CN110380540A - Rotor assembly and alternating-pole motor - Google Patents
Rotor assembly and alternating-pole motor Download PDFInfo
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- CN110380540A CN110380540A CN201910713928.7A CN201910713928A CN110380540A CN 110380540 A CN110380540 A CN 110380540A CN 201910713928 A CN201910713928 A CN 201910713928A CN 110380540 A CN110380540 A CN 110380540A
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- rotor core
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 102220028782 rs151302743 Human genes 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 230000010349 pulsation Effects 0.000 abstract description 8
- 230000005389 magnetism Effects 0.000 abstract description 5
- 230000004907 flux Effects 0.000 description 28
- 230000008859 change Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
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- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009399 inbreeding Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 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]
- 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
-
- 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)
Abstract
The application provides a rotor assembly and a consequent pole motor. This rotor subassembly includes rotor core (1), rotor core (1) includes the permanent magnetism pole and the alternative pole of arranging in turn along circumference, and the permanent magnetism pole includes mounting groove (2), installs permanent magnet (3) in mounting groove (2), and permanent magnet (3) are same polarity towards the polarity of rotor core (1) outer peripheral edges, and the alternative pole includes the alternative pole central line, is provided with first air groove (4) on the alternative pole, and first air groove (4) set up in the alternative pole and are close to one side of the alternative pole central line. According to the rotor assembly, the problem of torque pulsation increase caused by abundant back electromotive force harmonic content of the alternating-pole motor can be effectively solved, the back electromotive force harmonic content is remarkably reduced, and the motor performance is improved.
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 adjacent pole structure is inconsistent leads to air gap magnetic
Close distribution is asymmetric, and then causes back-emf percent harmonic distortion high, is no longer sinusoidal waveform, non-sine back-emf and input are just
String Interaction Law of Electric Current generates torque, and torque pulsation will increase, and limits the further genralrlization application of alternately pole motor.
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, alternately pole include alternately pole center line, alternately extremely on be provided with the first air groove,
First air groove is arranged in alternately extremely close to the side of alternately pole center line.
Preferably, the first air groove radially extending along rotor core.
Preferably, the first air groove is two, is separately positioned on the two sides of alternately pole center line.
Preferably, two the first air grooves are symmetrical about alternately pole center line.
Preferably, in the plane perpendicular to the central axis of rotor core, the radial outside of two the first air grooves is leaned on
It is a81 that inbreeding, which is formed by angle for the line of the endpoint of pole center line and the center of rotor core, two the first air grooves
It is a82 that the line at the center of endpoint and rotor core of the radial outside far from alternately pole center line, which is formed by angle, wherein
A81/a82=0.2~0.4.
Preferably, the relationship between the radial thickness t8 and circumferential width w8 of the first air groove meet t8/w8=0.2~
0.4。
Preferably, permanent-magnet pole includes pole center line, and the second air groove is provided on pole center line.
Preferably, circumferentially extending of second air groove along rotor core.
Preferably, the relationship between the radial thickness t6 and circumferential width w6 of the second air groove meet t6/w6=0.2~
0.4。
Preferably, the two sides of pole center line are respectively arranged with third air groove.
Preferably, third air groove is two, and two third air grooves are symmetrical about pole center line.
Preferably, the relationship between the radial thickness t6 of the second air groove and the radial thickness t7 of third air groove meets
T6/t7=0.3~0.7.
Preferably, in the plane perpendicular to the central axis of rotor core, the radial outside of two third air grooves is leaned on
It is a72, the diameter of two third air grooves that the line at the center of the endpoint and rotor core of nearly pole center line, which is formed by angle,
It is a71 that the line at the center of endpoint and rotor core outward far from pole center line, which is formed by angle, wherein a72/a71
=0.2~0.4.
Preferably, the both ends of mounting groove are respectively arranged with the 4th air groove, and the 4th air groove is close to the one of pole center line
Lateral pole center line extends to form the first slit, and the 4th air groove one is laterally away from pole center line far from pole center line
Direction extend to form the second slit.
Preferably, in the plane perpendicular to the central axis of rotor core, two positioned at same permanent-magnet pole are first narrow
It is a51 that line of the radial outside of slot close to the endpoint of pole center line and the center of rotor core, which is formed by angle, is located at
The radial outside of two the second slits of same permanent-magnet pole is far from the line at the center of the endpoint of pole center line and rotor core
Being formed by angle is a52, wherein a51/a52=0.3~0.5.
Preferably, when permanent-magnet pole includes two third air grooves, in the plane perpendicular to the central axis of rotor core,
The line at the center of endpoint and rotor core of the radial outside of two third air grooves far from pole center line is formed by folder
Angle is a71, positioned at same permanent-magnet pole two the first slits radial outside close to pole center line endpoint and rotor core
The line at center to be formed by angle be a51, wherein a71/a51=0.3~0.5.
Preferably, when permanent-magnet pole includes two the first air grooves, in the plane perpendicular to the central axis of rotor core,
The line at the center of endpoint and rotor core of the radial outside of two the first air grooves far from alternately pole center line is formed by
Angle is a82, positioned at the endpoint and rotor of the close alternately pole center line of the radial outside of alternately two the second slits of pole two sides
It is a53 that the line at the center of iron core, which is formed by angle, wherein a82/a53=0.1~0.25.
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, alternately pole includes alternately pole center line, alternately extremely on be provided with the first air groove, the setting of the first air groove is being handed over
For extremely close to the side of alternately pole center line.The rotor assembly alternately pole middle part increase the first air groove by way of,
It enables to the magnetic conductance at alternately pole center to change, prevents flux density from excessively concentrating at this, improve the magnetic line of force of alternately pole
Distribution, so that torque ripple be effectively reduced, it is humorous to improve alternately pole winding back emf so that alternately magnetic line of force distribution in pole is more uniform
Torque pulsation caused by wave rich content increases problem, significantly reduces back-emf harmonic content, improves motor performance.
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 rotor assembly of the embodiment of the present application and the back-emf comparison diagram of the prior art；
Fig. 3 is that the rotor assembly of the embodiment of the present application and the back-emf harmonic contrast of the prior art scheme；
Fig. 4 is that the rotor assembly of the embodiment of the present application and the torque versus of the prior art scheme.
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, the 4th air groove；8, the first slit；9, the second slit.
Specific embodiment
In conjunction with referring to FIG. 1 to FIG. 4, 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, permanent magnet 3 towards 1 outer peripheral edge of rotor core polarity be same polarity, alternately pole include alternately pole center line, alternately extremely on
It is provided with the first air groove 4, the first air groove 4 is arranged in alternately extremely close to the side of alternately pole center line.First air groove 4 is set
It sets to refer to the assumption that in the alternately side of extremely close alternately pole center line and alternately pole is divided into two along alternately pole center line, then
For being located at the alternately alternating pole of the first side of pole center line, the first air groove 4 be arranged in alternately pole in alternately extremely
The side of heart line, the first air groove 4 can be located on alternately pole center line, can also be located at the side of alternately pole center line.?
It is believed that the first air groove 4 is the middle part that the alternately circumferential direction of pole is arranged in.
The rotor assembly is enabling to alternately pole center in such a way that the middle part of alternately pole increases by the first air groove 4
The magnetic conductance at place changes, and prevents flux density from excessively concentrating at this, improves the magnetic line of force distribution of alternately pole, so that alternately pole magnetic force
Line distribution is more uniform, so that torque ripple be effectively reduced, improves caused by alternately winding back emf harmonic content in pole is abundant and turns
Square pulsation increase problem, significantly reduces back-emf harmonic content, improves motor performance.
The first air groove 4 is arranged by the middle section close to alternately pole center line in alternately pole in the application, it can
Non-sine back-emf in back-emf is adjusted, magnetic line of force distributional pattern is changed, its flux density is made to be distributed more sinusoidalization, from
And back-emf harmonic content can be significantly reduced, further decrease torque pulsation.
Rotor core 1 uses disc type notching construction, is overrided to form by soft magnetic materials thin slice, is opened at 1 center of rotor core
There is rotor shaft hatch, array permanent magnet mounting groove 2 is offered on rotor core 1, permanent magnet mounting groove 2 is close to rotor core 1
Outer edge, and number is equal with alternately number of poles mesh；Rotating pole-piece is formed between permanent magnet mounting groove 2 and rotor outer circle.Preferably,
In the present embodiment, permanent magnet 3 uses "-" type structure.
Preferably, the first radially extending along rotor core 1 of air groove 4.Because the magnetic line of force in permanent-magnet pole is along radial direction
Radial transmitting to alternately pole, is then closed by rotor core 1, the first radial air groove 4, which can play the magnetic line of force, leads
To effect, if not radially extend, but circumferentially extend, then can significantly increase alternately extremely on magnetic resistance, reduce torque.
Preferably, the first air groove 4 is two, is separately positioned on the two sides of alternately pole center line.Two the first air grooves 4
It can have identical structure, and radially extending along rotor core 1, so that back-emf be made to increase, torque ripple reduces, drop
Low back-emf harmonic content improves motor performance.
Preferably, two the first air grooves 4 are symmetrical about alternately pole center line.
Preferably, when the first air groove 4 is one, which is located on alternately pole center line.
In the plane of the central axis perpendicular to rotor core 1, the radial outside of two the first air grooves 4 is close to alternately
It is a81, the radial direction of two the first air grooves 4 that the line at the center of the endpoint and rotor core 1 of pole center line, which is formed by angle,
It is a82 that the line at the center of endpoint and rotor core 1 of the outside far from alternately pole center line, which is formed by angle, wherein a81/
A82=0.2~0.4.
By the value of reasonable set a81/a82, the inside edge that can be avoided two the first air grooves 4 is adjacent excessively close and goes out
Show magnetic saturation, while apart can lead to replace the two sides flux density mistake on extremely too far to avoid the outer edge of two the first air grooves
Improve flux density distribution so as to more efficiently reduce the flux density on alternately pole center line in concentration, reduce torque ripple.
Preferably, the relationship between the radial thickness t8 and circumferential width w8 of the first air groove 4 meet t8/w8=0.2~
0.4.Because the major advantage of the first air groove 4 is to change the magnetic conductance at alternately pole center, so as to improve flux density distribution, if
T8/w8 ratio is too small, then illustrates that t8 is too small or w8 is excessive, and the too small flux density distribution for obviously being not enough to improve at this of t8, and w8
The excessive magnetic resistance that obviously can excessively increase again alternately in extremely circumferential direction, influences torque；Likewise, illustrating if t8/w8 ratio is excessive
T8 is excessive or w8 is too small, and excessive also will increase of t8 replaces the upward magnetic resistance of polar diameter, influences torque, if w8 too small, and be not enough to
Improve flux density distribution, thus setting t8/w8=0.2~0.4, it can be while being effectively improved flux density distribution, and it will not be excessive
Increase the magnetic resistance replaced on extremely, influences torque.
Permanent-magnet pole includes pole center line, and the second air groove 5 is provided on pole center line.In the present embodiment, second
Air groove 5 is positioned close to the position of the outer peripheral edge of rotor core 1, and symmetrical about pole center line.By in pole center
Second air groove 5 is set on line, can reduce the flux density being located at pole center line in permanent-magnet pole, further avoid adjacent pole
Between flux density asymmetry, to reduce torque ripple, at the same can also reduce due to flux density it is asymmetric caused by even-order harmonic, such as
Shown in Fig. 3.
Preferably, circumferentially extending of second air groove 5 along rotor core 1.
The two sides of pole center line are respectively arranged with third air groove 6, and the second air groove 5 is located at third air groove 6
Radial outside.Form gap between two third air grooves 6, therefore the magnetic line of force after the sending of permanent magnet 3, will receive two the
The influence of three air grooves 6, and gather concentration on the rotor core 1 among two third air grooves 6, later by positioned at alternating
The influence of the second air groove 5 on the center line of pole, the magnetic line of force gathered can not pass through from the position of the second air groove 5, therefore meeting
Pass through after dispersion from the two sides of the second air groove 5, so that the polymerization dispersion process to the magnetic line of force is realized, to the abnormal of the magnetic line of force
It is deformed into and is effectively improved.
Preferably, third air groove 6 is two, and two third air grooves 6 are symmetrical about pole center line.Third air groove
6 can effectively avoid the magnetic line of force from excessively concentrating in the two sides of the second air groove 5, and the distribution by changing the magnetic line of force keeps flux density more equal
It is even, it is distributed to improve the magnetic line of force on permanent magnetism magnetic pole jointly with the second air groove 5, keeps flux density more uniform, reduce torque wave
It is dynamic.
First air groove 4, the second air groove 5 and third air groove 6 cooperate, and enable to alternately pole and permanent-magnet pole shape
Optimize at combined type, so that not being focusing only on permanent-magnet pole for the improvement of torque ripple, can also be embodied in alternately pole, from
And guarantee that the optimization of torque ripple will not change with the variation of rotor turned position, magneto can not only be reduced and turned
Torque ripple during dynamic, and can guarantee carry out torque ripple in the entire rotation process of rotor assembly excellent
Change, further improves motor performance, improve motor job stability.
The both ends of mounting groove 2 are respectively arranged with the 4th air groove 7, the 4th air groove 7 close to a side of pole center line to
Pole center line extends to form the first slit 8, and the 4th air groove 7 one is laterally away from pole center line far from pole center line
Direction extends to form the second slit 9.Preferably, the first slit 8 is identical with the structure of the second slit 9, and extending direction is opposite.First
Slit 8 and the second slit 9 change permanent-magnet pole and alternately extremely on magnetic conductance, make permanent-magnet pole with replace the flux density that is distributed on interpolar more
Add uniform, symmetrical, effectively reduces torque ripple.
In the present embodiment, the relationship between the radial thickness t6 and circumferential width w6 of the second air groove 5 meets t6/w6=
0.2~0.4.Second air groove 5 cannot be excessively close with rotor outer periphery edge, in order to avoid forming narrow magnetic bridge, collects magnetic bridge flux density excessively
In, flux density distribution is influenced, and then influence motor performance；Meanwhile second the thickness and width of air groove 5 can not be excessive, in order to avoid
Increase the flux density between the second air groove 5 and two third air grooves 6, reduces the intensity of punching, therefore t6 and w6 ratio need to expire
Sufficient t6/w6=0.2~0.4.
Preferably, the relationship between the radial thickness t6 of the second air groove 5 and the radial thickness t7 of third air groove 6 meets
T6/t7=0.3~0.7 avoids the occurrence of flux density mistake so as to which the flux density distribution of punching intensity and permanent magnetism interpolar is effectively ensured
Greatly, cause the flux density between adjacent pole asymmetric, cause torque ripple.
In the plane of the central axis perpendicular to rotor core 1, the radial outside of two third air grooves 6 is close to magnetic pole
It is a72 that the line at the center of the endpoint and rotor core 1 of center line, which is formed by angle, and the diameter of two third air grooves 6 is outside
It is a71 that the line at the center of endpoint of the side far from pole center line and rotor core 1, which is formed by angle, wherein a72/a71=
0.2~0.4.By the circumferential width of two third air grooves 6 of setting and its circumferentially-spaced, it can be further ensured that punching intensity
And the flux density distribution of permanent magnetism interpolar, it avoids the occurrence of that flux density is excessive, causes the flux density between adjacent pole asymmetric, cause torque wave
It is dynamic.
When permanent-magnet pole includes two third air grooves 6, in the plane of the central axis perpendicular to rotor core 1, two
The line at the center of endpoint of the radial outside of third air groove 6 far from pole center line and rotor core 1 is formed by angle
For a71, positioned at same permanent-magnet pole two the first slits 8 radial outside close to pole center line endpoint and rotor core 1
The line at center to be formed by angle be a51, wherein a71/a51=0.3~0.5.
Emulation shows when meeting t6/t7=0.3~0.7, a72/a71=0.2~0.4 and a71/a51=0.3~0.5
When these three ratio ranges, back-emf peak value is bigger, and waveform is more sinusoidal, as shown in Fig. 2, torque is bigger, as shown in Figure 4.
In the plane of the central axis perpendicular to rotor core 1, positioned at the diameter of two the first slits 8 of same permanent-magnet pole
It is a51 that the line close to the endpoint of pole center line Yu the center of rotor core 1, which is formed by angle, outward, be located at it is same forever
The line institute shape at the center of endpoint of the radial outside of two the second slits 9 of magnetic pole far from pole center line and rotor core 1
At angle be a52, wherein a51/a52=0.3~0.5.First slit 8 and the second slit 9 are close to the outer peripheral edge of rotor core 1
Position cannot be excessively close, to prevent magnetic saturation, in addition, the first slit 8 and the second slit 9 cannot extend to two sides it is excessive,
In order to avoid concentrating the flux density in permanent-magnet pole too, so the ratio of a51 and a52 needs to meet a51/a52=0.3~0.5, ability
It is enough avoid the occurrence of it is magnetically saturated avoid the flux density in permanent-magnet pole from too concentrating simultaneously, improve the working performance of motor.
When permanent-magnet pole includes two the first air grooves 4, in the plane of the central axis perpendicular to rotor core 1, two
The line at the center of endpoint and rotor core 1 of the radial outside of the first air groove 4 far from alternately pole center line is formed by folder
Angle is a82, and the radial outside positioned at alternately two the second slits 9 of pole two sides is close to the alternately endpoint of pole center line and rotor iron
It is a53 that the line at the center of core 1, which is formed by angle, wherein a82/a53=0.1~0.25.The angle, which is arranged, can guarantee
Alternating pole magnetic yoke between one air groove 4 and the second slit 9 has certain circumferential width, not too big or too small, no matter a82 mistake
Big or a53 is too small, can reduce the circumferential width in alternately pole magnetic yoke, increase magnetic resistance, influence the magnetic force issued from permanent-magnet pole
Line passes through alternately that pole magnetic yoke is by rotor core closure, and a82 is too small or a53 is excessive, then cannot sufficiently, effectively improve flux density
Distribution, to achieve the purpose that reduce torque ripple.
According to an embodiment of the present application, alternately pole motor includes rotor assembly and stator module, which is above-mentioned
Rotor assembly.
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 (18)
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, and the alternately pole includes alternating pole center line,
The alternating extremely on be provided with the first air groove (4), first air groove (4) is arranged in the alternating extremely close to the alternating
The side of pole center line.
2. rotor assembly according to claim 1, which is characterized in that first air groove (4) is along the rotor core
(1) radially extend.
3. rotor assembly according to claim 1, which is characterized in that first air groove (4) is two, is respectively set
In the two sides of the alternately pole center line.
4. rotor assembly according to claim 3, which is characterized in that described two first air grooves (4) are about the friendship
It is symmetrical for pole center line.
5. rotor assembly according to claim 3, which is characterized in that in the central axis perpendicular to the rotor core (1)
In the plane of line, the radial outside of described two first air grooves (4) is close to the alternately endpoint of pole center line and described turn
It is a81 that the line at the center of sub- iron core (1), which is formed by angle, and the radial outside of described two first air grooves (4) is far from institute
It is a82 that the line for stating the alternately center of the endpoint and rotor core (1) of pole center line, which is formed by angle, wherein a81/
A82=0.2~0.4.
6. rotor assembly according to claim 3, which is characterized in that the radial thickness t8 of first air groove (4) and
Relationship between circumferential width w8 meets t8/w8=0.2~0.4.
7. rotor assembly according to any one of claim 1 to 6, which is characterized in that the permanent-magnet pole includes in magnetic pole
Heart line is provided with the second air groove (5) on the pole center line.
8. rotor assembly according to claim 7, which is characterized in that second air groove (5) is along the rotor core
(1) circumferentially extending.
9. rotor assembly according to claim 8, which is characterized in that the radial thickness t6 of second air groove (5) and
Relationship between circumferential width w6 meets t6/w6=0.2~0.4.
10. rotor assembly according to claim 7, which is characterized in that the two sides of the pole center line are respectively arranged with
Third air groove (6).
11. rotor assembly according to claim 10, which is characterized in that the third air groove (6) be two, described two
A third air groove (6) is symmetrical about the pole center line.
12. rotor assembly according to claim 11, which is characterized in that the radial thickness t6 of second air groove (5)
Relationship between the radial thickness t7 of the third air groove (6) meets t6/t7=0.3~0.7.
13. rotor assembly according to claim 11, which is characterized in that at the center perpendicular to the rotor core (1)
In the plane of axis, the radial outside of described two third air grooves (6) is close to the endpoint of the pole center line and described turn
It is a72 that the line at the center of sub- iron core (1), which is formed by angle, and the radial outside of described two third air grooves (6) is far from institute
It is a71 that the line for stating the endpoint of pole center line and the center of the rotor core (1), which is formed by angle, wherein a72/a71
=0.2~0.4.
14. the rotor assembly according to any one of claim 8 to 13, which is characterized in that the both ends of the mounting groove (2)
It is respectively arranged with the 4th air groove (7), the 4th air groove (7) is close to a side of the pole center line into the magnetic pole
Heart line extends to form the first slit (8), and the one of the separate pole center line of the 4th air groove (7) is laterally away from the magnetic
The direction of pole center line extends to form the second slit (9).
15. rotor assembly according to claim 14, which is characterized in that at the center perpendicular to the rotor core (1)
In the plane of axis, positioned at same permanent-magnet pole two first slits (8) radial outside close to the pole center line
Endpoint and the line at center of the rotor core (1) to be formed by angle be a51, described in two of same permanent-magnet pole
The line institute at the center of endpoint of the radial outside of the second slit (9) far from the pole center line and the rotor core (1)
The angle of formation is a52, wherein a51/a52=0.3~0.5.
16. rotor assembly according to claim 14, which is characterized in that the permanent-magnet pole includes two third air grooves
(6) when, in the plane of the central axis perpendicular to the rotor core (1), the diameter of described two third air grooves (6) is outside
It is a71 that the line at the center of endpoint of the side far from the pole center line and the rotor core (1), which is formed by angle, is located at
Endpoint and the rotor iron of the radial outside of first slit (8) of two of same permanent-magnet pole close to the pole center line
It is a51 that the line at the center of core (1), which is formed by angle, wherein a71/a51=0.3~0.5.
17. rotor assembly according to claim 14, which is characterized in that the permanent-magnet pole includes two the first air grooves
(4) when, in the plane of the central axis perpendicular to the rotor core (1), the diameter of described two first air grooves (4) is outside
It is a82, position that the line at the center of the endpoint and rotor core (1) of the side far from the alternately pole center line, which is formed by angle,
In it is described alternately pole two sides two second slits (9) radial outside close to it is described alternately pole center line endpoint and institute
It is a53 that the line for stating the center of rotor core (1), which is formed by angle, wherein a82/a53=0.1~0.25.
18. a kind of alternately pole motor, including rotor assembly and stator module, which is characterized in that the rotor assembly is wanted for right
Rotor assembly described in asking any one of 1 to 17.
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|---|---|---|---|
| CN201910713928.7A CN110380540A (en) | 2019-08-02 | 2019-08-02 | Rotor assembly and alternating-pole motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910713928.7A CN110380540A (en) | 2019-08-02 | 2019-08-02 | Rotor assembly and alternating-pole motor |
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| CN110380540A true CN110380540A (en) | 2019-10-25 |
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| CN201910713928.7A Pending CN110380540A (en) | 2019-08-02 | 2019-08-02 | Rotor assembly and alternating-pole motor |
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Cited By (1)
| 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 |
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| CN209948821U (en) * | 2019-08-02 | 2020-01-14 | 珠海格力电器股份有限公司 | Rotor assembly and alternating-pole motor |
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| WO2016053352A1 (en) * | 2014-10-03 | 2016-04-07 | Abb Technology Ag | Rotor for consequent pole permanent magnet machine |
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