CN105490400A - Axial magnetic field amorphous or nanocrystalline motor stator core and manufacturing method therefor - Google Patents
Axial magnetic field amorphous or nanocrystalline motor stator core and manufacturing method therefor Download PDFInfo
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- CN105490400A CN105490400A CN201510964663.XA CN201510964663A CN105490400A CN 105490400 A CN105490400 A CN 105490400A CN 201510964663 A CN201510964663 A CN 201510964663A CN 105490400 A CN105490400 A CN 105490400A
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- 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
- H02K1/12—Stationary parts of the magnetic circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
Abstract
The invention discloses an axial magnetic field amorphous or nanocrystalline motor stator core and a manufacturing method therefor. The manufacturing method comprises the following steps of coiling an annular part, wherein alloy strip is coiled to form the annular part with predetermined inner diameter and outer diameter; uniformly coating one surface of the alloy strip not coiled with a layer of binder along with the coiling process so as to glue an adjacent alloy strip layer for forming the annular part; performing curing processing; cutting a concave part and performing annealing. The amorphous or nanocrystalline motor stator core manufactured by the method is excellent in soft magnetic property and high in bonding strength; and in addition, the manufacturing method is simple in production process and low in manufacturing cost.
Description
Technical field
The invention belongs to the magnetic circuit part field of motor, be specifically related to a kind of motor in axial magnetic field amorphous, nanocrystalline alloy stator iron core and manufacture method thereof, this kind of stator core is especially applicable to being applied to and requires energy-efficient high frequency motor in axial magnetic field.
Background technology
Because high frequency can bring the advantages such as high rotating speed, high power density and high torque density to motor, become the development trend of motor at present.Numerous high-end applications fields such as electric automobile, high-speed machine tool, high-speed fan, high-speed water, not only require that motor has high efficiency, also require that motor is to high frequency, miniaturization, so must improve electric machine frequency.But the silicon steel core of conventional motors increases sharply along with the rising iron loss of frequency, seriously reduce electric efficiency, even seriously cause normally working owing to generating heat.Amorphous, nanometer crystal alloy soft magnetic material have the characteristic such as low-loss, high magnetic permeability, are expected to substituted for silicon Steel material and are applied to high-frequency electric machines stator core, and then increase substantially high-frequency electric machines performance.
Amorphous, nanometer crystal alloy band are generally have constant width, length direction continuous print thin-band material, instant rolled winding forming; And the trench structure of axial magnetic field iron core is simply convenient to processing.So amorphous, nanometer crystal alloy band are applied to motor in axial magnetic field stator core and have more advantage.
1998, after the patent US005731649A of LE company of the U.S. has attempted using winding, the amorphous block of dipping lacquer curing molding is combined into motor stator core, owing to directly using the teeth portion of amorphous cylinder as stator core of winding, the vortex current of core interior forms loop, causes iron loss larger.
2006, LE company disclosed a kind of shaping method of dipping lacquer Post RDBMS that first uses and produces annular amorphous alloy iron core in patent US7018498B2, then makes the method for amorphous alloy stator iron core at a face milling axial notch.Owing to carrying out dipping lacquer to the amorphous nano-crystalline annular core obtained that reels, especially when axial length is larger, be difficult to interlayer gap resin being immersed in completely amorphous, nanocrystalline annular core, cause iron core layer insulation poor effect, adhesive strength inadequate, easily cracked during grooving, affect performance and rate of finished products; In order to the interlayer gap making resin immerse iron core more fully, during Wound core, lamination coefficient is general lower, controls 0.75 ~ 0.85, therefore affects the power density of motor.This invention Pocket Machining adopts milling method, and there is dentalation on milling cutter surface, and amorphous, nanocrystalline iron core are more crisp again, so be difficult to the tangent plane fineness ensureing iron core slot, affect performance.
2010, also a kind of manufacture method of motor in axial magnetic field amorphous alloy stator iron core is disclosed in the patent CN101741153A of Amada Co., Ltd., first the shaping method of dipping lacquer Post RDBMS is used to produce annular amorphous alloy iron core, then cut into multiple shape and the identical bar-shaped non-crystal block of size vertically, re-use discoid iron core holding member and these bar-shaped non-crystal blocks are combined into stator core.Also be dipping lacquer curing molding after first reeling during the method making amorphous alloy stator iron core, under there is high lamination coefficient equally, resin is difficult to soak into completely, affects the problem of insulation effect and adhesion strength.So after winding annular core, the method for dipping lacquer solidification is difficult to the axial magnetic field amorphous stator core making high lamination coefficient, and the both ends of the surface that especially axial length is larger have the amorphous of groove structure, nanocrystalline stator core.
In sum, the making of existing axial magnetic field Amorphous Metal Motor iron core all adopts the method for dipping lacquer curing molding cut-in groove again after winding.The method makes axial magnetic field amorphous, nanocrystalline iron core, and in order to ensure that the gap between core interior amorphous or nanocrystalline strip can more fully by resin impregnated, lamination coefficient, generally about 0.80, affects the power density of workpiece.If improve lamination coefficient, especially for the iron core that axial length is larger, the abundant dipping lacquer in core interior band gap cannot be ensured, will cause that layer insulation is not good, adhesion strength inadequate, and affect performance and cut rate of finished products.
Summary of the invention
In order to solve the above problem existed in prior art, the invention provides a kind of axial magnetic field amorphous, nanocrystalline motor stator core and manufacture method thereof.High-performance motor in axial magnetic field amorphous, nanocrystalline alloy stator iron core to make annular core, are produced with high speed grinding wheel cut-in groove after curing molding again at amorphous or nanocrystalline strip surface spraying binding agent in winding limit, the method limit.Not only soft magnet performance is excellent for the amorphous that the method manufactures, nanocrystalline alloy stator iron core, adhesive strength is high, and production technology is simple, low cost of manufacture.
To achieve these goals, present invention employs following technical scheme:
A kind of axial magnetic field amorphous, nanocrystalline motor stator core, described iron core is the torus of amorphous or nanometer crystal alloy band multilayer-wound, described toric above and/or under end face is evenly distributed with multiple recess, formed between described toric adjacent amorphous or nanometer crystal alloy tape layer with tack coat.
In above-mentioned axial magnetic field amorphous, nanocrystalline motor stator core, as a kind of preferred implementation, the material of described amorphous or nanometer crystal alloy band is ferrous alloy, iron nickel base alloy or cobalt-base alloys.
In above-mentioned axial magnetic field amorphous, nanocrystalline motor stator core, as a kind of preferred implementation, the horizontal center line being positioned at the described multiple recess on same end face all intersects at same point with the central axis upright of described iron core.
In above-mentioned axial magnetic field amorphous, nanocrystalline motor stator core, as a kind of preferred implementation, when described toric upper and lower end face is distributed with recess, the vertical center line being positioned at the recess of described upper surface overlaps with the vertical center line of the recess being correspondingly positioned at lower surface.
In above-mentioned axial magnetic field amorphous, nanocrystalline motor stator core, as a kind of preferred implementation, the thickness of described tack coat is 1-2 μm.
In above-mentioned axial magnetic field amorphous, nanocrystalline motor stator core, as a kind of preferred implementation, the shape of described recess is rectangle.
The manufacture method of above-mentioned axial magnetic field amorphous, nanocrystalline motor stator core, comprises the steps:
Winding annular element step, use amorphous or nanometer crystal alloy band that width is identical with the axial length of finished product stator core, described alloy strip steel rolled stock is carried out reel to be formed the annular element with pre-determined inner diameter and external diameter, wherein, along with the carrying out of winding, even application one layer binder on a surface of the described alloy strip steel rolled stock constantly before winding, with the adjacent alloys tape layer forming described annular element that bonds;
Solidification treatment step, is cured process by described annular element, thus obtains the annular element after solidifying;
Recess cutting step, immerses the annular element after described solidification in cooling fluid, uses high speed grinding wheel, above and/or under described annular element, end face carries out recess cutting, thus obtains the annular core with recess structure;
Annealing steps, carries out annealing in process to the described annular core with recess structure, thus obtains finished product motor stator core.
In above-mentioned manufacture method, when reeling described annular element, operable amorphous, a nanocrystalline strip reel, and also can use plural amorphous simultaneously, nanocrystalline strip reels.
In above-mentioned manufacture method, the binding agent being sprayed at (namely between tape layer) between described adjacent two layers alloy strip steel rolled stock must can bear the annealing temperature of more than 370 DEG C, described binding agent can be organic binder bond also can be inorganic binder, preferably, described organic binder bond is silicone based glue, phenolic resin glue, urea-formaldehyde resin adhesive, heatproof epoxy glue, polyimides glue, the inorganic binder that described inorganic binder is TW series, SL is serial or ZS is serial.
In above-mentioned manufacture method, the thickness of a layer binder of described spraying is preferably 1-2 μm.
In above-mentioned manufacture method, as a kind of preferred implementation, in described winding annular element step, tension force when reeling by improving on band improves the lamination coefficient of described finished product motor stator core, and described lamination coefficient is 0.85-0.95.
In above-mentioned manufacture method, as a kind of preferred implementation, in described solidification treatment step, the temperature of described solidification process is 90-300 DEG C.
In above-mentioned manufacture method, as a kind of preferred implementation, in described recess cutting step, during cutting, the rotating speed of described emery wheel is 10000-35000 rev/min, and described emery wheel is placed in cooling fluid completely.More preferably, described cooling fluid is pure water, water base cooling fluid or oil base cooling fluid.
In above-mentioned manufacture method, as a kind of preferred implementation, the thickness of described emery wheel is consistent with recess well width.
In above-mentioned manufacture method, as a kind of preferred implementation, in described annealing steps, described annealing in process is carried out under nitrogen, hydrogen or inert gas (preferred argon gas) protective atmosphere.
In above-mentioned manufacture method, as a kind of preferred implementation, in described annealing steps, the temperature of described annealing in process is 300-600 DEG C, and temperature retention time is 0.5-5.0h.
Have high lamination coefficient and low core loss according to the stator core of the inventive method manufacture, be applicable to being applied to the high-frequency electric machines of frequency at more than 400Hz, and frequency is higher, the energy-saving effect of motor is more remarkable.Especially, when frequency reaches more than 800Hz, the motor than use ordinary silicon steel core is improved 3-10% by electric efficiency.In addition, simple, the low cost of manufacture of this production technology.
Accompanying drawing explanation
Fig. 1 is that use of the present invention has the amorphous of one fixed width, nanometer crystal alloy thin coiled stock around having the annular amorphous of predetermined internal-and external diameter, the process schematic of nanometer crystal alloy annular element;
Fig. 2 be use of the present invention have the amorphous of one fixed width, nanometer crystal alloy thin coiled stock around there is the annular amorphous of predetermined internal-and external diameter, the schematic diagram of nanometer crystal alloy annular element;
Fig. 3 is the schematic diagram of use emery wheel cutting mode of the present invention to the cutting bin used when annular amorphous, nanometer crystal alloy annular element end face grooving;
Fig. 4 is that the emery wheel cutting mode that uses in cutting bin of the present invention is to the process schematic of annular amorphous, nanometer crystal alloy annular element end face grooving;
Fig. 5 be use high speed grinding wheel cutting mode of the present invention two axial ends of annular element all slot obtain axial magnetic field amorphous, nano-crystalline alloy iron core schematic diagram;
Fig. 6 be use high speed grinding wheel cutting mode of the present invention an axial end of annular element slot obtain axial magnetic field amorphous, nano-crystalline alloy iron core schematic diagram.
Wherein, Reference numeral is as follows:
1, there is the amorphous of one fixed width, nanocrystalline alloy strip material webs;
2, at the shower nozzle of strip surface spraying adhesive in the annular core process that reels;
3, reel the amorphous with certain internal-and external diameter, the nanocrystalline annular element obtained;
4, the cutting bin used during emery wheel cut-in groove; 5, the locating cylinder bottom cutting bin;
6, the cooling fluid used during cut-in groove; 7, the emery wheel saw blade used during cut-in groove;
8, the groove of axial magnetic field amorphous alloy stator iron core annular end face;
9, the tooth of axial magnetic field amorphous alloy stator iron core annular end;
10, two annular end faces all have the amorphous of axial notch structure, nanocrystalline iron core;
11, an annular end face all has the amorphous of axial notch structure, nanocrystalline iron core.
Embodiment
In order to explain the present invention better, come below with reference to accompanying drawings to describe fully according to axial magnetic field stator core of the present invention and manufacture method thereof.
With reference to Fig. 5 and 6, it is two kinds of axial magnetic field amorphous provided by the invention, nanocrystalline motor stator core, described iron core is the torus of amorphous or nanometer crystal alloy band multilayer-wound, described toric above and/or under end face is evenly distributed with multiple recess, formed between described toric adjacent amorphous or nanometer crystal alloy tape layer with tack coat.
The material of described amorphous or nanometer crystal alloy band can be the alloy that this area is commonly used, and is preferably ferrous alloy, iron nickel base alloy or cobalt-base alloys, and it can adopt conventional getting rid of to be with legal system standby, also can be obtained by commercially available channel.
The horizontal center line being positioned at the described multiple recess on same end face all intersects at same point with the central axis upright of described iron core.Teeth portion is between two adjacent recesses on same end face.Described multiple recess all has identical size and shape.If both ends of the surface all offer recess, then the recess size of two end faces, shape are all identical.The vertical center line of two recesses that upper and lower both ends of the surface are corresponding should be overlap, and namely when described toric upper and lower end face is distributed with recess, the recess being positioned at described upper surface is relative one by one with the recess being positioned at lower surface.The shape of described recess can be that any shape used in iron core is commonly used in this area, and preferred recess is rectangular recess.
The thickness of described tack coat is even, and be preferably 1-2 μm, the tack coat of this thickness and insulating barrier both can ensure adhesion strength, can prevent again that tack coat is blocked up affects core lamination stack coefficient.
In the prior art, for the making of axial magnetic field Amorphous Metal Motor iron core, after usually adopting winding annular core, dipping lacquer solidifies the method for cut-in groove again.But if when the lamination coefficient of Wound core is higher, binding agent is difficult to the interlayer gap being fully immersed in iron core, cause that adhesion strength is not high, layer insulation not, cutting time the easy problem such as damaged.So general lamination coefficient is all lower, control 0.75 ~ 0.85 according to axial length.Given this, the invention provides winding annular core limit, a kind of limit in strip surface spraying adhesive, reach predetermined internal-and external diameter Post RDBMS shaping emery wheel again cut-in groove, the last manufacture amorphous of annealing in process or the method for nanocrystalline alloy stator iron core.Introduce the manufacture method of above-mentioned axial magnetic field amorphous, nanocrystalline motor stator core below in detail, specific as follows:
Winding annular element and toric step, the width amorphous identical with the axial length of finished product stator core or nanometer crystal alloy band is used to roll up, first described alloy strip steel rolled stock volume is opened and before winding even application one layer binder on a surface, then reel, each layer amorphous ribbon is directly bonded together, formed annular core with formed there is between adjacent alloys tape layer tack coat and there is the annular element of pre-determined inner diameter and external diameter.
Alternatively, along with the carrying out of winding, even application one layer binder on a surface of the alloy strip steel rolled stock constantly opened before winding, the inner surface of alloy strip steel rolled stock opened before being preferably sprayed on the i.e. winding of not reeling, will not reel and inner surface be bonded on the outer surface of the alloy strip sheet material layers reeled with the alloy strip steel rolled stock of binding agent, thus form the annular element between adjacent alloys tape layer with tack coat.
Described annular element, in winding process, must be the spraying adhesive of Juan Huan limit, limit in amorphous, nanocrystalline strip surface synchronization, guarantees that each layer band is bonded together formation annular element by volume ring course synchronization.In volume ring process, the control to lamination coefficient can be realized by the tension force on adjustment amorphous, nanocrystalline strip, because the method does not need follow-up dipping lacquer process, can by increasing substantially volume ring time band on tension force realize higher core lamination stack coefficient, lamination coefficient can bring up to 0.85-0.95.
When reeling described annular element, an operable amorphous, nanocrystalline strip involve in row winding, also can use plural amorphous simultaneously, nanocrystalline strip involves in row winding.Those skilled in the art should be understood that, non-crystaline amorphous metal, nanometer crystal alloy are the magnetically soft alloy materials of two kinds of different atomic structures, because these two kinds of alloys are all generally the length direction continuous print strips with one fixed width, can be applicable to using these two kinds of soft magnetic alloy sheet-bands to make iron core according to the manufacture method of iron core of the present invention.The iron core using amorphous alloy ribbon to make is called amorphous alloy iron core, and the iron core using nanometer crystal alloy to make is called nano-crystalline alloy iron core.
The binding agent being sprayed at (namely between tape layer) between described adjacent two layers alloy strip steel rolled stock must can bear the annealing temperature of more than 370 DEG C, described binding agent can be the organic binder bond that this area is commonly used also can be inorganic binder, preferably, described organic binder bond is silicone based glue, phenolic resin glue, urea-formaldehyde resin adhesive, heatproof epoxy glue, polyimides glue, the inorganic binder that described inorganic binder is TW series, SL is serial or ZS is serial.These binding agents are commercially available prod.
1-2 μm is preferably at the thickness of a layer binder of amorphous, nanocrystalline strip surface spraying.
Solidification treatment step, is cured process by described annular element, thus obtains the annular element after solidifying;
Particularly, at described solidification treatment step, curing temperature is determined according to the kind of binding agent, general control is (such as 100 DEG C, 120 DEG C, 150 DEG C, 180 DEG C, 210 DEG C, 250 DEG C, 280 DEG C, 295 DEG C) between 90-300 DEG C, the size of curing time and iron core is directly related, to guarantee that the binding agent of core interior is cured as standard completely.
Groove cutting step, immerses the annular element after described solidification in cooling fluid, uses high speed grinding wheel, above and/or under described annular element, end face carries out groove cutting, thus obtains the annular core with groove structure;
In described groove cutting step, during cutting, the rotating speed of described emery wheel is 10000-35000 rev/min (such as 11000 revs/min, 15000 revs/min, 20000 revs/min, 21000 revs/min, 25000 revs/min, 30000 revs/min, 33000 revs/min, 34500 revs/min), and described emery wheel and annular element are placed in cooling fluid completely.More preferably, described cooling fluid is pure water, water base cooling fluid or oil base cooling fluid, is commercially available prod.The thickness of described emery wheel and recess width b will be consistent, and the groove of cutting is three open rectangle, namely go up or lower surface opening, annular element inwall side opening and annular element outer wall side opening.
According to the present invention, described cutting processing mode is necessary at a high speed or the cutting of ultrahigh speed emery wheel, and the material of emery wheel can select a cube BN, SiC, Al2O3, diamond or hard ceramic, and the thickness of emery wheel must be equal with the width of annular core facing groove.Cutting process, the rotating speed of emery wheel must control at 10000-30000 rev/min, and when cutting rotating speed and reaching more than 15000 revs/min, annular core does not need to use tooling fixture to be fixed protection directly can cut grooved.Because high speed grinding wheel cutting process can produce high temperature, the cutting surfaces of groove is easily caused to burn, affect performance, so annular element and abrasive cut-off wheel entirety must be placed in cooling fluid.
Annealing steps, carries out annealing in process to the described annular core with groove structure, to eliminate bond stress and cutting stress, thus obtains the high lamination coefficient of excellent performance, low-loss finished product motor stator core.
In described annealing steps; described annealing in process is carried out under nitrogen, hydrogen or inert gas (preferred argon gas) protective atmosphere; the temperature of described annealing in process is 300 DEG C-600 DEG C (such as 305 DEG C, 350 DEG C, 380 DEG C, 410 DEG C, 450 DEG C, 480 DEG C, 520 DEG C, 550 DEG C, 570 DEG C, 590 DEG C), and temperature retention time is 0.5-5.0h (such as 0.55h, 0.8h, 1.2h, 1.5h, 2h, 2.5h, 3h, 3.5h, 4h, 4.5h, 4.8h).
The motor in axial magnetic field amorphous that the inventive method obtains, nanocrystalline alloy stator iron core, there is very low iron core, be applicable to being applied to frequency higher than the single rotor of 400Hz or birotor axial magnetic field high-frequency electric machines, especially, when frequency reaches more than 800Hz, the motor than use ordinary silicon steel core is improved 3-10% by electric efficiency.
Shown in Fig. 1 is adopting the amorphous or nanometer crystal alloy band that width is identical with the height of finished product stator core, again reeling it to be formed to have pre-determined inner diameter r
1with predetermined outer diameter r
2and the annular element 3 of axial height h.In volume ring process, an amorphous or nanocrystalline alloy strip material webs can be used to carry out volume ring, also multiple amorphous or nanocrystalline alloy strip material webs can be used simultaneously to carry out volume ring, employ four amorphous in FIG or nanocrystalline alloy strip material webs carries out volume ring simultaneously.Further, conveniently spraying adhesive, all places a shower nozzle 2 near the inner surface of the every strap before volume ring, is used for binding agent to uniformly spray on amorphous or nanocrystalline strip surface, to be directly bonded to annular element when rolling up ring.The binding agent due to non-crystalline material surface spraying, follow-up needs carries out dipping lacquer process, so tension force during volume ring on band can increase substantially, and then the lamination coefficient of annular core is significantly improved, 0.85-0.95 can be reached, about 10% can be improved than the core lamination stack coefficient that after winding, the method for dipping lacquer makes again, the power density of the motor of making that is can be made to increase by 10%.
After completing volume ring, be cured process in certain temperature, the annular core after solidification as shown in Figure 2, determine according to the kind of binding agent by the temperature of solidification process.Next, be positioned over by annular core in cutting bin 4 as shown in Figure 3, cutting bin is the cylinder of bottom lock, conveniently cutting operation, its cutting bin radius r 4 must be greater than the radius r 2 of annular element 3 and the diameter sum of cutting grinding wheel, namely meets r4>r2+2r3.During cutting, see Fig. 4, the cooling fluid 6 in cutting bin must by the submergence completely of annular element 3 and abrasive cut-off wheel 7, to ensure that cutting process can not cause the burn on work piece cut surface, affect performance.Arrange in center, cutting bin 4 end one with bottom surface, storehouse one locating cylinder 5, its diameter is equal with annular element internal diameter, its height h1 set according to the actual requirements.If the axial magnetic field iron core of cutting Double End groove structure, h1 should equal the degree of depth a's of the groove 8 and axial length c in yoke portion and, i.e. h1=a+c; If cut the axial magnetic field iron core of a fluted structure of end face, h1 should equal iron core yoke part axial length c, and h1=c.During cut-in groove, annular element 3 is placed on above locating cylinder 5.Select the recess width of the thickness of cutting grinding wheel 7 and axial magnetic field iron core equal, the direction of emery wheel cutting is the central axis pointing to annular core, and namely the central axis of annular element is pointed in the horizontal center line direction of each cutting groove.During cut-in groove, grinding wheel speed will control at 10000-30000 rev/min, when cutting rotating speed and reaching more than 15000 revs/min, annular core can save tooling fixture and directly cut trench structure, can not cause cracking or the breakage of workpiece, and cutting efficiency is high, cut surface smooth finish.If cutting Double End has the axial magnetic field stator core of groove structure, first cut the groove of an end face successively, overturn again after being namely inverted and be placed on groove structure locating cylinder cutting another end face, the size and shape of the groove that upper and lower end face is corresponding is identical, and the horizontal center line of groove corresponding to upper and lower end face is positioned on same perpendicular.The water product center line of each groove all points to the axis of annular core, and these grooves are evenly distributed on annular end face.
After groove structure cutting, carry out annealing in process, eliminate bond stress and machining stress, make axial magnetic field amorphous, the soft magnet performance of nanocrystalline alloy stator iron core reaches best.Annealing process need be carried out under the protective atmospheres such as argon gas, nitrogen or hydrogen.After annealing in process, just the amorphous of axial magnetic field, nanometer crystal alloy finished product stator core is obtained, the reeded finished product stator core 10 of the equal tool in the upper and lower end face wherein obtained, see Fig. 5, the reeded finished product stator core 11 of tool on the end face obtained, see Fig. 6, the part between adjacent grooves is tooth 9.
Embodiment 1
In the present embodiment, adopt method of the present invention to make motor in axial magnetic field amorphous, the method for nanocrystalline alloy stator iron core is identical, only need to replace corresponding thin-band material, and select different technological parameters according to the performance of different materials, the alloy stator core of amorphous, the different materials such as nanocrystalline can be prepared.Therefore, below only to prepare amorphous alloy stator iron core, in conjunction with the accompanying drawings and embodiments, the specific embodiment of the present invention is described in further detail.
In the present embodiment, the amorphous alloy strips name composition making the use of motor amorphous stator alloy-iron core is Fe
78si
9b
13(at.%), thickness of strip is 25 ± 1 μm, and width is 80mm, and surfacing is bright and clean.Amorphous alloy strips and the method for producing this kind of alloy strip steel rolled stock are not particularly limited, the Fe that the present embodiment adopts
78si
9b
13(at.%) alloy strip steel rolled stock is commercially available prod.
Preparation in accordance with the present invention, the first step as shown in Figure 1, the non-crystaline amorphous metal tape wrapping internal diameter 120mm using four volume 80mm wide, the annular core of external diameter 200mm.In winding process, inwall and the inner surface of the amorphous band simultaneously before every bar winding constantly spray heatproof G-2021 epoxy resin glue, when external diameter reaches 200mm, cut off 4 amorphous ribbons, just obtain the annular amorphous part of internal diameter 120mm, external diameter 200mm, axial length 80mm.Namely control tension stress by the winding tension controlled on amorphous ribbon, the lamination coefficient of annular core controls 0.92.Then be cured process 180 minutes at 150 DEG C, just obtain the annular non-crystaline amorphous metal part of curing molding.
Second step as shown in Figure 4, will be placed on the locating cylinder of cutting bin through the annular element of internal diameter 120mm, the external diameter 200mm of solidification process, axial length 80mm, and the diameter of locating cylinder is 120mm, highly is 50mm.Grinding wheel thickness is 6mm, and diameter is 100mm, and depth of cut is 30mm, cooling fluid degree of depth 300mm, annular element and cutting grinding wheel is immersed in completely in the cooling fluid of pure water.During cutting, grinding wheel rotating speed is arranged on 20000 revs/min, splashes in above cutting bin can add a lid to prevent cooling fluid.When the groove cutting of a width 6mm, dark 30mm is complete, annular element is rotating 360 degrees/16=22.5 ° along the circumferential direction, then cuts next groove, cuts out the groove that 16 are uniformly distributed width 6mm, dark 30mm successively on an end face of annular element.Then, taken off from locating cylinder by annular element, two end faces exchange directions, then on another end face in the same way at the groove circumferentially cutting out equally distributed 16 width 6mm, dark 30mm.When cutting the second end face, should be noted corresponding with the position of the groove of first end face, namely the longitudinal center line of the respective slot up and down of two end faces should conllinear.
3rd step carries out annealing in process to the amorphous alloy stator iron core cutting out groove, the object of annealing eliminates the machining stress introduced in the internal stress of amorphous alloy strips and fabrication of iron core process, improves the soft magnet performance of amorphous alloy stator iron core further.
Technology for Heating Processing is as follows: 1) described amorphous alloy stator iron core is put into body of heater, under the protection of nitrogen, be warming up to 370 DEG C with the rate of heat addition of 10 DEG C/min, at this temperature 120min; 2) iron core is taken out when then cooling to the furnace below 100 DEG C.So far, the making of motor in axial magnetic field amorphous alloy stator iron core is completed.
Comparative example 1
The silicon strip that the trade mark wide for 80mm is B35AV1900 by the first step, thickness is 0.35mm is wound into the annular silicon steel iron core of internal diameter 120mm, external diameter 200mm, and lamination coefficient controls 0.95.
The annular silicon steel iron core of second step to internal diameter 120mm, external diameter 200mm, axial length 80mm carries out vacuum paint dipping, is immersed in completely by annular silicon steel iron core in G-2021 epoxy resin glue, floods 4 hours, guarantee that epoxy resin soaks into completely under 5kPa.Then be cured process 180 minutes at 150 DEG C, obtain annular silicon steel iron core.
As shown in Figure 4, carry out groove cutting by through internal diameter 120mm, the external diameter 200mm of solidification process, the annular silicon steel iron core of axial length 80mm, method is with embodiment 1 for 3rd step.The Double End groove structure axial magnetic field silicon steel stator core sample of comparative example 1 is obtained after groove has cut.
Comparative example 2
This comparative example eliminates the technique of embodiment 1 spraying adhesive, its technique forming tack coat and insulating barrier is replaced by the second step vacuum paint dipping of comparative example 1, lamination coefficient also controls 0.92, other processing steps are identical with embodiment 1, obtain the Double End groove structure axial magnetic field amorphous alloy stator iron core sample of comparative example 2 thus.
The axial magnetic field amorphous alloy stator iron core prepared by the inventive method and the trade mark made in comparative example 1 are that compared with the axial magnetic field silicon steel stator core of B35AV1900, core loss can reduce 85-95%.
Compared with amorphous stator core prepared by the axial magnetic field amorphous alloy stator iron core prepared by the inventive method and method in comparative example 2, core loss can reduce by more than 50%.
Table 1 gives the lossy data of the amorphous alloy stator iron core of stator core that silicon steel sheet that comparative example 1 uses the trade mark to be B35AV1900 makes and embodiment 1, as can be seen from the table, the loss ratio silicon steel stator core of amorphous alloy stator iron core reduces 85-95%, and the power savings advantages of the higher amorphous alloy stator iron core of frequency is more obvious.Visible, the axial magnetic field amorphous alloy stator iron core that the method makes has very low core loss, and production technology is simple, the cycle is short, cost is low, is applicable to very much being applied to high frequency motor in axial magnetic field, can improve the efficiency of motor, power density and torque density.
The lossy data of the stator core of the amorphous iron core that table 1 embodiment of the present invention 1 makes and comparative example 1 and comparative example 2 contrasts
Claims (10)
1. an axial magnetic field amorphous, nanocrystalline motor stator core, it is characterized in that, described iron core is the torus of amorphous or nanometer crystal alloy band multilayer-wound, described toric above and/or under end face is evenly distributed with multiple recess, formed between described toric adjacent amorphous or nanometer crystal alloy tape layer with tack coat.
2. axial magnetic field amorphous according to claim 1, nanocrystalline motor stator core, is characterized in that, the material of described amorphous or nanometer crystal alloy band is ferrous alloy, iron nickel base alloy or cobalt-base alloys.
3. axial magnetic field amorphous according to claim 1, nanocrystalline motor stator core, is characterized in that, the horizontal center line being positioned at the described multiple recess on same end face all intersects at same point with the central axis upright of described motor stator core; Preferably, when described toric upper and lower end face is distributed with recess, the vertical center line being positioned at the recess of described upper surface overlaps with the vertical center line of the recess being correspondingly positioned at lower surface.
4. axial magnetic field amorphous according to claim 1, nanocrystalline motor stator core, is characterized in that, the thickness of described tack coat is 1-2 μm; Preferably, the shape of described recess is rectangle.
5. the manufacture method of the arbitrary described axial magnetic field amorphous of claim 1-4, nanocrystalline motor stator core, is characterized in that, comprise the steps:
Winding annular element step, use amorphous or nanometer crystal alloy band that width is identical with the axial length of finished product stator core, described alloy strip steel rolled stock is carried out reel to be formed the annular element with pre-determined inner diameter and external diameter, wherein, along with the carrying out of winding, even application one layer binder on a surface of the described alloy strip steel rolled stock constantly before winding, with the adjacent alloys tape layer forming described annular element that bonds;
Solidification treatment step, is cured process by described annular element, thus obtains the annular element after solidifying;
Recess cutting step, immerses the annular element after described solidification in cooling fluid, uses high speed grinding wheel, above and/or under described annular element, end face carries out recess cutting, thus obtains the annular core with recess structure;
Annealing steps, carries out annealing in process to the described annular core with recess structure, thus obtains finished product motor stator core.
6. manufacture method according to claim 5, it is characterized in that, described binding agent is organic binder bond or inorganic binder, preferably, described organic binder bond is silicone based glue, phenolic resin glue, urea-formaldehyde resin adhesive, heatproof epoxy glue, polyimides glue, the inorganic binder that described inorganic binder is TW series, SL is serial or ZS is serial.
7. manufacture method according to claim 5, is characterized in that, the thickness of a layer binder of described spraying is 1-2 μm.
8. manufacture method according to claim 5, is characterized in that, in described winding annular element step, tension force when reeling by improving on band improves the lamination coefficient of described finished product motor stator core, and described lamination coefficient is 0.85-0.95.
9. manufacture method according to claim 5, is characterized in that, in described solidification treatment step, the temperature of described solidification process is 90-300 DEG C; In described annealing steps, described annealing in process is carried out under nitrogen, hydrogen or inert gas shielding atmosphere; Preferably, the temperature of described annealing in process is 300-600 DEG C, and temperature retention time is 0.5-5.0h.
10. manufacture method according to claim 5, is characterized in that, in described recess cutting step, during cutting, the rotating speed of described emery wheel is 10000-35000 rev/min, and described emery wheel is placed in cooling fluid completely; Preferably, described cooling fluid is pure water, water base cooling fluid or oil base cooling fluid; More preferably, the thickness of described emery wheel is consistent with recess well width.
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| WO2018150020A1 (en) * | 2017-02-20 | 2018-08-23 | Audi Hungaria Zrt | Method for producing a component |
| CN111478474A (en) * | 2020-06-01 | 2020-07-31 | 苏州英磁新能源科技有限公司 | Motor rotor for radial cylinder type permanent magnet synchronous motor and preparation method thereof |
| CN111478530A (en) * | 2020-06-01 | 2020-07-31 | 苏州英磁新能源科技有限公司 | Manufacturing process of radial flux cylinder type motor iron core |
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