CN1234200C - Rotor of squirrel-cage induction motor and making method threrof - Google Patents
Rotor of squirrel-cage induction motor and making method threrof Download PDFInfo
- Publication number
- CN1234200C CN1234200C CN 02116624 CN02116624A CN1234200C CN 1234200 C CN1234200 C CN 1234200C CN 02116624 CN02116624 CN 02116624 CN 02116624 A CN02116624 A CN 02116624A CN 1234200 C CN1234200 C CN 1234200C
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- rotor
- copper powders
- conductor
- induction motor
- stage
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- Expired - Fee Related
Links
- 230000006698 induction Effects 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000000843 powder Substances 0.000 claims abstract description 53
- 239000004020 conductor Substances 0.000 claims abstract description 46
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 34
- 238000004512 die casting Methods 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 12
- 238000000576 coating method Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims description 49
- 239000010949 copper Substances 0.000 claims description 49
- 239000004411 aluminium Substances 0.000 claims description 32
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000004080 punching Methods 0.000 claims description 8
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 7
- 238000003487 electrochemical reaction Methods 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 238000003475 lamination Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 4
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000011247 coating layer Substances 0.000 abstract 1
- 230000005291 magnetic effect Effects 0.000 description 7
- 230000004927 fusion Effects 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000010010 raising Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Manufacture Of Motors, Generators (AREA)
- Induction Machinery (AREA)
Abstract
The present invention discloses a rotor of a squirrel-cage induction motor and a making method thereof. The present invention is mainly characterized in that a rotor conductor of an induction motor die-casts aluminum powder mixed with copper powder into the rotor slot in a die-casting method; end rings on both ends of a rotor core is formed by die-casting the aluminum powder mixed with the copper powder. In order to manufacture the rotor, the present invention has the manufacturing method that the aluminum powder mixed with the copper powder is filled in the rotor core through putting the rotor core in the mould in the die-casting stage, and the conductor powder formed by evenly mixing the aluminum powder and the copper powder is poured in the rotor slot and both of the two ends of the rotor core for heating or pressurizing so as to form the end rings mixed with the copper powder and the rotor conductor. The coating stage is carried out before the die-casting stage, namely that the copper powder is provided with a coating layer. The rotor of a squirrel-cage induction motor of the present invention has the effects that the rotor of a squirrel-cage induction motor reduces resistance of the rotor conductor and enhances performance of the induction motor since the rotor conductor is formed by mixing aluminum and copper powder of which the electric conductivity is higher than the aluminum.
Description
Technical field
The present invention relates to a kind of invention, particularly a kind of rotor of cage type induction motor and manufacture method thereof about the induction machine aspect.
Background technology
In general, motor is to convert electric energy to the machine that mechanical energy is obtained rotary power, be divided into direct current machine and alternating current machine substantially, and induction machine belongs to a kind of of alternating current machine.
Induction machine is made of stator and rotor, and the rotating magnetic field that the stator coil upper reaches produces when alternating current is arranged makes rotor produce moment of torsion, makes the motor rotation.Described induction machine is divided into cage type induction motor and coil type induction machine according to the coil shape of rotor.Wherein the rotor coil of cage type induction motor is that ring clavate by copper or aluminium etc. becomes rotor conductor, and the epitrochanterian coil of coil type induction machine is identical with the coil associated methods of stator.
Below with reference to back accompanying drawing paper, the cage rotor structure is carried out simple explanation.
Shown in Fig. 1 a, Fig. 1 b, the rotor of described cage type induction motor is made up of rotor conductor 31 and rotor core 10.The electric current that described rotor conductor 31 is inducted by stator coil (not expressing among the figure) and the interaction of magnetic flux produce moment of torsion, described rotor core 10 is the magnetics that form magnetic flux, circular silicon steel plate 10a neighboring forms actiniform a plurality of rotor 13, described rotor core 10 is formed along the direction of principal axis stack by a plurality of silicon steel plate 10a, make rotor 13 alignment, be inserted with metals such as the aluminium that conducts electricity very well or copper on the described rotor 13, form rotor conductor 31.Have on the two ends of described in addition rotor conductor 31 and link the end ring 33 that rotor conductor forms a loop.At this moment described rotor conductor 31 and the end ring 33 general aluminium pressure casting methods that are extensive use of are processed.
Rotor with cage type induction motor of said structure interacts by induced current and the magnetic flux that described rotor conductor 31 produces, and right-hand rule produces moment of torsion.But in order to improve the performance of cage type induction motor, the resistance of rotor conductor 31 must be little.But the conductance that is applicable to described rotor conductor 31 is limited, so the problem that has caused the induction machine characteristic to reduce.
Summary of the invention
Technical problem to be solved by this invention is by to the rotor of cage type induction motor and the improvement of manufacture method thereof, and rotor conductor adopts and contains the high copper powders may of conductance, thereby reaches the purpose that has improved motor properties.
To achieve these goals, the technical solution used in the present invention provides a kind of rotor of cage type induction motor, comprise rotor core, rotor conductor and end ring, rotor core is the steel plate stack that has a plurality of rotor at interval by having radiation, and the rotor of described steel plate formed along the direction of principal axis alignment, rotor conductor is that the method by die casting will be mixed with the aluminium powder die casting of copper powders may in described rotor, end ring on described rotor core two ends is to be made by the aluminium powder die casting that is mixed with copper powders may, and wherein: the copper powders may in the described rotor conductor is provided with the layer that prevents electrochemical reaction between copper powders may and the aluminium powder.
The electrochemical reaction coat that prevents between described copper powders may and the aluminium powder is the nickel coat film.A kind of manufacture method of making the rotor of the described cage type induction motor of claim 1 also is provided, and its method may further comprise the steps:
It at first is the punching press stage: utilize diel that silicon steel sheet is stamped out and be pressed into mouth and rotor; The process coating stage: on copper powders may, scribble coat;
Enter the die casting stage: rotor core is put into mould, heat-treat,, recover electrical characteristics simultaneously to eliminate mechanical stress for the steel plate after the punching press; Be the lamination stage then: rotor is alignd along direction of principal axis, make rotor core;
Enter the die casting stage: rotor core is put into mould, then copper powders may and aluminium powder are evenly mixed, pour the two ends of rotor and rotor core into; Pressurization or the temperature between aluminium fusing point and copper fusing point heat then, form the rotor conductor and the end ring that are mixed with copper powders may.
To pass through the coating stage before carrying out the die casting stage described, that is, on copper powders may, scribble coat.
The rotor of the cage type induction motor of the present invention extremely effect that can bring of manufacture method is because rotor conductor is mixed by aluminium and the copper powders may higher than aluminium conductance forms, and has reduced the resistance of conductor, has improved the performance of induction machine.
Description of drawings
Fig. 1 a is the rotor structure drawing in side sectional elevation of general cage type induction motor;
Fig. 1 b is the rotor structure sectional arrangement drawing of general cage type induction motor;
Fig. 2 is the rotor structure sectional arrangement drawing of cage type induction motor of the present invention;
Fig. 3 is the flow chart of the rotor manufacture process of cage type induction motor of the present invention.
Among the figure:
10: rotor core 10a: steel plate
13: rotor 20: axle
31: rotor conductor 33: end ring
40: copper powders may 50: electrodeposited coating
Embodiment
The present invention will be described in more detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 2, cage type induction motor of the present invention has following structure, and described cage type induction motor is made of stator (not expressing in the drawing), rotor, axle substantially.Described rotor and described stator constitute concentric circles, with the inner peripheral maintenance certain interval of stator.Described axle is pressed into described centre of rotor portion, and the revolving force of rotor is passed on the driven shaft.Described rotor is made up of rotor core 10, rotor conductor 31 and end ring 33.Steel plate 10a goes up and is formed with a plurality of rotor 13 according to specific interval radiation ground, and the rotor 13 of described steel plate 10a is alignd along direction of principal axis, and lamination forms rotor core 10.Described rotor conductor 31 is arranged in the described rotor 13, and the induced current and the magnetic flux interaction that produce by stator coil produce moment of torsion.Have on the two ends of described rotor core and link the end ring 33 that rotor conductor forms a loop.
Though do not express in detail in the drawing, constitute to be formed with on the steel plate 10a of described rotor core and be pressed into mouthful and a plurality of rotor 13.The described silicon steel plate central part that is pressed into interruption-forming in circle is used for insertion axle 20 is set; With the described a plurality of rotor 13 that are formed centrally reflection in mouthful being that are pressed into; Be arranged on the form that the rotor conductor 31 in the described rotor is mixed by aluminium and a large amount of copper powders may 40.The reason that is mixed with copper powders may 40 in the described rotor conductor 31 is the conductance height of the conductance of copper than aluminium, can reduce conductor resistance significantly.So the induced current that produces in described conductor because resistance is little, produces bigger moment of torsion with the rotating magnetic field interaction.Wherein, the amount of copper powders may 40 is big more, and is favourable more to improving motor properties.
Described end ring 33 preferably adopts the identical materials composition with described rotor conductor 31, certainly, also can adopt aluminium powder.But described end ring also can produce conductor resistance, so adopt and rotor conductor 31 identical materials compositions, that is, it is more favourable to mix 40 pairs of raisings of a large amount of copper powders may motor performance aspect.
In these cases,, reduced the resistance of rotor conductor, improved the performance of rotor, formed high-resistance electrochemical reaction layer between described copper powders may 40 and the aluminium though be mixed with copper powders may in the rotor conductor 31.The path of this conversion zone left and right sides secondary current, final secondary current concentrates on end ring and combines a certain preferably side, might reduce the characteristic of motor on the contrary.In order to address the above problem, the present invention forms electropaining layer 50 on the interface between described copper powders may 40 and the aluminium.Described electropaining layer 50 is the nickel coat films that are coated in copper powders may 40 outsides, prevents to produce electrochemical reaction layer between copper and the aluminium.
Below the manufacturing process of cage type induction motor with said structure is carried out simple explanation.
Fig. 3 is the flow chart of the rotor manufacture process of cage type induction motor of the present invention.It at first is punching press stage (the S10 stage): utilize diel that thin silicon steel plate 10a is stamped out and be pressed into mouth and rotor 13.The described mouthful central part that is positioned at thin silicon steel plate 10a that is pressed into is used to be pressed into axle.Described rotor 13 forms according to the radiation punching press at peripheral edge side.
Heat treatment stages (S20 stage): in the described punching press stage, described steel plate 10a is not only remaining mechanical stresses such as distortion, and electric characteristics liquid is destroyed.In order to address the above problem, heat-treat for the steel plate 10a after the punching press, remove mechanical stress and recover electrical characteristics simultaneously.
The lamination stage (S30 stage): along the direction of principal axis alignment, the method for utilization welding is fixed or is utilized lining, clip to fix and make rotor core 10 with rotor 13.The described lamination stage also can be placed on before the heat treatment stages.
The die casting stage (S50 stage): finish by said process after the making of rotor core 10, form rotor conductor 31 and end ring 33 by described rotor 13.The die casting stage (S50 stage) can finish by following two kinds of methods:
At first the die casting stage (S50 stage) to first example of the present invention describes.Described rotor core 10 is put into mould; Then aluminium powder and copper powders may 40 are poured into the two ends of rotor 13 and rotor core according to the mixed uniformly conductor powder of proper proportion; Heat in suitable temperature then.Formation is mixed with the rotor conductor and the end ring of copper powders may.Should be to the temperature that applies on the described rotor core 10 in the temperature between aluminium fusion point and the copper fusion point.This is because the fusion point of aluminium is lower than the fusion point of copper, so aluminium forms rotor conductor 31 and end ring 33 with liquid condition along the shape of mould, copper still is in pulverulence.In described aluminium fused solution solidified, on the position that forms described rotor conductor and end ring, forming with aluminium was principal component and the rotor conductor 31 that is mixed with copper powders may and end ring 33.
Then, the die casting stage (S50 stage) to second example of the present invention describes.Described rotor core 10 is put into mould; The aluminium fused solution that is mixed with copper powders may 40 is injected the two ends of rotor 13 and rotor core; Pressurization formation is principal component and the rotor conductor 31 that is mixed with copper powders may and end ring 33 with aluminium then.The temperature requirement of described aluminium fused solution is lower than the fusion point of copper.
Explanation to coating stage (the S40 stage): in order effectively to remove the electrochemical reaction layer between described copper powders may 40 and the aluminium, the described die casting stage (S50 stage) before, should on copper powders may, form electrodeposited coating.That is to say, in the described coating stage (S40 stage), the copper powders may before the die casting is immersed in the nickel coating liquid that making the outside formation of described copper powders may is the electrodeposited coating of principal component with nickel.
Claims (4)
1, a kind of rotor of cage type induction motor, comprise rotor core, rotor conductor and end ring, rotor core is the steel plate stack that has a plurality of rotor at interval by having radiation, and the rotor of described steel plate formed along the direction of principal axis alignment, rotor conductor is that the method by die casting will be mixed with the aluminium powder die casting of copper powders may in described rotor, end ring on described rotor core two ends is to be made by the aluminium powder die casting that is mixed with copper powders may, it is characterized in that:
Copper powders may in the described rotor conductor is provided with the coat that prevents electrochemical reaction between copper powders may and the aluminium powder.
2, the rotor of cage type induction motor according to claim 1 is characterized in that: the electrochemical reaction coat that prevents between described copper powders may and the aluminium powder is the nickel coat film.
3, a kind of manufacture method of making the rotor of cage type induction motor, its method may further comprise the steps:
It at first is the punching press stage: utilize diel that silicon steel sheet is stamped out and be pressed into mouth and rotor;
Be heat treatment stages then: heat-treat for the steel plate after the punching press,, recover electrical characteristics simultaneously to eliminate mechanical stress; Be the lamination stage then: rotor is alignd along direction of principal axis, make rotor core;
The process coating stage: on copper powders may, scribble coat;
Enter the die casting stage: rotor core is put into mould, then copper powders may and aluminium powder are evenly mixed, pour the two ends of rotor and rotor core into; Pressurization or the temperature between aluminium fusing point and copper fusing point heat then, form the rotor conductor and the end ring that are mixed with copper powders may.
4, manufacture method according to claim 3 is characterized in that: the copper powders may before the die casting is immersed in the nickel coating liquid, and making the outside formation of described copper powders may is the electrodeposited coating of principal component with nickel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02116624 CN1234200C (en) | 2002-04-15 | 2002-04-15 | Rotor of squirrel-cage induction motor and making method threrof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02116624 CN1234200C (en) | 2002-04-15 | 2002-04-15 | Rotor of squirrel-cage induction motor and making method threrof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1452293A CN1452293A (en) | 2003-10-29 |
| CN1234200C true CN1234200C (en) | 2005-12-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02116624 Expired - Fee Related CN1234200C (en) | 2002-04-15 | 2002-04-15 | Rotor of squirrel-cage induction motor and making method threrof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1234200C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010021470A1 (en) * | 2010-05-25 | 2011-12-01 | Siemens Aktiengesellschaft | Squirrel cage rotor for an asynchronous machine and method of manufacturing the squirrel cage rotor |
| JP5602968B1 (en) * | 2013-03-27 | 2014-10-08 | ファナック株式会社 | Cage rotor and electric motor including cage rotor |
| CN103887934B (en) * | 2014-04-24 | 2016-08-17 | 洛阳轴研科技股份有限公司 | A kind of method for fine finishing of electro spindle cage rotor |
| EP3382864A1 (en) * | 2017-03-29 | 2018-10-03 | Siemens Aktiengesellschaft | Hybrid cage rotor |
| CN110504802B (en) * | 2018-05-16 | 2021-05-04 | 高力热处理工业股份有限公司 | Method for manufacturing motor rotor and motor rotor |
-
2002
- 2002-04-15 CN CN 02116624 patent/CN1234200C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1452293A (en) | 2003-10-29 |
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