CN2651899Y - Symmetric shielding electric cable for frequency converter motor - Google Patents
Symmetric shielding electric cable for frequency converter motor Download PDFInfo
- Publication number
- CN2651899Y CN2651899Y CN 03279377 CN03279377U CN2651899Y CN 2651899 Y CN2651899 Y CN 2651899Y CN 03279377 CN03279377 CN 03279377 CN 03279377 U CN03279377 U CN 03279377U CN 2651899 Y CN2651899 Y CN 2651899Y
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- core
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- screen
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- cable
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Abstract
The utility model relates to a special symmetrical shielded cable, which is used for connecting a variable-frequency motor with a variable-frequency power source, and comprises three main wire cores (1), three neutral wire cores (2), a stuffing (5) and a sleeve (8). The utility model is characterized in that: the neutral wire cores (2) and the main wire cores (1) are symmetrically arranged to form a cable core. A lining layer (6) and a shielding layer (7) are coiled between the cable core and the sleeve (8). As a special symmetrical shielded cable for variable-frequency motors, the cable has the advantages of excellent shielding performance and capacity to resist interference from antistatic coupling, electromagnetic induction, electric wave and power wire conduction.
Description
Affiliated technical field
The utility model relates to a kind of cable, and the connection between especially a kind of variable-frequency motor and the variable frequency power supply shields private cable with symmetry.
Background technology
At present, the equipment of the each side that domestic and international variable-frequency control technique comprises has reached quite high level, but the stube cable between variable-frequency motor and the variable frequency power supply does not but obtain enough attention.Usually adopted the power cable of general four-core in the past, this cable is by three master core and neutral core stranding cores that the cross section is less that the cross section is bigger, between the master core and and neutral core between fill filler, extrude sheath again.This cable is nonreactive Electrostatic Coupling and anti-electromagnetic induction ability in use, makes cable that very short problem of puncture, useful life be arranged within a short period of time.
Summary of the invention
The purpose of this utility model provides a kind of excellent shielding properties that possesses, and can reach the variable-frequency motor symmetry shielding private cable of antistatic coupling, electromagnetic induction, electric wave and power line conducted interference.
The technical solution of the utility model is: adopt three bigger master core and three less neutral core symmetric arrays in cross section in cross section to be twisted into cable core, increase an inner covering and a screen again after filling filler.
Further, described screen can be that copper wire twines and copper strips is dredged around the double structure shielding, or wrapped shielding of copper strips or copper wire braid shielded.
Further, the screen nominal cross must be at least every phase master core the conductor nominal cross 10%, the summation in the cross-sectional area of conductor of neutral core and screen cross section should be at least every master core mutually the conductor nominal cross 50%.
Further, the conductor of described master core and neutral core adopts the conductor or the stranded compact conductor of the soft combining structure of thin copper wire bundle strand and multiple strand.
Owing to adopted technique scheme, adopt three big three little core symmetries to be twisted into cable core, compare with common power cable and have the exchange effect, can partly suppress to disturb; Adopt copper wire winding and copper strips to dredge around the double structure shielding, or wrapped shielding of copper strips or copper wire braid shielded, electromagnetic radiation, antistatic coupling, electromagnetic induction etc. can effectively be suppressed.When circuit high order occurred and dives the ripple current component, screen electric current summation was zero, does not produce to external world and disturbs.This construction of cable has lower and uniformly just (contrary) preface and zero sequence impedance, and the resistance value of screen under the zero sequence operating state is more much lower than common cable, helps the safe operation of cable and other relevant device.
Description of drawings
Below in conjunction with accompanying drawing and example this enforcement is further described with novel.
Fig. 1 is cross section structure figure of the present utility model.
Among the figure: 1, master core, 2, neutral core, 3, conductor, 4, insulation, 5, filler, 6, inner covering, 7, screen, 8, oversheath, 9, conductor.
Embodiment 1: among the embodiment as shown in Figure 1, the conductor 3 of master core 1 and the conductor 9 of neutral core 2 all adopt the conductor or the stranded compact conductor of the soft combining structure of thin copper wire bundle strand and multiple strand; The conductor 3 of master core 1 and the conductor of neutral core 29 outer extruded insulations 4.Three identical master cores 1 in cross section are twisted into cable core with three identical neutral core 2 symmetric arrays in cross section, insert filler 5 in the space between six roots of sensation insulated wire cores, wrapped then inner covering 6 twines with copper wire again and copper strips is dredged around forming double structure screen 7, extrudes oversheath 8 at last.Screen 7 nominal crosss be every phase master core 1 conductor 3 nominal crosss 20%, conductor 9 cross sections of neutral core 2 and the summation in screen 7 cross sections be every master core mutually 1 conductor 3 nominal crosss 60%.This structure can make lead that the exchange effect is arranged, can effectively suppress electromagnetic radiation, static electromagnetic induction, electric wave, imperfect earth and power line conducted interference etc., when circuit high order occurred and dives the ripple current component, screen electric current summation was zero, does not produce to external world and disturbs.This construction of cable has lower and uniformly just (contrary) preface and zero sequence impedance, and the resistance value of screen under the zero sequence operating state is more much lower than common cable, helps the safe operation of cable and other relevant device.
Embodiment 2: screen 7 is set to the wrapped screen of copper strips, screen 7 nominal crosss be every phase master core 1 conductor 3 nominal crosss 10%, conductor 9 cross sections of neutral core 2 and the summation in screen 7 cross sections be every master core mutually 1 conductor 3 nominal crosss 50%, other are identical with embodiment 1.
Embodiment 3: screen 7 is set to screen with copper wire braiding, screen 7 nominal crosss be every phase master core 1 conductor 3 nominal crosss 12%, conductor 9 cross sections of neutral core 2 and the summation in screen 7 cross sections be every master core mutually 1 conductor 3 nominal crosss 55%, other are identical with embodiment 1.
Claims (7)
1, a kind of variable-frequency motor symmetry shielding private cable, by master core (1), neutral core (2), filler (5), sheath (8) is formed, master core (1) is made up of conductor (3) and insulation (4), neutral core (2) is made up of conductor (9) and insulation (4), master core (1) has three, master core (1) is twisted into cable core with neutral core (2), between each core, fill filler (5), extrude one deck sheath (8) again, it is characterized in that neutral core (2) has three, three master cores (1) and three neutral cores (2) symmetric arrays have an inner covering (6) and a screen (7) from the inside to the outside between cable core and sheath (8).
2, variable-frequency motor according to claim 1 symmetry shielding private cable, it is characterized in that screen (7) be adopt copper wire to twine and copper strips thin around the double structure screen.
3, variable-frequency motor symmetry shielding private cable according to claim 1 is characterized in that screen (7) is to adopt the wrapped screen of copper strips.
4, variable-frequency motor symmetry shielding private cable according to claim 1 is characterized in that screen (7) is the screen that adopts the copper wire braiding.
5, according to claim 1,2,3 or 4 described variable-frequency motor symmetry shielding private cables, it is characterized in that screen (7) nominal cross is not less than 10% with the ratio of conductor (3) nominal cross of every master core mutually (1), conductor (9) cross section of neutral core (2) cut with conductor (3) nominal of every master core mutually (1) with the summation in screen (7) cross section and ratio be not less than 50%.
6, variable-frequency motor according to claim 5 symmetry shielding private cable, the conductor (9) that it is characterized in that the conductor (3) of master core (1) and neutral core (2) adopts the conductor of thin copper wire bundle strand and multiple soft combining structure of twisting.
7, variable-frequency motor symmetry shielding private cable according to claim 5 is characterized in that the conductor (3) of master core (1) and the conductor (9) of neutral core (2) adopt stranded compact conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03279377 CN2651899Y (en) | 2003-09-18 | 2003-09-18 | Symmetric shielding electric cable for frequency converter motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03279377 CN2651899Y (en) | 2003-09-18 | 2003-09-18 | Symmetric shielding electric cable for frequency converter motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2651899Y true CN2651899Y (en) | 2004-10-27 |
Family
ID=34332289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03279377 Expired - Fee Related CN2651899Y (en) | 2003-09-18 | 2003-09-18 | Symmetric shielding electric cable for frequency converter motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2651899Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923916A (en) * | 2010-05-10 | 2010-12-22 | 兴乐集团宁夏电缆有限公司 | Variable frequency power generator cable with control wire core |
| CN102157225A (en) * | 2011-03-25 | 2011-08-17 | 天津市津特线缆有限责任公司 | Special cable for variable frequency motor and manufacture method thereof |
| CN102623099A (en) * | 2012-04-27 | 2012-08-01 | 无锡市群星线缆有限公司 | Low-voltage cable special for frequency converter |
| CN104103370A (en) * | 2013-04-10 | 2014-10-15 | 江苏远红电缆有限公司 | Crosslinked polyethylene insulated copper wire copper strip shielding frequency converter cable |
| CN104282386A (en) * | 2014-08-28 | 2015-01-14 | 四川顶锐液压设备制造有限公司 | Power supply cable provided with symmetrical cable cores and applied to hydraulic pump station |
-
2003
- 2003-09-18 CN CN 03279377 patent/CN2651899Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923916A (en) * | 2010-05-10 | 2010-12-22 | 兴乐集团宁夏电缆有限公司 | Variable frequency power generator cable with control wire core |
| CN102157225A (en) * | 2011-03-25 | 2011-08-17 | 天津市津特线缆有限责任公司 | Special cable for variable frequency motor and manufacture method thereof |
| CN102623099A (en) * | 2012-04-27 | 2012-08-01 | 无锡市群星线缆有限公司 | Low-voltage cable special for frequency converter |
| CN104103370A (en) * | 2013-04-10 | 2014-10-15 | 江苏远红电缆有限公司 | Crosslinked polyethylene insulated copper wire copper strip shielding frequency converter cable |
| CN104282386A (en) * | 2014-08-28 | 2015-01-14 | 四川顶锐液压设备制造有限公司 | Power supply cable provided with symmetrical cable cores and applied to hydraulic pump station |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |