CN105226863A - A kind of city rail vehicle linear electric motor primary coil high heat conductive insulating structure - Google Patents
A kind of city rail vehicle linear electric motor primary coil high heat conductive insulating structure Download PDFInfo
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- CN105226863A CN105226863A CN201510765969.2A CN201510765969A CN105226863A CN 105226863 A CN105226863 A CN 105226863A CN 201510765969 A CN201510765969 A CN 201510765969A CN 105226863 A CN105226863 A CN 105226863A
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Abstract
The invention discloses a kind of city rail vehicle linear electric motor primary coil high heat conductive insulating structure, comprise insulation system groove, magnetic slot-seal, high thermal trough insulation, high heat conductive insulating filler strip, glass band is washed in high heat conduction, high heat conduction polyimide film, high heat conduction mica tape and electromagnetic wire, substantially do not losing on the basis of insulation property and mechanical performance, the design of high heat conductive insulating structure takes into full account the conductive coefficient improving each part, the temperature rise of effective reduction linear electric motors, electrical insulation properties and mechanical performance and Good Heat-resistance, with epoxy anhydride, organosilicon, the impregnating varnish of the systems such as polyester-imide has favorable compatibility, be applicable to the linear electric motors insulation system of VPI technique.And through the conductive coefficient of rational Combination Design fundamentally lifting motor insulation system, reach requirement and the trend of following design of electrical motor.
Description
Technical field
The present invention relates to machine field, refer to a kind of city rail vehicle linear electric motor primary coil high heat conductive insulating structure especially.
Background technology
City rail vehicle linear electric motors installation dimension is subject to strict restriction, and claimed structure is compact, power is large, volume is little, lightweight, and linear electric motors due to current density large, so caloric value is very large, the most high energy in local reaches 140 DEG C even higher.And be mainly made up of the not high high-molecular organic material (being generally adhesive) of some conductive coefficients and inorganic material (being generally mica paper and glass fabric etc.) as the insulating material of linear electric motors key, the conductive coefficient of the insulation system of general composition is at 0.20 ~ 0.25W/mK, heat can be stoped to disperse to unshakable in one's determination and coolant in the process that linear electric motors run, cause electric machine temperature rise higher, and higher working temperature can will certainly cause insulating material ageing failure, reduce electrical property and mechanical property, and then affect useful life.Therefore, the fundamentally conductive coefficient of lifting motor insulation system, does not destroy the mechanical performance of motor insulation structure simultaneously, becomes a great problem hindering design of electrical motor development.
Summary of the invention
In view of this, while the object of the invention is to propose a kind of mechanical performance not destroying motor insulation structure, the electric motor primary coil insulation structure of the conductive coefficient of lifting motor insulation system.
Based on above-mentioned purpose a kind of city rail vehicle linear electric motor primary coil high heat conductive insulating structure provided by the invention, it is characterized in that comprising insulation system groove, magnetic slot-seal, the first insulating barrier, the second insulating barrier, insulation filler strip and core; Described core is clipped between described insulation filler strip, and successively by the second insulating barrier and the first insulating barrier coated, first insulating barrier is fitted in inside described insulation system groove, the notch of described insulation system groove is closed by described magnetic slot-seal, described first insulating barrier is high heat conduction notch insulating barrier, and described second insulating barrier is high thermal trough insulating barrier.
Further, described magnetic slot-seal is made after filling the adhesive hot pressing of filler by the coating of fiber cloth surface.It is wherein the micron-sized AlN powder of 60 ~ 70% reproducibility iron powders and 10% containing quality, adhesive is epoxy novolac, and the fiber cloth as supporting material is any one of electrician's alkali-free glass cloth, polyester fiber cloth, silicon nitride fiber cloth, boron nitride fiber cloth, silicon carbide fibre cloth, polyamide fibre, polyvinyl chloride fibre or acrylic fibers.
Further, described high heat conduction notch insulation, contain by middle one deck the aramid fiber paper high heat conduction polyimide film and two sides thereof containing high heat filling to be bonded, wherein high heat filling selects nano aluminium oxide or nano aluminum nitride or both mixtures and micrometer alumina or boron nitride fusion to form, and in filler component, the gross mass of nanoscale and common micro-scaled filler is 50% ~ 60% of aramid paper quality.
Further, described high thermal trough insulation is made up of the aramid fiber paper containing high heat filling.
Further, described insulation filler strip is the strip material be made up through hot-pressing processing of the aramid fiber containing high heat filling.
Further, described core ecto-entad comprises the 3rd insulating barrier, the 4th insulating barrier, pentasyllabic quatrain edge layer, the 6th insulating barrier and electromagnetic wire successively.Described 3rd insulating barrier is that glass band is washed in high heat conduction; Described 4th insulating barrier is high heat conduction polyimide film; Described pentasyllabic quatrain edge layer is high heat conduction mica tape; Described 6th insulating barrier is high heat conduction polyimide film.
Further, it is mixed by polyster fibre and glass fibre to knit that glass band is washed in described high heat conduction, and its surface coating adhesive containing high heat filling is made.Wherein high heat filling to be particle diameter the be aluminium oxide of 5 ~ 30 μm or boron nitride or both mixtures, adhesive is the polyurethane of modification.
Further, described 4th insulating barrier and described 6th insulating barrier are the high heat conduction polyimide film containing high heat filling, and high heat filling is the aluminium oxide of 5 ~ 10 μm or boron nitride or aluminium nitride powder or the aluminium oxide of both 5 ~ 10 μm, mixtures or boron nitride or aluminium nitride powder or arbitrarily both mixture arbitrarily.
Further, described high heat conduction mica tape is by high heat conduction polyimide film 1, form containing the adhesive 2 of high heat filling, mica paper 3.Wherein high heat filling is the aluminium oxide of 5 ~ 10 μm or boron nitride or aluminium nitride powder or both mixture arbitrarily, and adhesive is resistant to elevated temperatures epoxy novolac or polyester-imide or BT resin or both or both above mixing arbitrarily.Mica paper is non-calcinated mica paper or mixed copies mica paper.
Further, the number of described electromagnetic wire is at least two, and described electromagnetic wire is coated with turn-to-turn insulation layer, and described turn-to-turn insulation layer forms by high heat conduction is polyimide film sintered.
As can be seen from above, a kind of city rail vehicle linear electric motor primary coil high heat conductive insulating structure provided by the invention, various insulating material is on the basis ensureing insulation property and mechanical performance, the be significantly improved conductive coefficient of coil straight line portion of conductive coefficient reaches 0.46W/mK (common insulation system conductive coefficient is 0.20 ~ 0.25W/mK), the temperature rise of 8-10K can be reduced compared with common insulation system, improve motor radiating efficiency, increase the useful life of motor, improve design of electrical motor power; Monolateral insulation thickness is little; Insulation system has excellent electric insulation property and mechanical performance and heat resistance; There is good compatibility, can be suitable for the impregnating varnish of the system such as epoxy anhydride, organosilicon, polyester-imide is supporting; Be applicable to VPI technique.
Accompanying drawing explanation
Fig. 1 is linear electric motor primary coil high heat conductive insulating structural section schematic diagram;
Fig. 2 is high heat conduction mica tape cross section structure schematic diagram.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
As shown in Figure 1, for linear electric motor primary coil high heat conductive insulating structural section schematic diagram, described insulation system groove 9 cross section is U-shaped, and the notch of insulation system groove 9 is closed by described magnetic slot-seal 1, and described insulation system groove 9 and described magnetic slot-seal 1 form the tubular structure of hollow.Be the first insulating barrier 2 inside tube chamber, described first insulating barrier 2 is the insulation of high heat conduction notch.Be the second insulating barrier 3 in described first insulating barrier, described second insulating barrier 3 is the insulation of high thermal trough.Two cores be clipped between insulation filler strip are had in described second insulating barrier 3.Every article core ecto-entad comprises the 3rd insulating barrier 5, the 4th insulating barrier 6, pentasyllabic quatrain edge layer 7, the 6th insulating barrier 10 and electromagnetic wire 8 successively.
Described magnetic slot-seal 1 makes after filling the adhesive hot pressing of filler by the coating of fiber cloth surface, it is wherein the micron-sized AlN powder of 60 ~ 70% reproducibility iron powders and 10% containing quality, adhesive is epoxy novolac, fiber cloth as supporting material can be electrician with any one of alkali-free glass cloth, polyester fiber cloth, silicon nitride fiber cloth, boron nitride fiber cloth, silicon carbide fibre cloth, polyamide fibre, polyvinyl chloride fibre or acrylic fibers, preferred electrician alkali-free glass cloth, itself can reduce the loss of electric machine and can improve radiating efficiency again.
Described high heat conduction notch insulation contains by middle one deck the aramid fiber paper high heat conduction polyimide film and two sides thereof containing high heat filling to be bonded, wherein high heat filling selects nano aluminium oxide or nano aluminum nitride or both mixtures and micrometer alumina or boron nitride fusion to form, and in filler component, the gross mass of nanoscale and common micro-scaled filler is 50% ~ 60% of aramid paper quality.
In another embodiment of the present invention, described high thermal trough insulation is made up of the aramid fiber paper containing high heat filling, wherein high heat filling selects nano aluminium oxide or nano aluminum nitride or both mixtures and micrometer alumina or boron nitride fusion to form, and in filler component, the gross mass of nanoscale and common micro-scaled filler is 50% ~ 60% of aramid paper quality.
Described insulation filler strip 4 is high heat conductive insulating filler strip, and described high heat conductive insulating filler strip is the strip material be made up through hot-pressing processing of the aramid fiber containing high heat filling.Wherein high heat filling selects nano aluminium oxide or nano aluminum nitride or both mixtures and micrometer alumina or boron nitride fusion to form, and in filler component, the gross mass of nanoscale and common micro-scaled filler is 55% ~ 65% of aramid fiber quality.The immobilization material of described high heat conductive insulating filler strip as coil between radial and coil, can effective fixed coil, plays heat conduction, insulation, shockproof effect.
Described 3rd insulating barrier 5 washs glass band for high heat conduction, is to be mixed by polyster fibre and glass fibre to knit, and its surface coating adhesive containing high heat filling is made.Wherein high heat filling to be particle diameter the be aluminium oxide of 5 ~ 30 μm or boron nitride or both mixtures, adhesive is the polyurethane of modification.Described high heat conduction is washed glass band and can effectively be prevented electromagnetic wire from causing damage in insulation and short circuit because of production and assembly.
Described 4th insulating barrier 6 and the 6th insulating barrier 10 are high heat conduction polyimide film.Described pentasyllabic quatrain edge layer 7 is high heat conduction mica tape, and described 4th insulating barrier 6, pentasyllabic quatrain edge layer 7 and the 6th insulating barrier 10 form insulation against ground material jointly.
As shown in Figure 2, be high heat conduction mica tape cross section structure schematic diagram.Described high heat conduction mica tape is by high heat conduction polyimide film 701, form containing the adhesive 702 of high heat filling, mica paper 703.Wherein high heat filling is the aluminium oxide of 5 ~ 10 μm or boron nitride or aluminium nitride powder or both mixture arbitrarily, and adhesive is resistant to elevated temperatures epoxy novolac or polyester-imide or BT resin or both or both above mixing arbitrarily.Mica paper 703 is for non-calcinated mica paper or mixedly copy mica paper.
In order to further reinforced insulation effect, described electromagnetic wire 8 is coated with turn-to-turn insulation layer, and described turn-to-turn insulation layer forms by high heat conduction is polyimide film sintered.
As a preferred embodiment of the present invention, the gauge of magnetic slot-seal 1 is 2.5mm, and high heat conduction notch insulation 2 contains by middle one deck the aramid fiber paper polyimide film of high heat filling and two sides thereof containing nano aluminium oxide and micrometer alumina mixed fillers to be bonded; High thermal trough insulation 3 is made up of the aramid fiber paper containing nano aluminium oxide and micrometer alumina mixed fillers.High heat conduction notch insulation 2 and high thermal trough 3 gauges that insulate are respectively 0.5mm and 0.15mm.High heat conductive insulating filler strip 4 is made up through hot-pressing processing of the aramid fiber containing nano aluminium oxide and micrometer alumina mixed fillers.Under slot wedge, the gauge of the high heat conductive insulating filler strip 4 of interlayer, bottom is respectively 0.3mm, 0.5mm, 0.3mm.It is mixed by polyster fibre and glass fibre to knit that glass band 5 is washed in high heat conduction, its surface coating polyurethane adhesive containing the boron nitride filler of 5 ~ 30 μm is made, be of a size of 0.1 × 15mm, wrapped mode is half-stack package one deck, high heat conduction mica tape is by high heat conduction polyimide film 701, forms containing the epoxy novolac of the boron nitride filler of 5 ~ 30 μm and polyester-imide mixed glue 702, non-calcinated muscovite paper 703.High heat conduction polyimide film 6, high heat conduction polyimide film 10 and high heat conduction mica tape 7 size are respectively 0.025 × 15mm, 0.1 × 15mm, and wrapped mode is half-stack package one deck.Electromagnetic wire 8 is made up of 6 row's anaerobic red copper wires, and turn-to-turn insulation forms by high heat conduction is polyimide film sintered, and the monolateral insulation thickness of single anaerobic red copper wire is 0.125mm.
Adopt this insulation system to compare common insulation system conductive coefficient to be significantly improved, wherein magnetic slot-seal 1 >=2W/mK, high thermal trough insulation 3 are 0.46W/mK, high heat conductive insulating filler strip 4 is 0.46W/mK, high heat conduction washs that glass band 5 is 0.69W/mK, high heat conduction polyimide film is 0.46W/mK, high heat conduction mica tape is 0.46W/mK, support the use with 200 grades of epoxy anhydride solvent-free immersion paint systems, after VPI PROCESS FOR TREATMENT, the conductive coefficient of whole insulation system can reach 0.46W/mK.The temperature rise of 8-10K can be reduced compared with common insulation system, effectively can improve iron core and coil radiating efficiency, thinning coil insulation structural thickness, improve capacity motor.All technical of the present invention reaches advanced international level, makes the design and devdlop of city rail vehicle linear electric motors insulation system improve a new height.
Those of ordinary skill in the field are to be understood that: the discussion of above any embodiment is only exemplary, and not intended to be implies that the scope of the present disclosure (comprising claim) is limited to these examples; Under thinking of the present invention, can combine between the technical characteristic in above embodiment or different embodiment yet, and there are other changes many of different aspect of the present invention as above, they do not provide in details for the sake of simplicity.Therefore, within the spirit and principles in the present invention all, any omission made, amendment, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a city rail vehicle linear electric motor primary coil high heat conductive insulating structure, is characterized in that comprising insulation system groove, magnetic slot-seal, the first insulating barrier, the second insulating barrier, insulation filler strip and core; Described core is clipped between described insulation filler strip, and successively by the second insulating barrier and the first insulating barrier coated, the first insulating barrier is fitted in inside described insulation system groove, and the notch of described insulation system groove is closed by described magnetic slot-seal;
Described first insulating barrier is high heat conduction notch insulating barrier;
Described second insulating barrier is high thermal trough insulating barrier.
2. city rail vehicle linear electric motor primary coil high heat conductive insulating structure according to claim 1, it is characterized in that, described magnetic slot-seal is made after filling the adhesive hot pressing of filler by the coating of fiber cloth surface, it is wherein the micron-sized AlN powder of 60 ~ 70% reproducibility iron powders and 10% containing quality, adhesive is epoxy novolac, and the fiber cloth as supporting material is any one of electrician's alkali-free glass cloth, polyester fiber cloth, silicon nitride fiber cloth, boron nitride fiber cloth, silicon carbide fibre cloth, polyamide fibre, polyvinyl chloride fibre or acrylic fibers.
3. city rail vehicle linear electric motor primary coil high heat conductive insulating structure according to claim 1, it is characterized in that, described high heat conduction notch insulation contains by middle one deck the aramid fiber paper high heat conduction polyimide film and two sides thereof containing high heat filling to be bonded, wherein high heat filling selects nano aluminium oxide or nano aluminum nitride or both mixtures and micrometer alumina or boron nitride fusion to form, and in filler component, the gross mass of nanoscale and common micro-scaled filler is 50% ~ 60% of aramid paper quality.
4. city rail vehicle linear electric motor primary coil high heat conductive insulating structure according to claim 1, is characterized in that, described high thermal trough insulation is made up of the aramid fiber paper containing high heat filling.
5. city rail vehicle linear electric motor primary coil high heat conductive insulating structure according to claim 1, is characterized in that, described insulation filler strip is the strip material be made up through hot-pressing processing of the aramid fiber containing high heat filling.
6. city rail vehicle linear electric motor primary coil high heat conductive insulating structure according to claim 1, it is characterized in that, described core ecto-entad comprises the 3rd insulating barrier, the 4th insulating barrier, pentasyllabic quatrain edge layer, the 6th insulating barrier and electromagnetic wire successively;
Described 3rd insulating barrier is that glass band is washed in high heat conduction;
Described 4th insulating barrier is high heat conduction polyimide film;
Described pentasyllabic quatrain edge layer is high heat conduction mica tape;
Described 6th insulating barrier is high heat conduction polyimide film.
7. city rail vehicle linear electric motor primary coil high heat conductive insulating structure according to claim 6, it is characterized in that, it is mixed by polyster fibre and glass fibre to knit that glass band is washed in described high heat conduction, its surface coating adhesive containing high heat filling is made, wherein high heat filling to be particle diameter the be aluminium oxide of 5 ~ 30 μm or boron nitride or both mixtures, adhesive is the polyurethane of modification.
8. city rail vehicle linear electric motor primary coil high heat conductive insulating structure according to claim 6, it is characterized in that, described 4th insulating barrier and described 6th insulating barrier are the high heat conduction polyimide film containing high heat filling, and high heat filling is the aluminium oxide of 5 ~ 10 μm or boron nitride or aluminium nitride powder or the aluminium oxide of both 5 ~ 10 μm, mixtures or boron nitride or aluminium nitride powder or arbitrarily both mixture arbitrarily.
9. city rail vehicle linear electric motor primary coil high heat conductive insulating structure according to claim 6, is characterized in that, described high heat conduction mica tape is by high heat conduction polyimide film 1, form containing the adhesive 2 of high heat filling, mica paper 3; Wherein high heat filling is the aluminium oxide of 5 ~ 10 μm or boron nitride or aluminium nitride powder or both mixture arbitrarily, and adhesive is resistant to elevated temperatures epoxy novolac or polyester-imide or BT resin or both or both above mixing arbitrarily; Mica paper is non-calcinated mica paper or mixed copies mica paper.
10. city rail vehicle linear electric motor primary coil high heat conductive insulating structure according to claim 6, it is characterized in that, the number of described electromagnetic wire is at least two, and described electromagnetic wire is coated with turn-to-turn insulation layer, and described turn-to-turn insulation layer forms by high heat conduction is polyimide film sintered.
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Cited By (3)
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| CN110994850A (en) * | 2019-12-24 | 2020-04-10 | 湘潭电机股份有限公司 | High-heat-conductivity motor winding and curing process thereof |
| CN112659695A (en) * | 2020-12-21 | 2021-04-16 | 四川东材科技集团股份有限公司 | High-thermal-conductivity polyaramide fiber paper polyimide film soft composite material and preparation method and application thereof |
| CN114257012A (en) * | 2020-09-23 | 2022-03-29 | 中车株洲电力机车研究所有限公司 | Insulation structure of linear motor and manufacturing method thereof |
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| CN110994850A (en) * | 2019-12-24 | 2020-04-10 | 湘潭电机股份有限公司 | High-heat-conductivity motor winding and curing process thereof |
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