CN109742879A - A kind of rotor structure for permanent magnet motor - Google Patents
A kind of rotor structure for permanent magnet motor Download PDFInfo
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- CN109742879A CN109742879A CN201910106131.0A CN201910106131A CN109742879A CN 109742879 A CN109742879 A CN 109742879A CN 201910106131 A CN201910106131 A CN 201910106131A CN 109742879 A CN109742879 A CN 109742879A
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- 229910000831 Steel Inorganic materials 0.000 claims description 68
- 239000010959 steel Substances 0.000 claims description 68
- 238000004080 punching Methods 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000002146 bilateral effect Effects 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims 1
- 230000004907 flux Effects 0.000 abstract description 27
- 244000079889 Cymbidium pendulum Species 0.000 abstract description 6
- 238000013459 approach Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
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- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
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- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
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- 230000001360 synchronised effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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Abstract
The invention discloses a kind of rotor structure for permanent magnet motor, it includes rotor core, the outer edge of rotor core is formed by connecting by 2p identical curved surfaces along the circumferencial direction of rotor core, and curved surface is connected in sequence along the circumferencial direction of rotor core and in a symmetrical by multi-section circular arc portion or multi-section circular arc portion and multistage line segment portion；Wherein, p is the positive integer more than or equal to 1；Advantage be its using more regulated variables with the waveform of accurate optimization air gap flux density, so that the waveform of air gap flux density approaches sine wave, and then it can significantly weaken cogging torque and Cymbidium aloifolium, reduce the electromagnetic vibration noise of magneto, the stray loss that magneto can be reduced simultaneously, improves the torque density and operational efficiency of magneto.
Description
Technical field
The present invention relates to a kind of magnetoes, more particularly, to a kind of rotor structure for permanent magnet motor.
Background technique
Further application with built-in magnet steel magneto in fields such as Industry Controls, to the tooth of such magneto
The performance indicators such as slot torque, Cymbidium aloifolium, torque density, vibration noise, dynamic response propose more stringent requirement.Because forever
The characteristics of principle of magneto, the cogging torque and bigger Cymbidium aloifolium for causing it to be not present with induction machine, however
This can bring the problems such as excessive positioning accuracy decline, vibration noise, operational efficiency decline to magneto.In general on generating
The root for stating problem is harmonic components inside magneto air gap flux density, for AC magnetoelectric machine, harmonic wave at
Point any benefit no to the operation of magneto can only be brought such as several harms set forth above, therefore designer exists
It optimizes for the waveform of air gap flux density to improve the above problem to magneto operation bring and influence.
For built-in magnet steel magneto, as shown in Figure 1, traditional design structure is generallyd use with even air gap
The rotor 9 of rounded outer edge, this rotor structure can only be close to optimize air-gap flux by adjusting the pole embrace of magneto
The waveform of degree can not effectively weaken the low-order harmonic in air gap flux density since adjustable variable is single, and air-gap flux is close
The sine degree of degree is poor (referring to fig. 2), therefore is difficult significantly to weaken cogging torque and Cymbidium aloifolium.Based on the above reasons, anxious
The rotor profile structure for needing one kind novel improves and is brought by it effectively further to optimize the waveform of air gap flux density
Various magneto degradations the problem of.
China's bulletin utility model patent " a kind of rotor punching and its magneto of application " (notification number:
CN204858787U), a kind of rotor outer circle eccentric structure is proposed to optimize the waveform of air gap flux density, is rushed in rotor
It is provided with axis hole among piece, is provided at outer rim in rotor punching several for installing the mounting groove of permanent magnet, rotor punching
The outer rim of piece is formed by several segments circular sliding slopes, and the center of axis hole is deviateed in the center of circle of circular arc, and structure is simple, so that in rotor
Non-homogeneous air gap is formed between stator, to be effectively improved back emf waveform, while reducing cogging torque.But it is practical
The every pole of outer rim of its upper rotor is only made of one section of circular arc, therefore only one variable is used to adjust the outer rim shape of rotor, excellent
Change more single, it is difficult to obtain the waveform of very sinusoidal air gap flux density to take into account multiple performance indicators.
Chinese invention disclosed patent application " motor " (publication number: CN107017750A) proposes a kind of by every pole
Magnetic slot is divided into three sections in the method for the waveform for optimizing air gap flux density comprising: stator structure, including stator core and fixed
Sub- cavity is provided with stator slot on stator core, and stator slot is obliquely installed along the axis direction of stator core, stator structure around
Group is arranged on stator core using star connection；Rotor structure is arranged in stator cavity, on each magnetic pole of rotor structure
Magnet steel there are three being respectively provided with, can be modulated to sine wave for the back-emf of motor.But the manufacturing man-hours of motor is increased, and
Leakage field is larger, and electric efficiency reduces.
Chinese invention disclosed patent application " the empty slot rotor of built-in permanent magnetic motor " (publication number:
CN105099026A), a kind of method of rotor surface recessing weakening cogging torque is proposed, is uniformly divided on rotor punching
Be furnished with even number axially through magnetic slot, magnet steel is embedded in each magnetic slot respectively, each magnet steel, every setting, is turned by the pole N S interpolar
The sub- each rotor pole of iron core is respectively equipped at least two grooves at punching outer circle position, plays and changes cogging torque and torque
The effect of pulsation.But cannot effectively weaken the low-order harmonic in air gap flux density, and stator harmonic loss still compared with
Greatly.
China bulletin patent of invention " a kind of oblique pole rotor structure of permanent magnet synchronous motor " (notification number:
CN102916512A), a kind of oblique pole rotor structure is proposed to weaken cogging torque, and magnet steel unevenly divides along rotor circumference
Cloth, but this can be such that air-gap field is unevenly distributed, and bring bigger electromagnetic vibration noise.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of rotor structure for permanent magnet motor, adjust using more
Variable is with the waveform of accurate optimization air gap flux density, so that the waveform of air gap flux density approaches sine wave, and then can be big
Weaken cogging torque and Cymbidium aloifolium to amplitude, reduces the electromagnetic vibration noise of magneto, while magneto can be reduced
Stray loss, improve the torque density and operational efficiency of magneto.
The technical scheme of the invention to solve the technical problem is: a kind of rotor structure for permanent magnet motor, including turn
Sub- iron core, it is characterised in that: the outer edge of the rotor core is by 2p identical curved surfaces along the circle of the rotor core
Circumferential direction is formed by connecting, and the curved surface is by multi-section circular arc portion or multi-section circular arc portion and multistage line segment portion along the rotor core
Circumferencial direction and be connected in sequence in a symmetrical；Wherein, p is the positive integer more than or equal to 1.
The curved surface by centered on one section of first arc sections, be symmetrically distributed in the two sides of first arc sections
Second arc sections, be symmetrically distributed in two sections described in the third arc sections in outside of the second arc sections be formed by connecting, described
The center of circle of circle is outer in the minimum of the rotor core where the center of circle of circle where one arc sections and second arc sections
It connects in circle, the center of circle of circle is outside the minimum circumscribed circle of the rotor core where the third arc sections；Described first
The center of circle of circle is located on the symmetry axis of first arc sections where arc sections, the radius of circle where first arc sections
For R1, R1=κ1×R0, the center of circle of the minimum circumscribed circle in the center of circle and rotor core of circle where first arc sections
The distance between be d, d=R0-R1, the central angle of first arc sections is α1,Second circular arc
The interior point of contact of circle and institute where circle where the center of circle of circle where portion is located at first arc sections and second arc sections
Where the first arc sections stated on the line in the center of circle of circle, the radius of circle where second arc sections is R2, R2=κ2×
R1, the central angle of second arc sections is α2,The center of circle of circle is located at institute where the third arc sections
Circle where the interior point of contact of circle where round and described third arc sections where the second arc sections stated and second arc sections
The center of circle line extended line on, the radius of circle is R where the described third arc sections3, 1≤R3≤5；Wherein, κ1To be
Number, 0.65≤κ1≤ 0.75, R0Indicate the radius of the minimum circumscribed circle of the rotor core, ω1For coefficient, 0.5≤ω1≤
0.6, κ2For coefficient, 0.45≤κ2≤ 0.55, ω2For coefficient, 0.15≤ω2≤ 0.2, R0、R1、d、R2、R3Unit be milli
Rice, α1And α2Unit degree of being.
The curved surface by centered on one section of first arc sections, be symmetrically distributed in the two sides of first arc sections
Second arc sections, be symmetrically distributed in two sections described in the line segment portions in outside of the second arc sections be formed by connecting, first circle
The center of circle of circle is in the minimum circumscribed circle of the rotor core where the center of circle of circle where arc portion and second arc sections
It is interior；The center of circle of circle is located on the symmetry axis of first arc sections where first arc sections, first circular arc
The radius of circle where portion is R1, R1=κ1×R0, the center of circle of circle and the rotor core where first arc sections are most
The distance between center of circle of small circumscribed circle is d, d=R0-R1, the central angle of first arc sections is α1,
Where circle where the center of circle of circle where second arc sections is located at first arc sections and second arc sections
Where round interior point of contact and first arc sections on the line in the center of circle of circle, the radius of circle where second arc sections
For R2, R2=κ2×R1, the central angle of second arc sections is α2,The line segment portion and described
The side of part rotor iron core where curved surface is vertical；Wherein, κ1For coefficient, 0.65≤κ1≤ 0.75, R0Indicate the rotor
The radius of the minimum circumscribed circle of iron core, ω1For coefficient, 0.5≤ω1≤ 0.6, κ2For coefficient, 0.45≤κ2≤ 0.55, ω2To be
Number, 0.15≤ω2≤ 0.2, R0、R1、d、R2Unit be millimeter, α1And α2Unit degree of being.
The pole 2p magnetic slot is along the circumferential direction uniformly provided on the rotor core, every extremely described magnetic slot is by several
A axial magnetic steel tank is constituted, and is equipped with magnet steel in the axial magnetic steel tank.
Curved surface described in every extremely described magnetic slot is one corresponding, every extremely described magnetic slot axial magnetic as described in one
Steel tank is constituted, and the symmetry axis of the axial magnetic steel tank is symmetrical with first arc sections in the corresponding curved surface
Overlapping of axles.
Curved surface described in every extremely described magnetic slot is one corresponding, every extremely described magnetic slot axial magnetic as described in two
Steel tank is constituted, and the bilateral symmetry of axial magnetic steel tank described in two is distributed, and the angle of axial magnetic steel tank described in two is 180 degree,
The symmetry axis weight of the symmetry axis of axial magnetic steel tank described in two and first arc sections in the corresponding curved surface
It closes.
Curved surface described in every extremely described magnetic slot is one corresponding, every extremely described magnetic slot axial magnetic as described in two
Steel tank is constituted, and the bilateral symmetry of axial magnetic steel tank described in two is distributed, and the angle of axial magnetic steel tank described in two is greater than 90
Spend and be less than 180 degree, the symmetry axis of axial magnetic steel tank described in two and first circle in the corresponding curved surface
The symmetrical overlapping of axles of arc portion.
Every extremely described magnetic slot axial magnetic steel tank described in one is constituted, and the 2p axial magnetic steel tanks are with described
Rotor core center centered on be radially distributed, the connection of curved surface described in the axial magnetic steel tank and two
Place corresponds to.
The rotor core is that solid magnetizer or the rotor core are led by multi-disc with the punching press of same shape
Magnetic links are overrided to form along axial direction.
Compared with the prior art, the advantages of the present invention are as follows:
2p identical curved surfaces connect to the outer edge to form rotor core along the circumferencial direction of rotor core, and curved surface by
Multi-section circular arc portion or multi-section circular arc portion and multistage line segment portion along rotor core circumferencial direction and in a symmetrical be sequentially connected and
At this rotor structure can be using more regulated variables with the waveform of accurate optimization air gap flux density, so that air-gap flux
The waveform of density approaches sine wave, and then can significantly weaken cogging torque and Cymbidium aloifolium, reduces the electricity of magneto
Magnetic vibration noise, while the stray loss of magneto can be reduced, improve the torque density and operational efficiency of magneto.
Detailed description of the invention
Fig. 1 is the floor map of the rotor structure of existing built-in magnet steel magneto；
Fig. 2 is the waveform diagram of the air gap flux density of existing built-in magnet steel magneto；
Fig. 3 is the schematic perspective view of the rotor structure for permanent magnet motor of embodiment one；
Fig. 4 is the floor map of the part-structure of the rotor structure for permanent magnet motor of embodiment one；
Fig. 5 is the waveform diagram using the air gap flux density of the magneto of the rotor structure for permanent magnet motor of embodiment one；
Fig. 6 is the air gap flux density of existing built-in magnet steel magneto and is turned using the magneto of embodiment one
The analysis comparison diagram of harmonic wave in the air gap flux density of the magneto of minor structure；
Fig. 7 is the cogging torque of existing built-in magnet steel magneto and the permanent magnet machine rotor knot using embodiment one
The comparison of wave shape figure of the cogging torque of the magneto of structure；
Fig. 8 is the floor map of the part-structure of the rotor structure for permanent magnet motor of embodiment two；
Fig. 9 is the floor map of the part-structure of the rotor structure for permanent magnet motor of embodiment three；
Figure 10 is the floor map of the part-structure of the rotor structure for permanent magnet motor of example IV；
Figure 11 is the floor map of the part-structure of the rotor structure for permanent magnet motor of embodiment five.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
Embodiment one:
A kind of rotor structure for permanent magnet motor that the present embodiment proposes, as shown in Figure 3 and Figure 4 comprising rotor core 1 turns
The outer edge 11 of sub- iron core 1 is formed by connecting by 2p identical curved surfaces 12 along the circumferencial direction of rotor core 1, and curved surface 12 is by 5 sections
Arc sections along rotor core 1 circumferencial direction and be connected in sequence in a symmetrical；Wherein, p is just whole more than or equal to 1
Number, takes p=4, i.e. 2p=8 in the present embodiment.
In the present embodiment, as shown in figure 4, curved surface 12 by centered on one section of first arc sections 121, be symmetrically distributed in
Second arc sections 122 of the two sides of one arc sections 121, be symmetrically distributed in two section of second arc sections 122 outside third circular arc
Portion 123 is formed by connecting, the center of circle O of circle where the first arc sections 1211With the center of circle O of circle where the second arc sections 1222In rotor
In the minimum circumscribed circle 2 of iron core 1, the center of circle (not shown) of circle where third arc sections 123 is outer in the minimum of rotor core 1
It connects outside circle 2；The center of circle O of circle where first arc sections 1211On the symmetry axis X of the first arc sections 121, the first arc sections 121
The radius of place circle is R1, R1=κ1×R0, the center of circle O of circle where the first arc sections 1211With the minimum circumscribed circle 2 of rotor core 1
Center of circle O0The distance between be d, d=R0-R1, the central angle of the first arc sections 121 is α1,Second arc sections
The center of circle O of circle where 1222The interior point of contact of circle where round and the second arc sections 122 where the first arc sections 121 and the first circle
The center of circle O of circle where arc portion 1211Line on, i.e., the second arc sections 122 for the left side of the first arc sections 121, where circle
Center of circle O2The circle of circle where the interior point of contact A' and the first arc sections 121 of circle and its place circle where the first arc sections 121
Heart O1Line on, for second arc sections 122 on the right side of the first arc sections 121, where circle center of circle O2Positioned at the first circular arc
The center of circle O of circle where circle where portion 121 and the interior point of contact A of circle where it and the first arc sections 1211Line on, the second circular arc
The radius of circle where portion 122 is R2, R2=κ2×R1, the central angle of the second arc sections 122 is α2,Third circle
The interior point of contact and second of circle where round and third arc sections 123 where the center of circle of circle where arc portion 123 is located at the second arc sections 122
Where arc sections 122 on the extended line of the line in the center of circle of circle, i.e., third arc sections 123 for the left side of the second arc sections 122,
Where circle where the center of circle of circle where it is located at the second arc sections 122 and the interior point of contact B' of circle where it and the second arc sections 122
Round center of circle O2Line extended line on, for the third arc sections 123 on the right side of the second arc sections 122, where circle circle
The center of circle O of circle where circle where the heart is located at the second arc sections 122 and the interior point of contact B of circle where it and the second arc sections 1222Company
On the extended line of line, the radius of circle where third arc sections 123 is R3, 1≤R3≤5；Wherein, κ1For coefficient, 0.65≤κ1≤
0.75, R0Indicate the radius of the minimum circumscribed circle 2 of rotor core 1, ω1For coefficient, 0.5≤ω1≤ 0.6, κ2For coefficient, 0.45
≤κ2≤ 0.55, ω2For coefficient, 0.15≤ω2≤ 0.2, R0、R1、d、R2、R3Unit be millimeter, α1And α2Unit be
Degree.
In the present embodiment, the pole 2p (2p=8) magnetic slot, every pole magnetic are along the circumferential direction uniformly provided on rotor core 1
Steel tank corresponds to a curved surface 12, and every pole magnetic slot is made of an axial magnetic steel tank 3, the symmetry axis of axial magnetic steel tank 3 with it is corresponding
Curved surface 12 in the symmetry axis X of the first arc sections 121 be overlapped, magnet steel 4 is installed in axial magnetic steel tank 3.
In the present embodiment, rotor core 1 is made of solid permeability magnetic material, as solid magnetizer.
Fig. 5 gives the waveform of the air gap flux density of the magneto of the rotor structure for permanent magnet motor using the present embodiment
Figure, comparison diagram 2 and Fig. 5, it can be seen that the sine degree of the air gap flux density of existing built-in magnet steel magneto is poor,
And the waveform of the air gap flux density of the magneto of the rotor structure for permanent magnet motor of the present embodiment is used to have been approached standard just
String wave.Fig. 6 gives the air gap flux density of existing built-in magnet steel magneto and the magneto using the present embodiment
The analysis comparison diagram of harmonic wave in the air gap flux density of the magneto of rotor structure, from fig. 6 it can be seen that using this reality
The rotor structure for permanent magnet motor for applying example can be such that each secondary flux density harmonic amplitude reduces, so that the sine degree of air gap flux density is more preferable.
Fig. 7 gives the cogging torque of existing built-in magnet steel magneto and uses the rotor structure for permanent magnet motor of the present embodiment
The comparison of wave shape figure of the cogging torque of magneto, it can be seen from figure 7 that using the rotor structure for permanent magnet motor of the present embodiment
Cogging torque can be made to be greatly reduced.
Embodiment two:
A kind of rotor structure for permanent magnet motor that the present embodiment proposes, as shown in Figure 8 comprising rotor core 1, rotor core
1 outer edge 11 is formed by connecting by 2p identical curved surfaces 12 along the circumferencial direction of rotor core 1, and curved surface 12 is by 3 sections of arc sections
It is connected in sequence along the circumferencial direction of rotor core 1 and in a symmetrical with 2 sections of line segment portions；Wherein, p is more than or equal to 1
Positive integer, take p=4, i.e. 2p=8 in the present embodiment.
In the present embodiment, as shown in figure 8, curved surface 12 by centered on one section of first arc sections 121, be symmetrically distributed in
Second arc sections 122 of the two sides of one arc sections 121, be symmetrically distributed in two section of second arc sections 122 outside line segment portion 124
It is formed by connecting, the center of circle O of circle where the first arc sections 1211With the center of circle O of circle where the second arc sections 1222In rotor core 1
Minimum circumscribed circle 2 in；The center of circle O of circle where first arc sections 1211On the symmetry axis X of the first arc sections 121, first
The radius of circle where arc sections 121 is R1, R1=κ1×R0, the center of circle O of circle where the first arc sections 1211Most with rotor core 1
The center of circle O of small circumscribed circle 20The distance between be d, d=R0-R1, the central angle of the first arc sections 121 is α1,
The center of circle O of circle where second arc sections 1222The inscribe of circle where round and the second arc sections 122 where the first arc sections 121
The center of circle O of point and circle where the first arc sections 1211Line on, i.e., the second arc sections for the left side of the first arc sections 121
122, the center of circle O of place circle2The interior point of contact A' and the first arc sections of circle and circle where it where the first arc sections 121
The center of circle O of circle where 1211Line on, for second arc sections 122 on the right side of the first arc sections 121, where circle the center of circle
O2The center of circle O of circle where the interior point of contact A and the first arc sections 121 of circle and its place circle where the first arc sections 1211Company
On line, the radius of circle where the second arc sections 122 is R2, R2=κ2×R1, the central angle of the second arc sections 122 is α2,Line segment portion 124 is vertical with the side 13 of part rotor iron core 1 where curved surface 12；Wherein, κ1For coefficient,
0.65≤κ1≤ 0.75, R0Indicate the radius of the minimum circumscribed circle 2 of rotor core 1, ω1For coefficient, 0.5≤ω1≤ 0.6, κ2For
Coefficient, 0.45≤κ2≤ 0.55, ω2For coefficient, 0.15≤ω2≤ 0.2, R0、R1、d、R2Unit be millimeter, α1And α2List
Position degree of being.
The rest part structure of the rotor structure for permanent magnet motor of the present embodiment and the rotor structure for permanent magnet motor of embodiment one
Rest part structure it is identical.
Two sections of third arc sections 123 that two sections of line segment portions 124 are substituted in embodiment one have been used in the present embodiment, so that
The structure of curved surface 12 is more simple.
Embodiment three:
A kind of rotor structure for permanent magnet motor that the present embodiment proposes, the rotor structure for permanent magnet motor of structure and embodiment one
Structure it is essentially identical, in the design and layout that the difference is that only every pole magnetic slot, as shown in figure 9, in the present embodiment,
The pole 2p (2p=8) magnetic slot is along the circumferential direction uniformly provided on rotor core 1, every pole magnetic slot corresponds to a curved surface 12, often
Pole magnetic slot is made of two axial magnetic steel tanks 3, and two axial magnetic steel tanks 3 are symmetrically distributed, the folder of two axial magnetic steel tanks 3
Angle is 180 degree, and the symmetry axis of two axial magnetic steel tanks 3 is heavy with the symmetry axis X of the first arc sections 121 in corresponding curved surface 12
It closes, magnet steel 4 is installed in axial magnetic steel tank 3.
Example IV:
A kind of rotor structure for permanent magnet motor that the present embodiment proposes, the rotor structure for permanent magnet motor of structure and embodiment one
Structure it is essentially identical, in the design and layout that the difference is that only every pole magnetic slot, as shown in Figure 10, in the present embodiment
In, the pole 2p (2p=8) magnetic slot is along the circumferential direction uniformly provided on rotor core 1, every pole magnetic slot corresponds to a curved surface 12,
Every pole magnetic slot is made of two axial magnetic steel tanks 3, and two axial magnetic steel tanks 3 are symmetrically distributed, two axial magnetic steel tanks 3
Angle is greater than 90 degree and to be less than 180 degree, the symmetry axis of two axial magnetic steel tanks 3 and the first arc sections in corresponding curved surface 12
121 symmetry axis X is overlapped, and is equipped with magnet steel 4 in axial magnetic steel tank 3.
Embodiment five:
A kind of rotor structure for permanent magnet motor that the present embodiment proposes, the rotor structure for permanent magnet motor of structure and embodiment one
Structure it is essentially identical, in the design and layout that the difference is that only every pole magnetic slot, as shown in figure 11, in the present embodiment
In, the pole 2p (2p=8) magnetic slot is along the circumferential direction uniformly provided on rotor core 1, every pole magnetic slot is by an axial magnetic steel
Slot 3 is constituted, and 2p axial magnetic steel tank 3 be radially distributed centered on the center of rotor core 1, each axial magnetic steel tank 3 and
The junction of two curved surfaces 12 is corresponding, is equipped with magnet steel 4 in axial magnetic steel tank 3.
Rotor core 1 in above-mentioned each embodiment can also be had the punching press magnetic conduction steel disc of same shape along axial by multi-disc
It is overrided to form.
Claims (9)
1. a kind of rotor structure for permanent magnet motor, including rotor core, it is characterised in that: the outer edge of the rotor core is by 2p
A identical curved surface is formed by connecting along the circumferencial direction of the rotor core, and the curved surface is by multi-section circular arc portion or multistage circle
Arc portion and multistage line segment portion along the rotor core circumferencial direction and be connected in sequence in a symmetrical；Wherein, p is big
In or equal to 1 positive integer.
2. a kind of rotor structure for permanent magnet motor according to claim 1, it is characterised in that: the curved surface is by with one section
Centered on one arc sections, be symmetrically distributed in first arc sections two sides the second arc sections, be symmetrically distributed in two sections of institutes
The third arc sections in the outside for the second arc sections stated are formed by connecting, the center of circle of circle where first arc sections and described
The center of circle of circle where second arc sections is in the minimum circumscribed circle of the rotor core, circle where the third arc sections
The center of circle outside the minimum circumscribed circle of the rotor core；The center of circle of circle where first arc sections is located at described the
On the symmetry axis of one arc sections, the radius of circle where first arc sections is R1, R1=κ1×R0, first circular arc
The distance between the center of circle of circle and the center of circle of minimum circumscribed circle of rotor core where portion are d, d=R0-R1, described
The central angle of first arc sections is α1,The center of circle of circle is located at described first where second arc sections
The center of circle of circle where the interior point of contact of circle where the second round and described arc sections where arc sections and first arc sections
On line, the radius of circle where second arc sections is R2, R2=κ2×R1, the central angle of second arc sections is
α2,It is round and described that the center of circle of circle where the third arc sections is located at the second arc sections place
It is described where the interior point of contact of circle where third arc sections and second arc sections on the extended line of the line in the center of circle of circle
The radius of circle where third arc sections is R3, 1≤R3≤5；Wherein, κ1For coefficient, 0.65≤κ1≤ 0.75, R0It indicates described to turn
The radius of the minimum circumscribed circle of sub- iron core, ω1For coefficient, 0.5≤ω1≤ 0.6, κ2For coefficient, 0.45≤κ2≤ 0.55, ω2For
Coefficient, 0.15≤ω2≤ 0.2, R0、R1、d、R2、R3Unit be millimeter, α1And α2Unit degree of being.
3. a kind of rotor structure for permanent magnet motor according to claim 1, it is characterised in that: the curved surface is by with one section
Centered on one arc sections, be symmetrically distributed in first arc sections two sides the second arc sections, be symmetrically distributed in two sections of institutes
The line segment portion in the outside for the second arc sections stated is formed by connecting, the center of circle and described second of circle where first arc sections
The center of circle of circle is in the minimum circumscribed circle of the rotor core where arc sections；The circle of circle where first arc sections
The heart is located on the symmetry axis of first arc sections, and the radius of circle where first arc sections is R1, R1=κ1×R0,
The distance between the center of circle of circle and the center of circle of minimum circumscribed circle of rotor core where first arc sections are d, d
=R0-R1, the central angle of first arc sections is α1,The center of circle of circle where second arc sections
The interior point of contact of circle and first arc sections where the second round and described arc sections where first arc sections
On the line in the center of circle of place circle, the radius of circle where second arc sections is R2, R2=κ2×R1, described second circle
The central angle of arc portion is α2,The side of part rotor iron core where the line segment portion and the curved surface
Vertically；Wherein, κ1For coefficient, 0.65≤κ1≤ 0.75, R0Indicate the radius of the minimum circumscribed circle of the rotor core, ω1For
Coefficient, 0.5≤ω1≤ 0.6, κ2For coefficient, 0.45≤κ2≤ 0.55, ω2For coefficient, 0.15≤ω2≤ 0.2, R0、R1、d、R2's
Unit is millimeter, α1And α2Unit degree of being.
4. a kind of rotor structure for permanent magnet motor according to claim 2 or 3, it is characterised in that: on the rotor core
It is along the circumferential direction uniformly provided with the pole 2p magnetic slot, every extremely described magnetic slot is made of several axial magnetic steel tanks, described
Magnet steel is installed in axial magnetic steel tank.
5. a kind of rotor structure for permanent magnet motor according to claim 4, it is characterised in that: every extremely described magnetic slot is corresponding
Curved surface described in one, every extremely described magnetic slot axial magnetic steel tank described in one are constituted, the axial magnetic steel tank
The symmetrical overlapping of axles of symmetry axis and first arc sections in the corresponding curved surface.
6. a kind of rotor structure for permanent magnet motor according to claim 4, it is characterised in that: every extremely described magnetic slot is corresponding
Curved surface described in one, every extremely described magnetic slot axial magnetic steel tank described in two are constituted, axial magnetic steel described in two
Slot bilateral symmetry is distributed, and the angle of axial magnetic steel tank described in two is 180 degree, the symmetry axis of axial magnetic steel tank described in two
With the symmetrical overlapping of axles of first arc sections in the corresponding curved surface.
7. a kind of rotor structure for permanent magnet motor according to claim 4, it is characterised in that: every extremely described magnetic slot is corresponding
Curved surface described in one, every extremely described magnetic slot axial magnetic steel tank described in two are constituted, axial magnetic steel described in two
Slot bilateral symmetry is distributed, and the angle of axial magnetic steel tank described in two is greater than 90 degree and to be less than 180 degree, axial direction described in two
The symmetrical overlapping of axles of the symmetry axis of magnetic slot and first arc sections in the corresponding curved surface.
8. a kind of rotor structure for permanent magnet motor according to claim 4, it is characterised in that: every extremely described magnetic slot is by one
A axial magnetic steel tank is constituted, and the 2p axial magnetic steel tanks are centered on the center of the rotor core in radiation
Shape distribution, each axial magnetic steel tank are corresponding with the junction of curved surface described in two.
9. a kind of rotor structure for permanent magnet motor according to claim 2 or 3, it is characterised in that: the rotor core is
Solid magnetizer or the rotor core are overrided to form with the punching press magnetic conduction steel disc of same shape along axial direction by multi-disc.
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| CN110768425A (en) * | 2019-10-31 | 2020-02-07 | 珠海凌达压缩机有限公司 | A motor based on a rotor round edge design and an electrical appliance using the same |
| CN112271841A (en) * | 2020-11-12 | 2021-01-26 | 重庆新颜达机电设备有限公司 | Permanent magnet alternating current generator rotor |
| CN112733871A (en) * | 2020-05-23 | 2021-04-30 | 无锡畅云网络有限公司 | Multi-dimensional anomaly detection model based on spatial density |
| CN112968580A (en) * | 2021-02-03 | 2021-06-15 | 大连理工大学 | Rotor structure of built-in permanent magnet synchronous motor and design method |
| CN113162270A (en) * | 2020-12-30 | 2021-07-23 | 宁波安信数控技术有限公司 | Rotor structure of built-in permanent magnet motor |
| CN113381536A (en) * | 2020-03-10 | 2021-09-10 | 广东威灵电机制造有限公司 | Permanent magnet, rotor assembly, motor and electrical equipment |
| CN115776185A (en) * | 2022-10-17 | 2023-03-10 | 珠海凌达压缩机有限公司 | Rotor core, motor and compressor |
| CN115864698A (en) * | 2021-09-24 | 2023-03-28 | 瑞智精密股份有限公司 | Rotor and motor |
| CN115912839A (en) * | 2022-10-27 | 2023-04-04 | 索恩格汽车电动系统有限公司 | A permanent magnet synchronous motor |
| DE102022115984A1 (en) | 2022-06-27 | 2023-12-28 | Hiwin Mikrosystem Corp. | Improved structure of a high frequency rotation mechanism |
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| US12051942B2 (en) | 2022-08-03 | 2024-07-30 | Hiwin Mikrosystem Corp. | Structure of high-frequency rotary mechanism |
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