through the invention with stator tooth socket opplied moment part, effectively reduce cogging torque and torque pulsation, while can also maintain or be promoted again original motor operation stability and reliability；And electric efficiency does not reduce.The invention further relates to the motors with the rotor structure.
Description
Technical field
The invention belongs to magneto technical fields, and in particular to a kind of built-in rotor structure of permanent-magnet motor and have it
Motor.
Background technology
In the prior art 1,1278472 C of patent CN are cut by being provided with V-type groove and trimming slot in rotor outer circle
Side slot is asymmetric, and rotor is made of the iron core of multistage axial direction mutual dislocation so that the torque phase that cogging torque is generated with winding
180 ° of position reduces torque pulsation, but since each iron leg heart outer circle notching construction is different, and motor process is complicated, the amount of being not easy to
Production, and the decline of motor performance thus may be brought, motor cost increases.
2,102684337 B of granted patent CN and 102624116 B of CN provide a kind of rotor segmental structure, phase
Adjacent two-stage rotor iron core magnetic poles angle is 360 °/[N*LCM (Z1,2P)], N is rotor segment number, and Z1 is number of stator slots, and P is electricity
Machine number of pole-pairs, LCM (Z1,2P) are Z1 and P least common multiples, it is possible to reduce leakage field weakens slot effect, its same each iron leg heart
And partition board bolt hole position is different, it may be necessary to put into mold, the production cost increases more.
3,101796706 B of granted patent CN are constituted by the way that rotor outer circle is arranged for Multi-section eccentric circular arc, and optimize pole
Boots and magnet width ratio reach smaller torque pulsation finally by segmentation, increase the purpose of air gap flux density sine degree.
Above patent rotor structure uses segmental structure, realizes the purpose for reducing cogging torque and torque pulsation, but
It also results in the decline of the performances such as motor operation stability and reliability reducing while cogging torque and torque pulsation, at
The defects of this increase, therefore research and design of the present invention goes out a kind of built-in rotor structure of permanent-magnet motor and the motor with it.
Invention content
Therefore, the technical problem to be solved in the present invention is that overcoming magneto in the prior art to exist cannot achieve both
Cogging torque and torque pulsation can be effectively reduced, and can also make the defect for maintaining original motor performance, working efficiency, from
And provide a kind of built-in rotor structure of permanent-magnet motor and the motor with it.
The present invention provides a kind of built-in rotor structure of permanent-magnet motor comprising rotor punching is rushed with the rotor is set to
Multiple magnetic slots for placing magnet inside piece define a pair of extremely lower two magnetic poles polar arc angle difference of the rotor structure
For the first polar arc angle [alpha] and the second polar arc angle, θ, the first polar arc angle [alpha] is divided into α 1 and α 2 by the pole center line where it, the
Two polar arc angle, θs are divided into θ 1 and θ 2 by the pole center line where it, and it is a pair of extremely under, an at least pole meets：θ1≠θ2
Or 1 ≠ α of α 2, one pair of which pole are the magnet formation in adjacent two magnetic slot to pole.
Preferably, it is a pair of extremely under, wherein the first polar arc angle [alpha] meets：0.8τ<α<τ, wherein τ be pole span, τ=
180 °/p, p is motor number of pole-pairs.
Preferably, it is a pair of extremely under, the second polar arc angle, θ meets：τ<θ<1.2τ.
Preferably, be equipped in each magnetic slot the inner process that protrude to the central axes of magnetic slot extending direction of many places with
The outer protrusion that many places are protruded to rotor outer circle direction.
Preferably, in the pole center line circumferential direction both sides that polar arc angle is α and positioned at the magnetic slot and rotor structure of the magnetic pole
Rectangular opening is offered at position between the radial direction of circumferential edge.
Preferably, it is formed by angle between the line between the rotor center of two adjacent rectangular openings
For β, and meet：β=2*360 °/Z, wherein Z is the number of stator slots of motor.
Preferably, the width for defining the rectangular opening is M, length L, and has 0.6k≤M≤1.5k, and wherein k is motor
The stator tooth width of stator；And M≤L≤2M；It is more than 1 times of width of air gap to the distance of rotor core outer surface outside rectangular opening,
Less than 2 times width of air gaps, wherein width of air gap are width of the rotor outer surface to stator inner surface.
Preferably, the rotor structure is the segmental structure along 2 sections of its axis direction or more, and among adjacent two sections
One section just to set iron core, another section is will turn over the above-mentioned identical iron core in iron core installation position of just setting along the direction of cutting shaft line
A pole span angle τ and formed invert iron core are rotated with shaft again after turning 180 °.
Preferably, it is described just setting iron core axial direction total height be equal to invert iron core axial direction total height.
Preferably, non-magnetic partition board, and the partition board and the rotor punching are provided between adjacent rotor section
Outer diameter is identical.
The present invention also provides a kind of motors, including stator and rotor, and the wherein rotor is rotor structure any one of above-mentioned.
Preferably, motor is distribution volume interior permanent magnet machines.
It a kind of built-in rotor structure of permanent-magnet motor provided by the invention and is had the advantages that with its motor：
1. effectively magnetic pole can be made to be offseted with stator tooth socket opplied moment part, cogging torque and torque arteries and veins are effectively reduced
It is dynamic, while can also maintain or be promoted again original motor operation stability and reliability；And electric efficiency does not reduce；
2. the technical solution of the rotor structure of the present invention only has a kind of structure punching, structure is relatively easy, and technique is easy to real
Existing, manufacturing cost is low；
3. by circumferential in the circumferential and magnetic slot positioned at the magnetic pole of the pole center line that polar arc angle is α and rotor structure
Both sides are provided with the mode of rectangular opening at position between the radial direction at edge, can effectively change magnetic line of force trend, further drop
Low gullet torque reduces harmonic wave；
4. the present invention realizes the function of rotor segment dislocation using same rotor punching, motor torque ripple is further decreased
And unbalanced electromagnetic force, by being arranged between segmented rotor section, non-magnetic partition board can effectively reduce leakage field and vortex is damaged
Consumption；
5. a kind of built-in rotor structure of permanent-magnet motor provided by the invention can effectively weaken motor cogging torque and turn
Square is pulsed, and is reduced motor oscillating noise, is easy to implement and accurately controls, and motor operation stability and reliability are promoted；Technique is easy to
It realizes, manufacturing cost is low.
Description of the drawings
Fig. 1 is the motor rotor stamping sheet structure figure of the present invention；
Fig. 2 is rotor core explosive view of the present invention；
Fig. 3 is the left view of the rotor core of Fig. 2 (wherein iron core is just set in the expression of dotted line 9, and the expression of solid line 10 inverts iron core)；
Fig. 4 is the positive structure schematic of the partition board of the present invention；
Fig. 5 is that original technology scheme is schemed with the technical program examples of implementation torque versus；
Fig. 6 is original technology scheme and the technical program examples of implementation cogging torque curve comparison figure.
Reference numeral is expressed as in figure：
1-(silicon steel sheet) rotor punching, 2-magnetic slots, 3-magnets, 4-inner process, 5-outer protrusions, 6-rivet holes, 7-
Rotor shaft hatch, 8-rectangular openings, 9-just set iron core, and 10-invert iron core, 11-partition boards, 12-rivets.
Specific implementation mode
As shown in Figs. 1-3, the present invention provides a kind of built-in rotor structure of permanent-magnet motor, including rotor punching 1 is (preferably
Silicon steel material) and multiple magnetic slots 2 for placing magnet 3 (preferably magnet steel) for being set to inside the rotor punching 1, with
And the 7 pole rivet hole 6 of axis hole with shaft cooperation, wherein rotor a pair extremely descend N, S pole configuration different, define the rotor knot
The extremely lower two magnetic poles polar arc angle of a pair of structure is respectively the first polar arc angle [alpha] and the second polar arc angle, θ, by close to rotor
Polar arc angle can be changed every bore in outer circle magnetic slot end set asymmetry, and the first polar arc angle [alpha] is by the pole center where it
Line d axis be divided into α 1 and α 2 (it is same extremely under α 1 and α 2 meet：α 1+ α 2=α), the second polar arc angle, θ is by the magnetic pole where it
Heart line d axis be divided into θ 1 and θ 2 (it is same extremely under θ 1 and θ 2 meet：θ 1+ θ 2=θ), polar arc angle is that the magnetic pole of α, θ are justified in rotor
Circumferential direction alternates configuration；Also, it is a pair of extremely under, an at least pole meets：1 ≠ θ of θ 2 or 1 ≠ α of α 2.
Pass through above set-up mode so that same extremely lower or so magnetic field is relative to theoretical pole center d axis at asymmetry
Relationship effectively can make magnetic pole be offseted with stator tooth socket opplied moment part, effectively weaken motor cogging torque.Simultaneously again
It can also maintain or be promoted original motor operation stability and reliability；And electric efficiency does not reduce.The technical side of the present invention
Case only has a kind of structure punching, and structure is relatively easy, and technique is easily achieved, and manufacturing cost is low.
It is further preferred that a pair of extremely lower every pole all meets 1 ≠ θ of θ 2,1 ≠ α of α 2；It is further so that same extremely lower or so
Magnetic field, at asymmetrical relationship, more preferably effectively can make magnetic pole be acted on stator tooth socket relative to theoretical pole center d axis
Torque part offsets, and effectively weakens motor cogging torque.Maintain or promoted original motor operation stability and reliability simultaneously；
And the effect that electric efficiency does not reduce.
Preferably, it is a pair of extremely under, wherein the first polar arc angle [alpha] meets：0.8τ<α<τ, wherein τ are pole span, i.e.,
180 °/p, p is motor number of pole-pairs；By set the polar arc angle [alpha] of a wherein magnetic pole to 0.8 times pole span angle τ and one times
Between pole span angle τ, this is a kind of setting range of preferred polar arc angle [alpha], can be effectively so that polar arc angle [alpha] and pole span
Angle τ forms contact.
Preferably, it is a pair of extremely under, the second polar arc angle, θ meets：τ<θ<1.2 τ, by by the polar arc of a wherein magnetic pole
Angle, θ is set as between 1 times of pole span angle τ and 1.2 times of pole span angle τs, this is a kind of setting model of preferred polar arc angle, θ
It encloses, can effectively make polar arc angle, θ be contacted with the formation of pole span angle τ, and polar arc angle [alpha] is made to be less than polar arc angle, θ,
It is also a kind of setting range of preferred polar arc angle, θ that polar arc angle, θ, which is less than polar arc angle [alpha], so that polar arc angle, θ and polar arc angle
It spends α and forms contact.
Arrangement above so that the poles N extremely respectively act on the cogging torque generated and torque pulsation phase with S relative to stator tooth socket
Position is inconsistent, and each magnetic pole pitch and stator tooth socket relative position are inconsistent, effectively weakens motor slot ripples, weakens motor tooth socket and turns
Square and torque pulsation.
Preferably, it dashes forward into the central axes of magnetic slot extending direction protrusion equipped with many places in each 2 inner wall of magnetic slot
Play 4 and the outer protrusion 5 that is protruded to rotor outer circle direction of many places.By the way that many places are arranged to magnetic slot extending direction in magnetic slot inner wall
The inner process 4 of central axes protrusion can play the role of limiting magnet, prevent magnetite movement vibration；Be arranged many places to turn
The outer protrusion 5 of the outer circular direction protrusion of son effectively acts as the effect every magnetic, reduces leakage field at this.
Preferably, in the pole center line circumferential direction both sides that polar arc angle is α and positioned at the magnetic slot and rotor structure of the magnetic pole
Rectangular opening 8 is offered at position between the radial direction of circumferential edge, in such a way that in above-mentioned position, rectangular opening is set, Ke Yiyou
Effect ground changes the trend of the magnetic line of force, the effect for further functioning as and reducing cogging torque, reduce harmonic wave.Two adjacent rectangles
It is β that angle is formed by between line (center line) between hole 8 and the rotor center, and is met：β=2*360 °/Z,
Middle Z is number of stator slots, and the set-up mode of such specific angle can effectively make a rectangular opening alignment stator tooth center,
Another rectangular opening is also directed at stator tooth center.
Preferably, the width for defining the rectangular opening 8 is M, length L, and has 0.6k≤M≤1.5k, and wherein k is motor
The stator tooth width of stator, this is the preferred value range of rectangle hole width, can effectively ensure rectangular opening and stator tooth
Alignment between center；And M≤L≤2M, this is the preferred value range of rectangle hole length, i.e., length in 1 times of width to 2 times
Width between；And it is more than 1 times of width of air gap to the distance of rotor core exterior surface outside rectangular opening, it is less than 2 times of width of air gaps
(limiting radial position of the rectangular opening on rotor), wherein width of air gap is width of the rotor outer surface to stator inner surface.
Arrangement above can effectively change the trend of the magnetic line of force, and air gap flux density is excessively high at reduction tooth center, air gap flux density
Effect that is more sinusoidal, further functioning as and reduce cogging torque, reduce harmonic wave.
Preferably, the rotor structure is the segmental structure along 2 sections of its axis direction or more, (i.e. number of fragments N more than etc.
At least it is divided into 2 sections in 2 or rotor)；And one section among adjacent two sections is just to set iron core 9, another section for by with it is above-mentioned just
Set the identical iron core in iron core installation position along cutting shaft line direction overturn 180 ° after again with shaft rotate a pole span angle τ and
What is formed inverts iron core 10；Its script becomes inverting the poles N of iron core positioned at the poles the S position for just setting iron core after overturning.
Preferably, no matter number of fragments N is how many, and the iron core axial direction total height of just setting is equal to that invert iron core axial total high
Degree.
It is arranged by above-mentioned segmental structure, the function of rotor segment dislocation may be implemented, further decrease motor tooth socket
Torque and torque pulsation, while by just setting iron core axial direction total height equal to iron core axial direction total height is inverted, can also effectively cut
Asymmetric electromagnetic force caused by weak magnetic extremely asymmetry, reduces motor oscillating noise, final improving running reliability of motor.
Preferably, non-magnetic partition board 11 (preferably way-board), and the partition board are provided between adjacent rotor section
11 is identical as the outer diameter of the rotor core 1, has identical rivet hole and outer diameter, as shown in Figure 4.By being set between rotor section
Non-magnetic way-board is set, leakage field and eddy-current loss can be effectively reduced.
The present invention also provides a kind of motors, including stator and rotor, and the wherein rotor is rotor structure above-mentioned.Passing through will
Rotor selects and is set as the mode of rotor structure above-mentioned so that same extremely lower or so magnetite is relative to theoretical pole center d
Axis may be implemented magnetite asymmetry and magnetic pole be asymmetric at asymmetrical relationship, can be effectively so that magnetic pole is made with stator tooth socket
It is offseted with torque part, effectively weakens motor cogging torque and torque pulsation, while can also maintain or be promoted again original motor
Operation stability and reliability；And electric efficiency does not reduce.Technical scheme of the present invention only has a kind of structure punching, structure phase
To simple, technique is easily achieved, and manufacturing cost is low.
Preferably, motor is distribution volume interior permanent magnet machines, this is a kind of preferred type and structure type of motor,
Distribution volume interior permanent magnet machines are terms, which is suitable for such motor.The cooperation of motor slot number is not limited to 36 slots 6
Pole.
The preferred embodiment of the present invention is described below
As shown in Figs 1-4, the present invention provides a kind of internal permanent magnet synchronous motor rotor structure, can effectively reduce motor
Cogging torque and torque pulsation are small, reduce vibration noise, it is easy to accomplish high-precision control, improving running reliability of motor.
Just specific implementation mode is illustrated for examples of implementation, Fig. 1 is the technical solution rotor in conjunction with 36 slot, 6 pole motor below
Lamination structure figure, rotor punching 1 are provided with the magnetic slot 2 for placing magnet 3 (preferably magnet steel), and with the axis hole 7 of shaft cooperation and
Rivet hole 6,2 end of magnetic slot are equipped with every bore and protrusion 4 and 5, are limited for magnet and every magnetic；Rotor a pair extremely descends N, S magnetic pole
Configure different, a pair of extremely lower two magnetic poles polar arc angle of definition is respectively α and θ, and polar arc angle [alpha] is by pole center line d axis point
For α 1 and α 2, polar arc angle, θ is divided into θ 1 and θ 2 by pole center line d axis, while being opened in the pole center both sides that polar arc angle is α
There is rectangular opening, the angle between rectangle centerline hole is β, and rectangle hole width is M, length L；Polar arc angle is the magnetic pole of α, θ
Configuration is alternated in rotor circumference direction；
According to the technical solution, it is a pair of extremely under, wherein the polar arc angle [alpha] of a magnetic pole meets：0.8τ<α<τ, wherein τ are pole
Away from i.e. 180 °/p, p are motor number of pole-pairs；It is same extremely under α 1 and α 2 meet：α 1+ α 2=α；
The polar arc angle, θ of another magnetic pole meets：τ<θ<1.2 τ, i.e. polar arc angle [alpha] are less than polar arc angle, θ；It is same extremely under θ
1 and θ 2 meets：θ 1+ θ 2=θ；
It is a pair of extremely under, an at least pole meets：1 ≠ θ of θ 2 either 1 ≠ α of α 2 or meet 1 ≠ θ of θ 2,1 ≠ α of α 2；It is i.e. same
One extremely lower or so magnetite is relative to theoretical pole center d axis at asymmetrical relationship；
Arrangement above, may be implemented magnetite asymmetry and magnetic pole is asymmetric, can make magnetic pole and stator tooth socket active force
Square part offsets, and effectively weakens motor cogging torque and torque pulsation；
According to the technical solution, polar arc angle is that the pole center both sides of α are provided with rectangular opening, between rectangle centerline hole
Angle meets for β：β=2*360 °/Z, wherein Z is number of stator slots, i.e., when a rectangular opening is directed at stator tooth center, another square
Shape hole is also directed at stator tooth center；Rectangle hole width M, length L meet：0.6k≤M≤1.5k, k are stator tooth width；M≤L≤
2M；It is equal to width of air gap to the distance of rotor core outer surface outside rectangular opening；
Above-mentioned rectangular opening setting, can be changed magnetic line of force trend, further decreases cogging torque, reduce harmonic wave.
According to the technical solution, rotor uses segmental structure, number of fragments N to be more than or equal to 2, i.e. rotor is at least divided into 2 sections；
One section just to set iron core, another section, to invert iron core, inverts iron core and refers to just to set after iron core overturns 180 ° and rotate one again with shaft
A pole span angle；The poles S of iron core are just being set after overturning becomes inverting the poles N of iron core；No matter number of fragments N is how many, just sets iron core
Total height, which is equal to, inverts iron core total height；Between rotor section and two ends of rotor is placed with non-magnetic way-board, partition board and iron core
There are identical rivet hole and outer diameter, Fig. 4；
Above-mentioned subsection setup may be implemented the function of rotor segment dislocation, further decrease motor cogging torque and torque
Pulsation, while can also effectively weaken asymmetric electromagnetic force, final improving running reliability of motor caused by magnetic pole asymmetry；Turn
It is placed with non-magnetic way-board between subsegment, leakage field and eddy-current loss can be effectively reduced；
Fig. 5 original technologies scheme is schemed with the technical program examples of implementation torque versus, and magnet dosage is constant, using the technology
After scheme, motor output does not decline, and torque pulsation has dropped 57%, with obvious effects；
Fig. 6 original technologies scheme and the technical program examples of implementation cogging torque curve comparison, after the technical solution,
Cogging torque has dropped 68%, and effect becomes apparent from.
Those skilled in the art will readily recognize that under the premise of not conflicting, above-mentioned each advantageous manner can be free
Ground combination, superposition.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.With
Only it is the preferred embodiment of the present invention described in upper, it is noted that for those skilled in the art, not
Under the premise of being detached from the technology of the present invention principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as this
The protection domain of invention.
Claims (10)
1. a kind of built-in rotor structure of permanent-magnet motor, it is characterised in that：Including rotor punching (1) and it is set to the rotor punching
The internal multiple magnetic slots (2) for placing magnet (3) of piece (1) define the extremely lower two magnetic pole pole of a pair of the rotor structure
Arc angle is respectively the first polar arc angle [alpha] and the second polar arc angle, θ, and the first polar arc angle [alpha] is by the pole center line where it point
For α 1 and α 2, the second polar arc angle, θ is divided into θ 1 and θ 2 by the pole center line where it, and it is a pair of extremely under, an at least pole
Meet：1 ≠ θ of θ 2 or 1 ≠ α of α 2, one pair of which pole are the magnet formation in adjacent two magnetic slot to pole；
It is a pair of extremely under, wherein the first polar arc angle [alpha] meets：0.8τ<α<τ, wherein τ are pole span, and τ=180 °/p, p is motor
Number of pole-pairs；It is a pair of extremely under, the second polar arc angle, θ meets：τ<θ<1.2τ.
2. rotor structure according to claim 1, it is characterised in that：Each magnetic slot (2) inner wall be equipped with many places to
The outer protrusion (5) that the inner process (4) of the central axes protrusion of magnetic slot extending direction and many places are protruded to rotor outer circle direction.
3. according to the rotor structure described in one of claim 1-2, it is characterised in that：In the magnetic pole of the first polar arc angle [alpha]
Square is offered at center line circumferential direction both sides and the position being located between the magnetic slot and the radial direction of rotor structure circumferential edge of the magnetic pole
Shape hole (8).
4. rotor structure according to claim 3, it is characterised in that：Two adjacent rectangular openings (8) with it is described
It is β that angle is formed by between line between rotor center, and is met：β=2*360 °/Z, wherein Z is the stator slot of motor
Number.
5. rotor structure according to claim 3, it is characterised in that：The width for defining the rectangular opening (8) is M, length
For L, and there is 0.6k≤M≤1.5k, wherein k is the stator tooth width of motor stator；And M≤L≤2M；Rotor is arrived outside rectangular opening
The distance of iron core outer surface is more than 1 times of width of air gap, is less than 2 times of width of air gaps, and wherein width of air gap is rotor outer surface to calmly
The width of sub- inner surface.
6. the rotor structure according to one of claim 1-2,4-5, it is characterised in that：The rotor structure is along its axis
The segmental structure in 2 sections of direction or more, and one section among adjacent two sections is just to set iron core (9), another section for by with it is above-mentioned
Just setting the identical iron core in iron core installation position along cutting shaft line direction overturn 180 ° after again with shaft rotate a pole span angle τ
And what is formed inverts iron core (10).
7. rotor structure according to claim 6, it is characterised in that：It is described just setting iron core axial direction total height be equal to invert iron
Mandrel is to total height.
8. rotor structure according to claim 6, it is characterised in that：Be provided between adjacent rotor section it is non-magnetic every
Plate (11), and the partition board (11) is identical as the outer diameter of the rotor punching (1).
9. a kind of motor, including stator and rotor, which is characterized in that the rotor is the rotor knot described in one of claim 1-8
Structure.
10. motor according to claim 9, which is characterized in that motor is distribution volume interior permanent magnet machines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610099079.7A CN105529852B (en) | 2016-02-23 | 2016-02-23 | A kind of built-in rotor structure of permanent-magnet motor and the motor with it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610099079.7A CN105529852B (en) | 2016-02-23 | 2016-02-23 | A kind of built-in rotor structure of permanent-magnet motor and the motor with it |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105529852A CN105529852A (en) | 2016-04-27 |
| CN105529852B true CN105529852B (en) | 2018-09-25 |
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| CN106059223B (en) * | 2016-05-25 | 2018-06-15 | 东南大学 | A kind of complementary type magnetic gear double-rotor machine |
| US10707707B2 (en) * | 2016-12-15 | 2020-07-07 | Ford Global Technologies, Llc | Electric machine rotor |
| FR3071371B1 (en) * | 2017-09-18 | 2019-09-13 | IFP Energies Nouvelles | GEOMETRY OF MAGNETIC BRIDGES OF AN ELECTRIC MACHINE ROTOR |
| CN108023419A (en) * | 2017-12-06 | 2018-05-11 | 珠海格力电器股份有限公司 | Alternating-pole motor and compressor with same |
| CN109962589A (en) * | 2017-12-26 | 2019-07-02 | 宁波菲仕电机技术有限公司 | The axial segmentation of rotor structure for permanent magnet motor deflects assemble method |
| JP7059058B2 (en) * | 2018-03-15 | 2022-04-25 | 本田技研工業株式会社 | Rotating machine rotor |
| CN112470365A (en) * | 2018-06-07 | 2021-03-09 | 马威动力控制技术有限公司 | Rotor for an electric machine and electric machine comprising said rotor |
| CN111030339B (en) * | 2019-12-16 | 2022-01-28 | 珠海格力电器股份有限公司 | Electric motor rotor and alternating-pole electric motor |
| CN111353214A (en) * | 2020-01-10 | 2020-06-30 | 湘潭大学 | Optimization method combining three-section dislocation method of magnetic poles with V-shaped magnetic poles |
| CN111245125B (en) * | 2020-01-19 | 2022-04-15 | 山东大学 | Rotor magnetic pole segmented permanent magnet synchronous motor and electromagnetic vibration weakening method thereof |
| CN113629916B (en) * | 2021-08-05 | 2022-07-15 | 中山大洋电机股份有限公司 | Rotor structure and permanent magnet synchronous motor applying same |
| CN113890230A (en) * | 2021-10-29 | 2022-01-04 | 上海电机学院 | Asymmetric magnetic barrier rotor structure of built-in permanent magnet synchronous motor |
| CN114400804A (en) * | 2022-01-24 | 2022-04-26 | 中车永济电机有限公司 | Permanent magnet synchronous motor rotor structure with low torque fluctuation |
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| CN205385357U (en) * | 2016-02-23 | 2016-07-13 | 珠海格力节能环保制冷技术研究中心有限公司 | Built -in permanent -magnet machine rotor structure and have its motor |
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| CN203104152U (en) * | 2012-10-24 | 2013-07-31 | 广东美芝制冷设备有限公司 | Compressor and permanent magnet motor rotor device thereof |
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Effective date of registration: 20181008 Address after: 519070, Jinji Hill Road, front hill, Zhuhai, Guangdong Patentee after: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI Address before: 519000 science and technology building, 789 Jinji Road, Qianshan, Zhuhai, Guangdong Patentee before: GREE GREEN REFRIGERATION TECHNOLOGY CENTER Co.,Ltd. OF ZHUHAI |
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