CN110401282A - Rotor assembly and alternately pole motor - Google Patents
Rotor assembly and alternately pole motor Download PDFInfo
- Publication number
- CN110401282A CN110401282A CN201910713410.3A CN201910713410A CN110401282A CN 110401282 A CN110401282 A CN 110401282A CN 201910713410 A CN201910713410 A CN 201910713410A CN 110401282 A CN110401282 A CN 110401282A
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- Prior art keywords
- line
- pole
- rotor core
- rotor
- air groove
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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]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
- H02K21/021—Means for mechanical adjustment of the excitation flux
- H02K21/028—Means for mechanical adjustment of the excitation flux by modifying the magnetic circuit within the field or the armature, e.g. by using shunts, by adjusting the magnets position, by vectorial combination of field or armature sections
-
- 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 application provides a kind of rotor assembly and alternately pole motor.The rotor assembly includes rotor core, rotor core includes permanent-magnet pole and the alternating pole of circumferentially alternating arrangement, permanent-magnet pole includes mounting groove, permanent magnet is installed in mounting groove, polarity of the permanent magnet towards rotor core outer peripheral edge is same polarity, the first air groove and at least two second air grooves are provided on the rotor core of mounting groove radial outside, first air groove is located on pole center line, the circumferentially spaced setting of at least two second air grooves is simultaneously located at pole center line two sides, along the radial direction at the center far from rotor core, spacing between the side wall of the close pole center line of at least two second air grooves is gradually increased, first air groove is located at the extended region of at least two second air grooves.According to the rotor assembly of the application, the abundant caused torque pulsation of alternately pole winding back emf harmonic content can be effectively improved and increase problem, back-emf harmonic content is significantly reduced, improve motor performance.
Description
Technical field
This application involves technical field of motors, and in particular to a kind of rotor assembly and alternately pole motor.
Background technique
The permanent magnet quantity that alternately pole permanent-magnet synchronous machine uses is only the one of traditional permanent-magnetism synchronous motor permanent magnetic body quantity
Half, it is therefore, more abundant to the utilization of permanent magnet, permanent magnet usage amount can be significantly reduced, to reduce motor cost.
But its special magnetic structure also brings many problems, including permanent magnet usage amount reduces bring output and turns
The problem of square decline, adjacent pole structure asymmetry cause torque ripple to increase, limit the further genralrlization of alternately pole motor
Using.
Some alternately pole motors in the prior art are to improve torque ripple by optimization pole embrace, are primarily directed to
The torque ripple as caused by cogging torque, and for torque pulsation caused by non-sine back-emf, without effect, therefore, for
Torque pulsation caused by alternately winding back emf harmonic content in pole is abundant increases problem, and that plays is ineffective.
Summary of the invention
Therefore, the application technical problems to be solved are to provide a kind of rotor assembly and alternately pole motor, can be effective
Improve the abundant caused torque pulsation of alternately pole winding back emf harmonic content and increase problem, significantly reduces back-emf harmonic wave and contain
Amount improves motor performance.
To solve the above-mentioned problems, the application provides a kind of rotor assembly, including rotor core, and rotor core includes along week
To the permanent-magnet pole that is arranged alternately and alternately pole, permanent-magnet pole includes mounting groove, is equipped with permanent magnet in mounting groove, and permanent magnet is towards turning
The polarity of sub- outer diameter edge be same polarity, be provided on the rotor core of mounting groove radial outside the first air groove and
At least two second air grooves, the first air groove are located on pole center line, and at least two second air grooves are circumferentially spaced to be set
Set and be located at pole center line two sides, along far from rotor core center radial direction, at least two second air grooves
Spacing between the side wall of pole center line is gradually increased, and the first air groove is located at the expansion of at least two second air grooves
Region.
Preferably, the second air groove includes straightway and bending section close to the side wall of pole center line, and bending section is towards remote
Direction from pole center line tiltedly extends outwardly, and forms expansion regions between the opposite bending section of at least two second air grooves
Domain.
Preferably, the extended line of straightway passes through the central axis of rotor core.
Preferably, bending section is straightway or arc segment, and extended region is V-arrangement or U-shaped.
Preferably, the direction circumferentially extending away from pole center line is provided on the rotor core of the end of bending section
The first extended segment.
Preferably, in the plane perpendicular to the central axis of rotor core, the radially outward edge of two the first extended segments
It is a22, the radial direction of two straightways that the line at the center of endpoint and rotor core far from pole center line, which is formed by angle,
It is a21 that the line at the center of the outer end point and rotor core, which is formed by angle, wherein a21/a22=0.15~0.4.
Preferably, in the plane perpendicular to the central axis of rotor core, the two of the radially outward edge of the first air groove
It is a1, the radial outer end point and rotor core of two straightways that the line at the center of a endpoint and rotor core, which is formed by angle,
The line at center to be formed by angle be a21, wherein a1/a21=0.9~1.1.
Preferably, the radial thickness of the first air groove is t1, and the radial thickness of the second air groove is t2, t1/t2=0.1~
0.3。
Preferably, the both ends of mounting groove are respectively arranged with third air groove, and third air groove is from side wall to pole center line
Circumferentially extending forms the second extended segment.
Preferably, in the plane perpendicular to the central axis of rotor core, the radially outward edge of two the second extended segments
To be formed by angle be a31 to line close to the center of the endpoint and rotor core of pole center line, be located at adjacent permanent magnetic poles it
Between two third air grooves, radially outward edge close to alternately pole center line endpoint and rotor core center line institute
The angle of formation is a32, wherein a31/a32=0.8~1.
Preferably, in the plane perpendicular to the central axis of rotor core, the radially outward edge of two the second extended segments
It is a31 that line close to the center of the endpoint and rotor core of pole center line, which is formed by angle, permanent magnet it is radially outside
It is am that line of the edge close to two endpoints of pole center line and the center of rotor core, which is formed by angle, wherein a31/am=
0.7~0.95.
Preferably, when being provided with the first extended segment on rotor core, in the flat of the central axis perpendicular to rotor core
In face, the radially outward edge of two the first extended segments is far from the line at the center of the endpoint of pole center line and rotor core institute shape
At angle be a22, the radially outward edge of two the second extended segments is close to the endpoint of pole center line and the center of rotor core
Line to be formed by angle be a31, wherein a22/a31=0.4~0.6.
Preferably, permanent magnet is V-shaped.
Preferably, the second air groove is two, and two the second air grooves are symmetrical about pole center line.
According to the another aspect of the application, a kind of alternately pole motor, including rotor assembly and stator module, this turn are provided
Sub-component is above-mentioned rotor assembly.
Rotor assembly provided by the present application, including rotor core, rotor core include the permanent-magnet pole of circumferentially alternating arrangement
With alternately pole, permanent-magnet pole includes mounting groove, and permanent magnet, polarity of the permanent magnet towards rotor core outer peripheral edge are equipped in mounting groove
For same polarity, the first air groove and at least two second air are provided on the rotor core of mounting groove radial outside
Slot, the first air groove are located on pole center line, and the circumferentially spaced setting of at least two second air grooves is simultaneously located at pole center
Line two sides, along far from rotor core center radial direction, the close pole center line of at least two second air grooves
Spacing between side wall is gradually increased, and the first air groove is located at the extended region of at least two second air grooves.The rotor assembly
It, can by the way that the first air groove being located on pole center line and two the second air grooves positioned at pole center line two sides is arranged
It plans by the magnetic line of force of rotor core, the second air groove has from the outward shape feature in center, and by the
One air groove is wrapped in the extended region of opening, is distributed by the magnetic line of force that the second air groove adjusts pole center portion, by magnetic force
Line is gathered in pole center portion, and limits the magnetic line of force and assemble to direction of rotation side, and will be assembled by the first air groove
The magnetic line of force slowly divide to two sides, be unlikely to excessively to concentrate in pole center portion, avoid the increase for causing back-emf triple-frequency harmonics,
Back-emf peak position is shifted to an earlier date by the cooperation of the first air groove and the second air groove, reduces even harmonics content, is improved
Sine degree of back electromotive force is effectively improved the abundant caused torque pulsation of alternately pole winding back emf harmonic content and increases problem, significantly
Back-emf harmonic content is reduced, motor performance is improved.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the rotor assembly of the embodiment of the present application；
Fig. 2 is the dimensional structure figure of the rotor assembly of the embodiment of the present application；
Fig. 3 is the distribution diagram of magnetic line of force of the rotor assembly of the embodiment of the present application；
Fig. 4 is the counter potential waveform comparison diagram of the rotor assembly of the embodiment of the present application and the rotor assembly of the prior art；
Fig. 5 is the back-emf harmonic content comparison of the rotor assembly of the embodiment of the present application and the rotor assembly of the prior art
Figure；
Fig. 6 is the torque profile comparison diagram of the rotor assembly of the embodiment of the present application and the rotor assembly of the prior art；
The curve that Fig. 7 changes for the rotor assembly back-emf harmonic wave of the embodiment of the present application, electromagnetic torque content with a21/a22
Figure；
Fig. 8 is the curve graph that the rotor assembly torque ripple, electromagnetic torque of the embodiment of the present application change with a22/a31.
Appended drawing reference indicates are as follows:
1, rotor core；2, mounting groove；3, permanent magnet；4, the first air groove；5, the second air groove；6, third air groove；
7, straightway；8, bending section；9, the first extended segment；10, the second extended segment；11, stator module.
Specific embodiment
In conjunction with referring to shown in Fig. 1 to Fig. 8, according to an embodiment of the present application, rotor assembly includes rotor core 1, rotor iron
Core 1 includes permanent-magnet pole and the alternating pole of circumferentially alternating arrangement, and permanent-magnet pole includes mounting groove 2, is equipped with permanent magnet in mounting groove 2
3, polarity of the permanent magnet 3 towards 1 outer peripheral edge of rotor core is same polarity, on the rotor core 1 of 2 radial outside of mounting groove
The first air groove 4 and at least two second air grooves 5 are provided with, the first air groove 4 is located on pole center line, and at least two
The circumferentially spaced setting of two air groove 5 is simultaneously located at pole center line two sides, along the radial direction side at the center far from rotor core 1
To the spacing between the side wall of the close pole center line of at least two second air grooves 5 is gradually increased, the first air groove 4
In the extended region of at least two second air grooves 5.Below for ease of description, it is carried out by taking the structure in same permanent-magnet pole as an example
Explanation.
Alternately the extremely upper magnetic line of force of the alternating of pole motor lacks the constraint of permanent magnet, and due to armature-reaction, the magnetic line of force can be to turning
Son rotation side aggregation, the position for causing back-emf peak value to occur can be delayed backward not in the position of q axis alignment u phase winding
A bit, and then the even harmonics in back-emf harmonic wave is caused to increase, back-emf distortion is serious, due to the electric current being passed through in winding
For sine wave, therefore electric current causes torque pulsation to increase with the biggish back-emf effect of aberration rate.
And in this application, rotor assembly is located at by the way that the first air groove 4 being located on pole center line and two is arranged
Second air groove 5 of pole center line two sides can plan by the magnetic line of force of rotor core 1 that second air groove 5 has
Have from the outward shape feature in center, and the first air groove 4 is wrapped in the extended region of opening, passes through the second air groove
The magnetic line of force distribution in 5 adjustment pole center portions, is gathered in pole center portion for the magnetic line of force, and limit the magnetic line of force to direction of rotation
Side aggregation, and slowly being divided the magnetic line of force of aggregation to two sides by the first air groove 4, be unlikely to pole center portion excessively
It concentrates, as shown in figure 3, avoiding the increase for causing back-emf triple-frequency harmonics simultaneously, passes through the first air groove 4 and the second air groove 5
Cooperation back-emf peak position is shifted to an earlier date, as shown in figure 4, reduce even harmonics content, improve sine degree of back electromotive force, such as scheme
Shown in 5.The abundant caused torque pulsation of alternately pole winding back emf harmonic content can be effectively improved through the above way to increase
Problem significantly reduces back-emf harmonic content, improves motor performance.
Second air groove 5 includes straightway 7 and bending section 8 close to the side wall of pole center line, and bending section 8 is away from magnetic
The direction of pole center line tiltedly extends outwardly, and forms extended region between the opposite bending section 8 of at least two second air grooves 5.
Bending section 8 tiltedly extend outwardly away from the direction of pole center line, in particular to, the extending direction of bending section 8 includes separate
The radial direction of the circumferential direction of pole center line and the center far from rotor core 1, bending section is simultaneously away from magnetic pole
The direction at heart line and the center far from rotor core 1 extends.
Structure is extended out due to bending section 8, extended region, therefore energy can be formed in the intermediate region of two bending sections 8
Enough facilitate the setting for carrying out the first air groove 4 so that the first air groove 4 is located in extended region, while with circumferential direction two sides
Bending section 8 between formed interval, enable the magnetic line of force by interval be formed by magnetic circuit circulation.
First air groove 4 is the strip of circumferentially extending, and the outer radial periphery wall of the first air groove 4 is with rotor core 1
Center be the center of circle it is arc-shaped.First air groove 4 is, for example, rectangle, or fan-shaped or ellipse etc..First air groove
4 may be circle.
Preferably, the first air groove 4 is symmetrical about pole center line.
Preferably, the extended line of straightway 7 pass through rotor core 1 central axis so that the magnetic line of force into
When entering to the magnetic circuit of two 7 intermediate regions of straightway, the magnetic line of force can be arranged, improve the uniformity of magnetic line of force distribution.
Preferably, bending section 8 is straightway 7 or arc segment, and extended region is V-arrangement or U-shaped.Extended region may be
Other shapes, as long as can guarantee the direction along the central axis far from rotor core 1, two the second air grooves 5 it is close
Spacing between the side wall of pole center line is to be gradually increased.
Preferably, circumferentially prolong in the direction being provided on the rotor core 1 of the end of bending section 8 away from pole center line
The first extended segment 9 stretched.In the present embodiment, the first extended segment 9 is segmental arc circumferentially, and the first extended segment 9
The arc diameter of outer radial periphery wall is identical as the arc diameter of outer radial periphery wall of the first air groove 4, the outer radial periphery wall of the two
On same circumference.Symmetrical two sections of straightways 7 are arranged to the magnetic line of force release gathered, give the first air groove 4 further
It arranges, the magnetic line of force distribution near pole center line can be optimized, reduce back-emf harmonic wave.
In the plane of the central axis perpendicular to rotor core 1, the radially outward edge of two the first extended segments 9 is far from magnetic
It is a22, the radial outer end of two straightways 7 that the line at the center of the endpoint and rotor core 1 of pole center line, which is formed by angle,
It is a21 that point and the line at the center of rotor core 1, which are formed by angle, wherein a21/a22=0.15~0.4.Second air groove 5
External angle it is bigger, the space that the second air groove 5 occupies is bigger, and the magnetic resistance of formation is bigger, if magnetic resistance, which crosses conference, causes electricity
The sharply decline of magnetic torque.The inside angle of second air groove 5 is bigger, and the magnetic line of force assembled among magnetic pole is more, excessive meeting
Cause the distortion of magnetic flux density waveforms, it is therefore desirable between the overall circumferential width of two the second air grooves 5 of reasonable set and minimum circumferential direction
Every.Studies have shown that can preferably play the effect of the excessive and anti-magnetic flux density waveforms distortion of anti-magnetic resistance when a21/a22=0.15~0.4
Fruit, as shown in Figure 7.
In the plane of the central axis perpendicular to rotor core 1, two endpoints of the radially outward edge of the first air groove 4
Being formed by angle with the line at the center of rotor core 1 is a1, radial outer end point and the rotor core 1 of two straightways 7
It is a21 that the line at center, which is formed by angle, wherein a1/a21=0.9~1.1.The angle conference of first air groove 4 stop by
The flowing of the magnetic line of force of second air groove 5 modulation reduces output torque, and torque ripple increases.The angle of first air groove 4
It is too small that its modulating action can be made to weaken, it can not effectively weaken the air gap flux density in pole center portion, lead to the flux density in pole center portion
A prominent wedge angle, i.e. triple-frequency harmonics increase.Studies have shown that optimal effect can be obtained when a1/a21=0.9~1.1.
The radial thickness of first air groove 4 is t1, and the radial thickness of the second air groove 5 is t2, t1/t2=0.1~0.3.
Studies have shown that the thickness of the first air groove 4 there are optimum value, makes it that can suitably weaken the air gap flux density in pole center portion, makes
For the waveform of entire flux density just close to sine wave, harmonic content is minimum.The thickness of second air groove 5, which characterizes, gathers the magnetic line of force
Hold together ability, equally exists an optimum value.Studies have shown that when t1/t2=0.1~0.3, the first air groove 4 and the second air groove 5
Thickness proportion it is best, the air gap magnetic density waveform in pole center portion and the magnetic line of force can be made to gather ability and reach and preferably imitated
Fruit.
The both ends of mounting groove 2 are respectively arranged with third air groove 6, and third air groove 6 is circumferential from side wall to pole center line
Extend to form the second extended segment 10.By third air groove 6 adjust permanent-magnet pole with replace pole flux density be distributed symmetry, the two
No matter which side is bigger than normal or less than normal for flux density, can all cause the asymmetry of adjacent flux density distribution, cause the increase of torque ripple.Pass through
Increase the first air groove 4 and the second air groove 5 in pole center portion, so that it is interacted with third air groove 6, can effectively change
Kind flux density distribution, so that the technical solution of the application is substantially reduced torque ripple compared with the prior art, as shown in Figure 6.
In the plane of the central axis perpendicular to rotor core 1, the radially outward edge of two the second extended segments 10 is close
It is a31 that the line at the center of the endpoint and rotor core 1 of pole center line, which is formed by angle, between adjacent permanent magnetic poles
Two third air grooves 6, line institute shape of the radially outward edge close to the center of the endpoint and rotor core 1 of alternately pole center line
At angle be a32, wherein a31/a32=0.8~1.This ratio characterizes the polar arc ratio of adjacent pole, and ratio is smaller, permanent magnetism
Pole extremely descends flux density amplitude bigger, and alternately pole flux density is smaller, and flux density asymmetry increases, otherwise ratio is bigger, pole shoe under permanent-magnet pole
Width is wider, smaller to the effect of contraction of the magnetic line of force, and flux density is also smaller, and alternating extremely descends flux density larger, and flux density asymmetry is same
Increase.Studies have shown that the flux density symmetry of a31/a32=0.8~1 is best.
In the plane of the central axis perpendicular to rotor core 1, the radially outward edge of two the second extended segments 10 is close
It is a31, the radially outward edge of permanent magnet 3 that the line at the center of the endpoint and rotor core 1 of pole center line, which is formed by angle,
It is am that line close to the center of two endpoints and rotor core 1 of pole center line, which is formed by angle, wherein a31/am=
0.7~0.95.If the ratio is excessive, will lead to can not form effective flux density under permanent-magnet pole, if the ratio is too small, the
Two extended segments 10 can stop the magnetic line of force too much, cause permanent magnet utilization rate low, studies have shown that 0.7~0.95 effect is best, both
Effective flux density can be formed under permanent-magnet pole, and can be avoided the excessive blocking magnetic line of force, improve permanent magnet utilization rate.
When being provided with the first extended segment 9 on rotor core 1, in the plane of the central axis perpendicular to rotor core 1,
The line of endpoint and the center of rotor core 1 of the radially outward edge of two the first extended segments 9 far from pole center line is formed
Angle be a22, the radially outward edge of two the second extended segments 10 is close to the endpoint of pole center line and the center of rotor core 1
Line to be formed by angle be a31, wherein a22/a31=0.4~0.6.The ratio is bigger, the sky that the second air groove 5 occupies
Between it is more, the magnetic resistance of formation is bigger, crosses conference and causes the decline of electromagnetic torque.The ratio is too small to allow the second air groove 5 can be with
The magnetic figure quantitative change of adjustment is few, to can not effectively optimize torque ripple.Studies have shown that the timeliness of a22/a31=0.4~0.6
Fruit is best, as shown in Figure 8.
Preferably, permanent magnet 3 is V-shaped.The optimization of alternately pole motor torque fluctuation is concentrated mainly in the prior art
One type permanent magnet Consequent pole permanent magnet motor, V-type permanent magnet replace pole motor since permanent magnet submerged depth is big, and Existing policies are difficult
Its torque ripple is effectively optimized.
And after using the scheme of the application, slot composite structure is arranged using progressive flux, by the magnetic force in pole center portion
Line transfers to second layer flux arrangement slot further to adjust after gathering, therefore can be empty using second in the biggish region of length of embedment
The expansion initiation region lesser feature of area occupied of air drain 5 tentatively adjusts the magnetic line of force, enables the magnetic line of force
Reach extended region under the influence of two air grooves 5, and can be in extended region by the first air groove 4 and the second air groove 5
It adjusts, the magnetic line of force of aggregation is slowly divided to two sides, is unlikely to excessively to concentrate in pole center portion, so that for V-type permanent magnet
Torque adjusting become a reality, can further decrease torque ripple compared with prior art, improve motor working performance.
Preferably, the second air groove 5 is two, and two the second air grooves 5 are symmetrical about pole center line.
Rotor core 1 be overrided to form using soft magnetic materials thin slice.
According to an embodiment of the present application, alternately pole motor includes rotor assembly and stator module 11, which is upper
The rotor assembly stated.
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 only the preferred embodiments of the application, not to limit the application, it is all in spirit herein and
Made any modifications, equivalent replacements, and improvements etc., should be included within the scope of protection of this application within principle.Above only
It is the preferred embodiment of the application, it is noted that for those skilled in the art, do not departing from this Shen
Several improvements and modifications please can also be made, these improvements and modifications also should be regarded as the guarantor of the application under the premise of technical principle
Protect range.
Claims (15)
1. a kind of rotor assembly, which is characterized in that including rotor core (1), the rotor core (1) includes circumferentially alternating row
The permanent-magnet pole of cloth and alternately pole, the permanent-magnet pole includes mounting groove (2), is equipped with permanent magnet (3), institute in the mounting groove (2)
Stating polarity of the permanent magnet (3) towards rotor core (1) outer peripheral edge is same polarity, is located at the mounting groove (2) radial outside
The first air groove (4) and at least two second air grooves (5), first air groove (4) are provided on the rotor core (1)
On pole center line, at least two second air groove (5) is circumferentially spaced to be arranged and is located at the pole center line
Two sides, along far from the rotor core (1) center radial direction, at least two second air groove (5) it is close
Spacing between the side wall of the pole center line is gradually increased, and first air groove (4) is located at described at least two second
The extended region of air groove (5).
2. rotor assembly according to claim 1, which is characterized in that second air groove (5) is in the magnetic pole
The side wall of heart line includes straightway (7) and bending section (8), direction of the bending section (8) away from the pole center line
Tiltedly extend outwardly, forms the extended region between the opposite bending section (8) of at least two second air groove (5).
3. rotor assembly according to claim 2, which is characterized in that the extended line of the straightway (7) turns by described
The central axis of sub- iron core (1).
4. rotor assembly according to claim 2, which is characterized in that the bending section (8) is straightway (7) or camber line
Section, the extended region are V-arrangement or U-shaped.
5. rotor assembly according to claim 2, which is characterized in that the rotor iron of the end of the bending section (8)
The first extended segment (9) of the direction circumferentially extending away from pole center line is provided on core (1).
6. rotor assembly according to claim 5, which is characterized in that in the central axis perpendicular to the rotor core (1)
In the plane of line, endpoint of the radially outward edge of two first extended segments (9) far from pole center line and the rotor iron
It is a22, the radial outer end point and the rotor iron of two straightways (7) that the line at the center of core (1), which is formed by angle,
It is a21 that the line at the center of core (1), which is formed by angle, wherein a21/a22=0.15~0.4.
7. rotor assembly according to claim 2, which is characterized in that in the central axis perpendicular to the rotor core (1)
In the plane of line, the company at the center of the two endpoints and rotor core (1) of the radially outward edge of first air groove (4)
It is a1, the line at the center of the radial outer end point and rotor core (1) of two straightways (7) that line, which is formed by angle,
Being formed by angle is a21, wherein a1/a21=0.9~1.1.
8. rotor assembly according to claim 1, which is characterized in that the radial thickness of first air groove (4) is t1,
The radial thickness of second air groove (5) is t2, t1/t2=0.1~0.3.
9. the rotor assembly according to any one of claim 2 to 7, which is characterized in that the both ends of the mounting groove (2) point
It is not provided with third air groove (6), the third air groove (6) circumferentially extends to form the second extension from side wall to pole center line
Section (10).
10. rotor assembly according to claim 9, which is characterized in that in the central axis perpendicular to the rotor core (1)
In the plane of line, the endpoint and the rotor iron of the radially outward edges of two second extended segments (10) close to pole center line
It is a31 that the line at the center of core (1), which is formed by angle, two between adjacent permanent magnetic poles third air groove (6), diameter
Being formed by angle to the line at the center of the endpoint and rotor core (1) of the close alternately pole center line of outer edge is a32,
Wherein a31/a32=0.8~1.
11. rotor assembly according to claim 9, which is characterized in that in the central axis perpendicular to the rotor core (1)
In the plane of line, the endpoint and the rotor iron of the radially outward edges of two second extended segments (10) close to pole center line
It is a31 that the line at the center of core (1), which is formed by angle, and the radially outward edge of the permanent magnet (3) is close to pole center line
It is am that the line at the center of two endpoints and the rotor core (1), which is formed by angle, wherein a31/am=0.7~0.95.
12. rotor assembly according to claim 9, which is characterized in that prolong when being provided with first on the rotor core (1)
When stretching section (9), in the plane of the central axis perpendicular to the rotor core (1), the diameter of two first extended segments (9)
It is a22 that the line at the center of endpoint to outer edge far from pole center line and the rotor core (1), which is formed by angle, two
The radially outward edge of a second extended segment (10) is close to the endpoint of pole center line and the center of the rotor core (1)
It is a31 that line, which is formed by angle, wherein a22/a31=0.4~0.6.
13. rotor assembly according to any one of claim 1 to 8, which is characterized in that the permanent magnet (3) is V word
Shape.
14. rotor assembly according to any one of claim 1 to 8, which is characterized in that second air groove (5) is
Two, two second air grooves (5) are symmetrical about pole center line.
15. a kind of alternately pole motor, including rotor assembly and stator module (11), which is characterized in that the rotor assembly is power
Benefit require any one of 1 to 14 described in rotor assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910713410.3A CN110401282A (en) | 2019-08-02 | 2019-08-02 | Rotor assembly and alternately pole motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910713410.3A CN110401282A (en) | 2019-08-02 | 2019-08-02 | Rotor assembly and alternately pole motor |
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| CN110401282A true CN110401282A (en) | 2019-11-01 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110994839A (en) * | 2019-12-16 | 2020-04-10 | 珠海格力电器股份有限公司 | Electric motor rotor and alternating-pole electric motor |
| 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 |
| CN111082561A (en) * | 2019-12-16 | 2020-04-28 | 珠海格力电器股份有限公司 | Electric motor rotor and alternating-pole electric motor |
| CN112910133A (en) * | 2021-02-07 | 2021-06-04 | 珠海格力电器股份有限公司 | Motor rotor, motor, car |
| EP3937351A1 (en) * | 2020-07-09 | 2022-01-12 | Jing-Jin Electric Technologies Co., Ltd. | Rotor structure of interior permanent magnet motor |
| CN114362397A (en) * | 2022-02-21 | 2022-04-15 | 小米汽车科技有限公司 | Punching sheet structure, rotor assembly and motor |
| CN114629268A (en) * | 2022-02-16 | 2022-06-14 | 珠海英搏尔电气股份有限公司 | Motor rotor, motor and vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994839A (en) * | 2019-12-16 | 2020-04-10 | 珠海格力电器股份有限公司 | Electric motor rotor and alternating-pole electric motor |
| 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 |
| CN111082561A (en) * | 2019-12-16 | 2020-04-28 | 珠海格力电器股份有限公司 | Electric motor rotor and alternating-pole electric motor |
| 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 |
| EP3937351A1 (en) * | 2020-07-09 | 2022-01-12 | Jing-Jin Electric Technologies Co., Ltd. | Rotor structure of interior permanent magnet motor |
| US11699931B2 (en) | 2020-07-09 | 2023-07-11 | Jing-Jin Electric Technologies Co., Ltd. | Rotor structure of interior permanent magnet motor |
| CN112910133A (en) * | 2021-02-07 | 2021-06-04 | 珠海格力电器股份有限公司 | Motor rotor, motor, car |
| CN112910133B (en) * | 2021-02-07 | 2021-12-24 | 珠海格力电器股份有限公司 | Motor rotor, motor, car |
| CN114629268A (en) * | 2022-02-16 | 2022-06-14 | 珠海英搏尔电气股份有限公司 | Motor rotor, motor and vehicle |
| CN114362397A (en) * | 2022-02-21 | 2022-04-15 | 小米汽车科技有限公司 | Punching sheet structure, rotor assembly and motor |
| CN114362397B (en) * | 2022-02-21 | 2022-11-18 | 小米汽车科技有限公司 | Punching sheet structure, rotor assembly and motor |
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