CN1897176A - Production of sectional scrolling iron core - Google Patents
Production of sectional scrolling iron core Download PDFInfo
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- CN1897176A CN1897176A CN 200610035356 CN200610035356A CN1897176A CN 1897176 A CN1897176 A CN 1897176A CN 200610035356 CN200610035356 CN 200610035356 CN 200610035356 A CN200610035356 A CN 200610035356A CN 1897176 A CN1897176 A CN 1897176A
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Abstract
A method for preparing sectional type of rolled iron core includes forming rolled iron core by binding silicon strips to be block body then using electrospark wire-electrode cutting process to breaking column of rolled iron core, applying electrolytic corrosion process to carry out insulation treatment on cut surface, butt-jointing sectioned U form iron core to let magnetic path be closed after coil is sockted on said iron core and realizing horizontal holding and longitudinal fastening of rolled iron core column in sectional type by T form drawplate at internal and external sides of iron core column.
Description
Field that the present invention belongs to:
The invention belongs to power transformer iron core manufacturing technology field.
Technical background:
Existing transformer core, single-phase or three-phase structure no matter, a kind of is plane laminated core structure, another kind is volume core construction (having the plane to roll up the branch of three-phase structure unshakable in one's determination and three dimensional wound core three-phase structure again to three-phase volume core construction).The problem that plane laminated core structure mainly exists is: seam unshakable in one's determination causes loss height, exciting current big more, noise cut-to-length equipment investment, silicon strip utilance big, need be expensive is lower, lamination technology expends man-hour etc. very much, in addition, the asymmetric power transmission and transformation quality that also influences of three-phase magnetic circuit.So people begin sight is focused on the volume iron core transformer of three-phase stereo and make up, and succeed.Yet, roll up the complexity of also bringing manufacturing process when jointless structure unshakable in one's determination brings the benefit of loss and noise reduction, on the one hand, roll up annealing process trouble unshakable in one's determination, power consumption, on the other hand because closed core causes the Wound iron-core transformer manufacturing process different fully with plane laminated core transformer, Wound iron-core transformer must use special coil winding machine coiling on core limb, it is very difficult making coil in this case, it is more difficult to want molded coil to make dry-type transformer, and the efficient of coiling is very low, therefore needs the more coil winding machine device resource of configuration.Making the investment that volume cut-to-length investment of saving unshakable in one's determination is increased extraordinary spooling equipment again like this offsets.
Chinese patent application 200610033591.8 " sectional iron core transformer/reactor " discloses volume fragmentation technique and Wire EDM disjunction volume method unshakable in one's determination thereof unshakable in one's determination, but does not propose the processing method and the volume tightening technology scheme of restoring unshakable in one's determination of cutting section.Simultaneously, the disjunction of core limb also has other feasible methods.The solution that the disjunction volume noise that brings unshakable in one's determination increases is not proposed yet.
Invention task and technical scheme:
The present invention is intended to seek a kind of manufacture method of sectional scrolling iron core, can be both can image plane laminated core transformer make coil and unshakable in one's determination, coil and unshakable in one's determinationly finish assembling then like that independently in the general assembly operation, can resemble does not again have seam in window unshakable in one's determination corner the Wound iron-core transformer, do not need cut-to-length processing lamination unshakable in one's determination, do not need lamination, tear loaded down with trivial details flow charts such as sheet and inserted sheet open.The sectional scrolling iron core transformer of making should be similar to the performance level that possesses existing whole Wound iron-core transformer.
The present invention has conceived a kind of in volume shell of column disjunction volume unshakable in one's determination segmented manufacture method unshakable in one's determination unshakable in one's determination, form the iron circuit of transformer by following 7 steps, 1. silicon strip coiled strip slitting is cut, 2. cut silicon strip and form the volume iron core frame by continuous reeling, 3. roll up iron core frame and eliminate coiling stress by The high temperature anneal, 4. roll up between the electrical steel belt bonding, unshakable in one's determination being become by lamilated body of volume is block entity, 5. carry out line cutting disjunction iron core frame at the shell of column unshakable in one's determination position of volume iron core frame suit coil, be divided into two U-iron hearts, 6. to carrying out insulation processing between the anxious silicon steel strap that cuts off face of U-iron, 7. when the coil of transformer assembles with iron core, interface insulation processing, recovery volume iron core frame become complete annular closed magnetic circuit.
Disconnect in case volume is unshakable in one's determination, negative factors such as the noise increase that fracture brings, loss increase, exciting current increase will be properly settled, and be reduced to acceptable minimum level.
Be the noise that the magnetostriction that limits iron core produces, by bonding together between vacuum impregnation resin or the feasible volume of coating low melting point silicates sealing by fusing material electrical steel strap, iron core becomes a block by lamilated body.
Apply the audio frequency exciting current to rolling up iron core, anneal by the eddy current loss and the feasible heating realization volume unshakable in one's determination of the magnetic hysteresis loss quick high-temp unshakable in one's determination of volume iron circuit.
Adopt electrochemical etching method can realize opening circuit of bridge joint burr between cut surface silicon steel strap, realize lamination insulation.And the joint face of the large tracts of land conducting that need the thin layer insulation gap between cut surface/composition surface, dislocation forms between the silicon steel strap of composition surface when preventing two U-iron heart recovery volume iron core frames stops the composition surface to produce large-area eddy current loss.
The good lamination insulation on composition surface, realize the magnetic circuit gap, composition surface of approximate zero distance, effectively roll up stalk to be three key problem in technology that sectional scrolling iron core is made to the bonding tightly technology of pluging with molten metal.
Like this, unshakable in one's determination the having no progeny at stem section branch of volume just can like that independently be made coil and follow-up overall the assembling by image plane laminated core transformer, and the transformer of making has both volume technical performance advantage unshakable in one's determination again.
The manufacture method of the sectional scrolling iron core that the present invention relates to below in conjunction with description of drawings.
Fig. 1 is the single volume iron core frame of reeling and finishing
Fig. 2 is a volume iron core frame audio frequency excitation method annealing process schematic diagram
To be the volume iron core frame be cut branch in volume core limb portion to Fig. 3 that to be broken into two sections U-iron heart Fig. 4 be that the anxious face that cuts off of U-iron carries out electrochemistry (electrolytic etching method) handling principle figure
Fig. 4 A is the micro-enlarged drawing of branch section after electrolytic etching method is handled
Cut surface/composition surface syndeton schematic diagram when Fig. 5 is the recovery of volume iron core frame
Fig. 6 be the three-phase stereo sectional scrolling iron core structure that becomes of three volume iron core frame Δ yoke pieces tightly plug with molten metal structure chart
Fig. 7 is the whole volume process chart of making unshakable in one's determination
Among Fig. 1,1-rolls up rear of core, 2-volume core limb portion, 3-silicon strip
Among Fig. 2, the 3-silicon strip, 11-rolls up iron core frame, 12-magnet exciting coil, 13-audio frequency field power supply, 14-resonant capacitance.
Among Fig. 3, the 3-silicon strip, 21-epimere U-shaped band stem yoke, 22-hypomere U-shaped band stem yoke, 23-divides section/composition surface, 25-silicon strip ferromagnetic material layers, 26-silicon strip alramenting layer, adhesive linkage between 27-silicon steel strap.
Among Fig. 4,21-epimere U-shaped band stem yoke, 31-electrolyte, the 32-electrolytic cell, the 33-cathode electrode, the 34-cable, the 35-DC power supply, the 36-electricity is led flexible contact mat.
Among Fig. 4 A, 23-divides section/composition surface, 25-silicon strip ferromagnetic material layers, 26-silicon strip alramenting layer, adhesive linkage between 27-silicon steel strap, 28-conductive bridge burr.
Among Fig. 5, the 3-silicon strip, 21-epimere U-shaped band stem yoke, 22-hypomere U-shaped band stem yoke, 23-divides section/composition surface, adhesive linkage between 27-silicon steel strap, the last yoke of 41-divides the section insulating barrier, and yoke divides the section insulating barrier under the 42-, 43-thin layer insulation spacer.
Among Fig. 6,21-epimere U-shaped band stem yoke, 22-hypomere U-shaped band stem yoke, 23-divides section/composition surface, 51-low-voltage coil, 52-high-tension coil, yoke Δ clevis spare under the 53-, the last yoke Δ of 54-clevis spare, the inboard T shape of 55-arm-tie, 56-outside T shape arm-tie, 57-top board, 58-simply supported beam, the vertical trip bolt of 59-, 510-pin axle, 511-are laterally tightly pluged with molten metal screw, 512-steel loop lasso trick.
Fig. 1 example goes out the volume iron core frame of seeing usually, according to the difference at mounting coil position, we are called volume rear of core (1) to the volume core portion that connects two phase coils, and the volume core portion of suit coil is called volume core limb portion (2), and the volume iron core frame is made by coiling by silicon strip (3).The core section profile that forms of reeling may be circle, rectangle, D shape etc.
Behind the silicon strip cold working coiling and molding volume iron core frame, have very big residual bend stress in the corner of volume iron core frame, the existence of this stress influences the magnetic property of silicon strip greatly, so, must annealing in process.Traditional method for annealing is a long-time high annealing in vacuum annealing furnace, reduces or eliminate substantially the stress of rotation angle position.Too high temperature can make the orientation characteristic of cold-rolled silicon steel tape disappear, so, need strict control annealing temperature.
Fig. 2 example goes out the method that a kind of volume iron core frame (11) carries out the annealing of audio frequency excitation, because the silicon strip loss comprises magnetic hysteresis loss and eddy current loss, total losses after two merging and 1.3 powers of excitation frequency are proportional, so, loss is the iron core of 1kW during 50Hz, and the loss during 500Hz has 20kW, loss during 1kHz has 50kW, so, improve frequency, can make unshakable in one's determination the heating fast to the annealing temperature of needs.And under annealing temperature, owing to added excitation field, to the excitation magnetization of silicon strip crystal structure, highly beneficial to the silicon strip orientation magnetic property that increases volume fillet unshakable in one's determination place.In addition, because high performance silicon strip all is a cold-rolled orientation, vertically have better magnetic property along silicon strip, do not make the position of volume straightway unshakable in one's determination (no coiling stress) reduce magnetic conduction orientation characteristic so do not wish too high annealing temperature, and this audio frequency excitation method for annealing, because the volume iron core on the corner has higher iron loss, so the corner temperature rise is higher, so, accurately control annealing temperature, just can realize rolling up the dream of corner differential annealing unshakable in one's determination.
Owing to be high annealing, magnet exciting coil (12) just need be inner water flowing cooling copper pipe, just as the induction coil of HF induction heating apparatus use.The purpose of doing like this is to prevent coil-conductor oxidation affects electric conductivity.When vacuum is annealed, also can consider without water cooled coil.
Because the power that needs when implementing the annealing of audio frequency excitation to the heavy in section is unshakable in one's determination is bigger, magnet exciting coil and the volume reactance value that forms unshakable in one's determination is very big, so, need to adopt harmonic technology to realize the audio frequency excitation annealing that volume is unshakable in one's determination.Magnet exciting coil and the volume suitable resonant capacitance (14) of inductance coupling that forms unshakable in one's determination can constitute the resonant tank of required frequency, and the audio frequency field power supply (13) of this high power resonant vibration technology also is easy to obtain from the market.
What illustrate among Fig. 2 is the resonance method of series resonance, is exactly parallel resonance when resonant capacitance (14) and inductance parallel connection, and two kinds of methods of series resonance and parallel resonance can obtain big audio frequency exciting current, realize the audio frequency excitation annealing that volume is unshakable in one's determination.
If silicon-coating hydrochlorate sealing by fusing material between volume electrical steel band (3) sheet, when annealing temperature was 800 ℃, it is proper that the melt temperature of silicate sealing by fusing material should be controlled at 800 ℃ of left and right sides so.Composition by allotment silicate sealing by fusing material is realized this goal easily, and the melt temperature of a lot of ceramic glazes is near this numerical value.When the annealing of volume iron core frame (11) audio frequency excitation, the silicate sealing by fusing material fusion that applies between the silicon strip just forms adhesive linkage between the silicon steel strap after the cooling.
The vacuum annealing unshakable in one's determination of traditional volume generally needs the time more than 30 hours, adopts audio frequency excitation annealing process then can shorten annealing time greatly, simultaneously a large amount of energy efficient.
Fig. 3 example goes out single volume iron core frame (11) and is broken into two sections U-iron hearts from volume core limb portion (2) by being divided, be called epimere U-shaped band stem yoke (21) and hypomere U-shaped band stem yoke (22) respectively, dividing section/composition surface (23) can be planar design or broken line face version according to transformer capacity with the different of cutting disjunction equipment.Also illustrate the microstructure of silicon strip (3) coiling stack layer among the figure, illustrate the ferromagnetic material layers (25) and the silicon strip alramenting layer (26) of silicon strip, and adhesive linkage (27) between the silicon steel strap.Finished the bonding bonding of silicon strip interlayer because volume is unshakable in one's determination before disjunction, core limb becomes a firm block by laminated silicon strip stack, so, the cutting of volume iron core frame divides to have no progeny can not be out of shape, can be not loose, like this, can be at complete joint recovery volume iron core frame of when assembling.
The method of disjunction volume iron core frame (11) is more, and this comprises electric spark (blast corrosion) wire cutting method, and band saw or circular saw machinery cutting method.The very smooth precision of section that electric spark wire cutting method forms, the Forming Quality height, the core limb loss can be ignored, and can cut into the broken line face, two U-irons line face of being filled with admiration engages and restores the magnetic property and the adhesive strength that can improve joint, but the electric spark wire cutting method process velocity is slower.Band saw or the processing of circular saw machinery cutting method are very fast, but section is very coarse, need further denude fine finishining with grinding machine, and core limb loses 3mm length at least, and the branch section can only be a single plane.
What Fig. 3 illustrated is the volume iron core frame of circular cross-section, can not be confined to shown in this figure, and the core section profile can be circular, rectangle, perhaps D shape as required.Core section can be complete circle, perhaps the multistage stairstepping of inscribed.
The formation method of adhesive linkage between the silicon steel strap (27) has two kinds.The one,, behind volume high annealing unshakable in one's determination, before the volume cutting unshakable in one's determination, the resin bonding material that vacuum impregnation is very rare, and through overcuring, like this between the silicon steel strap with regard to saturation resin bonding material; The 2nd,, in the silicon strip winding process, successively apply low melting point silicates sealing by fusing material, make the silicates sealing by fusing material fusion when high annealing of volume iron core also cool off the back silicon strip and just bond together.So the material of adhesive linkage between the silicon steel strap (27) can be an organic material, also can be the inorganic silicic acid salt material.The inorganic silicic acid salt material has higher heat-resistant quality, and the process of the coating of reeling, annealing fusion is more simpler than the technology that volume vacuum impregnation resin unshakable in one's determination is heating and curing again.
Theoretically, (being approximately 6 * 10-6) (is generally 12 * 10-6) little than ferromagnet because the coefficient of linear expansion of silicate sealing by fusing material, so, the volume iron core frame is after about 800 ℃ annealing temperature cooling, silicon strip (3) is with residual-tensile stress, and the silicate sealing by fusing bed of material (27) is with compressive residual stress.This will help improving the performance of silicon strip, and we are desired just.
When being bonded to block entity between volume electrical steel belt, the noise level that magnetostriction unshakable in one's determination causes will reduce greatly.
The section of the volume iron core frame (11) of disjunction, the short circuit bridge joint burr between the silicon steel strap exists on the section owing to cause during cutting processing, if measure any 2 dc impedances that divide on section/composition surface (23) with ohmmeter, its resistance is generally less than 1 ohm, like this, when the static exciter magnetic flux passes through this minute section/composition surface (23), must cause huge eddy current to exist, even localized hyperthermia's burnout failure occur.So, must recover to divide the lamination insulation between the silicon strip of section/composition surface (23).
The method of this recovery silicon strip lamination insulation has two kinds, and the one, precision optical machinery abrasion method, the 2nd, electrochemical etching method.
The abrasion method is exactly dividing section/composition surface (23) to process with the grinding machine abrasion, polishing then, short circuit bridge joint burr is mechanically removed, because abraded quantity is very little, generally in 0.5mm, so this processing method is than very fast, but maximum deficiency is to need accurately location workpiece and Precision Machining, the morpheme error that its processing causes directly influences the magnetic circuit performance after the volume iron core frame restores.If volume iron core frame (11) is to cut off with band saw (perhaps circular saw), it will be seriously rough and uneven in surface processing section so, just need grinding machine processing smooth.Surface after the polishing can be satisfied the requirement of silicon strip lamination insulation substantially.
Electrochemical etching method utilizes the primary cell reaction principle exactly, carries out electrochemical reaction on a minute section/composition surface (23), makes the burr corrosion of short circuit bridge joint open circuit.Adopt displacement reaction, acid corrosion reaction, cell reaction all can achieve the goal.
The U-iron heart section of Fig. 4 signal carries out among electrochemistry (electrolytic etching method) the handling principle figure, splendid attire electrolyte (31) in the electrolytic cell (32), electrolyte generally uses ferric chloride aqueous solutions, connect cathode electrode (33) and anode electrode (promptly going up/hypomere U-shaped band stem yoke) by DC power supply (35) like this, just constitute the cell reaction loop.Introducing electricity among Fig. 4, to lead the purpose of flexible contact mat (36) be to guarantee that every silicon strip (3) can both well connect power anode.According to electrolysis principle, the iron atom of anode silicon strip will be dissolved in the electrolyte, on cathode electrode (33), will reduce (plating) go out metallic iron.This electrolytic treatments only needs a few minutes to finish.Obviously, must guarantee to divide the cleaning on section/composition surface (3) before the electrolysis, not have the foreign matter of influence conductions such as greasy dirt, oxide.The switch of finishing dealing with behind the section of U-shaped band stem yoke is handled the another one section.Only illustrate among the figure to handle epimere U-shaped band stem yoke (21), the processing method of hypomere U-shaped band stem yoke (22) is identical.Electrolytic treatments finishes, and needs to clean section and dried, measures dc impedance between sheet, is advisable greater than 100 Ω at least.
Fig. 4 A shows the micro-effect of section through the U-shaped band stem yoke after the electrolytic etching method processing, (A) is the situation that conductive bridge burr (28) are arranged between silicon strip (3) sheet that forms after the line cutting among the figure, (B) is that conductive bridge burr (28) was corroded after electrolytic etching method was handled among the figure, exposes adhesive linkage (27) between silicon strip alramenting layer (26) and silicon steel strap.And, because the field intensity localization effects that the serious electric field distortion in stupefied limit, silicon strip (3) right angle and burr place causes make that not only burr is dissolved at first, and the obtuse angleization also appears in stupefied limit, silicon strip right angle.So just can obtain good silicon strip lamination insulation effect, the groove that occurs between sheet provides anchor point for the adhesive strength that improves the section butt joint later on, though insulation can be realized in the surface of mechanical polishing, but the resin bonding degradation when making the section butt joint, so even the also suitable further electrochemical corrosion processing in the surface of grinding machine processing and polishing.
Electrolytic etching method is handled only needs time a few minutes to get final product, and the processing time that other electrochemical methods need is very long.
Wire EDM disjunction volume iron core frame is implemented electrolytic etching method again and is handled two steps of section and just can obtain desirable effect.Because Wire-cut Electrical Discharge Machining precision height, section is smooth, can be processed into the broken line face, and electrolytic etching method is handled the physical dimension that section does not influence section, so the combination of these two kinds of technologies can obtain desirable processing effect.
The present invention preferentially recommends the cell reaction etch to handle the cutting section of volume iron core frame.This method is effective and rapid, and insulation and bonding quality are higher.
Example goes out the structure that two sections U-shaped band stem yoke butt joints constitute complete closure ring-shaped core magnetic circuit among Fig. 5.Because staggered contact of the silicon strip of epimere U-shaped band stem yoke (21) and hypomere U-shaped band stem yoke (22) will form large-area conductive plane, the isolation so must between the two, effectively insulate, but, because the big young pathbreaker of external series gap directly influences the magnetic circuit magnetic resistance, so clearance layer thickness should control to minimum.Illustrate among Fig. 5 that yoke divides section insulating barrier (41), yoke divides the connected structure that section insulating barrier (42) and thin layer insulation spacer (43) constitute down.In theory, as long as in these three insulating barriers a complete existence is arranged, but for safety, thin layer insulation spacer (43) generally can not be default.It can be resin coating layer, oxide layer of phosphate coating, curing etc. that last yoke divides section insulating barrier (41) and following yoke to divide section insulating barrier (42), and thickness is generally in the 0.01mm-0.05mm level; Thin layer insulation spacer (43) can be NOMEX paper, polyester non-woven fabric, fiberglass products, thin-film material, fabric, particle diameter less than 50 μ m powder thin layers etc., thickness is generally in the 0.05mm level.Overall magnetic circuit gap should be controlled in the 0.1mm, and this accomplishes easily.Core-diameter hour, electromagnetic force a little less than, can not apply resin adhesive in this magnetic circuit gap, when core-diameter is big, will rely on resin binder two composition surface strong bond, this interface cohesive force may be far longer than vertical thrust that arm-tie provides.
The simplest method is no more than when iron core assembles, place thin layer insulation spacer (43) steeping liq resin binder simultaneously, rely on volume vertical stretching screw unshakable in one's determination to extrude unnecessary resin binder, to dock the slit and be compressed to minimum, finish further cured resin adhesive of assembling back, form the adhesive bond of section.
Fig. 6 then example goes out a kind of iron core frame recovery assembly structure, and this iron core is tightly pluged with molten metal structure and finished simultaneously in the coil assembling process.Its example be the three-phase stereo sectional scrolling iron core structure that becomes of a kind of three advanced volume iron core frame Δ yoke pieces tightly plug with molten metal structure.After the butt joint of epimere U-shaped band stem yoke (21) and hypomere U-shaped band stem yoke (22) is closed into annular, vertical tightening structure along the shell of column direction unshakable in one's determination of rolling up iron core frame has inboard T shape arm-tie (55) and outside T shape arm-tie (56) to constitute applies vertical compressive stres by housing screw (59); Meanwhile, inboard T shape arm-tie (55) and outside T shape arm-tie (56) form clamp region, laterally branch section/composition surface (23) slippage dislocation of restriction epimere U-shaped band stem yoke (21) and hypomere U-shaped band stem yoke (22) is by tightly pluging with molten metal the bending clamping stress that screw (511) applies clamping plate.The position of inboard T shape arm-tie (55) and outside T shape arm-tie (56) is adjacent to unshakable in one's determination the placement, and can place between two-phase individual volume iron core frame.Thisly plug with molten metal tightly that space that structure made full use of the interval between last yoke Δ clevis spare (54) and following yoke Δ clevis spare (53) and three the D shape individual volume iron core frames and provide realizes.
Certainly this structure of tightly pluging with molten metal is not unique, but its objective is clearly, and epimere U-shaped band stem yoke (21) and hypomere U-shaped band stem yoke (22) are vertically compressed and shell of column unshakable in one's determination is laterally clamped.This pulling plate structure provides simultaneously the tightening of low-voltage coil (51), high-tension coil (52) has been supported.
Fig. 7 has summed up the basic procedure of sectional scrolling iron core manufacturing process.The silicon strip coiled strip cuts into various width through slitting billot uses for volume iron core frame coiling, and this goes on foot to 1. opening material process; It is unshakable in one's determination that the silicon strip of then reeling becomes volume, and (recommendation in the winding process) along the continuous silicon-coating hydrochlorate of silicon strip aspect sealing by fusing material, this step is the operation of 2. reeling; Then roll up the iron core frame annealing in process, (can adopt traditional vacuum annealing furnace annealing process, perhaps adopt audio frequency excitation method for annealing) is called 3. annealing operation; If not along the continuous silicon-coating hydrochlorate of silicon strip aspect sealing by fusing material, so, must carry out vacuum impregnation resin and cured to the volume iron core frame after finishing annealing operation in the silicon strip winding process, guide as dotted line among the figure, be called 4. ply adhesion operation; Then partly disconnected unshakable in one's determination at volume iron core frame post, on becoming/following two U-shaped band stem yokes, (can adopt Wire EDM, also can adopt cutting of band saw line or circular saw cutting) is called and 5. cuts off operation; Then, can adopt electrochemical method to handle (preferred electrolytic etching method), guide, also can adopt the abrasion method to handle, guide, be called 6. section insulation processing operation as dotted line among the figure as solid line among the figure to carrying out insulation processing between the cutting dough sheet; Then insulation gap is carried out on the composition surface of last/following two U-shaped band stem yokes and handle, and roll up the recovery assembling of iron core frame simultaneously, be called 7. assembly process.
Among Fig. 7, the solid line flow process is the selection process flow process, and the dotted line flow process is optional alternative techniques flow process.These optional processes all constitute embodiments of the invention.
The sectional scrolling iron core that the present invention relates to, its permeability magnetic material is not limited to silicon strip, and is suitable equally to amorphous alloy strip.
The volume that the present invention relates to manufacture method unshakable in one's determination is applicable to power transformer, comprises distribution transformer, is not suitable for the power transformer iron core.
Implement the effect that technical scheme of the present invention obtains:
The sectional scrolling iron core structural change conventional iron core structure so that sectional iron core transformer becomes Be a kind of product of a kind of performance between Wound iron-core transformer and laminated core transformer, possess comprehensive Technical Economy.
The sectional scrolling iron core structure is compared with the laminated core structure, becomes 2 iron cores by 4 corner connection seams Post straightway seam, the seam number has reduced 50%, so the progress on the iron circuit performance is significant, Its processing quality and process efficiency also improve greatly, also have, and have saved expensive silicon strip cut-to-length and have established Standby investment.
Can improve volume performance unshakable in one's determination to rolling up the audio frequency excitation annealing process that adopts unshakable in one's determination, when shortening annealing simultaneously Between, energy efficient. When volume electrical steel band interlayer was bonded to integral body, mangneto unshakable in one's determination was stretched The noise level that contracting causes reduces greatly.
Electrolytic etching method is processed volume disjunction cross section unshakable in one's determination and has been obtained simple and direct, desirable insulation processing effect.
Roll up alternate T shape arm-tie unshakable in one's determination and tightly plug with molten metal structure, solved up/down U-shaped band stem yoke and vertically pressed Tight and shell of column unshakable in one's determination is rolled up in segmentation laterally clamped problem.
Sectional scrolling iron core is so that the essence change has taken place in the manufacturing process of conventional roll iron-core transformer. Need not use again the special-purpose coil winding machine coiling of ring-shaped core, save so again expensive annular iron The equipment investment of heart coil winding machine, and the low 'bottleneck' restrictions of the winding efficiency of annual core winder are beaten Broken, in case winding coil can independently be made, just can adopt pouring technology or other special processes manufacturing High performance coil, low-voltage coil just can use foil winding, and Wound iron-core transformer is begun by oil immersion The formula epoch are stepped into the dry-type transformer epoch.
Claims (10)
1, a kind of segmented transformer volume manufacture method unshakable in one's determination, comprise the volume iron core that silicon strip or amorphous alloy strip are made, it is characterized in that: the iron circuit that forms transformer by following 7 steps, 1. the silicon strip coiled strip is cut, 2. silicon strip divides blank to form the volume iron core frame by continuous reeling, 3. roll up iron core frame and eliminate coiling stress by The high temperature anneal, 4. roll up between the electrical steel belt bonding, unshakable in one's determination being become by lamilated body of volume is block entity, 5. carry out line cutting disjunction volume iron core frame at the shell of column unshakable in one's determination position of volume iron core frame suit coil, be divided into two sections U-iron hearts, 6. anxious the cutting off between face silicon steel strap of U-iron carried out insulation processing, 7. when the coil of transformer and assembling unshakable in one's determination, the interface insulation processing, the recovery volume iron core frame becomes complete annular closed magnetic circuit.
2, volume according to claim 1 manufacture method unshakable in one's determination, it is characterized in that: the silicon strip continuous reeling forms in volume iron core frame (11) process, apply low melting point silicates sealing by fusing material continuously at silicon strip (3) interlayer, the fusion of sealing by fusing material forms adhesive layer (27) between the silicon steel strap when volume iron core frame high annealing, and unshakable in one's determination being become by the silicon strip lamilated body of volume is block entity.
3, volume according to claim 1 and 2 manufacture method unshakable in one's determination, it is characterized in that: volume iron core frame (11) is applied the audio frequency exciting current, eddy current loss and magnetic hysteresis loss by magnetic circuit make iron core generate heat, and realize quick high-temp annealing, even realize the corner differential annealing.
4, volume according to claim 1 manufacture method unshakable in one's determination is characterized in that: volume iron core frame (11) behind high annealing, line cutting disjunction initial vacuum impregnating resin adhesive and cured, unshakable in one's determination being become by the silicon strip lamilated body of volume is block entity.
5, manufacture method of rolling up iron core according to claim 1 is characterized in that: volume core limb portion (2) cutting method for dividing is the machine cuts method of cutting of band saw line or circular saw cut-out; Except that the branch section that Wire EDM forms, to the further grinding machine abrasion of machine cuts section processing.
6, roll up manufacture method unshakable in one's determination according to claim 1 or 5, it is characterized in that: the cutting section of volume iron core frame (11) is realized lamination insulation by bridge circuit burr (28) between the molten disconnected silicon steel strap of electrochemical etching method of primary cell reaction.
7, roll up manufacture method unshakable in one's determination according to claim 1 or 5, it is characterized in that: the cutting section of volume iron core frame (11) opens circuit by bridge joint burr (28) between electrolytic etching method realization silicon steel strap, realize lamination insulation, the cutting section of the U-iron heart connects power anode and immerses in the electrolytic cell.
8, volume according to claim 1 manufacture method unshakable in one's determination, it is characterized in that: when the butt joint of epimere U-shaped band stem yoke (21) and hypomere U-shaped band stem yoke (22) is recovered to complete volume iron core frame annular closed magnetic circuit, between two branch section/composition surfaces (23), get involved an insulation gap thin layer at least, divide between section/composition surface (3) coated with resins bonding in case of necessity; It is the resin coating layer or the metal oxide layer of phosphate coating or curing that last yoke divides section insulating barrier (41) and following yoke to divide section insulating barrier (42); Thin layer insulation spacer (43) is that NOMEX paper or polyester non-woven fabric or fiberglass products or thin-film material or fabric or particle diameter are less than 50 μ m powder thin layers or these combinations of thin layers at interval.
9, volume according to claim 1 manufacture method unshakable in one's determination, it is characterized in that: when the butt joint of epimere U-shaped band stem yoke (21) and hypomere U-shaped band stem yoke (22) is recovered to complete volume iron core frame annular closed magnetic circuit, vertical tightening structure that the inboard T shape arm-tie (55) that applies vertical compressive stres and outside T shape arm-tie (56) formation are arranged along the shell of column direction unshakable in one's determination of volume iron core frame, meanwhile, have and provide transverse prestress restriction epimere U-shaped band stem yoke (21) and hypomere U-shaped band stem yoke (22) to divide section/composition surface (23) slippage to misplace, the clamp region that inboard T shape arm-tie (55) and outside T shape arm-tie (56) form; The position of inboard T shape arm-tie (55) and outside T shape arm-tie (56) is adjacent to unshakable in one's determination the placement, and can be placed between the two-phase individual volume iron core frame post portion (2).
10, a kind of audio frequency excitation method for annealing of rolling up iron core, it is characterized in that: apply the audio frequency exciting current by harmonic technology, the resonant operational frequency that the inductance that magnet exciting coil (12) and volume iron core frame (11) constitute needs by the method acquisition of mating resonant capacitance (14); This resonance comprises series resonance and parallel resonance mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610035356 CN1897176A (en) | 2006-05-08 | 2006-05-08 | Production of sectional scrolling iron core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610035356 CN1897176A (en) | 2006-05-08 | 2006-05-08 | Production of sectional scrolling iron core |
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| Publication Number | Publication Date |
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| CN1897176A true CN1897176A (en) | 2007-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200610035356 Pending CN1897176A (en) | 2006-05-08 | 2006-05-08 | Production of sectional scrolling iron core |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102361374A (en) * | 2011-10-28 | 2012-02-22 | 安泰科技股份有限公司 | Protective box type amorphous, microcrystal or nano-crystal alloy stator core for motor and preparation method thereof |
| CN103170680A (en) * | 2011-12-26 | 2013-06-26 | 新华都特种电气股份有限公司 | Cutting method of rolling iron core and cutting tool of rolling iron core |
| CN103181062A (en) * | 2010-08-24 | 2013-06-26 | 戴森技术有限公司 | Rotor core assembly |
| CN104252953A (en) * | 2014-06-25 | 2014-12-31 | 上海置信电气非晶有限公司 | Broken-yoke iron core of three-phase amorphous alloy transformer |
| CN104252955A (en) * | 2014-06-25 | 2014-12-31 | 上海置信电气非晶有限公司 | Broken-yoke iron core of three-phase amorphous alloy transformer |
| CN104252952A (en) * | 2014-06-25 | 2014-12-31 | 上海置信电气非晶有限公司 | Broken-yoke iron core of three-phase amorphous alloy transformer |
| CN105004182A (en) * | 2015-07-02 | 2015-10-28 | 吉林大学 | Dual-purpose electric stove for heating and excitation |
| CN108647382A (en) * | 2018-04-02 | 2018-10-12 | 西南交通大学 | A kind of assessment method of rewinding material tractive transformer eddy-current loss |
| CN109178497A (en) * | 2018-10-12 | 2019-01-11 | 上海劲兆互感器有限公司 | A kind of c-type iron core bonding packaging method |
| CN109243803A (en) * | 2018-11-22 | 2019-01-18 | 广东安沛电力有限公司 | A kind of machining manufacture of dual openings rewinding material |
| CN110399693A (en) * | 2019-07-31 | 2019-11-01 | 西南交通大学 | The calculation method of the lower transformer rewinding material eddy-current loss of short circuit between a kind of |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103181062A (en) * | 2010-08-24 | 2013-06-26 | 戴森技术有限公司 | Rotor core assembly |
| CN102361374A (en) * | 2011-10-28 | 2012-02-22 | 安泰科技股份有限公司 | Protective box type amorphous, microcrystal or nano-crystal alloy stator core for motor and preparation method thereof |
| CN103170680B (en) * | 2011-12-26 | 2016-09-07 | 新华都特种电气股份有限公司 | The cutting method of rewinding material and cutting tool thereof |
| CN103170680A (en) * | 2011-12-26 | 2013-06-26 | 新华都特种电气股份有限公司 | Cutting method of rolling iron core and cutting tool of rolling iron core |
| CN104252953A (en) * | 2014-06-25 | 2014-12-31 | 上海置信电气非晶有限公司 | Broken-yoke iron core of three-phase amorphous alloy transformer |
| CN104252955A (en) * | 2014-06-25 | 2014-12-31 | 上海置信电气非晶有限公司 | Broken-yoke iron core of three-phase amorphous alloy transformer |
| CN104252952A (en) * | 2014-06-25 | 2014-12-31 | 上海置信电气非晶有限公司 | Broken-yoke iron core of three-phase amorphous alloy transformer |
| CN105004182A (en) * | 2015-07-02 | 2015-10-28 | 吉林大学 | Dual-purpose electric stove for heating and excitation |
| CN108647382A (en) * | 2018-04-02 | 2018-10-12 | 西南交通大学 | A kind of assessment method of rewinding material tractive transformer eddy-current loss |
| CN109178497A (en) * | 2018-10-12 | 2019-01-11 | 上海劲兆互感器有限公司 | A kind of c-type iron core bonding packaging method |
| CN109243803A (en) * | 2018-11-22 | 2019-01-18 | 广东安沛电力有限公司 | A kind of machining manufacture of dual openings rewinding material |
| CN110399693A (en) * | 2019-07-31 | 2019-11-01 | 西南交通大学 | The calculation method of the lower transformer rewinding material eddy-current loss of short circuit between a kind of |
| CN110399693B (en) * | 2019-07-31 | 2022-06-07 | 西南交通大学 | Method for calculating eddy current loss of wound core of transformer under inter-chip short circuit |
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