CN202258450U - Highly shielded frequency conversion cable - Google Patents
Highly shielded frequency conversion cable Download PDFInfo
- Publication number
- CN202258450U CN202258450U CN 201120383508 CN201120383508U CN202258450U CN 202258450 U CN202258450 U CN 202258450U CN 201120383508 CN201120383508 CN 201120383508 CN 201120383508 U CN201120383508 U CN 201120383508U CN 202258450 U CN202258450 U CN 202258450U
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- Prior art keywords
- cable
- copper
- shielding
- composite membrane
- integument
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- 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 relates to a highly shielded frequency conversion cable which is characterized in that a main conductor secondary shielding structure of the cable adopts that the outside of a main insulating layer of each main conductor is lengthwise arranged with a copper secondary shielding drainage wire, and then is wrapped with a copper-plastic composite film secondary shielding wrapping layer; and a cable primary shielding structure adopts that the outside of a conductor wrapping tape of a finished cable is lengthwise provided with a primary shielding drainage wire which is formed by twisting tinned coppers, and then is wrapped with an aluminum-plastic composite film primary shielding wrapping layer, a copper-plastic composite film primary shielding wrapping layer, a copper wire woven primary shielding wrapping layer, and an outer sheath layer in order.
Description
Technical field
The utility model relates to and utilizes a kind of frequency-changing cable, relates to a kind of high shielding frequency-changing cable specifically.
Background technology
Along with people's is with the increase to the demand and the conversion amplitude of frequency high speed development; Cable as being used for connection usefulness between variable frequency power supply and the variable-frequency motor must have stronger proof voltage impact; Pulse voltage in the time of standing at a high speed frequent frequency conversion; Has excellent anti-interference, good Electro Magnetic Compatibility.This frequency-changing cable that just requires to use will have high shield effectiveness.
The screen of traditional frequency-changing cable is generally the shielding of master core, is to be made up of copper wire braiding or the wrapped one deck of copper strips, because the master core insulating barrier is thinner, above that copper wire braiding or copper strips lapped shielding layer are easy to damage insulating barrier, cause cable breakdown.For avoiding this harm, needing increases band or lining, causes the construction of cable to become to heighten and adds cost.Also constituting of total shielding of cable by copper wire braiding or the wrapped one deck of copper strips.The mutual capacitance, the transfer impedance that are exactly frequency-changing cable like this are bigger, and loss increases, and radiativity is stronger.Frequency conversion electrical equipment is produced certain interference.
Summary of the invention
The purpose of the utility model provides a kind of high shielding frequency-changing cable to existing weak point in the above-mentioned prior art just.The cable of the utility model has excellent anti-interference radiation resistance; Good Electro Magnetic Compatibility; And can reasonably offset the humorous strange secondary frequencies in that of high order, the condensance loss of cable reduces, and has reduced the electromagnetic radiation in the whole system; Frequency conversion electrical equipment is played good protection, can prolong its useful life.
The high shielding construction of this cable is: the master core shielding construction of frequency-changing cable is that drainage thread and copper are moulded the wrapped branch shielding construction of composite membrane.Total shielding of frequency-changing cable is that drainage thread and aluminum-plastic composite membrane are wrapped, copper is moulded the wrapped copper wire braiding structure of composite membrane.Adopt the frequency-changing cable of this novel shielding construction, can effectively improve the anti-electromagnetic interference property of cable, make cable have low mutual capacitance through whole construction of cable design, low transfer impedance, low radiance.Can play very good protective action to frequency conversion electrical equipment.
The purpose of the utility model can realize through following concrete technical measures:
The main insulating layer that the master core of the height shielding frequency-changing cable of the utility model divides shielding construction to be employed in master core is vertically put into the wrapped then copper of copper split screen drainage thread outward and is moulded composite membrane branch shielding integument; The total shielding construction employing of cable is outside the band of the cable core of cable stranding, vertically to put into the stranded total screen drainage thread of tin-coated copper, and wrapped successively then aluminum-plastic composite membrane always shields integument, copper is moulded composite membrane and always shielded integument, copper wire braiding total shielding integument and external sheath layer.
Aluminum-plastic composite membrane described in the utility model always shield integument mould towards outside; Said copper is moulded moulding towards interior of composite membrane.
Cable master core core number in the utility model is 3+3, nominal cross mm
2For: 3 * 2.5～70+3 * 0.5～10.Split screen drainage thread nominal cross is not less than 0.5 mm
2Total screen drainage thread is stranded tinned wird, and adopting the tin-coated copper twisted wire is generation chemical reaction when preventing that copper cash from contacting with the aluminium face of aluminum-plastic composite membrane, influences shielding properties.Its tin-coated copper twisted wire drainage thread specification is 7 * 0.3～0.5 mm.Copper is moulded composite membrane, plastic-aluminum combined film thickness is: 0.05 ~ 0.12 mm.The braiding brass wire diameter is: 0.2 mm.The copper wire count is not less than 82%.
Producing effect as follows of the utility model:
The prior art of comparing the utility model has improved the anti-electromagnetic interference property of frequency-changing cable, has solved frequency-changing cable imperfect earth and power line conducted interference situation, also makes inductance be able to reduce simultaneously, can prevent effectively that induced electromotive force is excessive; Simultaneously comprehensive shielded layer had both played and had suppressed the externally effect of emission of electromagnetic wave, can be used as the passage of short circuit current again, can play the protective effect of neutral core.Simultaneously can effectively protect frequency converter, prolong its useful life.
In addition, because employed shielding material copper is moulded composite membrane, aluminum-plastic composite membrane is extremely thin, the physical dimension of its respective cable can reduce, cable weight saving, and the bending property of its cable is good, is convenient to laying installation.Adopt effective and reasonable high shielding construction, can reduce electromagnetic pollution, purify people's living space.
Description of drawings
Accompanying drawing is the structural representation of the utility model.
Embodiment
To combine embodiment (accompanying drawing) to further describe below the utility model:
As shown in the figure, vertically put into copper split screen drainage thread 3 outside the main insulating layer 2 that the master core of the height shielding frequency-changing cable of the utility model divides shielding construction to be employed in master core (leading body) 1, wrapped then copper is moulded composite membrane and is divided shielding parcel, 4; It is the cable core band 7 of cable stranding outside, vertically to put into the wrapped successively then aluminum-plastic composite membrane of the stranded total screen drainage thread 8 of tin-coated copper always to shield integument 9, copper and mould that composite membrane always shields integument 10, the copper wire braiding always shields integument 11 and external sheath layer 12 that the total shielding construction of cable adopts; Said aluminum-plastic composite membrane always shield integument mould towards outside; Said copper is moulded moulding towards interior of composite membrane.
The cable core of the cable stranding described in the utility model is to be 3+3 by master core core number, nominal cross mm
2For: 3 * 2.5～70+3 * 0.5～10, and three middle cores (middle conductor) 5 that are enclosed with middle insulating barrier 6 constitute; The nominal cross of described split screen drainage thread 3 is not less than 0.5 mm
2Total screen drainage thread 8 be stranded tinned wird, and adopting the tin-coated copper twisted wire is generation chemical reaction when preventing that copper cash from contacting with the aluminium face of aluminum-plastic composite membrane, influences shielding properties.Its tin-coated copper twisted wire drainage thread specification is 7 * 0.3～0.5 mm.Copper is moulded composite membrane, plastic-aluminum combined film thickness is: 0.05 ~ 0.12 mm.The braiding brass wire diameter is: 0.2 mm.The copper wire count is not less than 82%.
Claims (2)
1. one kind high shielding frequency-changing cable is characterized in that: the main insulating layer that the master core of said cable divides shielding construction to be employed in master core is vertically put into the wrapped then copper of copper split screen drainage thread outward and is moulded composite membrane and divide the shielding integument; It is outside the cable core band of cable stranding, vertically to put into the stranded total screen drainage thread of tin-coated copper that the total shielding construction of cable adopts, and wrapped successively then aluminum-plastic composite membrane always shields integument, copper is moulded composite membrane and always shielded integument, copper wire braiding total shielding integument and external sheath layer.
2. high shielding frequency-changing cable according to claim 1 is characterized in that: said aluminum-plastic composite membrane always shield integument mould towards outside; Said copper is moulded moulding towards interior of composite membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120383508 CN202258450U (en) | 2011-10-11 | 2011-10-11 | Highly shielded frequency conversion cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120383508 CN202258450U (en) | 2011-10-11 | 2011-10-11 | Highly shielded frequency conversion cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202258450U true CN202258450U (en) | 2012-05-30 |
Family
ID=46119658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120383508 Expired - Fee Related CN202258450U (en) | 2011-10-11 | 2011-10-11 | Highly shielded frequency conversion cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202258450U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751033A (en) * | 2012-07-27 | 2012-10-24 | 山东华凌电缆有限公司 | Variable frequency cable for transformer station |
-
2011
- 2011-10-11 CN CN 201120383508 patent/CN202258450U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751033A (en) * | 2012-07-27 | 2012-10-24 | 山东华凌电缆有限公司 | Variable frequency cable for transformer station |
| CN102751033B (en) * | 2012-07-27 | 2014-10-08 | 山东华凌电缆有限公司 | Variable frequency cable for transformer station |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20151011 |
|
| EXPY | Termination of patent right or utility model |