CN106300738A - A kind of motor rotor construction - Google Patents
A kind of motor rotor construction Download PDFInfo
- Publication number
- CN106300738A CN106300738A CN201610916614.3A CN201610916614A CN106300738A CN 106300738 A CN106300738 A CN 106300738A CN 201610916614 A CN201610916614 A CN 201610916614A CN 106300738 A CN106300738 A CN 106300738A
- Authority
- CN
- China
- Prior art keywords
- magnet
- motor rotor
- iron core
- rotor construction
- thickness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000009966 trimming Methods 0.000 claims abstract description 9
- 229910000859 α-Fe Inorganic materials 0.000 claims description 4
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention provides a kind of motor rotor construction, including iron core and the some Magnet being arranged on described iron core；Described Magnet be shaped as cylinder, the thickness of the cross section of described cylinder is gradually reduced to two ends by centre position.This motor rotor construction is mainly used in the motor of compressor, by designing the magnet arrangement of not uniform thickness, Magnet is made to produce magnetomotive force centre position maximum, two ends are minimum, gradually reduce to two ends from centre position, then the no-load back electromotive force waveform sine produced is good, is conducive to reducing total harmonic component, thus improve the performance of motor, reduce the noise of motor；On the other hand, by arranging trimming on Magnet, solve Magnet orientation problem in the course of processing, the leakage field at Magnet two ends can also be reduced simultaneously.
Description
Technical field
The present invention relates to machine field, particularly to a kind of motor rotor construction.
Background technology
Compressor is widely used in daily electrical equipment, and general compressor can configure ferrite frequency conversion motor.Refering to Fig. 1,
It is illustrated that the generalized section of existing frequency conversion motor.Wherein, Magnet magnet thickness in the range of polar arc is identical, and Magnet produces
Raw magnetomotive force is identical, and therefore back emf waveform sine is poor, and harmonic component is big, affects the performance of frequency conversion motor.
Summary of the invention
It is an object of the invention to provide a kind of motor rotor construction, produced solving the Magnet in existing rotor
Raw back emf waveform sine is poor, the problem that harmonic component is big.
For solving above-mentioned technical problem, the present invention provides a kind of motor rotor construction, including iron core be arranged at described ferrum
Some Magnet on core；
Described Magnet be shaped as cylinder, the thickness of the cross section of described cylinder is gradually reduced to two ends by centre position.
Optionally, described two ends include the first end and the second end, the thickness of described first end, the thickness in described centre position
And the relation of the thickness of described second end is as follows:
H2=H3, and
Wherein, H2 and H3 represents thickness and the thickness of described second end of described first end respectively, and H1 represents centre position
Thickness.
Optionally, described iron core being provided with several Magnet grooves, several Magnet grooves described are around in described iron core
The heart is equidistantly distributed, and arranges a Magnet in each Magnet groove.
Optionally, each Magnet groove is provided with for reduce Magnet leakage field every magnetic magnetic bridge, described every magnetic magnetic bridge position
Outside in described Magnet.
Optionally, the two ends of the cross section of described cylinder all include two trimmings, and the length range of each trimming is
0.1mm～2mm.
Optionally, described iron core being additionally provided with axis hole, described axis hole is positioned at the center of described iron core.
Optionally, also include that said two end plate is respectively arranged at institute for two end plates preventing described Magnet from dropping out
State the two ends of iron core.
Optionally, described iron core being additionally provided with the rivet hole for fixing described end plate, described rivet hole is around described axle
Hole is equidistantly distributed.
Optionally, the quantity of described Magnet is at least two.
Optionally, described Magnet is ferrite magnet.
Optionally, described iron core is got up to form by some silicon steel sheet stack rivetings.
This motor rotor construction is mainly used in the motor of compressor, by designing the magnet arrangement of not uniform thickness, makes Magnet
Producing magnetomotive force centre position maximum, two ends are minimum, gradually reduce to two ends from centre position, then the no-load back electromotive force produced
Waveform sine is good, is conducive to reducing total harmonic component, thus improves the performance of motor, reduces the noise of motor；On the other hand,
By arranging trimming on Magnet, solve Magnet orientation problem in the course of processing, Magnet two ends can also be reduced simultaneously
Leakage field.
Accompanying drawing explanation
Fig. 1 is the generalized section of existing frequency conversion motor；
Fig. 2 is the generalized section of the frequency conversion motor of the application one embodiment；
Fig. 3 is the generalized section of the motor rotor construction of the application one embodiment, has wherein 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 generalized section of single Magnet in the frequency conversion motor applying for an embodiment.
In figure: 1-stator；2-rotor；21-Magnet；22-iron core；221-Magnet groove；2211-is every magnetic magnetic bridge；222-rivet
Hole；223-axis hole.
Detailed description of the invention
The core concept of the application is the Magnet 21 in rotor 2 is designed to not wait thick structure, and thickness is from centre gradually
Be gradually reduced to two ends, then Magnet 21 is gradually reduced to the magnetomotive force at two ends from centre along polar arc, 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 produces is good, is conducive to reducing total harmonic component.Need
To illustrate that thickness referred herein refers to the thickness of magnet cross section.
The motor rotor construction proposed the present invention below in conjunction with the drawings and specific embodiments is described in further detail.Root
According to following explanation and claims, advantages and features of the invention will be apparent from.It should be noted that, accompanying drawing all uses the simplest
The form changed and all use non-ratio accurately, only in order to convenient, aid in illustrating the purpose of the embodiment of the present invention lucidly.
Refering to Fig. 2 and Fig. 3, shown in it is generalized section and the rotor knot of the frequency conversion motor of the present embodiment respectively
The generalized section of structure, wherein Fig. 3 is the rotor part of Fig. 2.
Frequency conversion motor mainly includes stator 1 and rotor 2, and 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 it is the silicon steel of 0.35mm that iron core 22 is usually by thickness
Sheet folded riveting after punching press is got up, and composition has certain thickness iron core 22, and iron core 22 generally comprises Magnet groove 221, rivet hole
222, the structure such as axis hole 223, in order to reduce the leakage field problem at Magnet 21 two ends, separately designs class triangle at Magnet groove 221 two ends
Shape every magnetic magnetic bridge 2211.Axis hole 223 is assembled together with compressor crank shaft, is namely 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 the preferably quantity of Magnet 21 is four, six or eight.For
Facilitating explanation, be provided with four Magnet 21 in 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 iron core 22 two ends
Drop out.End plate one end or two ends the most also placed similar balance weight (not shown), iron core 22, end plate, balance weight
Use rivet to rivet after running through, thus ensure that iron core 22, end plate, balance weight are fixed together, and Magnet 21 is at end plate
Do not fall out out under stop.
Refering to Fig. 4 and Fig. 6, shown in it is partial enlarged drawing and the generalized section of single Magnet 21 of Fig. 3 respectively.Under
Face combines the two accompanying drawing and the structure of a lower magnet 21 is discussed in detail.
Magnet 21 be designed to not wait thick structure, Magnet 21 be shaped as cylinder, the thickness of the cross section of cylinder is by interposition
Put and be gradually reduced to two ends, then Magnet 21 is gradually reduced to the magnetomotive force at two ends from centrally along polar arc, in the middle of such magnetomotive force
Greatly, gradually reducing to both sides, two ends are minimum.
It is also preferred that the left the cross section of Magnet 21 approximates in crescent, two ends are thin, thick middle, and along intermediate symmetry.Say for convenience
Bright, the cross section of cylinder includes the first end, the second end and centre position.Fig. 5 has marked the first end, the second end and centre respectively
The thickness of position, when Magnet 21 two-end thickness relative intermediate position thickness ratio 0.125～0.450, the harmonic wave of counter electromotive force
Component is minimum, and sine is best, it may be assumed that
As H2=H3 andTime, back emf waveform harmonic component is minimum.
Wherein, H2 and H3 represents thickness and the thickness of described second end of described first end respectively, and H1 represents centre position
Thickness.
It is also preferred that the left Magnet 21 is ferrite magnet.
Processing Magnet 21, has separately designed two trimmings at the two ends of Magnet 21 for convenience, at processing Magnet 21
Time convenient location.Fig. 4 marks the length of two trimmings, has represented with L1, L2 respectively, and L1=0.1mm～2mm, L2=
0.1mm～2mm.
The motor rotor construction that the application provides has the advantages that this motor rotor construction is mainly used in compressor
Motor in, by designing the magnet arrangement of not uniform thickness, make Magnet 21 produce magnetomotive force centre position maximum, 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,
Thus improve the performance of motor, reduce the noise of motor；On the other hand, by arranging trimming on Magnet, solve Magnet and exist
Orientation problem in the course of processing, can also reduce the leakage field at Magnet two ends simultaneously.
Foregoing description is only the description to present pre-ferred embodiments, not any restriction to the scope of the invention, this
Any change that the those of ordinary skill in bright field does according to the disclosure above content, modification, belong to the protection of claims
Scope.
Claims (11)
1. a motor rotor construction, it is characterised in that include iron core and the some Magnet being arranged on described iron core；
Described Magnet be shaped as cylinder, the thickness of the cross section of described cylinder is gradually reduced to two ends by centre position.
2. motor rotor construction as claimed in claim 1, it is characterised in that described two ends include the first end and the second end, institute
The relation of the thickness stating the thickness of the first end, the thickness in described centre position and described second end is as follows:
H2=H3, and
Wherein, H2 and H3 represents thickness and the thickness of described second end of described first end respectively, and H1 represents the thickness in centre position
Degree.
3. motor rotor construction as claimed in claim 1, it is characterised in that be provided with several Magnet grooves on described iron core,
Several Magnet grooves described are equidistantly distributed around the center of described iron core, arrange a Magnet in each Magnet groove.
4. motor rotor construction as claimed in claim 3, it is characterised in that be provided with for reducing magnetic on each Magnet groove
Ferrum leakage field every magnetic magnetic bridge, the described outside being positioned at described Magnet every magnetic magnetic bridge.
5. motor rotor construction as claimed in claim 1, it is characterised in that the two ends of the cross section of described cylinder all include two
Individual trimming, the length range of each trimming is 0.1mm～2mm.
6. motor rotor construction as claimed in claim 1, it is characterised in that be additionally provided with axis hole, described axle on described iron core
Hole is positioned at the center of described iron core.
7. motor rotor construction as claimed in claim 6, it is characterised in that also include for prevent described Magnet from dropping out two
Individual end plate, said two end plate is respectively arranged at the two ends of described iron core.
8. motor rotor construction as claimed in claim 7, it is characterised in that be additionally provided with on described iron core for fixing described
The rivet hole of end plate, described rivet hole is equidistantly distributed around described axis hole.
9. motor rotor construction as claimed in claim 1, it is characterised in that the quantity of described Magnet is at least two.
10. motor rotor construction as claimed in claim 1, it is characterised in that described Magnet is ferrite magnet.
11. motor rotor constructions as claimed in claim 1, it is characterised in that described iron core is got up by some silicon steel sheet stack rivetings
Composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610916614.3A CN106300738A (en) | 2016-10-20 | 2016-10-20 | A kind of motor rotor construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610916614.3A CN106300738A (en) | 2016-10-20 | 2016-10-20 | A kind of motor rotor construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106300738A true CN106300738A (en) | 2017-01-04 |
Family
ID=57719023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610916614.3A Pending CN106300738A (en) | 2016-10-20 | 2016-10-20 | A kind of motor rotor construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106300738A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10201151A (en) * | 1997-01-13 | 1998-07-31 | Aichi Emerson Electric Co Ltd | Rotor for electric motor |
| JP2000166144A (en) * | 1998-11-26 | 2000-06-16 | Mitsubishi Heavy Ind Ltd | Magnet motor and compressor |
| CN101536293A (en) * | 2007-02-21 | 2009-09-16 | 三菱电机株式会社 | Permanent magnet synchronous motor and enclosed compressor |
| CN102780291A (en) * | 2011-08-05 | 2012-11-14 | 珠海格力电器股份有限公司 | Electromotor rotor and electromotor with same |
| CN206481124U (en) * | 2016-10-20 | 2017-09-08 | 上海日立电器有限公司 | A kind of motor rotor construction |
-
2016
- 2016-10-20 CN CN201610916614.3A patent/CN106300738A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10201151A (en) * | 1997-01-13 | 1998-07-31 | Aichi Emerson Electric Co Ltd | Rotor for electric motor |
| JP2000166144A (en) * | 1998-11-26 | 2000-06-16 | Mitsubishi Heavy Ind Ltd | Magnet motor and compressor |
| CN101536293A (en) * | 2007-02-21 | 2009-09-16 | 三菱电机株式会社 | Permanent magnet synchronous motor and enclosed compressor |
| CN102780291A (en) * | 2011-08-05 | 2012-11-14 | 珠海格力电器股份有限公司 | Electromotor rotor and electromotor with same |
| CN206481124U (en) * | 2016-10-20 | 2017-09-08 | 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 |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information |
Address after: 201206 Pudong New Area Jinqiao Ning Road, Shanghai, No. 888 Applicant after: Shanghai Haili Electrical Appliance Co. Ltd. Address before: 201206 Pudong New Area Jinqiao Ning Road, Shanghai, No. 888 Applicant before: Rili Electric Appliance Co., Ltd., Shanghai |
|
| CB02 | Change of applicant information | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |