CN206481124U - A kind of motor rotor construction - Google Patents
A kind of motor rotor construction Download PDFInfo
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- CN206481124U CN206481124U CN201621143432.9U CN201621143432U CN206481124U CN 206481124 U CN206481124 U CN 206481124U CN 201621143432 U CN201621143432 U CN 201621143432U CN 206481124 U CN206481124 U CN 206481124U
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- magnet
- iron core
- motor rotor
- rotor construction
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Abstract
The utility model provides a kind of motor rotor construction, including iron core and some magnet being arranged on the iron core；The magnet is shaped as cylinder, and the thickness of the cross section of the cylinder is gradually reduced from centre position to two ends.The motor rotor construction is mainly used in the motor of compressor, by the magnet arrangement for designing not uniform thickness, magnet is set to produce magnetomotive force centre position maximum, two ends are minimum, gradually reduce from centre position to two ends, then the no-load back electromotive force waveform sine produced is good, is conducive to reducing total harmonic component, so as to improve the performance of motor, reduce the noise of motor；On the other hand, by setting trimming on magnet, the orientation problem of magnet in process is solved, while the leakage field at magnet two ends can also be reduced.
Description
Technical field
The utility model is related to machine field, more particularly to a kind of motor rotor construction.
Background technology
Compressor is widely used in daily electrical equipment, and general compressor can configure ferrite variable-frequency motor.Refering to Fig. 1,
It is illustrated that the diagrammatic cross-section of existing variable-frequency motor.Wherein, magnet magnet thickness in the range of polar arc is identical, magnet production
Raw magnetomotive force is identical, therefore back emf waveform sine is poor, and harmonic component is big, influences the performance of variable-frequency motor.
Utility model content
The purpose of this utility model is to provide a kind of motor rotor construction, to solve the magnet in existing rotor
Produced back emf waveform sine is poor, the problem of harmonic component is big.
In order to solve the above technical problems, the utility model provides a kind of motor rotor construction, including iron core and it is arranged at institute
State some magnet on iron core；
The magnet is shaped as cylinder, and the thickness of the cross section of the cylinder is gradually reduced from centre position to two ends.
Optionally, the two ends include first end and the second end, the thickness of the first end, the thickness in the centre position
And the relation of the thickness at second end is as follows:
H2=H3, and
Wherein, H2 and H3 represent the thickness of the first end and the thickness at second end respectively, and H1 represents centre position
Thickness.
Optionally, several magnet grooves are provided with the iron core, several described magnet grooves are surrounded in the iron core
One magnet is set in heart equidistantly distributed, each magnet groove.
Optionally, be provided with each magnet groove for reduce magnet leakage field every magnetic magnetic bridge, it is described every magnetic magnetic bridge position
In the outside of the magnet.
Optionally, the two ends of the cross section of the cylinder include two trimmings, and the length range of each trimming is
0.1mm~2mm.
Optionally, axis hole is additionally provided with the iron core, the axis hole is located at the center of the iron core.
Optionally, in addition to two end plates for preventing the magnet from dropping out, described two end plates are respectively arranged at institute
State the two ends of iron core.
Optionally, the rivet hole for fixing the end plate is additionally provided with the iron core, the rivet hole is around the axle
Hole equidistantly distributed.
Optionally, the quantity of the magnet is at least two.
Optionally, the magnet is ferrite lattice.
Optionally, the iron core gets up to constitute by some silicon steel sheet stack rivetings.
The motor rotor construction is mainly used in the motor of compressor, by designing the magnet arrangement of not uniform thickness, makes magnet
Produce magnetomotive force centre position maximum, two ends are minimum, gradually reduce from centre position to two ends, then the no-load back electromotive force produced
Waveform sine is good, is conducive to reducing total harmonic component, so as to improve the performance of motor, reduces the noise of motor；On the other hand,
By setting trimming on magnet, the orientation problem of magnet in process is solved, while magnet two ends can also be reduced
Leakage field.
Brief description of the drawings
Fig. 1 is the diagrammatic cross-section of existing variable-frequency motor；
Fig. 2 is the diagrammatic cross-section of the variable-frequency motor of the embodiment of the application one；
Fig. 3 is the diagrammatic cross-section of the motor rotor construction of the embodiment of the application one, wherein having concealed one magnet in lower section；
Fig. 4 is the partial enlarged drawing in Fig. 3；
Fig. 5 is the schematic diagram of iron core；
Fig. 6 is the diagrammatic cross-section of single magnet in the variable-frequency motor for apply an embodiment.
In figure：1- stators；2- rotors；21- magnet；22- iron cores；221- magnet grooves；2211- is every magnetic magnetic bridge；222- rivets
Hole；223- axis holes.
Embodiment
The core concept of the application is the magnet 21 in rotor 2 being designed to not uniform thickness structure, thickness from it is middle gradually
It is gradually reduced to two ends, then magnet 21 is gradually reduced from centre along polar arc to the magnetomotive force at two ends, it is maximum in the middle of such magnetomotive force,
Gradually reduce to two ends, then the no-load back electromotive force waveform sine that magnet 21 is produced is good, is conducive to reducing total harmonic component.Need
To illustrate that thickness referred herein refers to the thickness of magnet cross section.
Below in conjunction with the drawings and specific embodiments to the utility model proposes motor rotor construction make further specifically
It is bright.According to following explanation and claims, advantages and features of the present utility model will become apparent from.It should be noted that, accompanying drawing is equal
It is only real conveniently, lucidly to aid in illustrating the utility model using very simplified form and using non-accurately ratio
Apply the purpose of example.
Refering to Fig. 2 and Fig. 3, shown in it is the diagrammatic cross-section and rotor knot of the variable-frequency motor of the present embodiment respectively
The diagrammatic cross-section of structure, wherein Fig. 3 are Fig. 2 rotor parts.
Variable-frequency motor mainly includes stator 1 and rotor 2, wherein, stator 1 is centered around the outside of rotor 2, is generally fixed to pressure
On contracting machine.Rotor 2 includes some magnet 21 and iron core 22.
Refering to Fig. 5, it is illustrated that the structural representation of iron core 22, and iron core 22 is usually the silicon steel for 0.35mm by thickness
Piece is folded riveting after punching press and got up, and composition has certain thickness iron core 22, and iron core 22 generally comprises magnet groove 221, rivet hole
222nd, the structure such as axis hole 223, in order to reduce the leakage field problem at the two ends of magnet 21, class triangle is separately designed at the two ends of magnet groove 221
Shape every magnetic magnetic bridge 2211.Axis hole 223 is assembled together with compressor crank shaft, that is, is made by axis hole 223 and bent axle
Rotor 2 is assembled together with compressor.
Optionally, the quantity of magnet 21 is at least two, and preferably the quantity of magnet 21 is four, six or eight.For
Facilitate and four magnet 21 are provided with explanation, the present embodiment, the quantity of corresponding magnet groove 221 is also four, magnet 21 quilt
It is arranged in magnet groove 221, and end plate (not shown) is installed to prevent magnet 21 from magnet groove 221 at the two ends of iron core 22
Drop out.End plate one end or two ends typically also placed similar balance weight (not shown), iron core 22, end plate, balance weight
Riveted after being run through using rivet, so that ensure that iron core 22, end plate, balance weight are fixed together, and magnet 21 is in end plate
Do not fall out out under stop.
Refering to Fig. 4 and Fig. 6, shown in it is Fig. 3 partial enlarged drawing and the diagrammatic cross-section of single magnet 21 respectively.Under
Face combines the structure that a lower magnet 21 is discussed in detail in the two accompanying drawings.
Magnet 21 is designed to not uniform thickness structure, and magnet 21 is shaped as cylinder, and the thickness of the cross section of cylinder is by interposition
Put to two ends and be gradually reduced, then magnet 21 is gradually reduced from centrally along polar arc to the magnetomotive force at two ends, in the middle of such magnetomotive force most
Greatly, gradually reduce to both sides, two ends are minimum.
Preferably, the section of magnet 21 is in approximately crescent, two ends are thin, thick middle, and along intermediate symmetry.Say for convenience
Bright, the cross section of cylinder includes first end, the second end and centre position.First end, the second end and centre have been marked in Fig. 5 respectively
The thickness of position, when 21 two-end thickness relative intermediate position thickness ratio 0.125~0.450 of magnet, the harmonic wave of counter electromotive force
Component is minimum, and sine is best, i.e.,：
As H2=H3 andWhen, back emf waveform harmonic component is minimum.
Wherein, H2 and H3 represent the thickness of the first end and the thickness at second end respectively, and H1 represents centre position
Thickness.
Preferably, magnet 21 is ferrite lattice.
Magnet 21 is processed for convenience, two trimmings have been separately designed at the two ends of magnet 21, in processing magnet 21
When convenient position.The length of two trimmings has been marked in Fig. 4, has been represented respectively with L1, L2, and L1=0.1mm~2mm, L2=
0.1mm~2mm.
The motor rotor construction that the application is provided has the advantages that：The motor rotor construction is mainly used in compressor
Motor in, by the magnet arrangement of design not uniform thickness, producing magnet 21, magnetomotive force centre position is maximum, and two ends are minimum, from
Centre position gradually reduces to two ends, then the no-load back electromotive force waveform sine produced is good, is conducive to reducing total harmonic component,
So as to improve the performance of motor, reduce the noise of motor；On the other hand, by setting trimming on magnet, solve magnet and exist
Orientation problem in process, while the leakage field at magnet two ends can also be reduced.
Foregoing description is only the description to the utility model preferred embodiment, not to any limit of the utility model scope
Calmly, the those of ordinary skill in the utility model field does according to the disclosure above content any change, modification, belonging to right will
Seek the protection domain of book.
Claims (10)
1. a kind of motor rotor construction, it is characterised in that including iron core and some magnet being arranged on the iron core；
The magnet is shaped as cylinder, and the thickness of the cross section of the cylinder is gradually reduced from centre position to two ends；It is described
Two ends include first end and the second end, the thickness of the thickness of the first end, the thickness in the centre position and second end
The relation of degree is as follows:
H2=H3, and
Wherein, H2 and H3 represent the thickness of the first end and the thickness at second end respectively, and H1 represents the thickness in centre position
Degree.
2. motor rotor construction as claimed in claim 1, it is characterised in that several magnet grooves are provided with the iron core,
Several described magnet grooves, which are surrounded, sets a magnet in the center equidistantly distributed of the iron core, each magnet groove.
3. motor rotor construction as claimed in claim 2, it is characterised in that be provided with each magnet groove for reducing magnetic
Iron leakage field every magnetic magnetic bridge, the outside that the magnet is located at every magnetic magnetic bridge.
4. motor rotor construction as claimed in claim 1, it is characterised in that the two ends of the cross section of the cylinder include two
Individual trimming, the length range of each trimming is 0.1mm~2mm.
5. motor rotor construction as claimed in claim 1, it is characterised in that axis hole, the axle are additionally provided with the iron core
Hole position is in the center of the iron core.
6. motor rotor construction as claimed in claim 5, it is characterised in that also including two for preventing that the magnet from dropping out
Individual end plate, described two end plates are respectively arranged at the two ends of the iron core.
7. motor rotor construction as claimed in claim 6, it is characterised in that be additionally provided with the iron core for fixed described
The rivet hole of end plate, the rivet hole is around the axis hole equidistantly distributed.
8. motor rotor construction as claimed in claim 1, it is characterised in that the quantity of the magnet is at least two.
9. motor rotor construction as claimed in claim 1, it is characterised in that the magnet is ferrite lattice.
10. motor rotor construction as claimed in claim 1, it is characterised in that the iron core is got up by some silicon steel sheet stack rivetings
Composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621143432.9U CN206481124U (en) | 2016-10-20 | 2016-10-20 | A kind of motor rotor construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621143432.9U CN206481124U (en) | 2016-10-20 | 2016-10-20 | A kind of motor rotor construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206481124U true CN206481124U (en) | 2017-09-08 |
Family
ID=59755861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621143432.9U Active CN206481124U (en) | 2016-10-20 | 2016-10-20 | A kind of motor rotor construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206481124U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300738A (en) * | 2016-10-20 | 2017-01-04 | 上海日立电器有限公司 | A kind of motor rotor construction |
-
2016
- 2016-10-20 CN CN201621143432.9U patent/CN206481124U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300738A (en) * | 2016-10-20 | 2017-01-04 | 上海日立电器有限公司 | A kind of motor rotor construction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201206 Pudong New Area Jinqiao Ning Road, Shanghai, No. 888 Patentee after: Shanghai Haili Electrical Appliance Co. Ltd. Address before: 201206 Pudong New Area Jinqiao Ning Road, Shanghai, No. 888 Patentee before: Rili Electric Appliance Co., Ltd., Shanghai |
|
| CP01 | Change in the name or title of a patent holder |