CN208241432U - Rotor structure and motor with it - Google Patents
Rotor structure and motor with it Download PDFInfo
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- CN208241432U CN208241432U CN201820804424.7U CN201820804424U CN208241432U CN 208241432 U CN208241432 U CN 208241432U CN 201820804424 U CN201820804424 U CN 201820804424U CN 208241432 U CN208241432 U CN 208241432U
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- rotor
- magnet steel
- bore
- magnetic isolation
- rotor structure
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Abstract
The utility model provides a kind of rotor structure and the motor with it.Rotor structure, comprising: rotor body；Magnet steel, magnet steel be it is multiple, multiple magnet steel are positioned apart from along the radial direction of rotor body；Magnetic isolation unit, magnetic isolation unit be it is multiple, multiple magnetic isolation units are respectively arranged between two adjacent magnet steel；Wherein, the distance at magnetic isolation unit to the hole heart of the axis hole of rotor body is less than or equal to the distance at magnet steel to the hole heart.The performance that the rotor structure can be effectively improved improves the rated current of the motor with the rotor structure and the efficiency of motor.
Description
Technical field
The utility model relates to motor device technical fields, in particular to a kind of rotor structure and with its electricity
Machine.
Background technique
In the prior art, long magnet embedded motor rotor has higher reliable than permanent magnet surface-mount type rotor
Property, and the box-shaped magnet steel of permanent magnetic baried type rotor than permanent magnet surface-mount type rotor tile-shaped magnet steel at
This is lower, so permanent magnetic baried type motor is increasingly by the welcome of industry.Permanent magnetic baried type motor is divided into magnet steel
Two kinds of tangential flush type and magnet steel radial direction flush type, due to being limited by permanent magnetic baried type rotor structure in the prior art,
The problem of efficiency of permanent magnetic baried type motor in the prior art still has efficient.
Magnet steel radial direction flush type rotor is compared forever, and the tangential flush type rotor of magnet steel can be supplied to effective magnetomotive force of motor
Bigger, the power density of motor can do more.In order to improve the performance of tangential magnet-steel flush type motor, each motor producer
All making great efforts to develop more efficient, cogging torque and the smaller motor of torque pulsation.
Utility model content
The main purpose of the utility model is to provide a kind of rotor structure and with its motor, to solve the prior art
The low problem of middle electric efficiency.
To achieve the goals above, one aspect rotor structure according to the present utility model and the motor with it, provide
A kind of rotor structure, comprising: rotor body；Magnet steel, magnet steel be it is multiple, multiple magnet steel are along the radial direction interval of rotor body
Ground setting；Magnetic isolation unit, magnetic isolation unit be it is multiple, multiple magnetic isolation units are respectively arranged between two adjacent magnet steel；Wherein, magnetic isolation unit
Distance to the hole heart of the axis hole of rotor body is less than or equal to the distance at magnet steel to the hole heart.
Further, projection line of the end of the magnet steel adjacent with magnetic isolation unit in magnetic isolation unit to magnetic isolation unit radially
The length of end far from axis hole one end is c, wherein the gas that 1.2≤c/ (2a)≤5, a is formed between rotor body and stator
Gap width.
Further, magnetic isolation unit be opened on rotor body every bore, every the radial direction side along rotor body of bore
To cross section be in polygonized structure, every one of side of bore towards axis hole be arranged.
Further, every the cross section of the radial direction along rotor body of bore be in quadrangle, magnet steel at least one
Side is arranged parallelly with adjacent at least one side every bore.
Further, it is gradually increased every the radially outside width of bore.
Further, every the cross section of the radial direction along rotor body of bore in pentagon, radially every bore
The outside width in direction is gradually reduced after gradually increasing preset length.
Further, magnet steel is tangential flush type permanent-magnet steel.
Further, the length every at least two adjacent sides of bore is identical.
Another aspect according to the present utility model, provides a kind of motor, including rotor structure, and rotor structure is above-mentioned
Rotor structure.
Further, motor further include: stator, rotor body are set in stator, the outer peripheral surface and stator of rotor body
Stator tooth between the width of air gap that is formed be a.
Using the technical solution of the utility model, the distance at the hole heart of the axis hole of magnetic isolation unit to rotor body is arranged to
Less than or equal to the distance at magnet steel to the hole heart, the performance of the rotor structure can be effectively improved, is improved with the rotor
The rated current of the motor of structure and the efficiency of motor.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide a further understanding of the present invention, this is practical
Novel illustrative embodiments and their description are not constituteed 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 enlarged structure schematic diagrams at A in Fig. 1；
Fig. 3 shows the structural schematic diagram of the second embodiment of rotor structure according to the present utility model；
Fig. 4 shows in Fig. 3 enlarged structure schematic diagram at B；
Fig. 5 shows the effect picture of the rated current of motor according to the present utility model；
Fig. 6 shows the effect picture of the cogging torque of motor according to the present utility model；
Fig. 7 shows the effect picture of the torque pulsation of motor according to the present utility model.
Wherein, the above drawings include the following reference numerals:
10, rotor body；20, magnet steel；30, magnetic isolation unit；40, stator.
Specific embodiment
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 embodiment, 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 singular
Also it is 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 their combination.
It should be noted that term " first ", " second " etc. in the description and claims of this application and attached drawing
It is to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that the art used in this way
Language is interchangeable under appropriate circumstances, 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 " includes " and " having " and their any deformation, it is intended that
Cover it is non-exclusive include, for example, containing the process, method, system, product or equipment of a series of steps or units need not limit
In step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, produce
The other step or units of product or equipment inherently.
For ease of description, spatially relative term can be used herein, as " ... on ", " ... 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, being described as if the device in attached drawing is squeezed " 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 be positioned with other different modes and (is rotated by 90 ° or 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 it is thoroughly and complete to these embodiments are provided so that disclosure herein, 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. 4, 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, magnet steel 20 and magnetic isolation unit 30.Magnet steel 20 is more
A, multiple magnet steel 20 are positioned apart from along the radial direction of rotor body 10.Magnetic isolation unit 30 is multiple, multiple difference of magnetic isolation units 30
It is set between two adjacent magnet steel 20.Wherein, the distance at magnetic isolation unit 30 to the hole heart of the axis hole of rotor body 10 is less than
Or equal to the distance at magnet steel 20 to the hole heart.
In the present embodiment, the distance at the hole heart of the axis hole of magnetic isolation unit 30 to rotor body 10 is set smaller than or is waited
Distance at magnet steel 20 to the hole heart can effectively improve the performance of the rotor structure, improve with the rotor structure
The rated current and electric efficiency of motor.I.e. in the present embodiment, the outer edge by adjacent pores heart side of magnetic isolation unit 30 is to the hole heart
Distance be less than or equal to magnet steel 20 the outer edge by adjacent pores heart side to the hole heart distance, i.e., as shown in figure 4, in this way be arranged
When magnetic isolation unit 30 the outer edge by adjacent pores heart side to the hole heart distance be equal to magnet steel 20 the outer edge by adjacent pores heart side
To the hole heart apart from when, d=0, when the distance of outer edge by adjacent pores heart side to the hole heart of magnetic isolation unit 30 is less than magnet steel 20
By adjacent pores heart side outer edge to the hole heart apart from when, d > 0.
Wherein, projection line of the end of the magnet steel 20 adjacent with magnetic isolation unit 30 in magnetic isolation unit 30 to magnetic isolation unit 30 radially
The length of end of the direction far from axis hole one end is c, wherein 1.2≤c/ (2a)≤5, a shape between rotor body 10 and stator
At width of air gap.So that the rated current of the motor with the structure reaches minimum, efficiency effectively improves for setting in this way,
Cogging torque and torque pulsation are in preferably horizontal, and electric machine combination property is best.
Magnetic isolation unit 30 be opened on rotor body 10 every bore.Every the radial direction along rotor body 10 of bore
Cross section is in polygonized structure, is arranged every one of side of bore towards axis hole.Preferably, as shown in Fig. 2, every the edge of bore
The cross section of the radial direction of rotor body 10 be in quadrangle, at least one side of magnet steel 20 and it is adjacent every bore at least
There is a side to be arranged parallelly.Setting enables to the magnetism isolating effect of the magnetic isolation unit to be optimal in this way.Preferably, every bore
Radially outside width gradually increase.In Fig. 1, opposite two side of magnet steel 20 is adjacent thereto every magnetic
The side in hole is arranged parallelly, i.e., sets parallelly every the side of opposite two side of bore magnet steel 20 adjacent thereto
It sets.
In another embodiment of the application, as shown in Figure 3 and Figure 4, every the radial direction side along rotor body 10 of bore
To cross section be in pentagon, be gradually reduced after the radially outside width of bore gradually increases preset length.This
Sample setting can equally be played the role of improving the rotor structure performance.In the present embodiment, magnet steel 20 be tangential flush type forever
Long magnet steel.
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 is provided.The motor includes rotor structure.Rotor structure is the rotor structure in above-described embodiment.?
In the present embodiment, motor further includes stator 40, and rotor body 10 is set in stator 40, the outer peripheral surface and stator of rotor body 10
The width of air gap formed between 40 stator tooth is a.
Specifically, in the present embodiment, which is the tangential flush type motor of magnet steel.By stator, rotor, magnet steel, shaft,
The parts such as casing, end cap and bearing are constituted.As shown in Figure 1, diameter of stator bore and rotor diameter form air-gap, width of air gap a.
Stator and rotor are formed by silicon steel plate stacking, and permanent magnet magnet steel is with radial formal distribution on rotor.There is design on rotor
Magnetic isolation unit, magnetic isolation unit are located at two pieces of adjacent magnet steel middle positions, and effect is to prevent the magnetic field of magnet steel generation from magnet steel trench bottom
Forming circuit.Length every at least two adjacent sides of bore is identical, magnetic isolation unit as shown in Fig. 2, by 4 side L1, L2,
L3 and L4 is constituted.L1=L4.L1 and L4 and adjacent magnet steel or parallel with the cell wall of mounting magnetic steel slot.L1 and L4 is with adjacent magnetic
Steel tank bottom edge extended line is to be divided into two sections, and length is respectively c and d.Since effectively play separated magnetic effect is c sections, d sections only
Separated magnetic effect can be played by being greater than 0, so the length for c sections has carried out Electromagnetic Simulation calculating, it is therefore an objective to find optimal c
Segment length.It is calculated using the ratio c/ (2a) of c segment length and gas length a as parameter when emulation.
Rated current is the important indicator of motor, and the smaller electric efficiency of rated current is higher.Rated current under different c/a
Change curve is as shown in figure 5, rated current is in minimum level when 1.2≤c/ (2a)≤5.C/ (2a) < 1.2 and c/ (2a) > 5
When rated current significantly increase.
Cogging torque is the important indicator of motor, and cogging torque is smaller, and motor dynamics response performance is better.Different c/ (2a)
The change curve of lower cogging torque is as shown in Figure 6.When 1.2≤c/ (2a)≤5, cogging torque is almost the same.1.2 He of c/ (2a) <
Cogging torque is substantially reduced when c/ (2a) > 5.
Torque pulsation is another important indicator of motor, and the smaller motor operation of torque pulsation is more stable.Different c/ (2a)
The change curve of lower torque pulsation is as shown in Figure 7.Under different c/ (2a), torque pulsation is almost the same, and c/ (2a) is to torque arteries and veins
It moves substantially without influence.
So rated current of motor is minimum when the above performance parameter of comprehensive analysis concludes that 1.2≤c/ (2a)≤5, effect
Rate highest, cogging torque and torque pulsation are in preferably horizontal, and electric machine combination property is best.
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 is advocated is knot when describing a specific features, structure or feature in conjunction with any embodiment
Other embodiments are 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, reference can be made to the related descriptions of other embodiments.
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 (10)
1. a kind of rotor structure characterized by comprising
Rotor body (10)；
Magnet steel (20), the magnet steel (20) are multiple, radial direction of multiple magnet steel (20) along the rotor body (10)
It is positioned apart from；
Magnetic isolation unit (30), the magnetic isolation unit (30) be it is multiple, multiple magnetic isolation units (30) are respectively arranged at two adjacent institutes
It states between magnet steel (20)；
Wherein, the distance at the magnetic isolation unit (30) to the hole heart of the axis hole of the rotor body (10) is less than or equal to the magnetic
Distance at steel (20) to the hole heart.
2. rotor structure according to claim 1, which is characterized in that
Projection line of the end of the adjacent magnet steel (20) on the magnetic isolation unit (30) is to described with the magnetic isolation unit (30)
The length of end of the magnetic isolation unit (30) radially far from described axis hole one end is c, wherein 1.2≤c/ (2a)≤5, a is institute
State the width of air gap formed between rotor body (10) and stator.
3. rotor structure according to claim 1, which is characterized in that the magnetic isolation unit (30) is to be opened in the rotor sheet
On body (10) every bore, the cross section of the radial direction along the rotor body (10) every bore is in polygon knot
Structure, one of side every bore are arranged towards the axis hole.
4. rotor structure according to claim 3, which is characterized in that it is described every bore along the rotor body (10)
The cross section of radial direction is in quadrangle, at least one side of the magnet steel (20) and it is adjacent it is described every bore at least
One side is arranged parallelly.
5. rotor structure according to claim 4, which is characterized in that the radially outside width every bore
It gradually increases.
6. rotor structure according to claim 3, which is characterized in that it is described every bore along the rotor body (10)
The cross section of radial direction is in pentagon, the radially outside width every bore gradually increase after preset length by
It is decrescence small.
7. rotor structure according to claim 1, which is characterized in that the magnet steel (20) is tangential flush type permanent magnetic
Steel.
8. rotor structure according to claim 3, which is characterized in that at least two adjacent sides every bore
Length it is identical.
9. a kind of motor, including rotor structure, which is characterized in that the rotor structure is described in any one of claims 1 to 8
Rotor structure.
10. motor according to claim 9, which is characterized in that the motor further include:
Stator (40), the rotor body (10) are set in the stator (40), the outer peripheral surface of the rotor body (10) with
The width of air gap formed between the stator tooth of the stator (40) is a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820804424.7U CN208241432U (en) | 2018-05-28 | 2018-05-28 | Rotor structure and motor with it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820804424.7U CN208241432U (en) | 2018-05-28 | 2018-05-28 | Rotor structure and motor with it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208241432U true CN208241432U (en) | 2018-12-14 |
Family
ID=64575942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820804424.7U Active CN208241432U (en) | 2018-05-28 | 2018-05-28 | Rotor structure and motor with it |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208241432U (en) |
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2018
- 2018-05-28 CN CN201820804424.7U patent/CN208241432U/en active Active
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