CN201673697U - Variable frequency cable - Google Patents
Variable frequency cable Download PDFInfo
- Publication number
- CN201673697U CN201673697U CN2010201428945U CN201020142894U CN201673697U CN 201673697 U CN201673697 U CN 201673697U CN 2010201428945 U CN2010201428945 U CN 2010201428945U CN 201020142894 U CN201020142894 U CN 201020142894U CN 201673697 U CN201673697 U CN 201673697U
- Authority
- CN
- China
- Prior art keywords
- layer
- main push
- towing rope
- lapping layer
- variable frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a variable frequency cable which comprises three main cable cores. Inner winding claddings are provided outside the three main cable cores. A shielding layer is provided outside the inner winding claddings. A copper wire armoring layer is provided outside the shielding layer. An outer winding cladding is provided outside the copper wire armoring layer. An oversheath is provided outside the outer winding cladding. The variable frequency cable further comprises three grounding wires. Each grounding wire is provided between the outside parts of two adjacent main cable cores. The variable frequency cable can reduce high order harmonic wave in the circuit and reduces the line loss.
Description
Technical field
The utility model relates to a kind of cable, particularly a kind of frequency-changing cable.
Background technology
The electric equipment products of modern industry; great majority all design and adopt the variable-frequency motor control system; realize energy-conservation economize on electricity; but variable-frequency motor and control system; in use through regular meeting's high speed, high frequent frequency conversion; pulse current increases, and can cause wound bad to frequency converter easily, and the life-span of motor and control system also can be affected.So this has good anti-surge and shield effectiveness with regard to the frequency-changing cable that requires to connect the variable-frequency motor control system.The screen of existing frequency-changing cable is mainly with copper wire copper strips combination shielding, copper wire braid shielded, copper strips shielding, the shielding of copper wire braiding copper strips, though adopt the frequency-changing cable of this shielding layer structure that certain anti-surge and shield effectiveness are arranged, but cost is too high, cable itself is too heavy, and the problem that occurs high order harmonic component easily, make the supply voltage distortion, quality of voltage descends, and line loss increases.
Summary of the invention
The purpose of this utility model provides a kind of frequency-changing cable, and frequency-changing cable of the present utility model can reduce the high order harmonic component in the circuit, reduces line loss.
The technical scheme that realizes the utility model purpose is as follows:
Frequency-changing cable, comprise three main push-towing rope cores, be outside equipped with interior lapping layer at three main push-towing rope cores, interior lapping layer is provided with screen outward, screen is provided with the copper wire armour outward, and the copper wire armour is provided with outer lapping layer outward, and outer lapping layer is provided with oversheath outward, also comprise three earth connections, each earth connection is between the outside of adjacent two main push-towing rope cores.
Between interior lapping layer and main push-towing rope core and earth connection, be provided with packed layer.
Described screen is an aluminium foil layer.Adopted such scheme, also comprised three earth connections, each earth connection is between the outside of adjacent two main push-towing rope cores.Because three main push-towing rope cores are with connecting three-phase electricity, main push-towing rope core and earth connection adopt above-mentioned arrangement, it is the corresponding and evenly distribution of main push-towing rope core and earth connection, the high order harmonic component that can the balance triple line produces, reduce high order harmonic component and wire capacitance resonance and produce superpotential possibility, reduced the harm of high order harmonic component, reduced line loss simultaneously dielectric strength.
Between interior lapping layer and main push-towing rope core and earth connection, be provided with packed layer.Increased the compactness of the mutual applying between earth connection and the main push-towing rope core by packed layer, helped reduction high order harmonic component.
Described screen is an aluminium foil layer, adopts aluminium foil layer as screen, not only can strengthen the balance of electric power system, makes cable have stronger anti-surge, but also has strengthened shield effectiveness.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
In the accompanying drawing, 1 is the main push-towing rope core, and 2 is earth connection, and 3 is interior lapping layer, and 4 is packed layer, and 5 is screen, and 6 is the copper wire armour, and 7 is outer lapping layer, and 8 is oversheath.
Embodiment
With reference to Fig. 1, frequency-changing cable of the present utility model comprises three main push-towing rope cores 1 and three earth connections 2, and the main push-towing rope core is made up of electric conductor and insulating barrier, and each earth connection is evenly distributed between the outside of adjacent two main push-towing rope cores.Lapping layer 3 in three main push-towing rope cores are outside equipped with is provided with packed layer 4 between interior lapping layer and main push-towing rope core and earth connection.Interior lapping layer is provided with screen 5 outward, and this screen is an aluminium foil layer.Be provided with copper wire armour 6 outside the screen 5, the copper wire armour is provided with outer lapping layer 7 outward, the outer lapping layer 7 outer oversheaths 8 that are provided with.
Claims (3)
1. frequency-changing cable, comprise three main push-towing rope cores, be outside equipped with interior lapping layer at three main push-towing rope cores, interior lapping layer is provided with screen outward, screen is provided with the copper wire armour outward, and the copper wire armour is provided with outer lapping layer outward, and outer lapping layer is provided with oversheath outward, it is characterized in that: also comprise three earth connections, each earth connection is between the outside of adjacent two main push-towing rope cores.
2. according to the described frequency-changing cable of claim 1, it is characterized in that: between interior lapping layer and main push-towing rope core and earth connection, be provided with packed layer.
3. according to the described frequency-changing cable of claim 1, it is characterized in that: described screen is an aluminium foil layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201428945U CN201673697U (en) | 2010-03-26 | 2010-03-26 | Variable frequency cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201428945U CN201673697U (en) | 2010-03-26 | 2010-03-26 | Variable frequency cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201673697U true CN201673697U (en) | 2010-12-15 |
Family
ID=43331106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201428945U Expired - Fee Related CN201673697U (en) | 2010-03-26 | 2010-03-26 | Variable frequency cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201673697U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708969A (en) * | 2012-06-22 | 2012-10-03 | 南通米兰特电气有限公司 | Uvioresistant flexible connecting cable |
-
2010
- 2010-03-26 CN CN2010201428945U patent/CN201673697U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708969A (en) * | 2012-06-22 | 2012-10-03 | 南通米兰特电气有限公司 | Uvioresistant flexible connecting cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101215 Termination date: 20110326 |