CN203312948U - 10-kilovolt motor insulation system and interturn insulation structure thereof - Google Patents
10-kilovolt motor insulation system and interturn insulation structure thereof Download PDFInfo
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- CN203312948U CN203312948U CN2013202989349U CN201320298934U CN203312948U CN 203312948 U CN203312948 U CN 203312948U CN 2013202989349 U CN2013202989349 U CN 2013202989349U CN 201320298934 U CN201320298934 U CN 201320298934U CN 203312948 U CN203312948 U CN 203312948U
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Abstract
The utility model relates to a 10-kilovolt motor insulation system and an interturn insulation structure thereof. The interturn insulation structure comprises a wire insulation layer. The wire insulation layer comprises three layers of polyester-film dry mica tapes which are wound around a copper strap wire conductor at intervals. The gaps of the first layer, the second layer and the third layer are respectively set to X1, X2 and X3, with X1 being greater than zero but not greater than 0.1mm, X2 being greater than zero but not greater than 0.2mm, and X3 being greater than zero but not greater than 0.3mm. The gap of the first layer and the gap of the second layer are uniformly interlaced, and the gap of the second layer and the gap of the third layer are uniformly interlaced. And the distance from the gap of the first layer to the gap of the adjacent second layer, and the distance from the gap of the second layer to the gap of the adjacent third layer are both one third of the width of the polyester-film dry mica tape. The bilateral insulation thickness of the interturn insulation structure is from 0.40mm to 0.46mm. The 10-kilovolt motor insulation system and an interturn insulation structure thereof can genuinely achieve that the thickness is reduced to less than 0.46mm in a condition of guaranteeing insulating property.
Description
Technical field
The utility model belongs to the electrical machine insulation technical field, is specifically related to a kind of insulation system and turn-to-turn insulation structure thereof of 10kV level motor.
Background technology
High-power, small size is the developing direction in high-voltage motor field.Under same power, dwindle motor volume, not only can save manufacturing cost, improve the motor heat performance, reduce electric machine temperature rise; Also can reduce motor weight, be convenient to transportation, use and install.
Under same power, dwindle motor volume, it is crucial reducing insulation size (comprising turn-to-turn insulation and main insulation) raising copper factor.And the minimizing of insulation size and insulation quality and insulating reliability are conflicts.Only have scientific and reasonable insulation system just can make motor both have good performance, can meet again the needs of relatively high power and smaller size smaller.The advance of motor insulation structure and reliability are also the Reliable guarantees of motor product occupation rate of market.
High-voltage motor insulated structure mainly is comprised of turn-to-turn insulation structure, Main Insulation Structure of Electric, anti dizzy structure and protection structure, obtains after finally by whole VPI, processing, solidify.With regard to the turn-to-turn insulation structure, be mainly to be made by the insulating material copper flat wire wrapped.Up to now, generally believe that in the industry the performance of turn-to-turn insulation depends primarily on the selection of its structure and insulating material, and can not be subject to the considerable influence of the wrapped mode of insulating material.In two kinds of known wrapped modes: in stacked package mode peace packet mode, the half-stack package mode is because of its technique comparative maturity, operate simpler, and generally adopted by institute of domestic manufacturer, and flat packet mode (in same lapping layer, two adjacent limits abut against together, neither overlappingly do not stagger yet) because of be a kind of Utopian wrapped mode (in fact, because the edge of mica tape can not be Utopian straight line, but a kind of concavo-convex skewness is irregularly shaped, actual flat the hold result of bag or small stacked package mode, this small overlapping thickness can not play insulating effect, but taken the flute profile size, the attenuate that is unfavorable for the turn-to-turn insulation size) and technology controlling and process more complicated, and rarely have domestic manufacturer to adopt.Therefore, the overwhelming majority's 10kV level high-voltage motor employing at present is all stacked package mode (1/2 stacked package or 2/3 stacked package).A kind of turn-to-turn insulation structure that adopts flat packet mode is disclosed in CN202798235U up to date, wherein point out to take the polyester film low resin mica tape of flat packet mode can reduce insulation harm, but, the specific implementation method and the key parameter that in this patent, there is no open flat bag, and the wire insulation of just simply having described the winding copper strap wire is by thickness, to be the some layers of the flat bag of polyester film low resin mica tape of 0.070 ± 0.005mm, forms and have the insulating barrier that bilateral insulation thickness is 0.48-0.52mm., although this patent discloses the mode of the flat bag of polyester film low resin mica tape adopted, those skilled in the art can not repeat to implement and reach its alleged effect at this point.And as previously mentioned, common flat packet mode because in reality small overlapping be the attenuate that is unfavorable for the turn-to-turn insulation size, therefore, the structure of documents can't really realize the ultra-thin of turn-to-turn insulation.
In sum, the turn-to-turn insulation structure of existing 10kV level high-voltage motor can't really realize the attenuate of thickness under the prerequisite that guarantees insulation property.
Summary of the invention
Technical problem to be solved in the utility model is to provide and a kind ofly can and comprises the insulation system of this turn-to-turn insulation structure in the turn-to-turn insulation structure of the 10kV level high-voltage motor that guarantees really to realize under the prerequisite of insulation property reduced thickness.
For solving above technical problem, a kind of technical scheme that the utility model provides is: a kind of turn-to-turn insulation structure of ultrathin 10kV level high-voltage motor, it comprises wire insulation, wire insulation comprises wrapped multi-layered polyester film low resin mica tape on the copper strap wire conductor, the polyester film low resin mica tape comprises laminated polyester film, the mica powder ply of paper, be formed on the adhesive layer between laminated polyester film and mica powder ply of paper, particularly, described polyester film low resin mica tape also comprises the self-adhesive on the one side that deviates from described adhesive layer that is formed on described polyester film, described polyester film low resin mica tape has three layers, and it is wrapped all to take gap to hold mode, ground floor, the gap length of the second layer and the 3rd layer is made as respectively X1, X2, X3, 0<X1≤0.3mm, 0<X2≤0.3mm, 0<X3≤0.3mm, evenly stagger in the gap of ground floor and the second layer, evenly stagger in the gap of the second layer and the 3rd layer, and the distance between the gap of the gap of ground floor and the adjacent second layer, distance between the gap of the second layer and the adjacent gap of the 3rd layer be described polyester film low resin mica tape width 1/3, the bilateral insulation thickness of described turn-to-turn insulation structure is 0.40～0.46mm.
According to the utility model, the thickness of described polyester film low resin mica tape can and be preferably 0.075～0.10mm.
Preferably, the curved edge degree of described polyester film low resin mica tape is not more than 0.06mm.Because existing polyester film low resin mica tape product inevitably has the part that some are similar to burr, it is not a straight straight line that the existence of this part makes the ragged edge of the few glue mica of polyester film, but be the height shape that rises and falls, described " curved edge degree " namely refers to the distance width of the existing the widest burr in the edge of the interior polyester film low resin mica tape of 300mm length in other words between maximal margin sweep and the arc string in 300mm length.
Preferably, the curved edge degree<X1 of polyester film low resin mica tape≤0.1mm; Curved edge degree<the X2 of polyester film low resin mica tape≤0.2mm; Curved edge degree<the X3 of polyester film low resin mica tape≤0.3mm.
Preferably, described polyester film low resin mica tape is the polyester film low resin mica tape that contains promoter, and its contained promoter can be accelerated the curing rate of VPI resin, reduces the loss of VPI impregnating varnish.
Preferably, described adhesive layer consists of epoxies adhesive or modified epoxy class adhesive, and the compatibility of this adhesive and VPI impregnating varnish is better.
The another technical scheme that the utility model is taked is: a kind of insulation system of 10kV level high-voltage motor, it comprises the turn-to-turn insulation structure, Main Insulation Structure of Electric, anti dizzy structure and protection structure, described turn-to-turn insulation structure comprises wire insulation, described wire insulation comprises wrapped multi-layered polyester film low resin mica tape on the copper strap wire conductor, described polyester film low resin mica tape comprises laminated polyester film, the mica powder ply of paper, be formed on the adhesive layer between laminated polyester film and mica powder ply of paper, particularly, described polyester film low resin mica tape also comprises the self-adhesive on the one side that deviates from described adhesive layer that is formed on described polyester film, described polyester film low resin mica tape has three layers, and it is wrapped all to take gap to hold mode, ground floor, the gap length of the second layer and the 3rd layer is made as respectively X1, X2, X3, 0<X1≤0.3mm, 0<X2≤0.3mm, 0<X3≤0.3mm, evenly stagger in the gap of ground floor and the second layer, evenly stagger in the gap of the second layer and the 3rd layer, and the distance between the gap of the gap of ground floor and the adjacent second layer, distance between the gap of the second layer and the adjacent gap of the 3rd layer be described polyester film low resin mica tape width 1/3, the bilateral insulation thickness of described turn-to-turn insulation structure is 0.40～0.46mm.。
Preferably, the thickness of described polyester film low resin mica tape is that 0.075～0.10mm, curved edge degree are not more than 0.06mm.Described adhesive layer consists of epoxies adhesive or modified epoxy class adhesive.
Preferably, described Main Insulation Structure of Electric comprises the first polyester film reinforcement low resin mica tape layer, the first glass cloth reinforcement low resin mica tape layer, the second polyester film reinforcement low resin mica tape layer and the second glass cloth reinforcement low resin mica tape layer be wound in successively on solenoid.
Further preferably, the monolateral thickness of described Main Insulation Structure of Electric is 1.80～1.88mm.
Enforcement due to above technical scheme, the utility model compared with prior art has following beneficial effect: the insulating layer of conductor of turn-to-turn insulation structure of the present utility model is that three strata ester film low resin mica tapes require gap to hold according to certain interval to form, on the one hand, take gap to hold mode, with traditional stacked package mode or flat packet mode, compare, damage ratio obviously reduces, reason is, no matter be stacked package or flat bag, each of mica tape in same layer is between wrapped week, the restriction mutually between layers of different lapping layers, when bending, can not freely extend and increase the degree of injury of mica, and gap Bao Ze is just in time opposite, during the bag of gap, with gapped between each wrapped week in layer, can move freely, slippage mutually between different layers, reduce insulation harm.On the other hand, the distance that gap holds between each lamellar spacing of mode and gap is carried out to comprehensive Design, the Inter-turn Short Circuit Phenomenon of having avoided the gap bag to cause.Due to the design of said structure, make and can under the prerequisite of insulation property, the bilateral insulation thickness of turn-to-turn insulation be thinned to below 0.46mm guaranteeing, the minimum 0.40mm that is reduced to, realize the ultrathin of turn-to-turn insulation structure.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, utility model is described further:
Fig. 1 is the structural representation of wire insulation of the turn-to-turn insulation structure of 10kV level high-voltage motor of the present utility model;
Fig. 2 forms the structural representation of the polyester film low resin mica tape of wire insulation in Fig. 1;
Wherein: 1, copper strap wire conductor; 2, ground floor polyester film low resin mica tape; 3, second layer polyester film low resin mica tape; 4, the 3rd strata ester film low resin mica tape; 5, polyester rete; 6, mica powder ply of paper; 7, adhesive layer; 8, self-adhesive.
Embodiment
Below in conjunction with specific embodiment, such scheme is described further.Should be understood that these embodiment are not limited to limit scope of the present utility model be used to the utility model is described.The implementation condition adopted in embodiment can be done further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in normal experiment.
As shown in Figure 1, the present embodiment provides a kind of turn-to-turn insulation structure of 10kV level high-voltage motor, and it comprises wire insulation, and wire insulation consists of wrapped three strata ester film low resin mica tapes 2,3,4 on copper strap wire conductor 1.
As shown in Figure 2, different from the polyester film low resin mica tape that traditional turn-to-turn insulation structure adopts, the polyester film low resin mica tape 2 that the present embodiment adopts, 3,4 except comprising polyester rete 5, mica powder ply of paper 6, being formed on the adhesive layer 7 between laminated polyester film 5 and mica powder ply of paper 6, also comprises the self-adhesive 8 on the reverse side that is coated in polyester rete 5.Control the content of self-adhesive 8 well, the infiltration of the discharge of gas and insulating resin while not only helping motor VPI, and can guarantee well the globality of whole insulation system after VPI.The performance of the polyester film low resin mica tape adopted is as follows: mica is quantitatively 70 ± 5g/m
2, adhesive (epoxies or modified epoxy class) is quantitatively 4 ± 2g/m
2, accelerator content is 350 ± 150mg/m
2, self-adhesive content 1.8 ± 0.5%, the curved edge degree is not more than 0.06mm.
Also different from traditional turn-to-turn insulation structure is that in the present embodiment, three strata ester film low resin mica tapes are according to specifically requiring gap to be paperwrapped on copper strap wire conductor 1.As shown in Figure 1, ground floor polyester film low resin mica tape 2 gaps surround on copper strap wire conductor 1, and at this layer, the gap length X1 between two polyester film low resin mica tapes is 0.1mm; Second layer polyester film low resin mica tape 3 gaps surround on ground floor polyester film low resin mica tape 2, at this layer, between the gap between two polyester film low resin mica tapes and the gap of ground floor, evenly stagger, and gap length X2 are 0.2mm; Distance between the gap of the gap of ground floor and the adjacent second layer is 1/3 of mica tape width; The 3rd strata ester film low resin mica tape 4 gaps surround on second layer polyester film low resin mica tape 3, and evenly stagger between the gap of its gap and the second layer, and gap length X3 is 0.3mm; Distance between the gap of the second layer and the adjacent gap of the 3rd layer is 1/3 of mica tape width b; Take this structure, in the time of can avoiding wrapped mica tape, produce gap drift phenomenon and the turn-to-turn insulation short circuit phenomenon of coil after moulding, guarantee the performance of insulation system.
The present embodiment provides a kind of insulation system of 10kV level high-voltage motor, and it comprises turn-to-turn insulation structure, Main Insulation Structure of Electric, anti dizzy structure and protection structure.Wherein the turn-to-turn insulation structure is with embodiment 1, and anti dizzy structure and protection structure are implemented with reference to prior art.Main Insulation Structure of Electric is seven layers of half-stack package, is followed successively by glassine paper reinforcement low resin mica tape layer, polyester film reinforcement low resin mica tape layer, glassine paper reinforcement low resin mica tape layer, polyester film reinforcement low resin mica tape layer, glassine paper reinforcement low resin mica tape layer, polyester film reinforcement low resin mica tape layer, glassine paper reinforcement low resin mica tape layer.The monolateral insulation thickness of Main Insulation Structure of Electric is 1.80～1.88mm.
Comparative Examples 1
This Comparative Examples provides a kind of insulation system of 10kV level high-voltage motor, and it comprises turn-to-turn insulation structure, Main Insulation Structure of Electric, anti dizzy structure and protection structure.Wherein, Main Insulation Structure of Electric, anti dizzy structure and protection structure are with embodiment 2, and the turn-to-turn insulation structure is three layers of flat bag, and the wrapped material of employing is with embodiment 1.
Referring to table 1, wherein 1-3 is the medium loss test result of three coil samples after thermal-electrical aging of making according to the insulation system of embodiment 2; 4-6 is the medium loss test result of three coil samples after thermal-electrical aging of making according to the insulation system of Comparative Examples 1, wherein electric heating ageing testing condition: 120 ℃, and 50HZ, 25KV, 500h.
Table 1 * 10
-2
As can be seen from Table 1: after electricity, thermal ageing test, 4～No. 6 dielectric loss value sharp increase has appearred in sample under 0.8Un, show that electric discharge phenomena have appearred in insulation inside, and 1～No. 3 sample still is in normal condition after electricity, thermal ageing test.
Above-mentioned example only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection range of the present utility model with this.All equivalent transformation or modifications of doing according to the utility model Spirit Essence, within all should being encompassed in protection range of the present utility model.
Claims (10)
1. the turn-to-turn insulation structure of a 10kV level motor, it comprises wire insulation, described wire insulation comprises wrapped multi-layered polyester film low resin mica tape on the copper strap wire conductor, described polyester film low resin mica tape comprises laminated polyester film, mica powder ply of paper, is formed on the adhesive layer between laminated polyester film and mica powder ply of paper
It is characterized in that: described polyester film low resin mica tape also comprises the self-adhesive on the one side that deviates from described adhesive layer that is formed on described polyester film, described polyester film low resin mica tape has three layers, and it is wrapped all to take gap to hold mode, ground floor, the gap length of the second layer and the 3rd layer is made as respectively X1, X2, X3, 0<X1≤0.3mm, 0<X2≤0.3mm, 0<X3≤0.3mm, evenly stagger in the gap of ground floor and the second layer, evenly stagger in the gap of the second layer and the 3rd layer, and the distance between the gap of the gap of ground floor and the adjacent second layer, distance between the gap of the second layer and the adjacent gap of the 3rd layer be described polyester film low resin mica tape width 1/3, the bilateral insulation thickness of described turn-to-turn insulation structure is 0.40 ~ 0.46mm.
2. the turn-to-turn insulation structure of 10kV level motor according to claim 1, it is characterized in that: the thickness of described polyester film low resin mica tape is 0.075 ~ 0.10mm.
3. the turn-to-turn insulation structure of 10kV level motor according to claim 1, it is characterized in that: the curved edge degree of described polyester film low resin mica tape is not more than 0.06mm.
4. according to the turn-to-turn insulation structure of claim 1 or 2 or 3 described 10kV level motors, it is characterized in that: the curved edge degree<X1 of polyester film low resin mica tape≤0.1mm; Curved edge degree<the X2 of polyester film low resin mica tape≤0.2mm; Curved edge degree<the X3 of polyester film low resin mica tape≤0.3mm.
5. the turn-to-turn insulation structure of 10kV level motor according to claim 1, it is characterized in that: described polyester film low resin mica tape is the polyester film low resin mica tape that contains promoter.
6. the turn-to-turn insulation structure of 10kV level motor according to claim 1, it is characterized in that: described adhesive layer consists of epoxies adhesive or modified epoxy class adhesive.
7. the insulation system of a 10kV level motor, it comprises the turn-to-turn insulation structure, Main Insulation Structure of Electric, anti dizzy structure and protection structure, described turn-to-turn insulation structure comprises wire insulation, described wire insulation comprises wrapped multi-layered polyester film low resin mica tape on the copper strap wire conductor, described polyester film low resin mica tape comprises laminated polyester film, the mica powder ply of paper, be formed on the adhesive layer between laminated polyester film and mica powder ply of paper, it is characterized in that: described polyester film low resin mica tape also comprises the self-adhesive on the one side that deviates from described adhesive layer that is formed on described polyester film, described polyester film low resin mica tape has three layers, and it is wrapped all to take gap to hold mode, ground floor, the gap length of the second layer and the 3rd layer is made as respectively X1, X2, X3, 0<X1≤0.3mm, 0<X2≤0.3mm, 0<X3≤0.3mm, evenly stagger in the gap of ground floor and the second layer, evenly stagger in the gap of the second layer and the 3rd layer, and the distance between the gap of the gap of ground floor and the adjacent second layer, distance between the gap of the second layer and the adjacent gap of the 3rd layer be described polyester film low resin mica tape width 1/3, the bilateral insulation thickness of described turn-to-turn insulation structure is 0.40 ~ 0.46mm.
8. the insulation system of 10kV level motor according to claim 7, it is characterized in that: the thickness of described polyester film low resin mica tape is that 0.075 ~ 0.10mm, curved edge degree are not more than 0.06mm.
9. the insulation system of 10kV level motor according to claim 7, it is characterized in that: described adhesive layer consists of epoxies adhesive or modified epoxy class adhesive.
10. the insulation system of 10kV level motor according to claim 7, it is characterized in that: described Main Insulation Structure of Electric comprises the first polyester film reinforcement low resin mica tape layer, the first glass cloth reinforcement low resin mica tape layer, the second polyester film reinforcement low resin mica tape layer and the second glass cloth reinforcement low resin mica tape layer be wound in successively on solenoid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013202989349U CN203312948U (en) | 2013-05-29 | 2013-05-29 | 10-kilovolt motor insulation system and interturn insulation structure thereof |
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| CN2013202989349U CN203312948U (en) | 2013-05-29 | 2013-05-29 | 10-kilovolt motor insulation system and interturn insulation structure thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832746A (en) * | 2018-09-05 | 2018-11-16 | 中国长江动力集团有限公司 | Turn-to-turn insulation single-turn circular coil and rotor windings |
-
2013
- 2013-05-29 CN CN2013202989349U patent/CN203312948U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832746A (en) * | 2018-09-05 | 2018-11-16 | 中国长江动力集团有限公司 | Turn-to-turn insulation single-turn circular coil and rotor windings |
| CN108832746B (en) * | 2018-09-05 | 2024-01-26 | 中国长江动力集团有限公司 | Inter-turn insulating single-turn coil and rotor winding |
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