CN102157225A - Special cable for variable frequency motor and manufacture method thereof - Google Patents
Special cable for variable frequency motor and manufacture method thereof Download PDFInfo
- Publication number
- CN102157225A CN102157225A CN 201110074649 CN201110074649A CN102157225A CN 102157225 A CN102157225 A CN 102157225A CN 201110074649 CN201110074649 CN 201110074649 CN 201110074649 A CN201110074649 A CN 201110074649A CN 102157225 A CN102157225 A CN 102157225A
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- China
- Prior art keywords
- core
- cable
- frequency motor
- variable
- cores
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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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- 238000009954 braiding Methods 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 238000003491 array Methods 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims description 5
- 238000004132 cross linking Methods 0.000 claims description 5
- -1 polyethylene Polymers 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 230000005670 electromagnetic radiation Effects 0.000 abstract description 3
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- Communication Cables (AREA)
- Insulated Conductors (AREA)
Abstract
The invention relates to a special cable for a variable frequency motor and a manufacture method thereof. Symmetric type cabling is adapted for the core number of the cable; total shielding layers or combined type shielding layers are weaved or wrapped outside cable cores; the symmetric type cabling is realized by adopting symmetric type third-class cores or decomposing a fourth core included in common three-large one-small four-core insulating cable cores into three insulating cable cores with uniform sections and symmetrically cabling three-large three-small cable cores; and the density of the total shielding layers weaved outside the cable cores is not less than 85 percent. The special cable has electromagnetic compatibility, plays a certain role in inhibiting electromagnetic interference, can offset the odd-order frequency of high-order harmonics and enhance the anti-interference performance of the special cable for the variable frequency motor and reduces the electromagnetic radiation of an integral system.
Description
Technical field
The invention belongs to the novel cable technical field, is a kind of variable-frequency motor private cable and preparation method of being exclusively used in.
Background technology
Because the energy-saving effect of converter plant is fairly obvious, frequency conversion equipment uses more and more, supporting with it private cable (frequency conversion private cable) demand is increasing, and specification requirement is also more and more higher, and present employed common cable can't satisfy instructions for use.Frequency conversion equipment is wider relatively because of its regulating frequency scope, its output waveform no longer is sinusoidal wave, and only be a general profile of basic frequency, being also referred to as staircase waveform, it can be decomposed into sinusoidal fundamental wave and high order harmonic component. and it is as a kind of capable ripple, through repeatedly reflection, the amplitude stack makes voltage can reach system's rated voltage several times, and cable is long more, and amplitude is high more. the pulse voltage that this high order harmonic component causes is very big to the cable influence, if the cable insulation coefficient of safety is not high, then breakdown probably.With 3+E type power cable is example, and at complete three-phase system, when three-phase balance, the electric current of its ground connection core is zero; When high order harmonic component produces, through repeatedly reflecting the situation that the stack of crest and crest or trough and trough just can occur, and the long more this imagination of cable is obvious more, and for 3+E type cable, the current component that high order harmonic component produces at the earth connection in-core because of there not being phase difference, thereby may finally make the ground connection core very fast breakdown under high-frequency impulse because of superposeing up to the several times that are original component.
Summary of the invention
The present invention mainly solves Electro Magnetic Compatibility in the cable, suppress electromagnetic interference, offset the humorous odd frequency in that of high order, improves anti-interference, reduces problems such as electromagnetic radiation.
The technical solution adopted for the present invention to solve the technical problems is:
Variable-frequency motor private cable of the present invention, the core number of cable adopts the symmetrical expression stranding, braiding or wrapped total screen or combined shielding outside cable core.The symmetrical expression stranding is to adopt the third-class core of symmetrical expression or four-core in the common three big one little four-core insulated wire cores is decomposed into three prismatic insulated wire cores, three big three little core symmetry strandings.The total shielding of braiding density is not less than 85% outside cable core.
A kind of variable-frequency motor private cable preparation method, the neutral core of variable-frequency motor private cable is resolved into 3 small bore cores, get by last specification and be, on conductor thread core, extrude the thick cross-linking polyethylene materials of one deck 0.7～1.1mm as insulating barrier, with insulated wire cores according to intersecting the stranded stranding of symmetric arrays; Braiding one deck count is not less than 85% shielding always on cable core, extrudes pvc sheath.
Adopt the third-class core of symmetrical structure or four-core (neutral core) in the three big one common little four-core insulated wire cores is decomposed into three insulated wire cores that the cross section is less, get near leaning on last specification, then three big three little core symmetry strandings, increase total shielding, structure can adopt copper wire copper strips combination shielding, copper wire braid shielded (density is more than 85%), copper strips shielding etc.
Of the present inventionly have a mind to effect: electromagnetic compatibility, play a role to suppressing electromagnetic interference, can offset the humorous odd frequency in that of high order, improve the anti-interference of variable-frequency motor private cable, reduced the electromagnetic radiation in the whole system.
Embodiment
Embodiment 1:
The variable-frequency motor private cable, specification 3*16+1*10mm
2.
Copper conductor
Crosslinked polyetylene insulated
Pvc sheath
With 3*16+1*10mm
2In neutral core resolve into 3 small bore cores and (be about 3.3mm
2), getting by last specification is 4mm
2, also just become 3*16+3*4mm
2, on conductor thread core, extrude the thick cross-linking polyethylene materials of one deck 0.9/0.7mm as insulating barrier, with insulated wire cores according to intersecting the stranded stranding of symmetric arrays.Braiding one deck always shields (count is not less than 85%) or other forms always shield on cable core, extrudes pvc sheath (also can be other materials).
Embodiment 2:
The variable-frequency motor private cable, specification 3*50+1*25mm
2.
Copper conductor
Crosslinked polyetylene insulated
Pvc sheath
With 3*50+1*25mm
2In neutral core resolve into 3 small bore cores and (be about 8.3mm
2), getting by last specification is 10mm
2, also just become 3*50+3*10mm
2, on conductor thread core, extrude the thick cross-linking polyethylene materials of one deck 1.1/0.9mm as insulating barrier, with insulated wire cores according to intersecting the stranded stranding of symmetric arrays.Braiding one deck always shields (count is not less than 85%) or other forms always shield on cable core, extrudes pvc sheath.
Embodiment 3:
The variable-frequency motor private cable, specification 3*25+1*16mm
2.
Copper conductor
Crosslinked polyetylene insulated
Pvc sheath
With 3*25+1*16mm
2In neutral core resolve into 3 small bore cores and (be about 5.3mm
2), getting by last specification is 6mm
2, also just become 3*25+3*6mm
2, on conductor thread core, extrude the thick cross-linking polyethylene materials of one deck 0.9/0.7mm as insulating barrier, with insulated wire cores according to intersecting the stranded stranding of symmetric arrays.Braiding one deck always shields (count is not less than 85%) or other forms always shield on cable core, extrudes pvc sheath.
Claims (4)
1. a variable-frequency motor private cable is characterized in that the core number of cable adopts the symmetrical expression stranding, braiding or wrapped total screen or combined shielding outside cable core.
2. variable-frequency motor private cable as claimed in claim 1 is characterized in that the symmetrical expression stranding is to adopt the third-class core of symmetrical expression or four-core in the common three big one little four-core insulated wire cores is decomposed into three prismatic insulated wire cores, three big three little core symmetry strandings.
3. variable-frequency motor private cable as claimed in claim 1 is characterized in that the total shielding of braiding density is not less than 85% outside cable core.
4. variable-frequency motor private cable preparation method, it is characterized in that the neutral core of variable-frequency motor private cable is resolved into 3 small bore cores, get by last specification and be, on conductor thread core, extrude the thick cross-linking polyethylene materials of one deck 0.7～1.1mm as insulating barrier, with insulated wire cores according to intersecting the stranded stranding of symmetric arrays; Braiding one deck count is not less than 85% shielding always on cable core, extrudes pvc sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110074649 CN102157225A (en) | 2011-03-25 | 2011-03-25 | Special cable for variable frequency motor and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110074649 CN102157225A (en) | 2011-03-25 | 2011-03-25 | Special cable for variable frequency motor and manufacture method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102157225A true CN102157225A (en) | 2011-08-17 |
Family
ID=44438654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110074649 Pending CN102157225A (en) | 2011-03-25 | 2011-03-25 | Special cable for variable frequency motor and manufacture method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102157225A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394139A (en) * | 2011-11-21 | 2012-03-28 | 江苏通鼎光电股份有限公司 | Frequency conversion cable |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2651899Y (en) * | 2003-09-18 | 2004-10-27 | 江苏上上电缆集团有限公司 | Symmetric shielding electric cable for frequency converter motor |
| CN2681293Y (en) * | 2003-12-09 | 2005-02-23 | 上海摩恩电气有限公司 | Cable for 6KV high-power frequency-conversion motor |
| CN2800445Y (en) * | 2005-05-23 | 2006-07-26 | 上海摩恩电气有限公司 | 3KV frequency conversion motor cable |
| CN2845116Y (en) * | 2005-11-20 | 2006-12-06 | 江苏亨通电力电缆有限公司 | Shielded cable for frequency control of motor working below 35 KV |
| CN101740162A (en) * | 2008-11-25 | 2010-06-16 | 沈阳沈缆四环电缆制造有限公司 | Frequency converter cable with three-large and three-small symmetrically arranged cable cores |
| CN201689734U (en) * | 2010-05-20 | 2010-12-29 | 鞍山鲁丰电缆制造有限公司 | Variable frequency power cable |
-
2011
- 2011-03-25 CN CN 201110074649 patent/CN102157225A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2651899Y (en) * | 2003-09-18 | 2004-10-27 | 江苏上上电缆集团有限公司 | Symmetric shielding electric cable for frequency converter motor |
| CN2681293Y (en) * | 2003-12-09 | 2005-02-23 | 上海摩恩电气有限公司 | Cable for 6KV high-power frequency-conversion motor |
| CN2800445Y (en) * | 2005-05-23 | 2006-07-26 | 上海摩恩电气有限公司 | 3KV frequency conversion motor cable |
| CN2845116Y (en) * | 2005-11-20 | 2006-12-06 | 江苏亨通电力电缆有限公司 | Shielded cable for frequency control of motor working below 35 KV |
| CN101740162A (en) * | 2008-11-25 | 2010-06-16 | 沈阳沈缆四环电缆制造有限公司 | Frequency converter cable with three-large and three-small symmetrically arranged cable cores |
| CN201689734U (en) * | 2010-05-20 | 2010-12-29 | 鞍山鲁丰电缆制造有限公司 | Variable frequency power cable |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394139A (en) * | 2011-11-21 | 2012-03-28 | 江苏通鼎光电股份有限公司 | Frequency conversion cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110817 |