CN104917321A - 10KV high-voltage motor shaped coil and processing method thereof - Google Patents
10KV high-voltage motor shaped coil and processing method thereof Download PDFInfo
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- CN104917321A CN104917321A CN201510299263.1A CN201510299263A CN104917321A CN 104917321 A CN104917321 A CN 104917321A CN 201510299263 A CN201510299263 A CN 201510299263A CN 104917321 A CN104917321 A CN 104917321A
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Abstract
The invention relates to a high-voltage motor shaped coil and a processing method thereof, in particular, a 10KV high-voltage motor shaped coil and a processing method thereof. The single-side insulation thickness of a domestic mature and reliable 10KV (F-grade) high-voltage motor shaped coil is 2.52mm. The coil of the invention is fusiform and includes two end portions and a straight portion; the coil is composed of a plurality of flat copper wires wrapped by an insulating material, a mica insulating layer wrapping the plurality of flat copper wires, and a semiconductor dielectric layer wrapping the mica insulating layer. The 10KV high-voltage motor shaped coil is characterized in that three to seven layers of glue-insufficient mica insulating belts are wound in a half-lapped tapping manner so as to from the mica insulating layer; the thickness of the mica insulating layer is smaller than or equal to 2.4 mm; the mica insulating layer and the semiconductor dielectric layer form a coil main insulating layer; semiconductor dielectric belts wrap the mica insulating layer in a half-lapped tapping manner so as to form the semiconductor layer; the thickness of the coil main insulating layer is smaller than or equal to 2.5 mm; and the straight portion of the coil is immersed in resin. With the 10KV high-voltage motor shaped coil and the processing method thereof provided by the technical schemes of the invention adopted, the size and the manufacturing cost of a motor can be deceased.
Description
Technical field
The present invention relates to a kind of formed coil and adding method thereof of high-voltage motor, particularly relate to a kind of 10KV high-voltage motor formed coil and processing method thereof.
Background technology
The monolateral insulation thickness 2.52mm of 10KV (F level) high-voltage motor formed coil of domestic mature and reliable, some motor producers may reach about 2.8mm by the monolateral insulation thickness of limiting coil of insulating structure design.The developing direction in well-known motor future is that volume is little, power is large, efficiency is high.And the power of motor increases along with the raising of groove utilance; The volume of motor reduces along with the raising of groove utilance; The efficiency of motor improves along with the raising of groove utilance.So how to improve the emphasis that motor slot utilance becomes the research of motor producer of various countries.Again because motor slot utilance is by the restriction of insulating material ratio, the thinning insulation thickness of whose energy, who just occupies the commanding elevation of motor manufacturing.
Summary of the invention
The technical assignment of the technical problem to be solved in the present invention and proposition carries out improving to prior art and improves, and provides a kind of 10KV high-voltage motor formed coil and processing method thereof, for the purpose of the thickness reducing insulating barrier under the prerequisite ensureing insulating capacity.For this reason, the present invention takes following technical scheme.
A kind of 10KV high-voltage motor formed coil, coil is fusiformis, comprise both ends and straight portion, it comprises the many semiconductor medium layers by the wrapped copper strap wire of insulating material, the mica insulation layer being wrapped in many copper strap wires outward, outsourcing mica insulation layer, it is characterized in that: described mica insulation layer is entwined in the mode of half-stack package by the mica insulation band of few glue composition of 3 to 7 layers, mica insulation layer thickness≤2.4mm; Described mica insulation layer, semiconductor medium layer form slot armer layer, and semiconductor medium band forms semiconductor layer with the mode outsourcing of half-stack package on outsourcing mica insulation layer, slot armer layer thickness≤2.5mm; Resin is immersed in the straight portion of coil.Semiconductor medium layer can be made up of other semiconductor tape or semiconductor varnish.
As improving further and supplementing technique scheme, the present invention also comprises following additional technical feature.
Described copper flat wire wrapped is by the fillet copper strap wire of wrapped with insulation.
The mica insulation layer of coil by add low, in or the dry mica paper tape of high dielectric insulation additive wrap up and formed.
Semiconductor medium layer is made up of semiconductor tape or semiconductor varnish.
A kind of processing method of 10KV high-voltage motor formed coil comprises the following steps
1) Mica tape copper strap wire coiling is selected;
2) outside coil, the half-stack package≤6 layer mica insulation layer as coil is mixed with expoxy glass dry mica paper tape and epoxy polyester film dry mica-paper tapes;
3) outside coil mica insulation layer the whole leaching low-resistance corona-prevention belt of half-stack package one deck as semiconductor medium layer;
4) after single coil wrapping slot armer, end winding is first used the flat bag one deck of polytetrafluoroethylene demoulding band, reusable heat shrinkable film interwoven fabric insulating protection belt (6) half-stack package one deck, wrapping scope for extend to end, coil straight portion by end winding, coil straight portion end adhesive tape edge sealing;
5) by wrapping tight previous level be placed on special varnished tool, dipping lacquer fluid level higher than the straight portion of coil lower than end winding highest point;
6) coil is through vacuum pressure impregnation and after baked and cured, and the polytetrafluoroethylene demoulding band extend end winding and heat shrinkage film interwoven fabric insulating protection belt are removed.
In step 5), dipping lacquer process comprises
A) coil preheating 100 ± 5 DEG C, insulation 3 hours after temperature;
B) coil tinning, temperature 50-60 DEG C, previous level is placed on special varnished tool, and coil only puts one deck;
C) vacuumize, vacuum degree is less than 100pa;
D) fidelity is empty, and vacuum degree is less than 100pa, 5 hours time;
E) defeated impregnating varnish, resin temperature 30-40 DEG C, resin viscosity is less than 45 centipoises, lacquer painting liquid level line higher than coil straight line portion height 10-40mm, as shown in Figure 3;
F) be pressurized to 0.5MPa, the time is 0.5-1 hour;
G) pressurize is at 0.5 MPa, and the time is 5 hours;
H) row pressure, the time is 0.5-1 hour;
I) back paint, pressure 0.2-0.25 MPa, time 0.5-1 hour;
J) drip paint, pressure relief, the time is 0.5 hour.
The insulating wrapping number of plies reduced, straight line portion resin pickup improves the process of dielectric strength, and final insulation thickness reduces but the low-intensity that insulate can also reach requirement.
In step 6), during oven dry, by coil vertical hanging in oven dry frock, upward, 130 ± 5 DEG C are incubated 4 hours to the lead end of coil, and 155 ± 5 DEG C are incubated 10 hours.
In step 6), after removing polytetrafluoroethylene demoulding band and heat shrinkage film interwoven fabric insulating protection belt, carry out that wound stator is embedding, winding displacement operation, after operation completes, will have winding stator core to carry out a vacuum pressure VPI dipping baked and cured again.
In step 2) in, outside copper strap wire, mix half-stack package four layers as mica insulation layer with few expoxy glass dry mica paper tape that glue composition 0.13mm is thick, 25mm is wide and epoxy polyester film dry mica-paper tapes.
The whole leaching low-resistance corona-prevention belt that the thick 25mm of half-stack package one deck 0.08mm is wide outside coil mica insulation layer is as semiconductor medium layer.
The thickness of slot armer layer is 1.88mm-2.08mm.
Beneficial effect: main insulation one side thickness is thinned to 1.98mm by original 2.52mm, thinning insulation 0.54mm, insulate thinning 21% compared with traditional structure.Thinning main insulation just can improve groove utilance, and groove utilance improves can reach reduction motor weight--to-power ratio on the one hand, reduces the object of motor volume and manufacturing cost; The thinning thermal conductivity that insulate on the other hand increases, copper factor improves, and the power grade of motor can improve 3-4 gear, substantially close to SIMENS, ABB level on the basis of original grooved; On the one hand the raising of groove utilance can allow motor efficiency on original architecture basics bring up to efficient efficiency by common efficiency again, indirect saving social cost.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the C-C sectional structure schematic diagram of Fig. 1.
Fig. 3 is that the D of Fig. 1 is to structural representation.
In figure: 1-copper flat wire wrapped; 2-mica insulation layer; 3-semiconductor medium layer; 4-impregnating resin; 5-demoulding band; 6-heat shrinkage film interwoven fabric insulating protection belt; 7-adhesive tape; 8-frock.
Embodiment
Below in conjunction with Figure of description, technical scheme of the present invention is described in further detail.
As shown in Figure 1, 2, 3,
The technical program selects Mica tape copper strap wire 1 coiling, the expoxy glass dry mica paper tape (5442-1) wide with the thick 25mm of few glue composition 0.13mm and epoxy polyester film dry mica-paper tapes (5442-1D) mix the mica insulation 2 of half-stack package 7 layers as coil outside coil, mica insulation one side thickness 1.82mm, the whole leaching low-resistance corona-prevention belt that the thick 25mm of half-stack package one deck 0.08mm is wide outside coil mica insulation 2 is as semiconductor medium band 3, slot armer is made up of coil mica insulation 2 and semiconductor medium band 3, main insulation one side thickness reaches 1.98mm.After single coil wrapping slot armer; end winding is first used the flat bag one deck of polytetrafluoroethylene demoulding band 5; use J611-1 heat shrinkage film interwoven fabric insulating protection belt 6 half-stack package one deck again; wrapping scope is that whole end winding and end winding extend to straight line portion distance L1 place, at L1 place with adhesive tape 7 edge sealing.The tight previous level of wrapping is placed on special varnished tool, using VPI epoxy anhydride solventless impregnating (ET884-1) resin as impregnating resin (4).Coil floods after baked and cured through vacuum pressure VPI, the insulation property of coil reach " the large-scale AC asynchronous motor product quality of CEEIA155-2003 is graded " standard Appendix B " large ac machines mass-impregnation stator coil type coil end product quality grades " 10KV coil high-class product standard, coil single-sided insulation thickness is thinned to 1.98mm by existing 2.52mm, thinning 0.54mm.Insulate thinning about 35%.Thinning main insulation just can improve groove utilance, and groove utilance improves can reach reduction motor weight--to-power ratio on the one hand, reduces the object of motor volume and manufacturing cost; The thinning thermal conductivity that insulate on the other hand increases, copper factor improves, and the power grade of motor can improve 2-3 gear, substantially close to SIMENS, ABB level on the basis of original grooved; On the one hand the raising of groove utilance can allow motor efficiency on original architecture basics bring up to efficient efficiency by common efficiency again, indirect saving cost.
10KV high-voltage motor formed coil process steps:
1, Mica tape copper strap wire 1 coiling is selected;
2, outside coil, the mica insulation layer 2 of half-stack package 7 layers as coil is mixed with expoxy glass dry mica paper tape and epoxy polyester film dry mica-paper tapes;
3, outside coil mica insulation layer 2 the whole leaching low-resistance corona-prevention belt of half-stack package one deck as semiconductor medium layer 3;
4, after single coil wrapping slot armer, end winding is first used the flat bag one deck of polytetrafluoroethylene demoulding band 5, reusable heat shrinkable film interwoven fabric insulating protection belt 6 half-stack package one deck, wrapping scope for extend to end, coil straight portion by end winding, coil straight portion end adhesive tape 7 edge sealing;
5, by wrapping tight previous level be placed on special varnished tool, dipping lacquer fluid level higher than the straight portion of coil lower than end winding highest point;
During dipping lacquer, step is:
A) coil preheating 100 ± 5 DEG C, insulation 3 hours after temperature;
B) coil tinning, temperature 50-60 DEG C, previous level is placed on special varnished tool, and coil only puts one deck;
C) vacuumize, vacuum degree is less than 100pa;
D) fidelity is empty, and vacuum degree is less than 100pa, 5 hours time;
E) defeated impregnating varnish, resin 4 temperature 30-40 DEG C, resin 4 viscosity is less than 45 centipoises, lacquer painting liquid level line higher than coil straight line portion height 10-40mm, as shown in Figure 3;
F) be pressurized to 0.5MPa, the time is 0.5-1 hour;
G) pressurize is at 0.5 MPa, and the time is 5 hours;
H) row pressure, the time is 0.5-1 hour;
I) back paint, pressure 0.2-0.25 MPa, time 0.5-1 hour;
J) drip paint, pressure relief, the time is 0.5 hour.
6, coil is through vacuum pressure impregnation and after baked and cured, and the polytetrafluoroethylene demoulding band 5 extend end winding and heat shrinkage film interwoven fabric insulating protection belt 6 are removed; When wherein drying, by coil vertical hanging in oven dry frock, upward, 130 ± 5 DEG C are incubated 4 hours to the lead end of coil, and 155 ± 5 DEG C are incubated 10 hours; After removal polytetrafluoroethylene demoulding band 5 and heat shrinkage film interwoven fabric insulating protection belt 6, carry out that wound stator is embedding, winding displacement operation, after operation completes, will have winding stator core to carry out a vacuum pressure VPI dipping baked and cured again.
A kind of 10KV high-voltage motor formed coil shown in above figure and processing method thereof are specific embodiments of the invention; substantive distinguishing features of the present invention and progress are embodied; can according to the use needs of reality; under enlightenment of the present invention; it is carried out to the equivalent modifications of the aspect such as shape, structure, all at the row of the protection range of this programme.
Claims (10)
1. a 10KV high-voltage motor formed coil, coil is fusiformis, comprise both ends and straight portion, it comprise many by the wrapped copper strap wire (1) of insulating material, be wrapped in the mica insulation layer (2) of many copper strap wires, the semiconductor medium layer (3) of outsourcing mica insulation layer (2) outward, it is characterized in that: described mica insulation layer (2) is entwined in the mode of half-stack package by the mica insulation band of few glue composition of 3 to 7 layers, mica insulation layer (2) thickness≤2.4mm; Described mica insulation layer (2), semiconductor medium layer (3) form slot armer layer, and semiconductor medium band above forms semiconductor medium layer (3) with the mode outsourcing of half-stack package at outsourcing mica insulation layer (2), slot armer layer thickness≤2.5mm; Resin (4) is immersed in the straight portion of coil.
2. a kind of 10KV high-voltage motor formed coil according to claim 1, is characterized in that: described copper flat wire wrapped (1) is by the fillet copper strap wire of wrapped with insulation.
3. a kind of 10KV high-voltage motor formed coil according to claim 1, is characterized in that: the mica insulation layer (2) of coil be by add low, in or the dry mica paper tape of high dielectric insulation additive wrap up and formed.
4. a kind of 10KV high-voltage motor formed coil according to claim 1, is characterized in that: semiconductor medium layer (3) is made up of semiconductor tape or semiconductor varnish.
5. a processing method for 10KV high-voltage motor formed coil, is characterized in that comprising the following steps
1) Mica tape copper strap wire (1) coiling is selected;
2) outside coil, the mica insulation layer (2) of half-stack package 3 to 7 layers as coil is mixed with expoxy glass dry mica paper tape and epoxy polyester film dry mica-paper tapes;
3) at coil mica insulation layer (2) outside half-stack package one deck whole leaching low-resistance corona-prevention belt as semiconductor medium layer (3);
4) after single coil wrapping slot armer, end winding is first used the flat bag one deck of polytetrafluoroethylene demoulding band (5), reusable heat shrinkable film interwoven fabric insulating protection belt (6) half-stack package one deck, wrapping scope for extend to end, coil straight portion by end winding, coil straight portion end adhesive tape (7) edge sealing;
5) by wrapping tight previous level be placed on special varnished tool, dipping lacquer fluid level higher than the straight portion of coil lower than end winding highest point;
6) coil is through vacuum pressure impregnation and after baked and cured, the polytetrafluoroethylene demoulding band (5) extend end winding and heat shrinkage film interwoven fabric insulating protection belt (6) removal.
6. a kind of 10KV high-voltage motor formed coil processing method according to claim 5, its spy is: in step 5), and dipping lacquer process comprises
A) coil preheating 100 ± 5 DEG C, insulation 3 hours after temperature;
B) coil tinning, temperature 50-60 DEG C, previous level is placed on special varnished tool, and coil only puts one deck;
C) vacuumize, vacuum degree is less than 100pa;
D) fidelity is empty, and vacuum degree is less than 100pa, 5 hours time;
E) defeated impregnating varnish, resin (4) temperature 30-40 DEG C, resin (4) viscosity is less than 45 centipoises, lacquer painting liquid level line higher than coil straight line portion height 10-40mm, as shown in Figure 3;
F) be pressurized to 0.5MPa, the time is 0.5-1 hour;
G) pressurize is at 0.5 MPa, and the time is 5 hours;
H) row pressure, the time is 0.5-1 hour;
I) back paint, pressure 0.2-0.25 MPa, time 0.5-1 hour;
J) drip paint, pressure relief, the time is 0.5 hour.
7. a kind of 10KV high-voltage motor formed coil processing method according to claim 5, is characterized in that: in step 6), during oven dry, by coil vertical hanging in oven dry frock, upward, 130 ± 5 DEG C are incubated 4 hours to the lead end of coil, and 155 ± 5 DEG C are incubated 10 hours.
8. a kind of 10KV high-voltage motor formed coil processing method according to claim 5; its spy is: in step 6); after removing polytetrafluoroethylene demoulding band (5) and heat shrinkage film interwoven fabric insulating protection belt (6); carry out that wound stator is embedding, winding displacement operation, winding stator core will be had after operation completes to carry out a vacuum pressure VPI again and flood baked and cured.
9. a kind of 10KV high-voltage motor formed coil processing method according to claim 5, it is characterized in that: in step 2) in, outside copper strap wire, mix half-stack package 7 layers as mica insulation layer (2) with few expoxy glass dry mica paper tape that glue composition 0.13mm is thick, 25mm is wide and epoxy polyester film dry mica-paper tapes.
10. a kind of 10KV high-voltage motor formed coil processing method according to claim 9, it is characterized in that: the whole leaching low-resistance corona-prevention belt that the thick 25mm of half-stack package one deck 0.08mm is wide outside coil mica insulation layer (2) is as semiconductor medium layer (3), and the thickness of slot armer layer is 1.88mm-2.08mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108183587A (en) * | 2017-12-13 | 2018-06-19 | 卧龙电气集团股份有限公司 | A kind of manufacturing method of 10kV compact high-voltage motors ultrathin insulating structure |
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