CN204102624U - For voltage source cable in frequency changing driving system - Google Patents
For voltage source cable in frequency changing driving system Download PDFInfo
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- CN204102624U CN204102624U CN201420361395.3U CN201420361395U CN204102624U CN 204102624 U CN204102624 U CN 204102624U CN 201420361395 U CN201420361395 U CN 201420361395U CN 204102624 U CN204102624 U CN 204102624U
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Abstract
For voltage source cable in frequency changing driving system, comprise heterogeneous power transmission core, the power transmission core of each phase comprises conductor, insulating barrier, phase-splitting metal screen layer and phase-splitting electrical isolation layer from inside to outside successively, described phase-splitting metal screen layer by insulating barrier outward dredge around copper wire layer and the wrapped copper strips layer outside described copper wire layer of overlap combine; Be provided with packed layer between heterogeneous power transmission core space and form stranding, be provided with belting layer, the total screen of metal and outer jacket from inside to outside successively outward at described stranding.This cable is low in energy consumption, electrical insulation properties and Electro Magnetic Compatibility good, be applicable to the occasion being applied in high-power frequency conversion drive system and electromagnetism complexity.
Description
Technical field
The utility model relates to a kind of feed cable, particularly a kind of for voltage source cable in frequency changing driving system, is particularly suited for the occasion being applied in high-power frequency conversion drive system and electromagnetism complexity.
Background technology
Along with the development of modern power electronics technology, in recent years, mostly variable-frequency control technique is adopted in industry, improve the operating efficiency of industrial motor system, thus reach the object of effective saves energy, modern converter technique oneself become collection high frequency, high pressure and big current alternating-current electric drive technology, AC Drive and control technology have been one of technology with the fastest developing speed at present, frequency-changing cable must be used connect in conversion process, and this kind of cable is generally used for frequency converter and variable-frequency motor in control cubicle, between variable frequency power supply, generally be laid in industrial and mining enterprises' factory building inner, interference is there is to external world because frequency converter produces harmonic wave, and factory building is inner and stube cable place often has a lot of equipment and precision instrument, the use of frequency converter causes very important pollution to circuit, electric power transfer quality between frequency converter and variable-frequency motor is declined, these environments for use all need the structure of cable to make necessary improvement and adjustment, to adapt to the requirement as the characteristic of power transmission cable or stube cable and the matching used cable of middle pressure transformer in medium-voltage frequency conversion system.
But at present, in frequency conversion system use, the process structure of voltage source cable still generally adopts the three-core structure of copper core conductor, three-layer co-extruded insulation, shielding, oversheath, and greatly, electromagnetic interference is large for the high order harmonic component that cable produces and pulse voltage, the EMC level of system is low, and cable is short for useful life.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the purpose of this utility model is to provide a kind of for voltage source cable in frequency changing driving system, and it possesses the function that excellent Electro Magnetic Compatibility and high-quality are powered.
For achieving the above object, the utility model provides a kind of for voltage source cable in frequency changing driving system, comprise heterogeneous power transmission core, the power transmission core of each phase comprises conductor, insulating barrier, phase-splitting metal screen layer and phase-splitting electrical isolation layer from inside to outside successively, described phase-splitting metal screen layer by insulating barrier outward dredge around copper wire layer and the wrapped copper strips layer outside described copper wire layer of overlap combine; Be provided with packed layer between heterogeneous power transmission core space and form stranding, be provided with belting layer 9, the total screen 11 of metal and outer jacket 12 from inside to outside successively outward at described stranding.
Further, described insulating barrier is by semiconductive internal shield 2, ethylene-propylene-diene monomer insulating barrier 3 and semiconductive outer shielding layer 4 is three-layer co-extruded forms.
Further, described phase-splitting electrical isolation layer is the PE electrical isolation layer 7 extruding polyethylene outside phase-splitting metal screen layer.
Further, the outer wrapped non-hygroscopic nonwoven fabrics twining package tape of described stranding forms belting layer 9
Further, the sheath 10 extruded by PVC plastic is provided with between described belting layer 9 and the total screen 11 of metal.
Further, the total screen of described metal 11 is formed by copper strips is overlapping wrapped.
Further, described outer jacket 12 is the PVC sheath extruded outside the total screen 11 of metal.
Further, described middle voltage source cable comprises the power transmission core of three-phase.
Further, described conductor is the soft copper stranded conductor of the many stranded in the same way formations of soft copper tow, and its conductor structure is between the 2nd kind and the 5th kind of conductor.
Of the present utility modelly can have low transmission impedance, low insulation loss, high resistance electromagnetic disturbance, high electromagnetic coupled balance concurrently for voltage source cable in frequency changing driving system.And the delivery of electrical energy quality of middle voltage source cable of the present utility model is high, especially be useful in the occasion of high-power frequency conversion drive system and electromagnetism complexity, its have soft easily to lay, the life-span is long, the feature of economic environmental protection, effectively can also reduce noise of motor, lifting motor rotating speed, increases lay length.
Accompanying drawing explanation
Fig. 1 overall structure schematic diagram for voltage source cable in frequency changing driving system of the present utility model.
In figure: 1-strands soft copper conductor, 2-semiconductive internal shield, 3-Ethylene Propylene Terpolymer insulating barrier, 4-semiconductive outer shielding layer, 5-copper wire dredge winding layer, 6-copper strips lapping layer, 7-electrical isolation layer, 8-filling, 9-belting layer, 10-sheath, the total screen of 11-, 12-outer jacket.
Embodiment
Be described further embodiment of the present utility model below in conjunction with accompanying drawing, following examples only for clearly the technical solution of the utility model being described, and can not limit protection range of the present utility model with this.
As shown in Figure 1, the utility model provides a kind of for voltage source cable in frequency changing driving system, comprise three-phase power transmission core, each phase power transmission core comprises conductor, insulating barrier, phase-splitting metal screen layer and phase-splitting electrical isolation layer from inside to outside successively, conductor 1 is the soft copper stranded conductor of many soft copper tow layering to stranded formation, and its conductor structure is between the 2nd kind of conductor and the 5th kind of conductor.2nd kind of conductor of the present utility model refers to the 2nd kind of conductor described in GB/T3956-2008 " conductor of cable ", and the 5th kind of conductor of the present utility model refers to the 5th kind of conductor described in GB/T3956-2008 " conductor of cable ".The material extruding the excellent electrical property such as ethylene propylene diene rubber insulation or 10kV level XLPE insulation outside conductor forms insulating barrier, can according to the material of cable laying environment determination insulating barrier, to ensure that cable has excellent electrical insulation properties, there is remarkable ozone-resistant, resistance to weather ageing-resistant performance and outstanding impact elasticity simultaneously.Shielding outside conductor can form semiconductive internal shield and semiconductive outer shielding layer according to conductor structure at insulating barrier inside and outside wrapped one or two-layer semi-conductive cloth tape, forms the power transmission core of insulation.Preferably, insulating barrier is by semiconductive internal shield, ethylene-propylene-diene monomer insulating barrier and semiconductive outer shielding layer is three-layer co-extruded forms.
Described phase-splitting metal screen layer adopt insulating barrier dredge with one heart outward around copper wire layer and the wrapped copper strips layer outside described copper wire layer of overlap combine, insulation the power transmission core benefit that adopts copper wire to dredge around the overlapping lapping structure of+copper strips be outward make phase-splitting metal screen layer and three-phase master core form coaxial configuration, this structure makes cable have better electromagnetic compatibility, can anti-electromagnetic induction, imperfect earth and power line conducted interference, prevent induced electromotive force excessive.That is, this phase-splitting metal screen layer had both played the effect suppressing electromagnetic wave externally to be launched, and can be used as again the passage of short circuit current, also played the effect of neutral core overload protection.Outside phase-splitting metal screen layer, extrude polythene material shield separator as phase-splitting, can, by outer for three-phase master core metal screen layer insulation isolation, make it not interfere with each other.Be provided with packed layer between heterogeneous power transmission core space and form stranding, comprise the belting layer 9 adopting non-hygroscopic strip lap, the sheath 10 extruding PVC material, the total screen 11 of metal and outer jacket 12 outward from inside to outside successively at described stranding.Specifically; inner sheath outside cable core 10 pairs of cable cores play a protective role; inner sheath adopts the total screen 11 of the overlapping wrapped formation metal of copper strips outward; PVC or other material with environmental protection and property is extruded as outer jacket 12, to protect cable core not by external force or mechanical wounding outside the total screen 11 of metal.
By adopt the soft copper conductor between the 2nd kind and the 5th kind of conductor of layering strands be in the same way applied in high-power frequency conversion drive system with on voltage source cable, while meeting cable laying requirement softness, the actual throughflow surface of conductor amasss and obtains suitable lifting, and reduce impedance, reduce the loss power of wire, therefore, the electric pressure of frequency changing driving system cable is increased to 8.7/15kV by the utility model, can meet middle high-pressure Large Copacity frequency conversion system Power supply demand.In addition, the phase-splitting metallic shield mode that concentric conductor is dredged around+copper strips is wrapped makes cable earth wire and main line become coaxial configuration, and three-phase symmetrical, reach homogenizing electric field and each effect balanced mutually, effectively solve the impact of pulse voltage on cable, simultaneously the electrical isolation layer that arranges outward of phase-splitting metal screen layer can effectively isolatedly to come each, makes it not interfere with each other.This cable has lower-wattage loss, lower screen transmission resistance and shielding rejection coefficient, excellent electrical insulation properties and Electro Magnetic Compatibility, be applicable to the occasion being applied in high-power frequency conversion drive system and electromagnetism complexity, be specially adapted to ac rated voltage 8.7/15kV and following, for making Power supply cable or stube cable in FREQUENCY CONTROL transmission or high-power frequency conversion drive system, can be used for the industrial aspect such as oil, metallurgy, generating, railway, mine, papermaking, iron and steel, intermetallic composite coating and food processing, such cable.
The following describes the manufacture process for voltage source cable in frequency changing driving system of the present utility model.
As shown in Figure 1: first the high-quality oxygen-free copper bar wire drawing and annealing of excellent electrical property is made soft copper silk, many soft copper silks make strands soft copper conductor 1 through layering is stranded in the same way, and the structure of strands soft copper conductor 1 is between the 2nd kind described in GB/T3956-2008 " conductor of cable " with between the 5th kind of conductor.Outer three-layer co-extruded as insulating barrier by semiconductive internal shield 2, ethylene-propylene-diene monomer insulating barrier 3 and semiconductive outer shielding layer 4 at strands soft copper conductor 1; Ethylene-propylene-diene monomer insulating barrier 3 can be insulated by ethylene propylene diene rubber or the material of the excellent electrical property such as 10kV level XLPE insulation extrudes and forms, according to cable laying environment determination insulating material, outside conductor, can form semiconductive internal shield 2 and semiconductive outer shielding layer 4 according to the wrapped semi-conductive cloth tape of conductor structure.Then dredge around copper wire outward at insulating barrier, dredge and dredge winding layer 5, copper strips lapping layer 6 as phase-splitting metal screen layer around the outer overlapping wrapped copper strips formation copper wire of copper wire; The phase-splitting metallic shield mode that concentric conductor is dredged around+copper strips is wrapped makes cable earth wire and main line become coaxial configuration, three-phase symmetrical, reaches homogenizing electric field and each effect balanced mutually.Extrude polyethylene formation PE electrical isolation layer 7 afterwards again and form power transmission core.When the power transmission core stranding of three-phase, between the space of power transmission core, fan-shaped foam filled bar is filled the foam filled layer 8 of consolidation formation PP and form stranding; And the outer overlapping wrapped non-hygroscopic nonwoven fabrics twining package tape of stranding tightens formation belting layer 9; Outside belting layer 9, carry out PVC plastic extrude inner sheath formation sheath 10, stranding is played a protective role; In the outer overlapping wrapped copper strips of sheath 10 as the total screen 11 of metal, the total screen of metal 11 makes cable have good electromagnetism interference effect; Finally outside the total screen 11 of metal, extrude PVC as oversheath 12 according to cable laying environment, cable can be made to avoid mechanical damage, and there is flame retardant effect.
It is to be understood that; the above; be only preferred embodiment of the present utility model; not in order to limit the utility model; every according to technical spirit of the present utility model to any trickle amendment made for any of the above embodiments, equivalent replace and improve, within the protection range that all should be included in technical solutions of the utility model.
Claims (9)
1. one kind for voltage source cable in frequency changing driving system, comprise heterogeneous power transmission core, it is characterized in that: the power transmission core of each phase comprises conductor, insulating barrier, phase-splitting metal screen layer and phase-splitting electrical isolation layer from inside to outside successively, described phase-splitting metal screen layer by insulating barrier outward dredge around copper wire layer and the wrapped copper strips layer outside described copper wire layer of overlap combine; Be provided with packed layer between heterogeneous power transmission core space and form stranding, be provided with belting layer (9), the total screen of metal (11) and outer jacket (12) from inside to outside successively outward at described stranding.
2. according to claim 1 for voltage source cable in frequency changing driving system, it is characterized in that: described insulating barrier is by semiconductive internal shield (2), ethylene-propylene-diene monomer insulating barrier (3) and semiconductive outer shielding layer (4) is three-layer co-extruded forms.
3. according to claim 1 for voltage source cable in frequency changing driving system, it is characterized in that: described phase-splitting electrical isolation layer is the PE electrical isolation layer (7) extruding polyethylene outside phase-splitting metal screen layer.
4. according to claim 1 for voltage source cable in frequency changing driving system, it is characterized in that: the outer wrapped non-hygroscopic nonwoven fabrics twining package tape of described stranding forms belting layer (9)
5. according to claim 1 for voltage source cable in frequency changing driving system, it is characterized in that: between described belting layer (9) and the total screen of metal (11), be provided with the sheath (10) extruded by PVC plastic.
6. according to claim 1 for voltage source cable in frequency changing driving system, it is characterized in that: the total screen of described metal (11) is formed by copper strips is overlapping wrapped.
7. according to claim 1 for voltage source cable in frequency changing driving system, it is characterized in that: described outer jacket (12) is the PVC sheath extruded outside the total screen of metal (11).
8. according to claim 1 for voltage source cable in frequency changing driving system, it is characterized in that: the middle voltage source cable of described frequency changing driving system comprises the power transmission core of three-phase.
9. according to claim 1 for voltage source cable in frequency changing driving system, it is characterized in that: described conductor is the soft copper stranded conductor of the many stranded in the same way formations of soft copper tow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420361395.3U CN204102624U (en) | 2014-07-01 | 2014-07-01 | For voltage source cable in frequency changing driving system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420361395.3U CN204102624U (en) | 2014-07-01 | 2014-07-01 | For voltage source cable in frequency changing driving system |
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| CN204102624U true CN204102624U (en) | 2015-01-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938738A (en) * | 2016-05-26 | 2016-09-14 | 合肥中海信息科技有限公司 | Variable frequency cable for silver-copper alloy conductor aerospace |
| CN114156008A (en) * | 2021-12-06 | 2022-03-08 | 无锡市明珠电缆有限公司 | Medium-voltage variable-frequency power cable matched with high-performance high-capacity frequency converter and preparation method thereof |
-
2014
- 2014-07-01 CN CN201420361395.3U patent/CN204102624U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938738A (en) * | 2016-05-26 | 2016-09-14 | 合肥中海信息科技有限公司 | Variable frequency cable for silver-copper alloy conductor aerospace |
| CN105938738B (en) * | 2016-05-26 | 2017-12-26 | 安徽省巢湖海兴电缆集团有限公司 | A kind of yellow gold conductor Aero-Space frequency-changing cable |
| CN114156008A (en) * | 2021-12-06 | 2022-03-08 | 无锡市明珠电缆有限公司 | Medium-voltage variable-frequency power cable matched with high-performance high-capacity frequency converter and preparation method thereof |
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