CN105529852A - Built-in permanent magnet motor rotor structure and motor with same - Google Patents
Built-in permanent magnet motor rotor structure and motor with same Download PDFInfo
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- CN105529852A CN105529852A CN201610099079.7A CN201610099079A CN105529852A CN 105529852 A CN105529852 A CN 105529852A CN 201610099079 A CN201610099079 A CN 201610099079A CN 105529852 A CN105529852 A CN 105529852A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 40
- 238000000034 method Methods 0.000 claims description 15
- 238000004080 punching Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 11
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 3
- 210000003781 tooth socket Anatomy 0.000 abstract 2
- 230000010349 pulsation Effects 0.000 description 15
- 230000000694 effects Effects 0.000 description 8
- 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
- 230000008859 change Effects 0.000 description 4
- 239000012634 fragment Substances 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- 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 Magnet Type Synchronous Machine (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a built-in permanent magnet motor rotor structure, which comprises a rotor plate (1) and a plurality of magnetic slots (2), wherein the plurality of magnetic slots (2) are arranged in the rotor plate (1) for placing magnetic bodies (3); two polar arc angles of magnetic poles under a pair of poles of the rotor structure are defined as a first polar arc angle alpha and a second polar arc angle theta; the first polar arc angle alpha is divided into alpha1 and alpha2 by a center line of the magnetic pole; the second polar arc angle alpha is divided into theta1 and theta2 by the center line of the magnetic pole; under the pair of poles, at least one pole meets the formula: theta1 is not equal to theta2 or alpha1 is not equal to alpha2; and one pair of poles is the poles formed by the magnetic bodies in two adjacent magnetic slots. Through the built-in permanent magnet motor rotor structure, applied moments of the magnetic poles and stator tooth sockets are partially offset; the tooth socket torques and torque ripples are effectively reduced; meanwhile, the running stability and reliability of an original motor can also be maintained or improved; and the efficiency of the motor is not reduced. The invention further relates to a motor with the rotor structure.
Description
Technical field
The invention belongs to magneto technical field, be specifically related to a kind of built-in rotor structure of permanent-magnet motor and there is its motor.
Background technology
In prior art 1, patent CN1278472C is by having V-type groove and trimming groove at rotor outer circle, and trimming groove is asymmetric, its rotor is made up of the iron core of the axial mutual dislocation of multistage, 180 °, the torque phase place that cogging torque and winding are produced reduces torque pulsation, but because each iron leg heart cylindrical notching construction is different, motor process is complicated, is not easy to volume production, and the decline of motor performance may be brought thus, motor cost increases.
2, granted patent CN102684337B and CN102624116B provides a kind of rotor segmental structure, and adjacent two-stage rotor iron core magnetic poles angle is 360 °/[N*LCM (Z1,2P)], N is rotor segment number, Z1 is number of stator slots, and P is motor number of pole-pairs, LCM (Z1,2P) be Z1 and P least common multiple, can leakage field be reduced, weaken slot effect, equally its each iron leg heart and dividing plate bolt hole position different, may need to drop into mould, production cost increases more.
3, granted patent CN101796706B is that Multi-section eccentric circular arc is formed by arranging rotor outer circle, and optimizes pole shoe and magnet width ratio, finally by segmentation, reaches less torque pulsation, increases the object of air gap flux density sine degree.
Above patent rotor structure all uses segmental structure, realize the object reducing cogging torque and torque pulsation, but it also results in the decline of the performances such as motor operation stability and reliability while reducing cogging torque and torque pulsation, the defects such as cost increase, therefore research and design of the present invention goes out a kind of built-in rotor structure of permanent-magnet motor and has its motor.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that overcoming magneto of the prior art existence cannot realize effectively reducing cogging torque and torque pulsation, the defect maintaining original motor performance, operating efficiency can also be made again, thus a kind of built-in rotor structure of permanent-magnet motor is provided and there is its motor.
The invention provides a kind of built-in rotor structure of permanent-magnet motor, they multiple magnetic grooves for placing magnet comprising rotor punching and be arranged at described rotor punching inside, a pair extremely lower two the magnetic pole polar arc angle defining described rotor structure are 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 at its place, second polar arc angle θ is divided into θ 1 and θ 2 by the pole center line at its place, and a pair extremely under, have at least one extremely satisfied: θ 1 ≠ θ 2 or α 1 ≠ α 2, wherein a pair pole be magnet in adjacent two magnetic grooves formed to pole.
Preferably, a pair extremely under, wherein said first polar arc angle [alpha] meets: 0.8 τ < α < τ, and wherein τ is pole span, and τ=180 °/p, p are motor number of pole-pairs.
Preferably, a pair extremely under, described second polar arc angle θ meet: τ < θ <1.2 τ.
Preferably, in each described magnetic groove, be provided with the outer process that the inner process that protrudes to the axis of magnet steel groove bearing of trend many places and many places are protruded to rotor outer circle direction.
Preferably, be the pole center line circumference both sides of α and position between the magnetic groove and the radial direction of rotor structure circumferential edge of this magnetic pole offers rectangular opening in polar arc angle.
Preferably, two adjacent described rectangular openings and the angle that formed between the line between described rotor center be β, and to meet: β=2*360 °/Z, wherein Z is the number of stator slots of motor.
Preferably, the width defining described rectangular opening is M, and length is L, and has 0.6k≤M≤1.5k, and wherein k is the stator tooth width of motor stator; And M≤L≤2M; Be greater than 1 times of width of air gap to the distance of rotor core outer surface outside rectangular opening, be less than 2 times of width of air gaps, wherein width of air gap is the width of rotor outer surface to stator inner surface.
Preferably, described rotor structure is the segmental structure along its axis direction more than 2 sections, and among adjacent two sections one section is for just to put iron core, the be inverted iron core of another section for being formed rotating a pole span angle τ with rotating shaft again after the identical iron core of iron core setting position overturns 180 ° along the direction of cutting axis with above-mentioned just putting.
Preferably, described Zheng Zhi iron mandrel equals to be inverted iron mandrel to total height to total height.
Preferably, between adjacent rotor section, be provided with non-magnetic dividing plate, and described dividing plate is identical with the external diameter of described rotor punching.
The present invention also provides a kind of motor, comprises stator and rotor, and wherein this rotor is aforesaid any one rotor structure.
Preferably, motor is a point yardage roll interior permanent magnet machines.
A kind of built-in rotor structure of permanent-magnet motor provided by the invention and the motor with it have following beneficial effect:
1. magnetic pole and stator teeth groove opplied moment part effectively can be made to offset, effectively reduce cogging torque and torque pulsation, can also maintain or promote original motor operation stability and reliability again simultaneously; And electric efficiency does not reduce;
2. the technical scheme of rotor structure of the present invention only has a kind of structure punching, and structure is relatively simple, and technique is easy to realize, low cost of manufacture;
3. by polar arc angle being the pole center line circumference of α and both sides, position between the magnetic groove and the radial direction of rotor structure circumferential edge of this magnetic pole have the mode of rectangular opening, effectively can change magnetic line of force trend, further reduction cogging torque, reduces harmonic wave;
4. the present invention adopts same rotor punching to realize the function of rotor segment dislocation, reducing motor torque ripple and unbalanced electromagnetic force further, can effectively reduce leakage field and eddy current loss by arranging non-magnetic dividing plate between segmented rotor section;
5. a kind of built-in rotor structure of permanent-magnet motor provided by the invention, can effectively weaken motor cogging torque and torque pulsation, reduces motor oscillating noise, is convenient to realize accurate control, lifting motor operation stability and reliability; Technique is easy to realize, low cost of manufacture.
Accompanying drawing explanation
Fig. 1 is 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 (wherein dotted line 9 represents and just puts iron core, and solid line 10 represents the iron core that is inverted) of the rotor core of Fig. 2;
Fig. 4 is the Facad structure schematic diagram of dividing plate of the present invention;
Fig. 5 is that original technical scheme and the technical program examples of implementation torque versus scheme;
Fig. 6 is original technical scheme and the technical program examples of implementation cogging torque curve comparison figure.
In figure, Reference numeral is expressed as:
1-(silicon steel sheet) rotor punching, 2-magnetic groove, 3-magnet, 4-inner process, 5-outer process, 6-rivet hole, 7-rotor shaft hatch, 8-rectangular opening, 9-just put iron core, 10-be inverted iron core, 11-dividing plate, 12-rivet.
Embodiment
As Figure 1-3, the invention provides a kind of built-in rotor structure of permanent-magnet motor, comprise rotor punching 1 (being preferably silicon steel material) and be arranged at the multiple magnetic grooves 2 for placing magnet 3 (preferably magnet steel) of described rotor punching 1 inside, and and rotating shaft coordinate axis hole 7 pole rivet hole 6, its rotor extremely descends N a pair, S pole configuration is different, a pair extremely lower two the magnetic pole polar arc angle defining described rotor structure are respectively the first polar arc angle [alpha] and the second polar arc angle θ, by asymmetricly polar arc angle can be changed every bore arranging near rotor outer circle magnet steel groove end, first polar arc angle [alpha] by the pole center line d axle at its place be divided into α 1 and α 2 (same extremely under α 1 and α 2 meet: α 1+ α 2=α), second polar arc angle θ by the pole center line d axle at its place be divided into θ 1 and θ 2 (same extremely under θ 1 and θ 2 meet: θ 1+ θ 2=θ), polar arc angle is α, magnetic pole alternately configuration at interval, rotor circumference direction of θ, further, a pair extremely under, have at least one extremely satisfied: θ 1 ≠ θ 2 or α 1 ≠ α 2.
By above set-up mode, make same magnetic field, left and right of extremely descending become asymmetrical relationship relative to theoretical pole center d axle, can effectively make magnetic pole and stator teeth groove opplied moment part offset, effectively weaken motor cogging torque.Can also maintain or promote original motor operation stability and reliability again simultaneously; And electric efficiency does not reduce.Technical scheme of the present invention only has a kind of structure punching, and structure is relatively simple, and technique is easy to realize, low cost of manufacture.
Further preferably, a pair extremely lower every pole all meets θ 1 ≠ θ 2, α 1 ≠ α 2; Make same magnetic field, left and right of extremely descending become asymmetrical relationship relative to theoretical pole center d axle further, more preferably can effectively make magnetic pole and stator teeth groove opplied moment part offset, effectively weaken motor cogging torque.Maintain simultaneously or promote original motor operation stability and reliability; And the effect that electric efficiency does not reduce.
Preferably, a pair extremely under, wherein said first polar arc angle [alpha] meets: 0.8 τ < α < τ, and wherein τ is pole span, namely 180 °/p, p are motor number of pole-pairs; By the polar arc angle [alpha] of a wherein magnetic pole is set between pole span angle τ and times of pole span angle τ of 0.8 times, this be a kind of preferred polar arc angle [alpha] scope is set, polar arc angle [alpha] and pole span angle τ effectively can be made to be formed and to contact.
Preferably, a pair extremely under, described second polar arc angle θ meets: τ < θ <1.2 τ, by the polar arc angle θ of a wherein magnetic pole is set between pole span angle τ and the 1.2 times of pole span angle τ of 1 times, this be a kind of preferred polar arc angle θ scope is set, can effectively make polar arc angle θ and pole span angle τ be formed to contact, and make polar arc angle [alpha] be less than polar arc angle θ, polar arc angle θ be less than polar arc angle [alpha] be also a kind of preferred polar arc angle θ scope is set, polar arc angle θ and polar arc angle [alpha] are formed contact.
More than arrange, make the extremely respective cogging torque that produces relative to the effect of stator teeth groove of N pole and S and torque pulsation phase place inconsistent, each distance between two poles and stator teeth groove relative position inconsistent, effectively weaken motor slot ripples, weaken motor cogging torque and torque pulsation.
Preferably, the outer process 5 inner process 4 that protrudes to the axis of magnet steel groove bearing of trend many places and many places protruded to rotor outer circle direction is provided with at each described magnetic groove 2 inwall.The inner process 4 protruded to the axis of magnet steel groove bearing of trend by arranging many places at magnetic groove inwall can play and carry out spacing effect to magnet, prevents magnetite from moving vibration; The outer process 5 protruded to rotor outer circle direction many places is set and effectively plays effect every magnetic, reduce this place's leakage field.
Preferably, be the pole center line circumference both sides of α and position between the magnetic groove and the radial direction of rotor structure circumferential edge of this magnetic pole offers rectangular opening 8 in polar arc angle, by arranging the mode of rectangular opening in above-mentioned position, effectively can change the trend of the magnetic line of force, play the effect reducing cogging torque, reduce harmonic wave further.The angle formed between line (center line) between two adjacent described rectangular openings 8 and described rotor center is β, and meet: β=2*360 °/Z, wherein Z is number of stator slots, the set-up mode of concrete angle like this can make a rectangular opening aim at stator tooth center effectively, and another rectangular opening also aims at stator tooth center.
Preferably, the width defining described rectangular opening 8 is M, and length is L, and have 0.6k≤M≤1.5k, wherein k is the stator tooth width of motor stator, and this is the preferred span of rectangular opening width, can effectively ensure aiming between rectangular opening and the center of stator tooth; And M≤L≤2M, this is the preferred span of rectangular opening length, and namely length is between the width of the width to 2 times of 1 times; And be greater than 1 times of width of air gap to the distance of rotor core exterior surface outside rectangular opening, be less than 2 times of width of air gaps (limiting rectangular opening in epitrochanterian radial position), wherein width of air gap is the width of rotor outer surface to stator inner surface.
More than arrange the trend that effectively can change the magnetic line of force, reduce tooth center air gap flux density too high, air gap flux density is more sinusoidal, plays the effect reducing cogging torque, reduce harmonic wave further.
Preferably, described rotor structure is the segmental structure along its axis direction more than 2 sections, and (namely number of fragments N be more than or equal to 2 or rotor be at least divided into 2 sections); And among adjacent two sections one section is for just to put iron core 9, the be inverted iron core 10 of another section for being formed rotating a pole span angle τ with rotating shaft again after the identical iron core of iron core setting position overturns 180 ° along the direction of cutting axis with above-mentioned just putting; After upset, it is positioned at the N pole that the position, S pole of just putting iron core becomes the iron core that is inverted originally.
Preferably, no matter number of fragments N is how many, and described Zheng Zhi iron mandrel equals to be inverted stalk to total height to total height.
Arranged by above-mentioned segmental structure, the function of rotor segment dislocation can be realized, further reduction motor cogging torque and torque pulsation, equal to be inverted stalk to total height to total height by Zheng Zhi iron mandrel simultaneously, effectively can also weaken the asymmetric asymmetric electromagnetic force caused of magnetic pole, reduce motor oscillating noise, final improving running reliability of motor.
Preferably, be provided with non-magnetic dividing plate 11 (being preferably way-board) between adjacent rotor section, and described dividing plate 11 is identical with the external diameter of described rotor core 1, has identical rivet hole and external diameter, as shown in Figure 4.By arranging non-magnetic way-board between rotor section, can effectively reduce leakage field and eddy current loss.
The present invention also provides a kind of motor, comprises stator and rotor, and wherein this rotor is aforesaid rotor structure.By rotor being selected and being set to the mode of aforesaid rotor structure, the same left and right magnetite that extremely descends is made to become asymmetrical relationship relative to theoretical pole center d axle, can realize that magnetite is asymmetric and magnetic pole is asymmetric, magnetic pole and stator teeth groove opplied moment part can be effectively made to offset, effective weakening motor cogging torque and torque pulsation, can also maintain or promote original motor operation stability and reliability again simultaneously; And electric efficiency does not reduce.Technical scheme of the present invention only has a kind of structure punching, and structure is relatively simple, and technique is easy to realize, low cost of manufacture.
Preferably, motor is a point yardage roll interior permanent magnet machines, and this is the preferred kind of one and the version of motor, and a point yardage roll interior permanent magnet machines is term, and this technical scheme is applicable to such motor.Motor slot number is coordinated and is not limited to 36 groove 6 poles.
Introduce the preferred embodiments of the present invention below
As Figure 1-4, the invention provides a kind of internal permanent magnet synchronous motor rotor structure, can effectively reduce motor cogging torque and torque pulsation little, reduce vibration noise, be easy to realize high accuracy and control, improving running reliability of motor.
Be just that examples of implementation are to set forth embodiment in conjunction with 36 groove 6 pole motors below, Fig. 1 is this technical scheme rotor punching structure figure, rotor punching 1 has the magnetic groove 2 placing magnet 3 (being preferably magnet steel), and and rotating shaft coordinate axis hole 7 and rivet hole 6, magnetic groove 2 end is provided with every bore and projection 4 and 5, spacing and every magnetic for magnet; Rotor extremely descends for a pair N, S pole configuration different, define a pair extremely lower two magnetic pole polar arc angle and be respectively α and θ, polar arc angle [alpha] is divided into α 1 and α 2 by pole center line d axle, polar arc angle θ is divided into θ 1 and θ 2 by pole center line d axle, have rectangular opening in the pole center both sides that polar arc angle is α simultaneously, angle between rectangular opening center line is β, and rectangular opening width is M, and length is L; Polar arc angle is magnetic pole alternately configuration at interval, rotor circumference direction of α, θ;
According to this technical scheme, a pair extremely under, wherein the polar arc angle [alpha] of a magnetic pole meets: 0.8 τ < α < τ, and wherein τ is pole span, namely 180 °/p, p are motor number of pole-pairs; 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, and namely polar arc angle [alpha] is less than polar arc angle θ; Same extremely under θ 1 and θ 2 meet: θ 1+ θ 2=θ;
A pair extremely under, have at least one extremely satisfied: θ 1 ≠ θ 2 or α 1 ≠ α 2, or all meet θ 1 ≠ θ 2, α 1 ≠ α 2; Namely the same left and right magnetite that extremely descends becomes asymmetrical relationship relative to theoretical pole center d axle;
More than arrange, can realize that magnetite is asymmetric and magnetic pole is asymmetric, magnetic pole and stator teeth groove opplied moment part can be made to offset, effectively weaken motor cogging torque and torque pulsation;
According to this technical scheme, polar arc angle is that the pole center both sides of α have rectangular opening, and the angle between rectangular opening center line is that β meets: β=2*360 °/Z, wherein Z is number of stator slots, namely, when a rectangular opening aims at stator tooth center, another rectangular opening also aims at stator tooth center; Rectangular opening width M, length L meet: 0.6k≤M≤1.5k, k is stator tooth width; M≤L≤2M; Width of air gap is equaled to the distance of rotor core outer surface outside rectangular opening;
Above-mentioned rectangular opening is arranged, and can change magnetic line of force trend, reduce cogging torque further, reduce harmonic wave.
According to this technical scheme, rotor adopts segmental structure, and number of fragments N is more than or equal to 2, and namely rotor is at least divided into 2 sections; One section for just to put iron core, another section is the iron core that is inverted, and the iron core that is inverted refers to rotate a pole span angle with rotating shaft again after just putting upset 180 ° unshakable in one's determination; Just put S pole unshakable in one's determination after upset and become the N pole unshakable in one's determination that is inverted; No matter number of fragments N is how many, is just putting total height unshakable in one's determination and is equaling the total height unshakable in one's determination that is inverted; Between rotor section and two ends of rotor be all placed with non-magnetic way-board, dividing plate with iron core have identical rivet hole and external diameter, Fig. 4;
Above-mentioned subsection setup, can realize the function of rotor segment dislocation, reduces motor cogging torque and torque pulsation further, effectively can also weaken the asymmetric asymmetric electromagnetic force caused of magnetic pole, final improving running reliability of motor simultaneously; Be placed with non-magnetic way-board between rotor section, can effectively reduce leakage field and eddy current loss;
The original technical scheme of Fig. 5 and the technical program examples of implementation torque versus scheme, and magnet consumption is constant, and after adopting this technical scheme, motor is exerted oneself and do not declined, and torque pulsation have dropped 57%, successful;
The original technical scheme of Fig. 6 and the technical program examples of implementation cogging torque curve comparison, after adopting this technical scheme, cogging torque have dropped 68%, and effect is more obvious.
Those skilled in the art will readily understand, under the prerequisite of not conflicting, above-mentioned each advantageous manner freely can combine, superpose.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (12)
1. a built-in rotor structure of permanent-magnet motor, it is characterized in that: comprise rotor punching (1) and be arranged at the inner multiple magnetic grooves (2) for placing magnet (3) of described rotor punching (1), a pair extremely lower two the magnetic pole polar arc angle defining described rotor structure are 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 at its place, second polar arc angle θ is divided into θ 1 and θ 2 by the pole center line at its place, and a pair extremely under, have at least one extremely satisfied: θ 1 ≠ θ 2 or α 1 ≠ α 2, wherein a pair pole be magnet in adjacent two magnetic grooves formed to pole.
2. rotor structure according to claim 1, is characterized in that: a pair extremely under, wherein said first polar arc angle [alpha] meets: 0.8 τ < α < τ, and wherein τ is pole span, and τ=180 °/p, p are motor number of pole-pairs.
3. rotor structure according to claim 2, is characterized in that: a pair extremely under, described second polar arc angle θ meet: τ < θ <1.2 τ.
4. according to the rotor structure one of claim 1-3 Suo Shu, it is characterized in that: be provided with the outer process (5) inner process (4) that protrudes to the axis of magnet steel groove bearing of trend many places and many places protruded to rotor outer circle direction at each described magnetic groove (2) inwall.
5. according to the rotor structure one of claim 1-4 Suo Shu, it is characterized in that: in the pole center line circumference both sides of described first polar arc angle [alpha] and position between the magnetic groove and the radial direction of rotor structure circumferential edge of this magnetic pole offers rectangular opening (8).
6. rotor structure according to claim 5, it is characterized in that: two adjacent described rectangular openings (8) and the angle that formed between the line between described rotor center be β, and meet: β=2*360 °/Z, wherein Z is the number of stator slots of motor.
7. according to the rotor structure one of claim 5-6 Suo Shu, it is characterized in that: the width defining described rectangular opening (8) is M, and length is L, and has 0.6k≤M≤1.5k, wherein k is the stator tooth width of motor stator; And M≤L≤2M; Be greater than 1 times of width of air gap to the distance of rotor core outer surface outside rectangular opening, be less than 2 times of width of air gaps, wherein width of air gap is the width of rotor outer surface to stator inner surface.
8. according to the rotor structure one of claim 1-7 Suo Shu, it is characterized in that: described rotor structure is the segmental structure along its axis direction more than 2 sections, and among adjacent two sections one section is for just to put iron core (9), the be inverted iron core (10) of another section for being formed rotating a pole span angle τ with rotating shaft again after the identical iron core of iron core setting position overturns 180 ° along the direction of cutting axis with above-mentioned just putting.
9. rotor structure according to claim 8, is characterized in that: described Zheng Zhi iron mandrel equals to be inverted iron mandrel to total height to total height.
10. one of-9 described rotor structures according to Claim 8, it is characterized in that: be provided with non-magnetic dividing plate (11) between adjacent rotor section, and described dividing plate (11) are identical with the external diameter of described rotor punching (1).
11. 1 kinds of motors, comprise stator and rotor, it is characterized in that, this rotor is the rotor structure described in one of claim 1-10.
12., according to motor described in claim 11, is characterized in that, motor is a point yardage roll interior permanent magnet machines.
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| 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 |
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| 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 |
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| CN105529852A true CN105529852A (en) | 2016-04-27 |
| CN105529852B CN105529852B (en) | 2018-09-25 |
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| CN108233571A (en) * | 2016-12-15 | 2018-06-29 | 福特全球技术公司 | Rotor |
| 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 |
| CN110277845A (en) * | 2018-03-15 | 2019-09-24 | 本田技研工业株式会社 | The rotor of rotating electric machine |
| CN111030339A (en) * | 2019-12-16 | 2020-04-17 | 珠海格力电器股份有限公司 | Electric motor rotor and alternating-pole electric motor |
| CN111226383A (en) * | 2017-09-18 | 2020-06-02 | Ifp新能源公司 | Geometry of magnetic bridges of an electric machine rotor |
| CN111245125A (en) * | 2020-01-19 | 2020-06-05 | 山东大学 | Rotor magnetic pole segmented permanent magnet synchronous motor and electromagnetic vibration weakening method thereof |
| 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 |
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| CN113629916A (en) * | 2021-08-05 | 2021-11-09 | 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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| CN106059223A (en) * | 2016-05-25 | 2016-10-26 | 东南大学 | Complementary type magnetic gear double-rotor motor |
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| CN111226383A (en) * | 2017-09-18 | 2020-06-02 | Ifp新能源公司 | Geometry of magnetic bridges of an electric machine rotor |
| CN111226383B (en) * | 2017-09-18 | 2022-10-11 | 马威动力控制技术(上海)有限公司 | 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 |
| CN110277845A (en) * | 2018-03-15 | 2019-09-24 | 本田技研工业株式会社 | The rotor of rotating electric machine |
| CN112534680A (en) * | 2018-06-07 | 2021-03-19 | 马威动力控制技术有限公司 | Rotor for an electrical machine and electrical machine comprising said rotor |
| CN111030339A (en) * | 2019-12-16 | 2020-04-17 | 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 |
| CN111245125A (en) * | 2020-01-19 | 2020-06-05 | 山东大学 | Rotor magnetic pole segmented permanent magnet synchronous motor and electromagnetic vibration weakening method thereof |
| 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 |
| CN113629916A (en) * | 2021-08-05 | 2021-11-09 | 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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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 |