CN208015471U - Rotor structure, permanent magnetism assist in synchronization reluctance motor and electric vehicle - Google Patents
Rotor structure, permanent magnetism assist in synchronization reluctance motor and electric vehicle Download PDFInfo
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- CN208015471U CN208015471U CN201820369018.2U CN201820369018U CN208015471U CN 208015471 U CN208015471 U CN 208015471U CN 201820369018 U CN201820369018 U CN 201820369018U CN 208015471 U CN208015471 U CN 208015471U
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Abstract
The utility model provides a kind of rotor structure, permanent magnetism assist in synchronization reluctance motor and electric vehicle.Rotor structure includes rotor body, and magnetic slot group is provided on rotor body, and magnetic slot group includes outer layer magnetic slot, and outer layer magnetic slot includes：First outer layer magnetic slot section；Second outer layer magnetic slot section, first outer layer magnetic slot section and the second outer layer magnetic slot section are oppositely disposed along the radial direction of rotor body, and the geometric center lines of the length direction of the first outer layer magnetic slot section and the extended line of the geometric center lines of the length direction of the second outer layer magnetic slot section have the first angle；First folding slot, the first folding slot are connected with the first outer layer magnetic slot section；Second folding slot, the second folding slot are connected with the second outer layer magnetic slot section, and there is the extended line of the geometric center lines of the length direction of the first folding slot and the geometric center lines of the length direction of the second folding slot the second angle, the second angle to be more than the first angle.Setting improves the integrally anti-demagnetization capability of the motor with the rotor structure in this way.
Description
Technical field
The utility model is related to motor device technical fields, in particular to a kind of rotor structure, permanent magnetism assist in synchronization
Reluctance motor and electric vehicle.
Background technology
In the prior art, by being respectively formed sky between the both ends of magnet storage tank and two ends of the permanent magnet
Between, to promote the anti-demagnetization capability of rotor.The polar arc range for only giving magnet steel in the prior art gives the space of folding slot
Range.In the prior art also the end of permanent magnet be arranged magnet isolation tank, and provide magnet isolation tank and permanent magnet angle and V-type forever
Angle between magnet.However, its magnet isolation tank is drawn close relative to the extended line of magnet steel to pole center line, it is unfavorable for permanent-magnet magnetic
The increase of chain.Secondly, two V-types magnet steel angulation in the prior art is 130 °~160 °, can when number of poles is less than 6
To realize well, and when number of poles is more, when such as 12, each extremely shared angle only has 30 degree, still keeps the angle of two V-type magnet steel
Degree is so big, only the dosage of permanent magnet can be made drastically to decline, to influence the output of motor.
It gives and is designed using U-shaped or V-structure permanent-magnet magnetic resistance rotor anti-demagnetization in the prior art, main technical point
It is：The magnet isolation tank of rotor magnetic steel end is subjected to trimming processing.Permanent magnet also carries out trimming processing simultaneously.It defines preferably
Corner cut range.However, the corner cut both sides lenth ratio and corner cut range of its restriction, it is understood that there may be a kind of situation, i.e. magnet steel are very
It is thin, in the case of corner cut is prodigious, the end of magnet steel is directly cut to a wedge angle.The anti-demagnetization capability of magnet steel has with magnet thickness
Much relations, after magnet thickness is cut into the shape, the reduction of the thickness on magnetizing direction may cause demagnetization serious.
Certain rotor magnetic steels are composed of multi-disc, and under the action of demagnetized field, certain demagnetization rates are very big, such as super
Cross 20%, and certain with regard to very little, is less than 3%.Usually, it is most weak to depend on the anti-demagnetization of monolithic for whole anti-demagnetization capability
Magnet steel.Therefore, using motor in the prior art, there are unreasonable structure, diamagnetic the problems such as moving back energy force difference.
Utility model content
The main purpose of the utility model is to provide a kind of rotor structure, permanent magnetism assist in synchronization reluctance motor and electronic vapour
Vehicle, to solve the problems, such as that diamagnetic move back of motor in the prior art can force difference.
To achieve the goals above, one side according to the present utility model provides a kind of rotor structure, including：Turn
Sub- ontology is provided with magnetic slot group on rotor body, and magnetic slot group includes outer layer magnetic slot, and outer layer magnetic slot includes：Outside first
Layer magnetic slot section；The diameter of second outer layer magnetic slot section, the first outer layer magnetic slot section and the second outer layer magnetic slot section along rotor body
It is oppositely disposed to direction, the length of the geometric center lines of the length direction of the first outer layer magnetic slot section and the second outer layer magnetic slot section
The extended line for spending the geometric center lines in direction has the first angle；First folding slot, the first folding slot and the first outer layer magnetic slot section phase
Connection；Second folding slot, the second folding slot are connected with the second outer layer magnetic slot section, the geometric center lines of the length direction of the first folding slot
There is the second angle with the extended line of the geometric center lines of the length direction of the second folding slot, wherein the second angle is more than the first folder
Angle.
Further, the shaft hole of the first end of the first outer layer magnetic slot section towards rotor body is extended, outside first
The outer edge of the second end of layer magnetic slot section towards rotor body is extended, and the first end direction of the second outer layer magnetic slot section turns
Axis hole is extended, and the outer edge of second end towards the rotor body of the second outer layer magnetic slot section is arranged.
Further, the first folding slot and the second folding slot are located at the both sides of the d-axis of rotor body, and the of the first folding slot
One end is connected with the second end of the first outer layer magnetic slot section, and the outer edge of second end towards the rotor body of the first folding slot extends
And it is gradually distance from d-axis setting, the first end of the second folding slot is connected with the second end of the second outer layer magnetic slot section, the second folding slot
Second end towards rotor body outer edge extend and be gradually distance from d-axis setting.
Further, the width of the second end of the first folding slot is less than the width of first end and/or the second end of the second folding slot
Width be less than first end width.
Further, the first end of the second outer layer magnetic slot section and the first end of the first outer layer magnetic slot section are oppositely disposed
To form v-shaped structure, alternatively, the first end of the second outer layer magnetic slot section be connected with the first end of the first outer layer magnetic slot section with
U-shaped structure.
Further, magnetic slot group further includes：Internal layer magnetic slot, outer layer magnetic slot are disposed adjacently with internal layer magnetic slot,
Magnetic conduction channel is formed between outer layer magnetic slot and internal layer magnetic slot, internal layer magnetic slot includes the first internal layer magnetic slot set gradually
Section, the second internal layer magnetic slot section and third internal layer magnetic slot section, the first internal layer magnetic slot section, the second internal layer magnetic slot section and third
Internal layer magnetic slot section is sequentially communicated to form U-shaped structure of the opening towards the outer edge of rotor body, alternatively, the first internal layer magnet steel
Slot section, the second internal layer magnetic slot section and third internal layer magnetic slot section are positioned apart from successively, the first internal layer magnetic slot section, in second
In layer magnetic slot section and third internal layer magnetic slot section magnetic bridge is formed between adjacent two.
Further, the first internal layer magnetic slot section includes third folding slot, and third rolls over the first end and the first internal layer magnet steel of slot
The end of the outer edge of the close rotor body of slot section is connected, and the outer edge of second end towards the rotor body of third folding slot prolongs
Stretch and be gradually distance from the d-axis of rotor body；Third internal layer magnetic slot section includes four fold slot, the first end of four fold slot and the
The end of the outer edge of the close rotor body of three internal layer magnetic slot sections is connected, and the second end of four fold slot is towards rotor body
Outer edge extend and be gradually distance from d-axis.
Further, 0.3 × Wm1<Lt1/k1<0.7 × Wm1, wherein Wm1 is outside the first outer layer magnetic slot section or second
The width of layer magnetic slot section；Lt1 formed between the first folding slot or the cell wall and the outer edge of rotor body of the second folding slot every
The length of magnetic bridge；K 1 is the first perunit value.
Further, 0.1 × Wm2<Lt2/k2<0.35 × Wm2, wherein Wm2 is in the first internal layer magnetic slot section or third
The width of layer magnetic slot section；Lt2 be third roll over formed between the cell wall and the outer edge of rotor body of slot or four fold slot every
The length of magnetic bridge；K 2 is the second perunit value.
Further, 0.6<Lt1/(Lt1/k1+Lt2/k2)<0.9.
Further, Wm1/Wm2=a × (Lt1/k1/Lt2/k)+b × (L1/L2), wherein a be rotor structure on every
The weight of the lenth ratio of magnetic bridge；B is the weight of the ratio of the average length of the folding slot on rotor structure；L1 is the first folding slot
And/or second folding slot average thickness；L2 is the average thickness that third rolls over slot and/or four fold slot.
Further, a ∈ [1,2], and/or, b=1.
Further, rotor structure further includes outer layer permanent magnet and internal layer permanent magnet, and outer layer permanent magnet is set to outer layer magnetic
In steel tank, internal layer permanent magnet is set in internal layer magnetic slot.
Further, min (J1, J2) >Ns × A × Wt/4P, wherein J1 is end and the rotor body of outer layer permanent magnet
Outer edge at minimum range；J2 is the minimum range at the end of internal layer permanent magnet and the outer edge of rotor body；Ns is
The number of teeth of stator tooth；A is the shaft of the end and rotor body of the side wall for the close d-axis side that third rolls over slot and four fold slot
The polar arc angle that line between the hole heart in hole is formed；Wt is the width of stator tooth；P is the number of poles of rotor structure.
Further, magnetic slot group further includes：Third layer magnetic slot, third layer magnetic slot is adjacent to internal layer magnetic slot to be set
It sets, forms magnetic conduction channel between third layer magnetic slot and internal layer magnetic slot, third layer magnetic slot is overall U-shaped or arc.
Further, permanent magnet material is ferrite or Agglutinate neodymium-iron-boron.
Further, as Wt1 < Wt2, k1=1, k2=max (Wt1, Wt2)/min (Wt1, Wt2), alternatively, working as Wt1
When > Wt2, k2=1, k1=max (Wt1, Wt2)/min (Wt1, Wt2), wherein Wt1 is the slot of the first folding slot or the second folding slot
The width of the magnetic bridge formed between wall and the outer edge of rotor body；Wt2 is that third is rolled over the cell wall of slot or four fold slot and turned
The width of the magnetic bridge formed between the outer edge of sub- ontology.
Another aspect according to the present utility model provides a kind of permanent magnetism assist in synchronization reluctance motor, including rotor structure,
Rotor structure is above-mentioned rotor structure.
Another aspect according to the present utility model, provides a kind of electric vehicle, including rotor structure, and rotor structure is upper
State rotor mechanism.
Using the technical solution of the utility model, by the geometric center lines of the length direction of the first folding slot and the second folding slot
The second angle that the extended line of the geometric center lines of length direction is formed is set greater than the length side of the first outer layer magnetic slot section
To geometric center lines and the second outer layer magnetic slot section length direction geometric center lines the first angle for being formed of extended line
Set-up mode.In the case where ensureing that d axle inductances are basically unchanged, guiding demagnetized field is let out from the folding slot of q axis for setting in this way
Flood reduces effect of the demagnetized field to permanent magnet original magnetic field, effectively promotes the motor integrally anti-demagnetization with the rotor structure
Ability.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide a further understanding of the present invention, this practicality
Novel illustrative embodiments and their description are not constituted improper limits to the present invention for explaining the utility model.
In the accompanying drawings：
Fig. 1 shows the structural schematic diagram of the first embodiment of rotor structure according to the present utility model；
Fig. 2 shows the structural schematic diagrams of the second embodiment of rotor structure according to the present utility model；
Fig. 3 shows the structural schematic diagram of the 3rd embodiment of rotor structure according to the present utility model；
Fig. 4 shows the structural schematic diagram of the fourth embodiment of rotor structure according to the present utility model；
Fig. 5 shows the structural schematic diagram of the 5th embodiment of rotor structure according to the present utility model；
Fig. 6 shows the structural schematic diagram of the sixth embodiment of rotor structure according to the present utility model.
Wherein, above-mentioned attached drawing includes the following drawings label：
10, rotor body；13, hollow hole；14, shaft hole
11, outer layer magnetic slot；111, the first outer layer magnetic slot section；112, the second outer layer magnetic slot section；113, the first folding slot；
114, the second folding slot；
12, internal layer magnetic slot；121, the first internal layer magnetic slot section；122, the second internal layer magnetic slot section；123, third internal layer
Magnetic slot section；124, third rolls over slot；125, four fold slot；
20, outer layer permanent magnet；30, internal layer permanent magnet；
40, stator；41, stator tooth.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
It should be noted that term " first ", " second " etc. in the description and claims of this application and attached drawing
It is for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that the art used in this way
Language can be interchanged in the appropriate case, so that presently filed embodiment described herein for example can be in addition to illustrating herein
Or the sequence other than those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that
Cover it is non-exclusive include, for example, containing the process of series of steps or unit, method, system, product or equipment need not limit
In those of clearly listing step or unit, but may include not listing clearly or for these processes, method, production
The intrinsic other steps of product or equipment or unit.
For ease of description, herein can with use space relative terms, as " ... on ", " in ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, if the device in attached drawing is squeezed, it is described as " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also other different modes positioning (be rotated by 90 ° or be in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
Now, the illustrative embodiments according to the application are more fully described with reference to the accompanying drawings.However, these are exemplary
Embodiment can be implemented by many different forms, and should not be construed to be limited solely to embodiment party set forth herein
Formula.It should be understood that thesing embodiments are provided so that disclosure herein is thoroughly and complete, and these are shown
The design of example property embodiment is fully conveyed to those of ordinary skill in the art, in the accompanying drawings, for the sake of clarity, it is possible to expand
The big thickness of layer and region, and make that identical device is presented with like reference characters, thus omission retouches them
It states.
In conjunction with shown in Fig. 1 to Fig. 6, i.e., embodiment according to the present utility model provides a kind of rotor structure.
Specifically, as shown in Figure 1, the rotor structure includes rotor body 10.Magnetic slot group is provided on rotor body 10.
Magnetic slot group includes outer layer magnetic slot 11.Outer layer magnetic slot 11 includes the first outer layer magnetic slot section 111, the second outer layer magnetic slot section
112, the first folding slot 113 and the second folding slot 114.First outer layer magnetic slot section 111 and the second outer layer magnetic slot section 112 are along rotor sheet
The radial direction of body 10 is oppositely disposed.The geometric center lines of the length direction of first outer layer magnetic slot section 111 and the second outer layer
The extended line of the geometric center lines of the length direction of magnetic slot section 112 has the first angle Z.First folding slot 113 and the first outer layer
Magnetic slot section 111 is connected.Second folding slot 114 is connected with the second outer layer magnetic slot section 112, the length side of the first folding slot 113
To the extended line of geometric center lines of length direction of geometric center lines and the second folding slot 114 there is the second angle M, wherein
Second angle M is more than the first angle Z.
In the present embodiment, by the length side of the geometric center lines of the length direction of the first folding slot 113 and the second folding slot 114
To the second angles for being formed of extended line of geometric center lines be set greater than the length direction of the first outer layer magnetic slot section 111
The first angle that the extended line of geometric center lines and the geometric center lines of the length direction of the second outer layer magnetic slot section 112 is formed
Set-up mode.In the case where ensureing that d axle inductances are basically unchanged, guiding demagnetized field " is let out from the folding slot of q axis for setting in this way
Flood " reduces effect of the demagnetized field to permanent magnet original magnetic field, effectively promotes the motor integrally anti-demagnetization with the rotor structure
Ability.Flood discharge refers to：Demagnetized field is compared to the water of certain potential energy, the build-in attribute magnetic field that permanent magnet carries is compared to dike
Dam, when water potential energy accumulation to a certain extent, the intrinsic magnetism of original permanent magnet can be destroyed.And by certain rotor design,
The potential energy of flood is let out by other paths in addition to permanent magnet and is removed, demagnetization potential energy is avoided all to concentrate on permanent magnet, it can be with
Effectively promote anti-demagnetization capability.
Wherein, the first end of the first outer layer magnetic slot section 111 is extended towards shaft hole 14.First outer layer magnetic slot section
The outer edge of 111 second end towards rotor body 10 is extended.The first end of second outer layer magnetic slot section 112 is towards shaft
Hole 14 is extended.The outer edge of the second end of second outer layer magnetic slot section 112 towards rotor body 10 is arranged.First folding slot
113 and second folding slot 114 be located at rotor body 10 d-axis d both sides.The first end of first folding slot 113 and the first outer layer
The second end of magnetic slot section 111 is connected.The second end of first folding slot 113 towards rotor body 10 outer edge extend and it is gradual
It is arranged far from d-axis.The first end of second folding slot 114 is connected with the second end of the second outer layer magnetic slot section 112, the second folding slot
The outer edge of 114 second end towards rotor body 10 extends and is gradually distance from d-axis setting.Setting can be carried effectively in this way
The diamagnetic ability of moving back of the high rotor structure.
In the present embodiment, the width of the second end of the first folding slot 113 is less than the width or the second folding slot 114 of first end
Second end width be less than first end width.Certainly, both of these case can also exist simultaneously.Setting can be effective in this way
Improve the diamagnetic ability of moving back of the rotor structure in ground.
Shown in as shown in Figure 1, Figure 3 and Figure 4, the first end of the second outer layer magnetic slot section 112 and the first outer layer magnetic slot section 111
First end is connected to form v-shaped structure.As shown in Figure 2, Figure 5 and Figure 6, the first end of the second outer layer magnetic slot section 112 and the
The first end of one outer layer magnetic slot section 111 is connected to form U-shaped structure.Setting can effectively optimize rotor structure in this way
Magnetic circuit has the function that improve rotor torque.
Further, magnetic slot group further includes internal layer magnetic slot 12.Outer layer magnetic slot 11 is adjacent to internal layer magnetic slot 12
Setting forms magnetic conduction channel between outer layer magnetic slot 11 and internal layer magnetic slot 12.Internal layer magnetic slot 12 includes the set gradually
One internal layer magnetic slot section 121, the second internal layer magnetic slot section 122 and third internal layer magnetic slot section 123.First internal layer magnetic slot section
121, the second internal layer magnetic slot section 122 and third internal layer magnetic slot section 123 are sequentially communicated to form opening towards rotor body 10
Outer edge U-shaped structure, the first internal layer magnetic slot section 121, the second internal layer magnetic slot section 122 and third internal layer magnetic slot section
123 are positioned apart from successively, the first internal layer magnetic slot section 121, the second internal layer magnetic slot section 122 and third internal layer magnetic slot section
In 123 magnetic bridge is formed between adjacent two.
In order to further increase the anti-demagnetization capability of rotor structure, the first internal layer magnetic slot section 121 further includes third folding slot
124.Third rolls over the end phase of the first end and the outer edge of the close rotor body 10 of the first internal layer magnetic slot section 121 of slot 124
Connection.The outer edge of second end towards the rotor body 10 of third folding slot 124 extends and is gradually distance from the d-axis of rotor body 10.
Third internal layer magnetic slot section 123 includes four fold slot 125.The first end of four fold slot 125 and third internal layer magnetic slot section 123
It is connected close to the end of the outer edge of rotor body 10.Outer edge of the second end of four fold slot 125 towards rotor body 10
Extend and is gradually distance from d-axis.
Specifically, in order to ensure the balance of performance and anti-demagnetization capability, which meets：0.3×Wm1<Lt1/k1<
0.7 × Wm1, wherein Wm1 is the width of the first outer layer magnetic slot section 111 or the second outer layer magnetic slot section 112, and Lt1 is the first folding
The length of the magnetic bridge formed between slot 113 or the cell wall and the outer edge of rotor body 10 of the second folding slot 114.K1 is the first mark
One value.0.1×Wm2<Lt2/k2<0.35 × Wm2, wherein Wm2 is the first internal layer magnetic slot section 121 or third internal layer magnetic slot
The width of section 123, Lt2 are to be formed between third folding slot 124 or the cell wall and the outer edge of rotor body 10 of four fold slot 125
The length of magnetic bridge, K2 are the second perunit value, 0.6<Lt1/(Lt1/k1+Lt2/k2)<0.9.Wm1/Wm2=a × (Lt1/k1/
Lt2/k)+b × (L1/L2), wherein a is the weight of the lenth ratio of the magnetic bridge on rotor structure, and b is on rotor structure
Roll over the weight of the ratio of slot average length, wherein the average length of the first folding slot 113 can be by the first folding slot 113
Folding slot both ends on thickness direction take n point respectively, find out length (certainly, the company between each pair of point of line between each pair of point
Line can be the shortest distance between opposite two side walls), the ratio of the summation and n that then find out wire length acquires.L1
For the first folding slot 113 or the average thickness of the second folding slot 114, L2 is the average thickness that third rolls over slot 124 or four fold slot 125,
Wherein, L1=(L11+L12+L1n)/n, L2=(L21+L22+L2n)/n, n are taken on the close d axis side contour line to roll over slot
Point number, precision can be met when more than four.In this embodiment, it is preferred that a ∈ [1,2], b=1.
Further, rotor structure further includes outer layer permanent magnet 20 and internal layer permanent magnet 30, and outer layer permanent magnet 20 is set to
In outer layer magnetic slot 11, internal layer permanent magnet 30 is set in internal layer magnetic slot 12.To further avoid local demagnetization, with
It, can be to avoid local demagnetization, min (J1, J2) when lower relationship;Ns × A × Wt/4P, wherein J1 is the end of outer layer permanent magnet 20
With the minimum range at the outer edge of rotor body 10, J2 is at the end of internal layer permanent magnet 30 and the outer edge of rotor body 10
Minimum range, Ns be stator tooth 41 the number of teeth；A is the side wall for the close d-axis side that third rolls over slot 124 and four fold slot 125
End and the hole heart of shaft hole 14 between the polar arc angle that is formed of line, Wt is the width of stator tooth, and P is rotor structure
Number of poles.
In the present embodiment, magnetic slot group further includes third layer magnetic slot, third layer magnetic slot and 12 phase of internal layer magnetic slot
It is arranged adjacently, forms magnetic conduction channel between third layer magnetic slot and internal layer magnetic slot 12, third layer magnetic slot is overall U-shaped or arc
Shape.Permanent magnet material is ferrite or Agglutinate neodymium-iron-boron.It is provided in this way conducive to the anti-demagnetization capability of enhancing rotor structure.
As Wt1 < Wt2, k1=1, k2=max (Wt1, Wt2)/min (Wt1, Wt2), alternatively, as Wt1 > Wt2, k2
=1, k1=max (Wt1, Wt2)/min (Wt1, Wt2), wherein Wt1 be the first folding slot 113 or the second folding slot 114 cell wall with
The width of the magnetic bridge formed between the outer edge of rotor body 10；Wt2 is the cell wall that third rolls over slot 124 or four fold slot 125
The width of the magnetic bridge formed between the outer edge of rotor body 10.
Rotor structure in above-described embodiment can be also used for motor device technical field, i.e., according to the present utility model another
On the one hand, a kind of motor, including rotor structure are provided, rotor structure is the rotor structure in above-described embodiment.
Rotor structure in above-described embodiment can be also used for automotive field, i.e., another aspect according to the present utility model,
A kind of electric vehicle, including rotor structure are provided, rotor structure is the rotor structure in above-described embodiment.
In the present embodiment, magnetic slot is provided on rotor structure, magnetic slot has close to rotor outer circle one end is different from magnetic
The bending structure of steel tank major part shape.Therefore in the bending place, magnetic slot is divided to form magnet steel groove body and magnetic slot end
End folding slot, the subtended angle bigger (M> that each pole lower magnetic steel slot end is formed relative to magnetic slot main part;Z).Magnetic slot end
Width is with moving closer to rotor outer circle, width (L12, L11；L22, L21) it is also smaller and smaller, it is usually put in internal layer magnetic slot
The magnet steel for setting multi-disc slab construction is spliced into U-shaped, and outer layer is spliced into V-type or U-shaped by slab construction magnet steel.To ensure close to magnet steel
The magnet steel in the slot end regions Zhe Cao does not generate local demagnetization, and area thickness W1 is more than magnet steel other end thickness W2.Phase magnetic slot
For V-structure when, radial magnetic bridge is formed between magnetic slot, folding slot end forms tangential magnetic bridge with rotor outer edge.
Tangential magnetic bridge：Positioned at folding slot end, folding slot is the same as the tangential thin-walled between air gap.The extension direction of thin-walled is circumference
Tangentially.Radial magnetic bridge：Positioned at folding slot close to the thin-walled of circle centre position, the extension direction of thin-walled is radial.Demagnetize stability bandwidth：When applying
When adding some demagnetized field so that every magnet steel, which all demagnetizes, reaches 5% or more, at this point, the demagnetization rate of each magnet steel is counted,
It then demagnetizes demagnetization rate/(the maximum demagnetization rate-minimum demagnetization rate) of stability bandwidth=averagely.
As shown in figure 4, Wn1:Outer layer magnetic slot radial direction magnetic bridge thickness, Wn2:Internal layer magnetic slot radial direction magnetic bridge thickness,
Ln1:Outer layer magnetic slot radial direction magnetic bridge length, Ln2:Internal layer magnetic slot radial direction magnetic bridge length.
The application is for the permanent magnet reluctance motor that permanent magnet is ferrite material or Agglutinate neodymium-iron-boron material, compared to rare earth electricity
Machine, the disadvantage that ferrite has intrinsic coercivity low, needs the key design in anti-demagnetization.Specifically, it is provided on rotor punching
Magnetic slot, the hollow hole 13 of loss of weight and the axis hole for fixed rotor rotation.Magnetic slot is at least 2 layers, is close to axis hole
Internal layer magnetic slot is outer layer magnetic slot close to rotor outer circle.Rotor punching after hollow out by the tangential magnetic bridge in outer circle with
And it is connected as an entirety across the radial magnetic bridge on magnetic slot.What tangential magnetic bridge was necessarily present, radial magnetic bridge
Selectively existed according to rotor strength.
Due to U-shaped structure, indent is too deep, causes molding difficult, processing difficulties.Using the spliced of multi-disc, not only structure letter
Single, the design also for radial magnetic bridge from structure provides space, plays the role of reinforcing rib.Using this kind of structure, Ke Yitong
The structure for crossing reinforcing rib exists, and plays and alleviates the effect that U-shaped integral bottom is easy demagnetization.
Outer layer uses V-structure, more suitable for number of poles, such as 8 poles, 12 poles and with first-class structure.It not only can be by U-shaped knot
Structure simplifies, and the radial magnetic bridge structures of two needed for the diminution of angle, U-shaped structure become 1, and poly- magnetic effect is brighter
It is aobvious.Be conducive to the increase of permanent magnet flux linkage.
From figure 3, it can be seen that the predominating path of demagnetized field is as follows：1, it by the radial magnetic bridge of d axis, is closed from d axis；
2, it is closed from q axis by tangential magnetic bridge；3, slot is rolled over by magnetic slot end.The study found that in the case that actually demagnetizing, often
Since radial magnetic bridge and tangential magnetic bridge are more saturated.The demagnetization magnetic line of force that slot is rolled over by magnetic slot end is also more.Magnet steel
Thickness mainly depend on the magnetic resistance situation of this three predominating paths.
The bending of slot is rolled over by magnetic slot end, is extended out, magnetic bridge is close to q axis, it is possible to reduce tangential magnetic bridge is long
Degree, and reduce the mean breadth of magnetic slot folding slot end, to reduce the magnetic resistance on q axis, so as to improve the demagnetization on magnet steel
Magnetic potential size.
The width that magnetic slot rolls over slot end is minimum at rotor outer circle, is continuously increased close to the rotor center of circle, is conducive to alleviate
In tangential magnetic bridge supersaturation, shares the part demagnetization magnetic line of force and pass through from the folding slot end.Usual two profile sides
Angular range is 15 ° -45 ° (mechanical angles).To ensure that the amplitude that it is gradually increased is not excessive or too small.
The shortest distance of the folding slot close to one side profile side to the other side of d axis can be understood as the width of magnetic slot end
Average value, may further be defined as follows：It is arbitrarily taken a little on the side, and makees to justify as the center of circle, it is tangent with another side
The distance as shortest distance, takes multiple values.Internal layer magnetic slot is respectively：L21, L22 ... and outer layer magnetic slot are respectively：L11,
L12..., it averages respectively to two class values, the average distance of magnetic slot end folding slot, respectively L2, L1 can be obtained.
However, due to bending, the reduction of magnetic resistance can cause the d axle inductances of rotor to increase excessive on the paths, therefore performance
It also can be poorer.In order to ensure the anti-demagnetization capability of magnet steel, while d axle inductances being avoided to increase excessive caused salient pole than declining.When
When magnetic bridge length has following relationship with magnet thickness, it is ensured that the anti-demagnetization capability of magnet steel:
0.1×Wm2<Lt2<0.35×Wm2；
0.3×Wm1<Lt1<0.7×Wm1；
Further, due to the presence in demagnetized field path 1, the magnetic potential that outer layer magnet steel is undertaken is often too small, needs outer
The tangential magnetic bridge length Lt1 of layer magnetic slot is more than the tangential magnetic bridge length Lt2 of internal layer magnetic slot, realizes evenly distributing for magnetic potential,
I.e.：0.6<Lt1/(Lt1+Lt2)<0.9, since demagnetized field is substantially distributed in rotor outer circle side, to ensure close to rotor outer circle
There is the magnet steel of magnet steel end higher anti-demagnetization capability, magnet steel not to use corner cut, which designs for rectangle uniform thickness, or using summary
The design thickened, the amplitude usually thickened do not exceed 10%., as shown in the W1 and W2 in Fig. 2.
Further, the whole promotion for promoting anti-demagnetization capability, representative demagnetization is optimal, and to consider every magnet steel
Demagnetization rate it is balanced as possible, need further to take into account the magnetic resistance of magnetic slot folding slot end, pass through and introduce magnetic slot end
The parameter of folding slot average distance L1, L2 can make the demagnetization rate of ectonexine magnet steel more uniform when with following relationship.
Since in the case where magnetic bridge is extremely saturated, magnetic permeability is still big compared with air.Weight coefficient is in 1.3-2, can be with after conversion
It is equivalent to air.Evenly distributing for magnetic potential may be implemented according to this computational methods：
Wm1/Wm2=a × (Lt1/Lt2)+b × (L1/L2)；
Wherein a ∈ [1.3,2], b=1；
A is the weight of the lenth ratio of the magnetic bridge on rotor structure, and b is the folding slot average length on rotor structure
The weight of ratio.
Further, in conjunction with being seen on the path of demagnetized field, when magnetic slot inflection point hypotelorism, magnetic slot can be directly resulted in
End roll over slot magnetic conductive area reduce, magnetic resistance increase, cause force the magnetic line of force by magnetic field inside, cause to demagnetize.It therefore must be really
Protect space of the magnetic field between rotor outer circle：Min (J1, J2) >Ns×A1×Wt/4P.
That is, the size of A1 determines to overcome the main of the demagnetized field received from stator 40 required for all magnet steel of internal rotor
Size.Therefore, the minimum value in each turning point of multilayer magnetic slot apart from rotor outer circle minimum distance is more than per pole number of teeth half
The sum of width be multiplied by the polar arc angle that outermost layer folding slot end is formed close to one side point concentric of d axis.It may insure magnetic in this way
The line of force will not be excessively saturated at rotor outer periphery, cause the local demagnetization on magnet steel top.
It may be further contemplated, when magnetic bridge thickness difference, need to carry out perunit to the formula of same Lt1 and Lt2, such as Lt2
After thickness increases k times, the corresponding Lt2 values occurred want corresponding divided by k in formula.So that it is guaranteed that the accuracy of design.
The case where for without radial magnetic bridge, although d axle inductances can have certain variation, the above required protection model
It encloses and still sets up.For no radial direction every the magnetic the case where, magnet steel is using monoblock type, as shown in fig. 6, rolling over slot for magnetic slot end
And the versatility of radial magnetic bridge is equally applicable.
Than that described above, it is also necessary to which explanation is " one embodiment " spoken of in the present specification, " another implementation
Example ", " embodiment " etc. refer to that specific features, structure or the feature of embodiment description is combined to be included in the application summary
Property description at least one embodiment in.It is not centainly to refer to the same reality that statement of the same race, which occur, in multiple places in the description
Apply example.Furthermore, it is understood that when describing a specific features, structure or feature in conjunction with any embodiment, what is advocated is knot
Other embodiment is closed to realize that this feature, structure or feature are also fallen in the scope of the utility model.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, it may refer to the associated description of other embodiment.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (19)
1. a kind of rotor structure, which is characterized in that including：
Rotor body (10) is provided with magnetic slot group on the rotor body (10), and the magnetic slot group includes outer layer magnetic slot
(11), the outer layer magnetic slot (11) includes：
First outer layer magnetic slot section (111)；
Second outer layer magnetic slot section (112), the first outer layer magnetic slot section (111) and the second outer layer magnetic slot section
(112) radial direction along the rotor body (10) is oppositely disposed, the length side of the first outer layer magnetic slot section (111)
To the extended line of geometric center lines of length direction of geometric center lines and the second outer layer magnetic slot section (112) have the
One angle；
First folding slot (113), the first folding slot (113) are connected with the first outer layer magnetic slot section (111)；
Second folding slot (114), the second folding slot (114) are connected with the second outer layer magnetic slot section (112), and described first
Roll over the geometric center lines of length direction and the prolonging for the geometric center lines of the length direction of the second folding slot (114) of slot (113)
Long line has the second angle, wherein second angle is more than first angle.
2. rotor structure according to claim 1, which is characterized in that the first of the first outer layer magnetic slot section (111)
The shaft hole (14) towards the rotor body (10) is held to be extended, the second end of the first outer layer magnetic slot section (111)
It is extended towards the outer edge of the rotor body (10), the first end of the second outer layer magnetic slot section (112) is towards institute
It states shaft hole (14) to be extended, the second end of the second outer layer magnetic slot section (112) is towards the rotor body (10)
Outer edge is arranged.
3. rotor structure according to claim 2, which is characterized in that the first folding slot (113) and the second folding slot
(114) both sides of the d-axis of the rotor body (10), the first end and described first of the first folding slot (113) are located at
The second end of outer layer magnetic slot section (111) is connected, and the second end of the first folding slot (113) is towards the rotor body (10)
Outer edge extend and be gradually distance from d-axis setting, first end and the second outer layer magnetic of the second folding slot (114)
The second end of steel tank section (112) is connected, the outside of the second end of the second folding slot (114) towards the rotor body (10)
It is arranged along extending and being gradually distance from the d-axis.
4. rotor structure according to claim 3, which is characterized in that the width of the second end of the first folding slot (113)
Less than the width that the width of first end and/or the width of the second end of the second folding slot (114) are less than first end.
5. rotor structure according to claim 1, which is characterized in that the first of the second outer layer magnetic slot section (112)
End and the first end of the first outer layer magnetic slot section (111) are oppositely disposed to form v-shaped structure, alternatively, outside described second
The first end of layer magnetic slot section (112) is connected with the first end of the first outer layer magnetic slot section (111) with U-shaped structure.
6. rotor structure according to any one of claim 1 to 4, which is characterized in that the magnetic slot group further includes：
Internal layer magnetic slot (12), the outer layer magnetic slot (11) are disposed adjacently with the internal layer magnetic slot (12), the outer layer
Magnetic conduction channel is formed between magnetic slot (11) and the internal layer magnetic slot (12), the internal layer magnetic slot (12) includes setting gradually
The first internal layer magnetic slot section (121), the second internal layer magnetic slot section (122) and third internal layer magnetic slot section (123),
The first internal layer magnetic slot section (121), the second internal layer magnetic slot section (122) and the third internal layer magnetic slot section
(123) it is sequentially communicated to form U-shaped structure of the opening towards the outer edge of the rotor body (10), alternatively,
The first internal layer magnetic slot section (121), the second internal layer magnetic slot section (122) and the third internal layer magnetic slot section
(123) it is positioned apart from successively, the first internal layer magnetic slot section (121), the second internal layer magnetic slot section (122) and described
In third internal layer magnetic slot section (123) magnetic bridge is formed between adjacent two.
7. rotor structure according to claim 6, which is characterized in that
The first internal layer magnetic slot section (121) includes third folding slot (124), the first end of the third folding slot (124) and institute
The end for stating the outer edge close to the rotor body (10) of the first internal layer magnetic slot section (121) is connected, the third folding
The outer edge of the second end of slot (124) towards the rotor body (10) extends and is gradually distance from the straight of the rotor body (10)
Axis；
The third internal layer magnetic slot section (123) includes four fold slot (125), the first end of the four fold slot (125) and institute
The end for stating the outer edge close to the rotor body (10) of third internal layer magnetic slot section (123) is connected, the four fold
The outer edge of the second end of slot (125) towards the rotor body (10) extends and is gradually distance from the d-axis.
8. rotor structure according to claim 7, which is characterized in that 0.3 × Wm1<Lt1/k1<0.7 × Wm1,
Wherein, Wm1 is the width of the first outer layer magnetic slot section (111) or the second outer layer magnetic slot section (112)；
Lt1 is the outer edge of the cell wall and the rotor body (10) of the first folding slot (113) or the second folding slot (114)
Between the length of magnetic bridge that is formed；
K 1 is the first perunit value.
9. rotor structure according to claim 8, which is characterized in that 0.1 × Wm2<Lt2/k2<0.35 × Wm2,
Wherein, Wm2 is the width of the first internal layer magnetic slot section (121) or the third internal layer magnetic slot section (123)；
Lt2 is the outer edge that the third rolls over slot (124) or the cell wall and the rotor body (10) of the four fold slot (125)
Between the length of magnetic bridge that is formed；
K 2 is the second perunit value.
10. rotor structure according to claim 9, which is characterized in that 0.6<Lt1/(Lt1/k1+Lt2/k2)<0.9.
11. rotor structure according to claim 9, which is characterized in that Wm1/Wm2=a × (Lt1/k1/Lt2/k)+b ×
(L1/L2),
Wherein,
A is the weight of the lenth ratio of the magnetic bridge on the rotor structure；
B is the weight of the ratio of the average length of the folding slot on the rotor structure；
L1 is the average thickness of the first folding slot (113) and/or the second folding slot (114)；
L2 is that the third rolls over slot (124) and/or the average thickness of the four fold slot (125).
12. rotor structure according to claim 11, which is characterized in that a ∈ [1,2], and/or, b=1.
13. rotor structure according to claim 7, which is characterized in that the rotor structure further includes outer layer permanent magnet
(20) it is set in the outer layer magnetic slot (11) with internal layer permanent magnet (30), the outer layer permanent magnet (20), the internal layer is forever
Magnet (30) is set in the internal layer magnetic slot (12).
14. rotor structure according to claim 13, which is characterized in that min (J1, J2) >Ns × A × Wt/4P,
Wherein, J1 is the end of outer layer permanent magnet (20) and the minimum range at the outer edge of the rotor body (10)；
J2 is the end of internal layer permanent magnet (30) and the minimum range at the outer edge of the rotor body (10)；
Ns is the number of teeth of stator tooth；
A rolls over end and the institute of slot (124) and the side wall close to the d-axis side of the four fold slot (125) for the third
State the polar arc angle that the line between the hole heart of the shaft hole (14) of rotor body (10) is formed；
Wt is the width of the stator tooth；
P is the number of poles of the rotor structure.
15. rotor structure according to claim 6, which is characterized in that the magnetic slot group further includes：
Third layer magnetic slot, the third layer magnetic slot are disposed adjacently with the internal layer magnetic slot (12), the third layer magnetic
Form magnetic conduction channel between steel tank and the internal layer magnetic slot (12), the third layer magnetic slot is overall U-shaped or arc.
16. rotor structure according to claim 13, which is characterized in that the permanent magnet material is ferrite or bonding neodymium
Iron boron.
17. rotor structure according to claim 9, which is characterized in that
As Wt1 < Wt2, k1=1, k2=max (Wt1, Wt2)/min (Wt1, Wt2), alternatively,
As Wt1 > Wt2, k2=1, k1=max (Wt1, Wt2)/min (Wt1, Wt2),
Wherein, Wt1 is the cell wall and the rotor body (10) of the first folding slot (113) or the second folding slot (114)
The width of the magnetic bridge formed between outer edge；
Wt2 is the outer edge that the third rolls over slot (124) or the cell wall and the rotor body (10) of the four fold slot (125)
Between the width of magnetic bridge that is formed.
18. a kind of permanent magnetism assist in synchronization reluctance motor, including rotor structure, which is characterized in that the rotor structure is wanted for right
Seek the rotor structure described in any one of 1 to 17.
19. a kind of electric vehicle, including rotor structure, which is characterized in that the rotor structure is any in claim 1 to 17
Rotor structure described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820369018.2U CN208015471U (en) | 2018-03-16 | 2018-03-16 | Rotor structure, permanent magnetism assist in synchronization reluctance motor and electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820369018.2U CN208015471U (en) | 2018-03-16 | 2018-03-16 | Rotor structure, permanent magnetism assist in synchronization reluctance motor and electric vehicle |
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| Publication Number | Publication Date |
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| CN208015471U true CN208015471U (en) | 2018-10-26 |
Family
ID=63889768
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| CN201820369018.2U Withdrawn - After Issue CN208015471U (en) | 2018-03-16 | 2018-03-16 | Rotor structure, permanent magnetism assist in synchronization reluctance motor and electric vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108321954A (en) * | 2018-03-16 | 2018-07-24 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor structure, permanent magnetism assist in synchronization reluctance motor and electric vehicle |
| CN110912297A (en) * | 2019-12-11 | 2020-03-24 | 安徽美芝精密制造有限公司 | Motor and compressor |
-
2018
- 2018-03-16 CN CN201820369018.2U patent/CN208015471U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108321954A (en) * | 2018-03-16 | 2018-07-24 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor structure, permanent magnetism assist in synchronization reluctance motor and electric vehicle |
| CN108321954B (en) * | 2018-03-16 | 2020-10-23 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric automobile |
| CN110912297A (en) * | 2019-12-11 | 2020-03-24 | 安徽美芝精密制造有限公司 | Motor and compressor |
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Granted publication date: 20181026 Effective date of abandoning: 20201023 |