CN102361374B - Protective box type amorphous, microcrystal or nano-crystal alloy stator core for motor and preparation method thereof - Google Patents
Protective box type amorphous, microcrystal or nano-crystal alloy stator core for motor and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to the field of magnetic circuit parts of motors, and discloses a protective box type amorphous, microcrystal or nano-crystal alloy stator core for a motor and a preparation method thereof. The method comprises the following steps of: stamping a coiled alloy strip (3) to form a plurality of same annular stamped sheets, wherein the tooth ends of inner teeth (1) of the stampedsheets are positioned on the same circumference and the outer side of each stamped sheet is provided with at least one positioning groove (2); stacking the plurality of annular stamped sheets in a protective box with open upper end, putting the stamped sheets and the protective box into insulated coating solution together and performing insulated dip-coating treatment; taking out the stamped sheets and the protective box together, performing compactness treatment on the annular stamped sheets, fixing an upper end panel of the protective box and the inner center surface together, and forming the stator core; and performing integral annealing treatment on the stator core of the sealed protective box. By the method, the process problems that the stator core is easily damaged to drop residue and cracks among layers, the performance declines because the adhesive stress cannot be eliminated and the like are solved, and the performance of the stator core is greatly improved.
Description
Technical field
The invention belongs to the magnetic circuit part field of motor, be specifically related to a kind of motor with protecting boxlike amorphous, crystallite or nanocrystalline alloy stator iron core and preparation method thereof, this kind stator core is particularly useful for high-frequency electric machines.
Background technology
Along with the progress of science and technology, the motor that the power frequency supply of use 50Hz drives can't satisfy people's user demand in a lot of applications.In order to realize high rotating speed, high power density or the high torque density of motor, often the operating frequency of motor need be designed at 400-1000Hz, in addition higher.Three synchronised or the asynchronous motor of being furnished with three-phase alternating current frequency conversion (VVVF) governing system are now replacing DC series traction motor traditional, that mechanical commutator is arranged, are applied to electric automobile, track electric motor car, ships and aviation field.
Realize high power density or the high rotating speed of motor by improving frequency of supply, can cause the eddy current loss of electric machine iron core to increase considerably, have a strong impact on efficiency of motor.Because silicon steel material has high saturated magnetic induction and higher magnetic permeability, the iron core of conventional motors all uses silicon steel laminations to make.Yet the resistivity of silicon steel material is low and sheet thickness is big, and core loss is very high when being applied to high-frequency electric machines, can't satisfy the requirement of novel high-frequency high efficiency motor.Yet, non-crystaline amorphous metal compare with silicon steel material have high magnetic permeability, low-loss characteristic, can replace silicon steel and be applied to middle and high frequency electric machine iron core and realize energy-efficient purpose.
In June, 1998, the U.S. Honeywell WO99/66624 of house journal disclosed a kind of amorphous metal stator of efficient radial flux motors, this stator with the band of different length be superimposed as arc or C shape then dipping lacquer solidify to form the toothed stator that has to internal diameter direction.The stator structure that this method forms comprises a large amount of air gaps between discrete amorphous metal thin slice, therefore increased magnetic resistance and the needed corresponding electric current of service meter of magnetic circuit.
The patent of invention US6737951B1 of HIT (Hitachi) disclosed a kind of amorphous stator core processing method in 2004, this method superposes amorphous band, cut into the polyhedron amorphous block that one side or two sides have arch surface again, then these amorphous blocks are rearranged the complete stator core of formation.The iron-core element that this method is made and the silicon steel element of same size are compared, and have advantage aspect efficient, but all exist air gap in splicing place of per two polyhedron amorphous blocks, have influenced the performance of iron core to a certain extent.
The patent WO2004/070740 of U.S. Metglas Inc in 2004 discloses the photoetching etching method and has cut the method that lamination prepares the amorphous iron core stator.This method complex process, production efficiency is low, cost is high, only is fit to make complex-shaped small size amorphous alloy iron core, and the large scale amorphous alloy iron core is inapplicable for producing in batches.
The patent of invention CN101286676A of Antai Science and Technology Co., Ltd in 2008 discloses a kind of preparation method of radially amorphous alloy stator iron core.This method at first is stacked into the non-crystaline amorphous metal laminate with predetermined thickness with the amorphous alloy film of equal length, and described laminate is annealed, and carries out dipping lacquer again and solidifies processing, cuts into stator core at last.The amorphous iron core performance of this method preparation is significantly improved than silicon steel core, for certain technical foundation has been established in the batch process of amorphous motor.
The patent CN101908796A of Li Zhen in 2010 has proposed to use the amorphous metal powder to make the method for the stator core of high-frequency electric machines.This kind fabrication of iron core technology is simple, but because the unordered disperse of amorphous metal powder is in adhesive, a large amount of air gaps in the core interior disperse, cause soft magnet performances such as the saturation flux density of iron core and magnetic permeability significantly to reduce, in the operating frequency range of motor at present, use to be difficult to reach application requirements.
Above motor has all used the means of solidifying behind the dipping lacquer that amorphous thin slice or powder granule are bonded together with the manufacturing process of amorphous alloy stator iron core.Dipping lacquer solidifies can introduce very big bonding stress in amorphous alloy iron core, and the soft magnet performance counter stress of amorphous alloy material is very responsive, and this must cause the performances such as saturation flux density, magnetic permeability and core loss of amorphous stator core obviously to descend than amorphous alloy material.Therefore, exploring a kind of new motor uses the preparation method of amorphous alloy stator iron core significant.This method should make the excellent soft magnetic characteristic of non-crystaline amorphous metal under high frequency be given full play in amorphous alloy iron core, can realize the low-cost mass production of amorphous alloy iron core again, thereby satisfies the growing market demand of high frequency efficient motor.
Summary of the invention
The object of the present invention is to provide a kind of motor with protecting boxlike amorphous, crystallite or nanocrystalline alloy stator iron core and preparation method thereof, this method prepares amorphous, crystallite or nanocrystalline alloy stator iron core, only need a punching and a heat treatment, just can prepare amorphous, crystallite or the nanocrystalline alloy stator iron core of soft magnet performance excellence, producing in batches for the commercialization of amorphous, crystallite or nano-crystalline alloy iron core provides a kind of new preparation method.
In order to achieve the above object, the invention provides following technical scheme:
The motor preparation method who protects boxlike amorphous, crystallite or nanocrystalline alloy stator iron core, this stator core is ring bodies, annular punching by a plurality of identical amorphous, crystallite or nanometer crystal alloys stacks together, and this annular punching has a plurality of internal tooths 1, and wherein this method comprises following steps:
(1) amorphous, crystallite or the nanometer crystal alloy band 3 to rolling carries out the punching processing, and to form above-mentioned a plurality of identical annular punching, the increment of a plurality of internal tooths 1 of each annular punching is positioned on the same circumference, and the annular punching outside is provided with a location notch 2 at least;
(2) above-mentioned a plurality of annular punchings are stacked protecting in the box of the upper end open of packing into, form the stator core shape, put into the insulating coating liquid dip-coating processing that insulate together with protecting box then;
(3) treat that the dip-coating of insulating coating liquid fully after, with annular punching with protect box and take out together, compaction treatment is carried out in annular punching, upper end plate and the heart face that will protect box again are fixed as one, and then formation amorphous, crystallite or nanocrystalline alloy stator iron core;
(4) carry out the integrally annealed processing to sealing the amorphous, crystallite or the nanocrystalline alloy stator iron core that protect box.
The soft magnetic material of described stator core is selected from that iron-based, iron are Ni-based, amorphous, crystallite or the nano-crystalline thin carrying material of cobalt-based.
The outer shape of described annular punching is circle or polygon.
It is the following automation punching step of finishing continuously that punching in the described step (1) is handled:
The punching device that uses comprises from front to back successively: be wound with amorphous, first rotating roller 4 of crystallite or nanometer crystal alloy band 3, first tablet 5, first backing roll 6, belt delivering roller 7, towards platform 8, and be positioned at towards first drift, 12 second drifts 13 side by side of platform 8 tops with on platform 8 and respectively with first, second towards platform 12,13 corresponding first punching, 9 second punchings 10, wherein be positioned at first drift 12 of front and the heart part that first punching 9 is used for washing out iron core, and the heart clout that sweeps away is fallen into first magazine 14 that is positioned at first punching, 9 belows, second drift 13 that is positioned at the back is consistent with annular punching outer shape, cooperate with second punching 10 and to obtain complete annular punching, and second magazine 15 that is positioned at second punching, 10 belows is fallen in described annular punching, and is positioned at second backing roll 16 towards platform 8 rears, second tablet 17, second rotating roller 18 and strip coil 19.
The location notch that at least one and annular punching are complementary is set on the excircle of second drift 13 of described punching equipment.
In described step (1), the number of plies of carrying out amorphous, crystallite or nanometer crystal alloy band 3 that punching handles for 〉=1 layer and≤7 layers.
Insulation dip-coating processing method in the described step (2) is ultrasonic dip coating or vacuum press-in coating method.
The composition of the insulating coating liquid in the described step (2) is selected from: the mixed liquor of the nitric acid of the deionized water and 0.001% (wt.%) of the positive silicic acid second vinegar of (1) 9.999% (wt.%), the alcohol, 4% (wt.%) of 86% (wt.%); (2) the alcohol suspension-turbid liquid of silicon dioxide or insulating ceramics fine powder.
After the compaction treatment through described step (3), the lamination coefficient of described amorphous, crystallite or nanocrystalline alloy stator punching is between 0.75 ~ 0.95.
Entering described step (4) before, can be to described amorphous, crystallite or the nanocrystalline alloy stator iron core erector tool that is installed, in case amorphous, crystallite or nanocrystalline alloy stator iron core generation deformation in the retaining fire process.
The integrally annealed of amorphous, crystallite or nanocrystalline alloy stator iron core processing is under the protective atmosphere of nitrogen, argon gas or hydrogen in the described step (4), finish according to following steps: (I), be warming up to 110 ~ 150 ℃ with the heating rate of 10 ℃/min, temperature retention time is 5min ~ 300min; (II), be warming up to 300 ~ 560 ℃ with the heating rate of 60 ℃/min, temperature retention time is 5min ~ 300min; (III), be cooled to 80 ℃ with the rate of temperature fall of 20 ℃/min again.
Described integrally annealed processing procedure can add under the condition in magnetic field to be finished, and magnetic field intensity is 2-40mT, and magnetic direction is along the iron core circumferencial direction.
A kind of motor is with protecting boxlike amorphous, crystallite or nanocrystalline alloy stator iron core, this stator core is ring bodies, annular punching by a plurality of identical amorphous, crystallite or nanometer crystal alloys stacks together, there are a plurality of internal tooths 1 this annular punching inboard, wherein the increment of a plurality of internal tooths 1 in each annular punching is positioned on the same circumference, and the annular punching outside is provided with a location notch 2 at least;
A plurality of annular punchings stack protecting in the box of the upper end open of packing into, form the stator core shape, put into the insulating coating liquid dip-coating processing that insulate together with protecting box then;
After treating that the dip-coating of insulating coating liquid fully, with annular punching with protect box and take out together, compaction treatment is carried out in annular punching, upper end plate and the heart face that will protect box again are fixed as one, and then form required stator core;
Carry out the integrally annealed processing to sealing the stator core that protects box.
Described annular punching outer shape is circle or polygon.
The internal tooth 1 of described annular punching is for radially arranging.
The described box that protects is totally enclosed, comprise lay respectively at this stator core up and down two ends, with annular punching shape and size identical upper end plate and lower end board 20 all, and with constituted by outer circumference surface and heart face, it is inner is the hollow mid portion identical with annular punching shape.
The described box that protects is semi-enclosed, comprises laying respectively at this stator core upper end plate and lower end board 20 two ends, identical with annular punching shape and size up and down, and mid portion that constituted by the heart face, identical with annular punching shape.
Describedly protect the upper end plate of box and the thickness of lower end board 20 is 1mm, the thickness of the heart face 22 that the no magnetic line of force passes is 0.5mm, and it is 0.2mm that the thickness of the heart face 23 that the magnetic line of force passes is arranged.
Described material chosen from Fe, aluminium, copper, titanium and the alloy thereof that protects box, pottery, organic siliconresin, nylon, carbon fiber.
The described preferred magnetism-free stainless steel of material that protects box.
Beneficial effect of the present invention is:
(1) preparation method of the present invention has saved dipping lacquer and curing process, not only shortened production procedure, reduced production cost, and make the production of amorphous, crystallite or nanocrystalline stator core more energy-conservation, environmental protection more;
(2) preparation method of the present invention adopts and protects box and interlayer is carried out in the alloy punching fix, replacement dipping lacquer curing process carries out interlayer and is adhesively fixed, the mechanical stability of amorphous, crystallite or nanocrystalline stator core is guaranteed, has avoided causing in processing and the installation process problems of crack between amorphous, crystallite or nano-crystalline alloy iron core genetic horizon inadequately because of the interlayer adhesive strength;
(3) the dipping lacquer curing process binding agent for preparing amorphous, crystallite or nanocrystalline iron core generally can't bear the heat treatment temperature of eliminating core interior stress, so can not eliminate the bonding stress of core interior again by the heat treatment means behind the dipping lacquer curing process, and then cause the soft magnet performance of amorphous, crystallite or nano-crystalline alloy iron core to compare obvious decline with amorphous, crystallite or nanometer crystal alloy material.Protecting box and can bear the heat treatment temperature of eliminating amorphous, crystallite or nano-crystalline alloy iron core internal stress among the preparation method of the present invention, can pass through the disposable elimination amorphous of Technology for Heating Processing, crystallite or nanometer crystal alloy material itself and reach all stress of introducing at the inner secondary of amorphous, crystallite or nano-crystalline alloy iron core in the manufacturing process, the soft magnet performance of amorphous, crystallite or nanometer crystal alloy material excellence is farthest brought into play in iron core;
(4) preparation method of the present invention is by amorphous, crystallite or nanometer crystal alloy band are carried out the annular punching that spline is produced in punching press, packing into then has protecting of teeth groove and produces stator core in the box, can produce moment high temperature and causes amorphous, crystallite or nanometer crystal alloy material Yin Gaowen crystallization to cause problems such as magnetic deterioration thereby avoided the interlaminar bonding legal system to make cutting means that amorphous, crystallite or nano-crystalline alloy iron core use;
(5) preparation method of the present invention has saved expensive, inefficient electric spark cutting action, has reduced production cost significantly, has improved production efficiency, and the commercialization that is more suitable for amorphous, crystallite or nanocrystalline alloy stator iron core is produced in enormous quantities;
(6) adopt preparation method of the present invention to prepare in the process of amorphous, crystallite or nanocrystalline alloy stator iron core, the operation that may introduce stress comprises that the box that protects of punching, coating, compacting and iron core encapsulates, but these stress all can once be eliminated by heat treatment;
(7) amorphous, crystallite or the nanocrystalline stator core of preparation method's preparation of the present invention are compared with the silicon steel stator core and are had higher magnetic permeability and lower core loss, and the replacement silicon steel core is applied to work under high frequency high rotating speed, high power density and high torque density electrical machine more can be brought into play its advantage energy-conservation, efficient and low temperature rise.
Description of drawings
Fig. 1 is the schematic diagram of annular punching of the present invention;
Fig. 2 is for carrying out the schematic diagram that punching is handled to described amorphous alloy strips among the present invention;
Fig. 3 is for protecting the schematic diagram of the no upper end plate of box described in the present invention;
The frock jig that Fig. 4 uses when being amorphous alloy stator iron core heat treatment described in the present invention and the schematic diagram of the inner tube of a tyre;
Fig. 5 is the variety classes iron core curve chart that core loss changes with frequency f when magnetic flux density is B=0.6T (use among the amorphous alloy iron core of the silicon steel core of 1 expression trade mark DR255,2 expression use interlaminar bonding method preparations, 3 expression the present invention among the figure and protect the amorphous alloy iron core that box is made);
Fig. 6 is the variety classes iron core curve chart that core loss changes with frequency f when magnetic flux density is B=1.0T (use among the amorphous alloy iron core of the silicon steel core of 1 expression trade mark DR255,2 expression use interlaminar bonding method preparations, 3 expression the present invention among the figure and protect the amorphous alloy iron core that box is made).
Reference numeral
1 internal tooth, 2 location notchs
3 amorphous alloy strips, 4 first rotating rollers
5 first tablets, 6 first backing rolls
7 belt delivering rollers 8 are towards platform
9 first punchings, 10 second punchings
11 12 first drifts of presenting a theatrical performance as the last item on a programme
13 second drifts, 14 first magazines
15 second magazines, 16 second backing rolls
17 second tablets, 18 second rotating rollers
19 strip coils, 20 lower end board
The heart face that 21 location notchs, the 22 no magnetic lines of force pass
23 heart face 24 amorphous alloy stator iron cores that have the magnetic line of force to pass
25 non-magnetic rustproof steel plates, 26 long screws
The 27 iron core inner tubes of a tyre
Embodiment
Because adopting preparation method of the present invention to prepare motor is identical with the method for protecting boxlike amorphous, crystallite or nanocrystalline alloy stator iron core, only need replace corresponding material, and select different technological parameters according to the performance of different materials, can prepare the alloy stator core of amorphous, crystallite or different materials such as nanocrystalline, therefore, be example with the preparation amorphous alloy stator iron core only below, in conjunction with the accompanying drawings and embodiments, the specific embodiment of the present invention is described in further detail.
In the present embodiment, make motor and be Fe with the amorphous alloy strips name composition that amorphous stator alloy-iron core uses
80Si
9B
11(at.%), thickness of strip is 30 ± 1 μ m, and width is 140mm, and surfacing is bright and clean.
The first step of amorphous alloy stator iron core preparation process is amorphous alloy strips to be carried out punching handle, the schematic diagram of the annular punching of amorphous alloy stator iron core as shown in Figure 1, wherein, there are internal tooth 1 and groove in the inside of annular punching, and the edge of annular punching excircle has location notch 2.It is a continuous automation punching process that the punching of amorphous alloy stator iron core is handled, and carries out at punching equipment as shown in Figure 2.Concrete punching processing procedure is as follows: the amorphous alloy strips 3 of rolling is placed on first rotating roller 4, amorphous alloy strips 3 arrives backing roll 6 via first tablet 5, the effect of first tablet 5 is to respond to the amorphous alloy strips 3 of contact with it, when amorphous alloy strips 3 can not contact with first tablet 5, the first rotation rod 4 revolves conveying belt automatically, when amorphous alloy strips 3 touched first tablet 5, first rotating roller 4 stopped to send band.After belt delivering roller 7 sinks amorphous alloy strips 3 is pressed in its with first backing roll 6 between, by rotating amorphous band is sent into towards platform 8 then.Wherein, the rotation of described belt delivering roller 7 is sent band once during work at regular intervals by the high-precision servo Electric Machine Control, send strip length to equal distance between first drift 12 and first drift, 13 central points.First drift 12 and punching 9 cooperate goes out the inside teeth groove of punching, and the waste material that sweeps away is fallen into first magazine 14 in order to recycling; Second drift 13 is consistent with non-crystaline amorphous metal punching cylindrical shape, cooperates the amorphous alloy annular punching that sweeps away as shown in Figure 1 with punching 10, and punching is orderly falls into second magazine 15.In the punching process, belt delivering roller 7 is delivered to amorphous band behind platform 8, presents a theatrical performance as the last item on a programme 11 at first with the band compacting, and then drift 12 and 13 is with dashing at present, lifts rapidly simultaneously after finishing punching, then presents a theatrical performance as the last item on a programme 11 to lift, and belt delivering roller 7 send band again, begins punching next time.When the band of the amorphous alloy stator iron core punching of washing out hung down into second tablet 17 via second backing roll 16, second rotating roller 18 began to rotate rolling, stops rolling when rolling to amorphous band does not reach second tablet 17.The second last rotating roller 18 is rolled into strip coil 19 to the amorphous alloy strips waste material of finishing the punching processing, in order to recycle.In above-mentioned punching process, the amorphous alloy strips that uses can be individual layer, also can be multilayer, but generally below 7 layers, the number of plies of the amorphous alloy strips of Shi Yonging is 2 layers in the present embodiment.
Second step was that Fig. 3 is the schematic diagram that the non-crystaline amorphous metal stator core protects box with the amorphous alloy annular punching of previous step preparation the protecting in the box of upper end open of packing into.Provided the lower end board 20 and the heart face that protect box among Fig. 3, in addition, protected the box upper end and also have one and lower end board 20 on all four upper end plates.Because stator core generally will be encased in the motor housing, does not need to be provided with outer circumference surface so generally protect box, but the totally-enclosed box that protects with outer circumference surface can be arranged also.Protect the semiclosed box that protects that box is made up of upper and lower side panel and heart face in the present embodiment, material is selected magnetism-free stainless steel for use.Protect the box material and can also use metal and alloy materials thereof such as iron, copper, aluminium, titanium, also can select nonmetallic materials such as pottery, nylon for use.Protecting the thickness of box can decide according to the size of iron core and the lamination coefficient of non-crystaline amorphous metal punching, in order to guarantee that deformation does not take place to protect box, there be not thicker slightly that heart face 22 that the magnetic line of force passes can design when protecting the lower end board 20 of box and machine operation, but because the air gap of motor is unsuitable excessive, thinner that heart face 23 that the magnetic line of force passes can be according to the actual conditions design arranged.Upper and lower end face thickness is 1mm in the present embodiment, and heart face 22 thickness that the no magnetic line of force passes are 0.5mm, and heart face 23 thickness that have the magnetic line of force to pass are 0.2mm.After the non-crystaline amorphous metal stator punching put into iron core and protect box, connect and protect box and put into insulating coating liquid together and carry out dip-coating, for ultrasonic processing is carried out in dip-coating fully simultaneously.The insulation lotion is the mixed liquor of nitric acid of deionized water and 0.001% (wt.%) of alcohol, 4% (wt.%) of positive silicic acid second vinegar, 86% (wt.%) of 9.999% (wt.%).
The 3rd step was to take out after amorphous annular punching dip-coating fully, used extrusion equipment with the annular punching compacting of amorphous alloy stator iron core, and compaction controls by the lamination coefficient, and the lamination coefficient is generally between 0.75-0.95.The control of lamination coefficient is 0.92 in the present embodiment.Upper end plate and heart face that the mode of use welding simultaneously or rivet will be protected box are fixed as one, and then by the use of protecting box the non-crystaline amorphous metal punching are made into amorphous alloy stator iron core.
The 4th step was to add the frock jig to the amorphous alloy stator iron core that previous step is made, as shown in Figure 4.The upper and lower end face of amorphous alloy stator iron core 24 respectively uses a thickness to be 25mm centre and four jiaos of square non-magnetic rustproof steel plates 25 that all have circular hole among Fig. 4, and middle Circularhole diameter is identical with the internal diameter of amorphous alloy iron core, and four jiaos Circularhole diameter is 10mm.The circular hole that uses screwed long screw 26 to pass four jiaos of steel plates presses amorphous alloy stator iron core along the iron core axis direction, prevents iron core generation axial deformation in the annealing process.The iron core inner tube of a tyre of then packing in the interior circle of amorphous alloy stator iron core prevents that radially deformation takes place iron core in the annealing process.
The 5th step was that the amorphous alloy stator iron core that installs the frock jig is heat-treated.Heat treated purpose is the stress in oven dry insulating coating liquid and the elimination amorphous alloy stator iron core and then the soft magnet performance that improves iron core.Heat treatment process is as follows: 1) described amorphous alloy iron core is put into body of heater, charge into nitrogen after body of heater is vacuumized and be warming up to 130 ℃ with the rate of heat addition of 10 ℃/min again, at this temperature insulation 40min; 2) charge into nitrogen after body of heater being vacuumized, then the heating rate with 60 ℃/min is warming up to 380 ℃ again, and at 380 ℃ of insulation 90min; 3) start fast cooling device then body of heater is lowered the temperature, take out iron core when being cooled to 80 ℃ with the speed of 20 ℃/min.So far, finished the motor whole operation of protecting the boxlike amorphous alloy stator iron core.
Generally between 110-150 ℃, generally between 300-560 ℃, temperature retention time was generally 0-5 hour the annealing temperature that eliminates stress bake out temperature that what deserves to be explained is dielectric.Described annealing in process can be finished in protective atmospheres such as nitrogen or argon gas, also can finish adding under the condition in magnetic field.
Amorphous alloy stator iron core by method for preparing has excellent soft magnet performance, and magnetic permeability is far above silicon steel core, and loss is far below silicon steel core, and the available magnetic flux density of iron core is apparently higher than the amorphous alloy iron core that adopts bonding method preparation between synusia.The dc magnetic that table 1 has provided the amorphous alloy iron core that DR255 silicon steel core (thickness is 0.35mm), mull technique prepare, protected the amorphous alloy iron core of box method making, as can be seen from the table, the amorphous alloy iron core magnetic permeability that protects box method preparation exceeds more than 10 times than silicon steel core; Magnetic flux density just can reach 1.39T when excitation intensity only was 100A/m, was more than 2 times of silicon steel core under the identical excitation intensity, was more than 3 times of bonding amorphous alloy iron core.As seen the dc magnetic that protects the amorphous alloy iron core of box method making can be better than amorphous alloy iron core and the silicon steel core of mull technique preparation.
The amorphous alloy iron core of table 1DR255 silicon steel core (thickness is 0.35mm), mull technique preparation, protect the dc magnetic contrast of the amorphous alloy iron core of box method preparation with the present invention.
| The iron core kind | B 100 | B 400 | B 800 | B 2000 | B r(T) | H c | μ i | μ m |
| The DR255 silicon steel core | 0.53 | 1.11 | 1.32 | 1.48 | 0.399 | 52.36 | 575 | 3242 |
| The bonding method amorphous iron core | 0.38 | 0.78 | 1.07 | 1.34 | 0.416 | 16.83 | 4890 | 11970 |
| Protect box method amorphous iron core | 1.39 | 1.41 | 1.42 | 1.43 | 0.8937 | 8.685 | 6158 | 56167 |
Table 2 has provided DR255 silicon steel core (silicon steel sheet thickness 0.35mm), the amorphous alloy iron core of interlaminar bonding method preparation, the core loss data of protecting the amorphous alloy iron core of box method preparation, and Fig. 5 has provided three kinds of iron core curve charts that core loss changes with frequency f when magnetic flux density is B=0.6T and 1.0T.The loss of protecting the amorphous alloy iron core that the box method makes as can be seen is less than 1/3rd of the amorphous alloy core loss of interlaminar bonding method preparation, be lower than 1/7th of silicon steel core loss, and frequency is got over Gao Yueneng and is embodied the power savings advantages of protecting box method amorphous iron core.As seen protect the amorphous alloy iron core that the box method makes and have excellent soft magnet performance and very low core loss, be fit to very much the stator core of the high-speed electric expreess locomotive, high power density or the high torque density electrical machine that are applied to work under the high frequency.
The amorphous alloy iron core of table 2DR255 silicon steel core (silicon steel sheet thickness 0.35mm), interlaminar bonding method preparation, protect the lossy data contrast of the amorphous alloy iron core of box method preparation with the present invention
Claims (20)
1. motor usefulness is protected the preparation method of boxlike amorphous, crystallite or nanocrystalline alloy stator iron core, this stator core is ring bodies, annular punching by a plurality of identical amorphous, crystallite or nanometer crystal alloys stacks together, this annular punching has a plurality of internal tooths (1), it is characterized in that: this method comprises following steps:
(1) amorphous, crystallite or the nanometer crystal alloy band (3) to rolling carries out the punching processing, to form above-mentioned a plurality of identical annular punching, the increment of a plurality of internal tooths (1) of each annular punching is positioned on the same circumference, and the annular punching outside is provided with a location notch (2) at least;
(2) above-mentioned a plurality of annular punchings are stacked protecting in the box of the upper end open of packing into, form the stator core shape, put into the insulating coating liquid dip-coating processing that insulate together with protecting box then;
(3) treat that the dip-coating of insulating coating liquid fully after, with annular punching with protect box and take out together, compaction treatment is carried out in annular punching, upper end plate and the heart face that will protect box again are fixed as one, and then formation amorphous, crystallite or nanocrystalline alloy stator iron core;
(4) carry out the integrally annealed processing to sealing the amorphous, crystallite or the nanocrystalline alloy stator iron core that protect box.
2. the preparation method described in claim 1 is characterized in that: the soft magnetic material of described stator core is selected from that iron-based, iron are Ni-based, amorphous, crystallite or the nano-crystalline thin carrying material of cobalt-based.
3. the preparation method described in claim 1, it is characterized in that: the outer shape of described annular punching is circle or polygon.
4. the preparation method described in claim 1 is characterized in that: it is the following automation punching step of finishing continuously that the punching in the described step (1) is handled:
The punching device that uses comprises from front to back successively: be wound with amorphous, first rotating roller (4) of crystallite or nanometer crystal alloy band (3), first tablet (5), first backing roll (6), belt delivering roller (7), towards platform (8), and be positioned at towards first drift (12) second drifts (13) side by side of platform (8) top with on platform (8) and respectively with first, second drift (12,13) corresponding first punching (9) second punchings (10), wherein be positioned at first drift (12) of front and the heart part that first punching (9) is used for washing out iron core, and the heart clout that sweeps away is fallen into first magazine (14) that is positioned at first punching (9) below, second drift (13) that is positioned at the back is consistent with annular punching outer shape, cooperate with second punching (10) and to obtain complete annular punching, and second magazine (15) that is positioned at second punching (10) below is fallen in described annular punching, and is positioned at towards second backing roll (16) at platform (8) rear, second tablet (17), second rotating roller (18) and strip coil (19).
5. the preparation method described in claim 4 is characterized in that: the location notch that at least one and annular punching are complementary is set on the excircle of second drift (13) of described punching device.
6. the preparation method described in claim 1 is characterized in that: in described step (1), the number of plies of carrying out amorphous, crystallite or nanometer crystal alloy band (3) that punching handles for 〉=1 layer and≤7 layers.
7. the preparation method described in claim 1, it is characterized in that: the insulation dip-coating processing method in the described step (2) is ultrasonic dip coating or vacuum press-in coating method.
8. the preparation method described in claim 1, it is characterized in that: the composition of the insulating coating liquid in the described step (2) is selected from: the mixed liquor of the nitric acid of the deionized water and 0.001% (wt.%) of the positive silicic acid second vinegar of (1) 9.999% (wt.%), the alcohol, 4% (wt.%) of 86% (wt.%); (2) the alcohol suspension-turbid liquid of silicon dioxide or insulating ceramics fine powder.
9. the preparation method described in claim 1 is characterized in that: after the compaction treatment through described step (3), the lamination coefficient of described amorphous, crystallite or nanocrystalline alloy stator punching is between 0.75～0.95.
10. the preparation method described in claim 1, it is characterized in that: entering described step (4) before, can be to described amorphous, crystallite or the nanocrystalline alloy stator iron core erector tool that is installed, in case amorphous, crystallite or nanocrystalline alloy stator iron core generation deformation in the retaining fire process.
11. the preparation method described in claim 1, it is characterized in that: the integrally annealed of amorphous, crystallite or nanocrystalline alloy stator iron core processing is under the protective atmosphere of nitrogen, argon gas or hydrogen in the described step (4), finish according to following steps: (I), be warming up to 110～150 ℃ with the heating rate of 10 ℃/min, temperature retention time is 5min～300min; (II), be warming up to 300～560 ℃ with the heating rate of 60 ℃/min, temperature retention time is 5min～300min; (III), be cooled to 80 ℃ with the rate of temperature fall of 20 ℃/min again.
12. the preparation method described in claim 1 or 11 is characterized in that: described integrally annealed processing procedure can add under the condition in magnetic field to be finished, and magnetic field intensity is 2-40mT, and magnetic direction is along the iron core circumferencial direction.
13. the motor of the method for claim 1 manufacturing is with protecting boxlike amorphous, crystallite or nanocrystalline alloy stator iron core, this stator core is ring bodies, annular punching by a plurality of identical amorphous, crystallite or nanometer crystal alloys stacks together, there are a plurality of internal tooths (1) this annular punching inboard, it is characterized in that: the increment of a plurality of internal tooths (1) in each annular punching is positioned on the same circumference, and the annular punching outside is provided with a location notch (2) at least;
A plurality of annular punchings stack protecting in the box of the upper end open of packing into, form the stator core shape, put into the insulating coating liquid dip-coating processing that insulate together with protecting box then;
After treating that the dip-coating of insulating coating liquid fully, with annular punching with protect box and take out together, compaction treatment is carried out in annular punching, upper end plate and the heart face that will protect box again are fixed as one, and then form required stator core;
Carry out the integrally annealed processing to sealing the stator core that protects box.
14. as stator core as described in the claim 13, it is characterized in that: described annular punching outer shape is circle or polygon.
15. as stator core as described in the claim 13, it is characterized in that: the internal tooth of described annular punching (1) is for radially arranging.
16. the stator core described in claim 13, it is characterized in that: the described box that protects is totally enclosed, comprise lay respectively at this stator core up and down two ends, with annular punching shape and size identical upper end plate and lower end board (20) all, and with constituted by outer circumference surface and heart face, it is inner is the hollow mid portion identical with annular punching shape.
17. the stator core described in claim 13, it is characterized in that: the described box that protects is semi-enclosed, comprise laying respectively at this stator core upper end plate two ends, identical with annular punching shape and size and lower end board (20) up and down, and mid portion that constituted by the heart face, identical with annular punching shape.
18. the stator core described in claim 13, it is characterized in that: describedly protect the upper end plate of box and the thickness of lower end board (20) is 1mm, the thickness of the heart face (22) that the no magnetic line of force passes is 0.5mm, and it is 0.2mm that the thickness of the heart face (23) that the magnetic line of force passes is arranged.
19. the stator core described in claim 13 is characterized in that: described material chosen from Fe and alloy, aluminium and alloy thereof, copper and alloy thereof, titanium and the alloy thereof that protects box, pottery, organic siliconresin, nylon, carbon fiber.
20. the stator core described in claim 19 is characterized in that: the described preferred magnetism-free stainless steel of material that protects box.
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| CN 201110332934 CN102361374B (en) | 2011-10-28 | 2011-10-28 | Protective box type amorphous, microcrystal or nano-crystal alloy stator core for motor and preparation method thereof |
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| CN 201110332934 CN102361374B (en) | 2011-10-28 | 2011-10-28 | Protective box type amorphous, microcrystal or nano-crystal alloy stator core for motor and preparation method thereof |
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