CN102983654A - 6 kilovolt level high-voltage motor insulation structure and manufacturing method thereof - Google Patents
6 kilovolt level high-voltage motor insulation structure and manufacturing method thereof Download PDFInfo
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- CN102983654A CN102983654A CN2012101628023A CN201210162802A CN102983654A CN 102983654 A CN102983654 A CN 102983654A CN 2012101628023 A CN2012101628023 A CN 2012101628023A CN 201210162802 A CN201210162802 A CN 201210162802A CN 102983654 A CN102983654 A CN 102983654A
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Abstract
The invention discloses a 6 kilovolt level high-voltage motor insulation structure and a manufacturing method of the insulation structure. The insulation structure comprises an electromagnetic coil provided with a guide line insulating layer, and a main insulating layer manufactured on the electromagnetic coil in a winding mode. Epoxy acid anhydride type impregnating resin condensates are arranged in a gap between the guide line insulating layer on the electromagnetic coil and the main insulating layer. The 6 kilovolt level high-voltage motor insulation structure and the manufacturing method of the insulation structure have the advantages that insulating strength of the guide line insulating layer and the main insulating layer are both greatly promoted, but insulating thickness of the guide line insulating layer and the main insulating layer are obviously thinned.
Description
Technical field
The present invention relates to rated voltage and be the high-voltage motor insulated manufacturing field of the F level attenuate insulation of 6kV level (containing rated voltage is 6.0kV, 6.3kV, 6.6kV), be specifically related to the insulation system that uses on the attenuate insulation high-voltage motor of a kind of 6kV level (containing rated voltage is 6.0kV, 6.3kV, 6.6kV) and the manufacture method of this insulation system.
Background technology
Though the generation of motor has over one hundred year history, but operation principle and basic structure do not have significant change always, the progress of manufacturing technology and development are mainly reflected in cooling system and insulation technology two aspects, and one of major influence factors of motor service life is electrical machine insulation, do not rant out, insulation namely is " heart " of motor.
In the manufacturing field of at present F level medium-sized high-pressure electrical machinery insulation, vacuum pressure impregnation technology (i.e. " VPI " technology) is most widely used general, the state-of-the-art insulation manufacturing technology of technology of generally acknowledging at present.At home, before more than two decades, just begun to use the technology path of " the whole VPI of soaking of middle glue " as the major technique of electrical machine insulation manufacturing and insulation processing, over past ten years, because making constant progress of technology, external comparatively advanced " few whole VPI that soaks of glue " technology is also used at home more and more widely.At present domestic on the industrially preparing process in this field, be above two kinds of technology paths and the situation of depositing basically.
But, producer at home, no matter be " the whole VPI of soaking of middle glue " of maturation application, still " few whole VPI that soaks of glue " technology of progressively promoting, all owing to exist shortcomings: the dielectric strength such as electrical machine insulation is lower, insulation thickness is thicker, motor operation temperature rise, product uses and service life is short etc.This is mainly owing to general not high the causing of employed insulating material technical merit in the V PI technology, and, because motor manufacturing enterprise too pays attention to low price and the operative weldability of insulating material, thereby the lifting of having ignored by insulating material and insulation technology level reaches the idea of development that product quality improves, the consumption of production material therefor reduces.So, in order to guarantee the reliability service life-span of high-voltage motor, design of electrical motor personnel and electrical machine insulation engineer all follow thinking design and the production high-voltage motor product of use amount to guarantee the electrical machine insulation quality that increases insulation thickness and insulating material mostly, see that from the teeth outwards as if the cost of having saved insulating material (use cheap although do like this, the insulating material that performance is not high), but because insulation thickness is thick, corresponding design of electrical motor size and other iron and steel, the copper conductor material consumption also increases a lot, make the overall material manufacturing of motor always higher, motor size is bigger than normal, power is low, it is little to exert oneself, the overall dimension of whole motor is very large, gives the people a kind of stupid large black thick sensation.
As previously mentioned, in the development course of motor manufacturing and electrical machine insulation technology, Key Propositions from start to finish namely is: how to satisfy under the requirement of motor operation to insulation the insulation system that design and use thickness is thinner and insulating material.So the level of electrical machine insulation technology and then the technical merit that relates to motor the most intuitively index namely are insulation thicknesses.
At present domestic enterprise using " the whole VPI of soaking of middle glue " and " few whole VPI that soaks of glue " technology production 6kV level high-voltage motor, judge with insulation thickness, technical merit probably is divided into three class: first kind enterprise, One's name is legion, its insulation technology belongs to popular level, great majority use " the whole VPI of soaking of middle glue " insulation technology (minority is used " few whole VPI that soaks of glue " technology), (contain rated voltage is 6.0kV to the 6kV level that such motor manufacturing enterprise produces, 6.3kV, 6.6kV) high-voltage motor, all about 0.55 ~ 0.60mm, main insulation thickness is about 1.7 ~ 2.0mm for its turn-to-turn insulation thickness; Equations of The Second Kind enterprise, progress along with insulation technology, quantity progressively increases, its technical merit development is relatively high, the time of being constructed and put into operation is late and utilize newcoming advantage to use advanced insulating material and the technology of part, normal operation " few the whole VPI that soaks of glue " technology, the insulation thickness of its 6kV level (containing rated voltage is 6.0kV, 6.3kV, 6.6kV) high-voltage motor is in 0.50 ~ 0.55mm(turn-to-turn insulation) and 1.3 ~ 1.6mm(main insulation) level; The 3rd class enterprise, quantity is few, belong to the leading enterprise of industry technology (at present domestic only have 1 ~ 2), the 6kV level high-voltage motor that this enterprise produces also uses " few whole VPI of soaking of glue " technology, insulation thickness is (turn-to-turn insulation) and 1.04 ~ 1.30mm(main insulation about 0.43mm), be the thinnest in the high-voltage motor of this electric pressure of present domestic production.But, because quality stability and the insulation margin of this production insulation system still have part not fully up to expectations, so the 6kV level high-voltage motor output of this kind thin insulating structure that this factory produces is less, do not become the main force of this factory in this electric pressure product always.
Patent retrieval finds there is one and is called that " reduction insulation structure and the insulating treatment method that are applicable to high-voltage motor ", number of patent application are 201010214455.5 bibliographical information at home, speak of in the document at insulating barrier and use polyester film-backed dry mica tape, wrapped 4 layers, form the insulating barrier that theoretical insulation thickness is 1.04mm, process through epoxidized unsaturated ester system impregnating resin VPI, baked and cured, the puncture voltage of testing coil is between 45kV ~ 46kV; Another kind of insulation system, use polyester film-backed dry mica tape and glass cloth reinforcement dry mica paper tape bi-material, mix wrapped 5 layers, form the insulating barrier that theoretical insulation thickness is 1.30mm, process through epoxidized unsaturated ester system impregnating resin VPI, baked and cured, the puncture voltage of testing coil be (mica tape that uses in two kinds of insulation system insulation against ground layers all should be thickness according to the description of the document and is the dry mica paper tape of 0.13mm) between 53kV ~ 58kV; Above-mentioned two kinds of coils of mentioning in this patent are judged according to the former JB/T50133-1999 of Ministry of Machine-Building Industry standard-required, the result is qualified, should be no less than 42kV but the criterion of acceptability of breakdown voltage that requires 6kV level high-voltage motor in this standard is minimum, and the puncture voltage nargin in document embodiment and little, when using the insulation system of 1.04mm thickness, situation is especially obvious, only than the high 3 ~ 4kV of standard.So, by the batch production of the method (insulation system that 1.04mm is thick) of this document make high-voltage motor insulated may be very little, the mass deviation that produces when considering batch production, the insulation level that may have coil sections is relatively more dangerous.So the insulation system in the document only has the possibility of larger insulation margin and batch production when insulation thickness is 1.3mm.
Summary of the invention
For the above-mentioned problems of the prior art of mentioning, the objective of the invention is: (containing rated voltage is 6.0kV to propose a kind of 6kV level, 6.3kV, 6.6kV) insulation system and the manufacture method of high-voltage motor, vivid to change generally falling behind of China's high-voltage motor, it mainly is by promoting the insulation level of insulating material, the gauge of attenuate individual event material, thereby the electrical strength of insulation system is significantly promoted, the gross thickness of insulation significantly reduces, and reaches optimal design and the high quality of production of motor, dwindle motor volume and size, save to produce and use material, the power of motor output of similar sizes promotes, the motor of same capability dwindles the effect of motor size.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of insulation system of 6kV level high-voltage motor, comprise the solenoid that contains wire insulation, be wound in the main insulating layer on the solenoid, the epoxy anhydride type impregnating resin solidfied material that contains in the wire insulation on the above-mentioned solenoid and the space of main insulating layer.
Described solenoid is formed according to the some circles of designing requirement coiling by the winding copper strap wire.
Described winding copper strap wire contains wire insulation, and wire insulation is to be the some layers of the flat bag of polyester film dry mica of 0.070 ± 0.005mm by thickness, forms to have the insulating barrier that bilateral insulation thickness is 0.35mm ~ 0.40mm.
Described on the winding copper strap wire thickness of the polyester film dry mica of wrapped use be 0.070 ± 0.005mm, wherein comprise polyester film, mica paper and adhesive.
Polyester film in the polyester film dry mica of described wrapped use on the winding copper strap wire is that thickness is that 0.030 ± 0.003mm, weight per unit area are 42 ± 5g, the electric insulation polyester film that made by PETG.
Described on the winding copper strap wire mica paper in the wrapped polyester film dry mica that uses be the non-calcinated type white powder mica paper of 58 ± 10g as weight per unit area.
Adhesive in the polyester film dry mica of described wrapped use on the winding copper strap wire is for containing at least the adhesive of bisphenol A type epoxy resin and zinc salts of organic acid compound, and the content of adhesive is 2% ~ 12% of described mica tape total weight.
Described main insulating layer is to adopt the some layers of mode stacked package of 50% stacked package formed by polyester film dry mica, and thickness is the insulating barrier of 0.6mm ~ 1.0mm.
The thickness of the polyester film dry mica that uses in the described main insulating layer is 0.09 ± 0.01mm, wherein comprises polyester film, mica paper and adhesive.
Polyester film in the polyester film dry mica that uses in the described main insulating layer is that 0.030 ± 0.003mm, weight per unit area are 42 ± 5g, the electric insulation polyester film that made by PETG as thickness.
Mica paper in the polyester film dry mica that uses in the described main insulating layer is the non-calcinated type white powder mica paper of 88 ± 10g as weight per unit area.
Adhesive in the polyester film dry mica that uses in the described main insulating layer is for containing at least the adhesive of bisphenol A type epoxy resin and zinc salts of organic acid compound, and the content of adhesive is 2% ~ 12% of described mica tape total weight.
The epoxy anhydride type impregnating resin solidfied material that contains in wire insulation on the described solenoid and the space of main insulating layer, to flood epoxy anhydride type impregnating resin at coil through the vacuum pressure impregnation mode, make wire insulation, the slight void in the main insulating layer of solenoid all be filled full this kind resin, and the resin cured matter that obtains by heating baked and cured.
Above-mentioned epoxy anhydride type impregnating resin is that key component is two kinds: a kind of is the bisphenol A type epoxy resin of epoxide number 〉=0.56 equivalent/100g, and another kind is methylhexahydrophthalic anhydride, more than two kinds of components account for 80 ~ 90% of impregnating resin total weight.
Another technical scheme of the present invention provides the insulation system manufacture method of inner a kind of 6kV level high-voltage motor, comprises the steps:
A. use to have the some layers of the flat bag of polyester film dry mica that thickness is 0.070 ± 0.005mm, form that to have bilateral insulation thickness be that the winding copper strap wire of wire insulation of 0.35mm ~ 0.40mm is as material coiling solenoid.
Wherein, the polyester film powder mica tape that uses in the winding copper strap wire comprises polyester film, mica paper and adhesive:
1. polyester film: thickness is that 0.030 ± 0.003mm, weight per unit area are 42 ± 5g, the electric insulation polyester film that made by PETG; 2. mica paper: weight per unit area is the non-calcinated type white powder mica paper of 58 ± 10g; 3. adhesive: content accounts for 2% ~ 12% of this mica tape total weight, contains at least the adhesive of bisphenol A type epoxy resin and zinc salts of organic acid compound.
B. after stating in the use the steps formation stator coils such as the coiling of winding copper strap wire process, the type that rises integer, on solenoid the some layer thicknesses of 50% stacked package be 0.09 ± 0.01mm polyester film powder mica tape, to form insulation thickness be the insulating barrier of 0.6mm ~ 1.0mm, with this as main insulating layer.
Wherein, the polyester film dry mica that uses in the main insulating layer contains polyester film, mica paper and adhesive:
1. polyester film: thickness is that 0.030 ± 0.003mm, weight per unit area are 42 ± 5g, the electric insulation polyester film that made by PETG; 2. mica paper: weight per unit area is the non-calcinated type white powder mica paper of 88 ± 10g; 3. adhesive: content accounts for 2% ~ 12% of this mica tape total weight, contains at least the adhesive of bisphenol A type epoxy resin and zinc salts of organic acid compound.
C. will be assembled to through the solenoid after the c step in the stator core, through forming the stator winding of motor after fixing, the wiring colligation.
D. the stator winding in the c step being used epoxy anhydride type impregnating resin to carry out vacuum pressure impregnation processes, make and fill full above-mentioned impregnating resin in the insulating barrier of each coil of winding, then stator winding is heated in baker and bake and bank up with earth curing, make resin and the common insulation system that consists of of the mica tape in the insulating barrier in the insulating barrier settable cementitious as a whole, form the motor stator winding with insulation effect.
The invention has the beneficial effects as follows:
Insulation system of the present invention, the dielectric strength of wire insulation has a distinct increment, the obvious attenuate of the insulation thickness of wire insulation.
In the present invention, the used winding copper strap wire of coiling is the polyester film powder mica tape copper flat wire wrapped, and this type of electromagnetic wire has promoted the puncture voltage of insulating barrier in the attenuate insulation.And in conventional art, especially the enterprise that technical merit is not high (being typically the most the above-mentioned first kind and Equations of The Second Kind enterprise), its employed winding copper strap wire is generally following several: 1. single glass fibre bag polyimide film copper flat wire wrapped, 2. double glass fiber bag polyimide film copper flat wire wrapped, 3. tack glass fiber bag polyimide film copper flat wire wrapped, 4. tack glass fiber bag polyimide film copper flat wire wrapped.The extensive use of above-mentioned several copper strap wires is mainly based on following reason: 1. the dipping lacquer glass fiber of outsourcing is conducive to prevent the damage of wire insulation in making the coil process after holding the copper strap wire skin; 2. because the copper strap wire inner insulating layer is the polyimide film of half-stack package, electric property is relatively better under regular situation, can meet the demands in conjunction with outer field dipping lacquer ferry glass insulation effect; 3. between 0.040mm ~ 0.060mm, insulation thickness is moderate mostly for the wire insulation thickness on the copper strap wire of the type.
But, if want the thickness of the above-mentioned wire insulation of attenuate, these several copper strap wires have just shown some limitations: 1. the Main Function of the dipping lacquer glass fiber of such copper strap wire outsourcing is to improve the resistance to wear of wire and a small amount of insulating strength is provided, and the winding copper strap wire of this class formation can avoid copper strap wire to be subject to the damage of colliding with and bringing owing to machinery greatly, but not high to the stiffening effect of insulation; 2. the main material that plays insulating effect is half polyimide film that repeatedly wraps on the copper strap wire, in this case, in using such copper strap wire making solenoid process, when especially copper strap wire produces bending according to designing requirement, the glass fiber that is in bending radius cylindrical side is a small amount of cracking owing to stretching action produces, and dielectric strength is herein only born by the polyimide film of inner insulating layer and seemed comparatively weak; 3. if still with the example of above-mentioned copper strap wire bending, the half-stack package polyimide film of the bending radius outside, inner insulating layer is subject to stretching action equally, thereby make the local state that is in less than half-stack package of insulation, having produced only has polyimide film that one deck is stretched as the situation of insulating barrier, and then the nargin of wire insulation is further reduced; 4. based on above-mentioned principle, wrapped glass fiber mainly provides mechanical reinforcement and insulating strength seldom is provided, but importantly it has occupied most copper strap wire insulation thickness, and this situation is very unfavorable to attenuate insulation thickness on the basis that guarantees dielectric strength.
Based on above reason, we have designed thickness is the above several copper strap wires commonly used of polyester film dry mica copper flat wire wrapped replacement of 0.070 ± 0.005mm, suppose that this mica tape adopts the mode of three layers of flat bag, then the insulation thickness of this copper strap wire is 0.42mm in theory, but, consider when wrapped mica tape to cause the attenuation of mica tape thickness owing to stretch, then actual insulation thickness is only between 0.35mm ~ 0.40mm.
The main advantage of wire insulation is embodied among the present invention: 1. the wrapped mica paper tape of every one deck all has good insulation property, and all material of whole insulating barrier all can provide good insulating strength; 2. the wrapped mica paper tape of every one deck all can reach with polyimide film and be equal to even better dielectric strength, this is because mica tape not only contains insulation film, and contain the inorganic insulating material that micropore is beneficial to dipping that is rich in of this excellent performance of mica powder, especially after processing through vacuum pressure impregnation (VPI) technique and being heating and curing, all micropores in the whole insulating barrier all can be impregnated resin cured matter fill full, so reduced to the full extent because the impact that the dielectric strength that the copper strap wire bending is stretched insulating barrier to be caused descends; 3. just be based on above 2 points, making the insulating barrier on the copper strap wire have better electrical strength, thus for satisfy same performance require under attenuate wire insulation thickness provide may.By the present invention, the wire insulation thickness of every copper strap wire all is reduced to 0.35mm ~ 0.40mm from 0.40mm ~ 0.60mm, every reduced 0.10mm(in the insulation thickness of prior art by 0.50mm, insulation thickness of the present invention according to 0.40mm meter), if calculate and arrange 16 circles with 2 of comparatively simple solenoid, then only the minimizing of the solenoid sectional dimension brought of wire insulation attenuate is namely considerable, reduced 1.60mm on the short transverse, reduced 0.20mm on the Width, the thickness of wire insulation attenuate accounts for 20% of insulation thickness in the conventional art.
Insulation system of the present invention, the dielectric strength of main insulating layer has a distinct increment, the obvious attenuate of the insulation thickness of main insulating layer.
In the present invention, what the main insulating layer of solenoid used is that thickness is the polyester film dry mica of 0.09 ± 0.01mm, this main insulation in the conventional art (is generally obviously attenuate of 0.13mm ± 0.02mm) with mica tape, suppose thus the wrapped number of plies of the main insulating layer among the present invention and the wrapped number of plies identical (the hypothetical layer number average is n) in the conventional art, then the thickness of whole insulating barrier can be at attenuate on the basis of original technology about the 30% ((thickness 0.13 * 2n of thickness 0.09 * 2n)/prior art mica tape of thickness 0.13 * 2n-the technology of the present invention mica tape of prior art mica tape * 100%=30.8%).In actual applications, insulation system of the present invention is applied to the test of 6kV HV Electric Machine Coil, compare with the insulation thickness of conventional art and to have obvious advantage: insulation thickness is thinned to 0.6mm ~ 1.0mm from 1.3 ~ 2.0mm of existing general application technology, and the amplitude of insulation attenuate is generally at 23%((1.3-1.0)/1.3 * 100%=23.1%) to 60%((2.0-0.6)/2.0 * 100%=60%) between.On the other hand, technical scheme of the present invention confirms through electrical test, insulation system of the present invention has good electric property and than the larger insulation margin of conventional art, the puncture voltage of insulation system can be above standard and require about 20kV, disruptive field intensity is that standard is graded more than the twice of high-class product in the requirement, even considering insulation system of the present invention uses later in the actual electrical machine insulation production, have because certain fluctuation appears in the dispersiveness of production technology, but insulation margin provided by the invention is also larger.
Can find out by above 2, application by the technology of the present invention, can significantly reduce the use amount of insulating material, further, optimization by design of electrical motor, be used in the metal material in the motor manufacture process, comprise that the general expenses of the various materials such as copper conductor, silicon steel sheet, steel structural part, support, welding material, cooler and corollary equipment and the man-hour that brings, processing charges is also obviously saved.Through rough calculating, a 6kV level high-voltage motor, insulation thickness reduces 20 ~ 30%, will impel the motor overall volume to reduce, and generally can reduce 5% ~ 12% of the various material cost summations of motor in producing.
Description of drawings
Fig. 1 is the cross-sectional view of the coil straight line portion of the high-voltage motor insulated structure of 6kV level.
Wherein: 1-solenoid, 2-main insulating layer, the 3-surface protecting layer of wire insulation contained.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.
Such as Fig. 1: a kind of insulation system of 6kV level high-voltage motor comprises the solenoid 1 that contains polyester film dry mica and epoxy anhydride type impregnating resin solidfied material and consist of wire insulation, is wound in the outer main insulating layer 2 that is made of polyester film dry mica and epoxy anhydride type impregnating resin solidfied material of solenoid and is wound in main insulating layer surface protecting layer 3 outward.
Described solenoid 1 is formed according to the some circles of designing requirement coiling by the winding copper strap wire.
Winding copper strap wire in the described solenoid 1 contains wire insulation, and wire insulation is to be the some layers of the flat bag of polyester film dry mica of 0.070 ± 0.005mm by thickness, forms to have the insulating barrier that bilateral insulation thickness is 0.35mm ~ 0.40mm.
The thickness of the polyester film dry mica of wrapped use on the winding copper strap wire in the described solenoid 1 is 0.070 ± 0.005mm, wherein comprises polyester film, mica paper and adhesive.
Polyester film in the polyester film dry mica of the wrapped use on the winding copper strap wire in the described solenoid 1 is that thickness is that 0.030 ± 0.003mm, weight per unit area are 42 ± 5g, the electric insulation polyester film that made by PETG.
The mica paper in the wrapped polyester film dry mica that uses on the winding copper strap wire in the described solenoid 1 is the non-calcinated type white powder mica paper of 58 ± 10g as weight per unit area.
Adhesive in the polyester film dry mica of the wrapped use on the winding copper strap wire in the described solenoid 1 is for containing at least the adhesive of bisphenol A type epoxy resin and zinc salts of organic acid compound, and the content of adhesive is 2% ~ 12% of described mica tape total weight.
Described main insulating layer 2 is to adopt the some layers of mode stacked package of 50% stacked package formed by polyester film dry mica, and thickness is the insulating barrier of 0.6mm ~ 1.0mm.
The thickness of the polyester film dry mica that uses in the described main insulating layer 2 is 0.09 ± 0.01mm, wherein comprises polyester film, mica paper and adhesive.
Polyester film in the polyester film dry mica that uses in the described main insulating layer 2 is that 0.030 ± 0.003mm, weight per unit area are 42 ± 5g, the electric insulation polyester film that made by PETG as thickness.
Mica paper in the polyester film dry mica that uses in the described main insulating layer 2 is the non-calcinated type white powder mica paper of 88 ± 10g as weight per unit area.
Adhesive in the polyester film dry mica that uses in the described main insulating layer 2 is for containing at least the adhesive of bisphenol A type epoxy resin and zinc salts of organic acid compound, and the content of adhesive is 2% ~ 12% of described mica tape total weight.
The epoxy anhydride type impregnating resin solidfied material that contains in wire insulation on the described solenoid 1 and the space of described main insulating layer 2, to flood epoxy anhydride type impregnating resin at coil through the vacuum pressure impregnation mode, make wire insulation, the slight void in the main insulating layer of solenoid all be filled full this kind resin, and the resin cured matter that obtains by heating baked and cured.
Above-mentioned epoxy anhydride type impregnating resin is that key component is two kinds: a kind of is the bisphenol A type epoxy resin of epoxide number 〉=0.56 equivalent/100g, and another kind is methylhexahydrophthalic anhydride, more than two kinds of components account for 80 ~ 90% of impregnating resin total weight.
Described surface protecting layer is low-resistance corona-prevention belt.
The manufacture method of the high-voltage motor insulated structure of a kind of 6kV level (containing rated voltage is 6.0kV, 6.3kV, 6.6kV) comprises the steps:
A. use to have the some layers of the flat bag of polyester film dry mica that thickness is 0.070 ± 0.005mm, form that to have bilateral insulation thickness be that the winding copper strap wire of wire insulation of 0.35mm ~ 0.40mm is as material coiling solenoid.
Wherein, the polyester film powder mica tape that uses in the winding copper strap wire comprises polyester film, mica paper and adhesive:
1. polyester film: thickness is that 0.030 ± 0.003mm, weight per unit area are 42 ± 5g, the electric insulation polyester film that made by PETG; 2. mica paper: weight per unit area is the non-calcinated type white powder mica paper of 58 ± 10g; 3. adhesive: content accounts for 2% ~ 12% of this mica tape total weight, contains at least the adhesive of bisphenol A type epoxy resin and zinc salts of organic acid compound.
B. after stating in the use the steps formation stator coils such as the coiling of winding copper strap wire process, the type that rises integer, on solenoid the some layer thicknesses of 50% stacked package be 0.09 ± 0.01mm polyester film powder mica tape, to form insulation thickness be the insulating barrier of 0.6mm ~ 1.0mm, with this as main insulating layer.
Wherein, the polyester film dry mica that uses in the main insulating layer contains polyester film, mica paper and adhesive:
1. polyester film: thickness is that 0.030 ± 0.003mm, weight per unit area are 42 ± 5g, the electric insulation polyester film that made by PETG; 2. mica paper: weight per unit area is the non-calcinated type white powder mica paper of 88 ± 10g; 3. adhesive: content accounts for 2% ~ 12% of this mica tape total weight, contains at least the adhesive of bisphenol A type epoxy resin and zinc salts of organic acid compound.
C. will be assembled to through the solenoid after the c step in the stator core, through forming the stator winding of motor after fixing, the wiring colligation.
D. the stator winding in the c step being used epoxy anhydride type impregnating resin to carry out vacuum pressure impregnation processes, make and fill full above-mentioned impregnating resin in the insulating barrier of each coil of winding, then stator winding is heated in baker and bake and bank up with earth curing, make resin and the common insulation system that consists of of the mica tape in the insulating barrier in the insulating barrier settable cementitious as a whole, form the motor stator winding with insulation effect.
Embodiment:
Use insulation system of the present invention and make motor coil, use three strata ester film micas to put down and hold wire copper-clad flat line as the winding copper strap wire, the copper conductor sectional dimension is 2.2 * 5.0mm, and the bilateral insulation thickness of turn-to-turn is 0.40mm.Through double and after 10 circles, the gel of the type that rises turn-to-turn, wrapped thickness is 5 layers of the polyester film dry micas of 0.09mm, take this as main insulating layer (its insulation thickness is as 0.90mm), then wrap low-resistance corona-prevention belt and high resistance corona-prevention belt, after the vacuum pressure impregnation baked and cured, its slot coil overall size is 12.76mm * 27.96mm, and the slot part total sectional area is about 356.8mm
2, wherein the copper conductor total sectional area is 220mm
2, copper conductor sectional area the line is busy 61.7% of ring recess section total sectional area.
If with traditional motor coil as a comparison, suppose that the techniques such as copper conductor size, winding mode VPI dipping lacquer are just the same, use bilateral turn-to-turn insulation to be 7 layers of adhesive-contented mica tapes in the expoxy glass of 0.13mm as the winding wire of 0.5mm, wrapped thickness, with this as main insulating layer, (its insulation thickness is 1.8mm), its slot coil is of a size of 14.76mm * 30.76mm, and the slot part total sectional area is about 454.0mm
2, wherein the copper conductor total sectional area is 220mm
2, the copper conductor sectional area accounts for 48.5% of total sectional area.
Carry out instantaneous frequency breakdown voltage test with each three of above-mentioned two kinds of coils again, result such as following table 1:
Table 1:
By above contrast test, can see following variation through calculating:
A is in the constant situation of conductor area, the long-pending coil than the conventional art Comparative Examples of the coil section of the embodiment of the invention reduces 21.4%, estimate that the weight that every employed insulating material of coil is saved probably is more than 53% of insulating material of conventional art Comparative Examples coil consumption, illustrates that the material of present embodiment is saved very obvious.
B is in performance test, the puncture voltage average of embodiment of the invention coil is high by 24.8% than conventional coil as can be known by test data, illustrate that the insulation system in the embodiment of the invention has than the higher insulation margin of conventional art Comparative Examples structure, it is higher to the quality assurance degree of motor product to insulate; And the mean value of embodiment of the invention coil disruptive field intensity is high by 149.5% than the coil of conventional art Comparative Examples, illustrates that the insulation system performance in the present embodiment promotes fairly obvious than comparison structure.
C. embodiment of the invention coil and the employed material of conventional art Comparative Examples coil are respectively adhesive-contented mica tape in the thick expoxy glass of the thick polyester film-backed dry mica tape of 0.90mm and 0.13mm, in two kinds of mica tapes, the mica tape of the embodiment of the invention obviously is thinner than the mica tape that uses in the conventional art Comparative Examples, and the insulation number of plies of Mica tape only is 5 layers in the embodiment of the invention, and the conventional art Comparative Examples coil lapped insulation number of plies reaches 7 layers, so the production efficiency of embodiment of the invention coil obviously promotes.
The above-described preferred embodiment of utilizing describes the present invention in detail, but not limits the scope of the invention.Those skilled in the art can make trickle change and adjustment by after reading the present invention, and the main idea of the present invention of will can yet be regarded as place does not also break away from the spirit and scope of the present invention.
Claims (9)
1. the insulation system of a 6kV level high-voltage motor, it is characterized in that, comprise the solenoid that contains wire insulation, be wound in the main insulating layer on the solenoid, the epoxy anhydride type impregnating resin solidfied material that contains in the wire insulation on the above-mentioned solenoid and the space of main insulating layer; Described solenoid is formed by the some circles of winding copper strap wire coiling; Described winding copper strap wire contains wire insulation, and wire insulation is to be the some layers of the flat bag of polyester film dry mica of 0.070 ± 0.005mm by thickness, forms to have the insulating barrier that bilateral insulation thickness is 0.35mm ~ 0.40mm; Described on the winding copper strap wire thickness of the polyester film dry mica of wrapped use be 0.070 ± 0.005mm, wherein comprise polyester film, mica paper and adhesive; Described main insulating layer is to adopt the some layers of mode stacked package of 50% stacked package formed by polyester film dry mica, and thickness is the insulating barrier of 0.6mm ~ 1.0mm; The thickness of the polyester film dry mica that uses in the described main insulating layer is 0.09 ± 0.01mm, wherein comprises polyester film, mica paper and adhesive.
2. the insulation system of a kind of 6kV level high-voltage motor as claimed in claim 1, it is characterized in that the polyester film in the polyester film dry mica of described wrapped use on the winding copper strap wire is that thickness is that 0.030 ± 0.003mm, weight per unit area are 42 ± 5g, the electric insulation polyester film that made by PETG.
3. the insulation system of a kind of 6kV level high-voltage motor as claimed in claim 1, it is characterized in that, described on the winding copper strap wire mica paper in the wrapped polyester film dry mica that uses be the non-calcinated type white powder mica paper of 58 ± 10g as weight per unit area.
4. the insulation system of a kind of 6kV level high-voltage motor as claimed in claim 1, it is characterized in that, adhesive in the polyester film dry mica of described wrapped use on the winding copper strap wire is for containing at least the adhesive of bisphenol A type epoxy resin and zinc salts of organic acid compound, and the content of adhesive is 2% ~ 12% of described mica tape total weight.
5. the insulation system of a kind of 6kV level high-voltage motor as claimed in claim 1, it is characterized in that the polyester film in the polyester film dry mica that uses in the described main insulating layer is that 0.030 ± 0.003mm, weight per unit area are 42 ± 5g, the electric insulation polyester film that made by PETG as thickness.
6. the insulation system of a kind of 6kV level high-voltage motor as claimed in claim 1 is characterized in that, the mica paper in the polyester film dry mica that uses in the described main insulating layer is the non-calcinated type white powder mica paper of 88 ± 10g as weight per unit area.
7. the insulation system of a kind of 6kV level high-voltage motor as claimed in claim 1, it is characterized in that, adhesive in the polyester film dry mica that uses in the described main insulating layer is for containing at least the adhesive of bisphenol A type epoxy resin and zinc salts of organic acid compound, and the content of adhesive is 2% ~ 12% of described mica tape total weight.
8. the insulation system of a kind of 6kV level high-voltage motor as claimed in claim 1, it is characterized in that, the epoxy anhydride type impregnating resin solidfied material that contains in wire insulation on the described solenoid and the space of main insulating layer, to flood epoxy anhydride type impregnating resin at coil through the vacuum pressure impregnation mode, make wire insulation, the slight void in the main insulating layer of solenoid all be filled full this kind resin, and the resin cured matter that obtains by heating baked and cured.
9. the insulation system manufacture method of a 6kV level high-voltage motor is characterized in that, comprises the steps:
A. use to have the some layers of the flat bag of polyester film dry mica that thickness is 0.070 ± 0.005mm, form that to have bilateral insulation thickness be that the winding copper strap wire of wire insulation of 0.35mm ~ 0.40mm is as material coiling solenoid;
Wherein, the polyester film powder mica tape that uses in the winding copper strap wire comprises polyester film, mica paper and adhesive:
Polyester film: thickness is that 0.030 ± 0.003mm, weight per unit area are 42 ± 5g, the electric insulation polyester film that made by PETG;
Mica paper: weight per unit area is the non-calcinated type white powder mica paper of 58 ± 10g;
Adhesive: content accounts for 2% ~ 12% of this mica tape total weight, contains at least the adhesive of bisphenol A type epoxy resin and zinc salts of organic acid compound;
B. after stating in the use the steps formation stator coils such as the coiling of winding copper strap wire process, the type that rises integer, on solenoid the some layer thicknesses of 50% stacked package be 0.09 ± 0.01mm polyester film powder mica tape, to form insulation thickness be the insulating barrier of 0.6mm ~ 1.0mm, with this as main insulating layer;
Wherein, the polyester film dry mica that uses in the main insulating layer contains polyester film, mica paper and adhesive:
Polyester film: thickness is that 0.030 ± 0.003mm, weight per unit area are 42 ± 5g, the electric insulation polyester film that made by PETG;
Mica paper: weight per unit area is the non-calcinated type white powder mica paper of 88 ± 10g;
Adhesive: content accounts for 2% ~ 12% of this mica tape total weight, contains at least the adhesive of bisphenol A type epoxy resin and zinc salts of organic acid compound;
C. will be assembled to through the solenoid after the c step in the stator core, through forming the stator winding of motor after fixing, the wiring colligation;
D. the stator winding in the c step being used epoxy anhydride type impregnating resin to carry out vacuum pressure impregnation processes, make and fill full above-mentioned impregnating resin in the insulating barrier of each coil of winding, then stator winding is heated in baker and bake and bank up with earth curing, make resin and the common insulation system that consists of of the mica tape in the insulating barrier in the insulating barrier settable cementitious as a whole, form the motor stator winding with insulation effect.
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| CN103296811A (en) * | 2013-05-29 | 2013-09-11 | 苏州巨峰电气绝缘系统股份有限公司 | Interturn insulating structure of super-thin 6kV high-voltage motor and manufacturing method of interturn insulating structure |
| CN103401377A (en) * | 2013-07-29 | 2013-11-20 | 哈尔滨电机厂有限责任公司 | Method for manufacturing stator coil insulation structure of tidal current generator |
| CN104485767A (en) * | 2014-12-15 | 2015-04-01 | 哈尔滨电气动力装备有限公司 | High-voltage motor stator coil insulation structure and process for impregnating and curing high-voltage motor stator coil insulation structure |
| CN105262296A (en) * | 2015-11-26 | 2016-01-20 | 湘潭电机股份有限公司 | High-voltage motor stator coil insulation manufacturing method |
| CN110246633A (en) * | 2018-03-09 | 2019-09-17 | 丰田自动车株式会社 | The manufacturing method of electro-magnetic forming insulated conductor |
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| CN110246633A (en) * | 2018-03-09 | 2019-09-17 | 丰田自动车株式会社 | The manufacturing method of electro-magnetic forming insulated conductor |
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Application publication date: 20130320 |