CN114256993B - Electric installation is got around package type cable - Google Patents
Electric installation is got around package type cable Download PDFInfo
- Publication number
- CN114256993B CN114256993B CN202210169510.6A CN202210169510A CN114256993B CN 114256993 B CN114256993 B CN 114256993B CN 202210169510 A CN202210169510 A CN 202210169510A CN 114256993 B CN114256993 B CN 114256993B
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- magnetic core
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention relates to a wrapping type cable electricity taking device, which comprises: the power taking ring comprises a waterproof layer, a magnetic core, a coil and an elastic sheet; the magnetic core is of an open spiral structure and is provided with two ends which are separated from each other, and the two ends of the magnetic core respectively extend along the length direction of the cable; the coil is wrapped from one end of the magnetic core to the other end; the power taking module is connected with the coil; the waterproof layer is wrapped on a spiral body formed by winding the coil around the magnetic core and is wound along the magnetic core until the coil and the magnetic core are covered; the elastic sheet covers the spiral body formed by the coil, extends along the magnetic core, is wrapped by the waterproof layer and is used for providing pre-tightening force for winding the power-taking ring on the cable; the coil is wrapped from one end of the magnetic core to the other end of the magnetic core, and then the waterproof layer is wrapped on the spiral body formed by wrapping the coil, so that the coil and the magnetic core are completely wrapped by the waterproof layer in a sealing manner, and a good waterproof effect is generated; and the magnetic core both ends are along the cable both ends along stretching the setting, have effectively avoided getting the problem that generates heat in the electricity process.
Description
Technical Field
The invention relates to the technical field of high-voltage electric technology and automatic control equipment, in particular to a wrapping type cable electricity taking device.
Background
The traditional high-voltage cable electricity taking device has many problems, and the normal operation of increasingly high-voltage overhead cables and high-voltage underground cables is a necessary condition for maintaining the stability of a power system. The online monitoring of the operation condition becomes an important link for improving the reliability of the power grid; compared with the traditional electricity taking device which adopts a half structure, the magnetic core is exposed outside and cannot be well waterproof; and the heating problem of the magnetic core exists after the magnetic core is closed; therefore, stable power supply cannot be ensured well in the root. In addition, in the cable operation monitoring system, the design of the power supply is one of the key points and difficulties; with the development of electrical technology, some current transformers and solar power generation devices are used for power taking, so that investment is large in implementation and application, wiring is complex and unreliable, and the influence of external factors such as operation environment, climate change and line load is possible, and a stable and reliable power supply mode cannot be provided.
Currently, the existing power supply technology is also continuously improved, such as an energy collection system for illuminating cables and the like, which includes power cables and energy collection equipment, and a manufacturing and maintenance method of the system; the method mainly has the following problems:
1. the silicon steel magnetic core is easy to rust, so the whole set of system has good waterproof and moistureproof effects. The patent does not have a good technical method for the waterproof and moistureproof protection of the system;
2. this patent requires passive adjustment of cables of different diameters, the words described in the patent are cited: "the system is limited by the diameter of the outer cable", so it is not a thought method if the electricity taking system is adapted to various cables;
3. the patent is applied to mine lighting; therefore, the patent does not consider how to protect the heating problem after magnetic saturation of the magnetic core when the power taking system does not consume load; when the power-taking power supply module is acted, a protection circuit when no load output exists and the power-taking mutual inductance always outputs energy needs to be considered, otherwise, a power-taking system is easily damaged due to heating and overvoltage.
The spiral shape of the magnetic core material is easily conceivable, but many problems need to be considered and many technologies need to be blended in how to design a reliable, stable and safe system.
Disclosure of Invention
The invention aims to overcome the defect that the power supply cannot be stably supplied in the prior art, and provides a wrapping type cable power taking device.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a get electric installation around package type cable, includes: the power taking ring comprises a waterproof layer, a magnetic core and a coil;
the magnetic core is of an open spiral structure and is provided with two ends which are separated from each other, and the two ends of the magnetic core respectively extend along the length direction of the cable;
the coil is wrapped on the magnetic core, and one end of the magnetic core is wrapped to the other end of the magnetic core;
the power taking module is connected with the coil;
the waterproof layer is wrapped on a spiral body formed by wrapping the coil on the magnetic core and is wound along the magnetic core until the coil and the magnetic core are covered;
the electricity taking ring is wound on the outer surface of the cable in a curling mode.
Preferably, the electricity getting ring further comprises an elastic sheet, the elastic sheet covers the spiral body formed by the coil, extends along the magnetic core, and is used for providing pre-tightening force for winding the electricity getting ring on the cable; the waterproof layer wraps the outer side of the elastic sheet and covers the elastic sheet, the coil and the magnetic core.
Preferably, the elastic sheet is deformed under a stressed state and is restored to a spiral shape under an unstressed state, and the elastic sheet is made of manganese steel.
Preferably, the magnetic core is silicon steel.
Preferably, the electric conductor of the coil is provided with an insulating material.
Preferably, the electricity taking module comprises a resonance unit, a rectification unit, an energy storage unit, a voltage detection unit, an output unit and an input unit which are integrated and electrically connected, and the coil is electrically connected with the resonance unit.
A control method of a wrapping type cable electricity taking device comprises the wrapping type cable electricity taking device, and is characterized in that the electricity taking ring is wound on the outer surface of a cable in a winding mode, and an electricity taking module is connected with a coil wrapped on a magnetic core and fixed on the cable; the power taking module comprises a resonance unit, a rectification unit, an energy storage unit, a voltage detection unit, an output unit and an input unit which are integrated and electrically connected, and the coil is electrically connected with the resonance unit;
the control method comprises the following steps:
enabling the current in the electricity taking ring to be consistent with the current frequency of the cable through the resonance unit;
the electric energy obtained by the electricity taking ring is stored to the energy storage unit through the rectifying unit; when the voltage detection unit detects that the energy storage unit reaches a threshold value, the output unit is controlled to output outwards; and when the voltage detection unit detects that the energy storage voltage is high, the input unit is started to short-circuit the coil.
Preferably, when the voltage detection unit detects that the voltage of the energy storage unit is high, the MOS tube is switched on, and the coil is short-circuited.
A manufacturing method of a wrapping type cable electricity taking device is used for manufacturing the wrapping type cable electricity taking device, and is characterized by comprising the following steps:
selecting a strip-shaped magnetic core, wrapping the coil from one end of the magnetic core to the other end of the magnetic core, and connecting the coil wrapped on the magnetic core with the power taking module; wrapping the waterproof layer on the spiral body formed by winding the coil, so that the coil and the magnetic core are completely wrapped by the waterproof layer in a sealing manner; and finally, spirally winding the sealed power taking ring on the outer surface of the cable.
Preferably, the electricity taking ring further comprises an elastic sheet,
the manufacturing method also comprises the following steps: covering the elastic sheet on one surface, far away from the cable, of the spiral body formed by the coil, and winding the waterproof layer on the outer surfaces of the elastic sheet and the coil, so that the elastic sheet, the coil and the magnetic core are completely wrapped by the waterproof layer in a sealing mode.
Compared with the prior art, the invention has the beneficial effects that: the coil is wrapped from one end of the magnetic core to the other end of the magnetic core, and then the waterproof layer is wrapped on the spiral body formed by the wrapped coil, so that the coil and the magnetic core are completely wrapped by the waterproof layer in a sealing manner, and a good waterproof effect is generated; and the magnetic core both ends are along the cable both ends along stretching the setting, have effectively avoided getting the problem that generates heat in the electricity process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural view of a power take-off ring and a high-voltage cable provided in the present invention.
Fig. 2 is a schematic structural diagram of a power extraction ring according to a first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a power extraction ring according to a second embodiment of the present invention.
Fig. 4 is a schematic structural diagram of the power-taking module.
Fig. 5 is a circuit diagram of an energy storage unit and a voltage detection module in the power-taking module.
Fig. 6 is a circuit diagram of the rectifying unit, the input unit and the voltage detecting module in the power-taking module.
Description of reference numerals:
1. taking a power ring; 10. a waterproof layer; 11. a magnetic core; 12. a coil; 13. an elastic sheet; 14. a power taking module; 140. a resonance unit; 141. a rectifying unit; 142. an energy storage unit; 143. a voltage detection unit; 144. an output unit; 145. an input unit; 2. a high voltage cable.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment of the invention provides a wrapping type cable electricity taking device which comprises an electricity taking ring 1 and an electricity taking module 14; as shown in fig. 1, the electricity taking ring 1 is wound around the outer surface of the high voltage cable 2 in a curling manner, and is used for outputting voltage through electromagnetic induction, and the electricity taking module 14 has good energy collecting and releasing functions; more specifically, as shown in fig. 2, the power taking ring 1 further includes a waterproof layer 10, a magnetic core 11 and a coil 12, the waterproof layer 10 is used for preventing the power taking ring 1 from being soaked by rainwater, in this embodiment, the waterproof layer 10 is preferably made of a tpu flexible material, so that the power taking ring 1 can be suitably applied to various working environments, and the magnetic core 11 is matched with the coil 12 for conduction; the magnetic core 11 has an open spiral structure and has two ends separated from each other; specifically, the magnetic core 11 is wound on the outer surface of the high-voltage cable 2 in a curling manner, and two ends of the magnetic core 11 are arranged along two ends of the cable in an extending manner, so that the phenomenon that the electricity safety is influenced due to heat generated by the closing of the magnetic core 11 is avoided; the coil 12 is wrapped on the magnetic core 11 to ensure that the electricity taking ring 1 is magnetically conducted, and the length of the coil 12 can ensure that one end of the magnetic core 11 is wrapped to the other end; specifically, the power taking module 14 is connected with two ends of the coil 12 to control the collection and release of electric energy.
It is noted that the waterproof layer 10 is wrapped on a spiral body formed by winding the coil 12 and is wound along the magnetic core 11. So that the coil 12 and the magnetic are completely sealed by the waterproof layer 10; the magnetic core 11 or the coil 12 is prevented from being exposed outside, and short circuit is caused by factors such as rainwater and the like, so that the electricity utilization safety is influenced; the electricity getting ring 1 after the sealing and wrapping is finished is wound on the outer surface of the high-voltage cable 2 in a bending mode.
In some embodiments, the electricity-taking ring 1 further includes an elastic piece 13; as shown in fig. 3, the elastic sheet 13 facilitates the winding of the electricity taking ring 1 and the high voltage cable 2, and is freely adjusted according to the diameter of the high voltage cable 2; in addition, the elastic sheet 13 covers the spiral body formed by the coil 12 and extends along the magnetic core 11 to provide a pretightening force for winding the electricity taking ring 1 on the high-voltage cable 2; furthermore, waterproof layer 10 wraps up in the outside of flexure strip 13, and the waterproof layer 10 of being convenient for wraps up flexure strip 13 in waterproof layer 10 when wrapping up magnetic core 11 and coil 12, avoids because of the sealed not tight safety problem of bringing of power consumption of parcel.
Specifically, the elastic sheet 13 can deform under a stressed state and restore to a spiral shape under an unstressed state; when the elastic sheet 13 is matched with the electricity taking ring 1 for use, the electricity taking ring 1 can be in a flat or stretched state under the action of external force in advance under the condition that the high-voltage cable 2 is not electrified; when no external force is applied to the outer surface of the high-voltage cable 2, the electricity taking ring 1 will be restored to spiral shape and wound on the outer surface of the high-voltage cable 2 under the action of the elastic sheet 13, in this embodiment, the elastic sheet 13 is preferably made of manganese steel.
Specifically, in this embodiment, the magnetic core 11 is preferably made of silicon steel, and the magnetic core 11 is made of a plurality of silicon steel sheets and has a certain flexibility; the silicon steel material has the characteristics of high magnetic permeability, low coercive force, large resistance coefficient and the like, so that the hysteresis loss and the eddy current loss are small, and the plasticity of the silicon steel material is convenient to be matched and wound with the high-voltage cable 2.
Specifically, the coil 12 is made of an electrically insulated conductive material; and is made of any malleable conductive material such as aluminum, silver, gold, electrically insulating (preferably annealed) enameled copper.
As shown in fig. 4, the power-taking module 14 further includes an integrated resonance unit 140, a rectification unit 141, an energy storage unit 142, a voltage detection unit 143, an output unit 144, and an input unit 145, wherein the resonance unit 140 is connected in parallel with the coil 12, and the resonance frequency is tuned to be consistent with the current frequency of the high-voltage cable 2 through a resonance circuit; the rectifying unit 141 converts the ac power into dc power through a rectifier bridge and stores the dc power in the energy storage unit 142; the voltage detection unit 143 is configured to detect voltages at the input terminal and the output terminal; the output unit 144 and the input unit 145 are used for controlling the input and output of the power in cooperation with the voltage detection unit 143.
In addition, the wrapping type cable electricity taking device further comprises a control method, the wrapping type electricity taking device comprises any one of the wrapping type electricity taking devices, and the wrapping type cable electricity taking device specifically comprises the following steps: the power taking ring 1 is wound on the outer surface of the high-voltage cable 2 in a curling manner, the power taking module 14 is connected with a coil 12 wound on the magnetic core 11 and fixed on the high-voltage cable 2, the current in the power taking ring 1 is kept consistent with the frequency of the current of the cable through the resonance unit 140, and the electric energy obtained by the power taking ring 1 is stored in the energy storage unit 142 through the rectification unit 141; specifically, as shown in fig. 4 and 5, when the voltage detection unit 143 detects that the energy storage unit 142 reaches the threshold, the energy storage unit 142 is linked with the output unit 144 to control the external output; as shown in fig. 4 and 6, when the voltage detecting unit 143 detects that the energy storage voltage of the energy storage unit 142 is high, the MOS transistor of the input unit 145 is activated to short-circuit the wound coil 12 on the magnetic core 11 for protecting the power-taking module 14.
Specifically, the wrapping type cable electricity taking device further comprises a manufacturing method used for manufacturing any one of the wrapping type electricity taking devices, and the method specifically comprises the following steps: selecting a strip-shaped magnetic core 11, preferably, the magnetic core 11 is made of silicon steel in this embodiment, and winding the coil 12 from one end of the magnetic core 11 to the other end of the magnetic core 11; after the winding of the coil 12 is finished, connecting the power taking module 14 with the coil 12 wound on the magnetic core 11; at this time, the waterproof layer 10 is wrapped on the spiral body formed by wrapping the coil 12, so that the coil 12 and the magnetic core 11 are completely sealed and wrapped by the waterproof layer 10; and finally, winding the electricity taking ring 1 which is subjected to sealing wrapping spirally on the outer surface of the high-voltage cable 2.
In some embodiments, an elastic sheet 13 is further included; the specific manufacturing method comprises the following steps: when the electricity taking module 14 is successfully connected with the wound coil 12 on the magnetic core 11; at this moment, the elastic sheet 13 is in a flat stretching state, covers the side of the spiral body formed by the coil 12 far away from the high-voltage cable 2, and then the waterproof layer 10 is wound on the outer surfaces of the elastic sheet 13 and the coil 12, so that the waterproof layer 10 completely seals and wraps the magnetic core 11, the coil 12 and the elastic sheet 13 when being sealed and wrapped, and the influence of rainwater on the use process or external factors is avoided.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (9)
1. The utility model provides a get electric installation around package type cable which characterized in that includes: the power taking ring comprises a waterproof layer, a magnetic core, a coil and an elastic sheet;
the magnetic core is of an open spiral structure and is provided with two ends which are separated from each other, and the two ends of the magnetic core respectively extend along the length direction of the cable;
the coil is wrapped on the magnetic core, and one end of the magnetic core is wrapped to the other end of the magnetic core;
the power taking module is connected with the coil;
the waterproof layer is wrapped on a spiral body formed by wrapping the coil on the magnetic core and is wound along the magnetic core until the coil and the magnetic core are covered;
the electricity taking ring is wound on the outer surface of the cable in a curling manner;
the elastic sheet covers the spiral body formed by the coil, extends along the magnetic core and is used for providing pre-tightening force for winding the electricity taking ring on the cable; the waterproof layer wraps the outer side of the elastic sheet and covers the elastic sheet, the coil and the magnetic core.
2. The electric taking device for the lapped cable according to claim 1, wherein the elastic sheet is deformed under a stress state and is restored to a spiral shape under an unstressed state, and the elastic sheet is made of manganese steel.
3. The wrapping type cable power taking device according to claim 1, wherein the magnetic core is silicon steel.
4. The wrapping type cable power taking device according to claim 1, wherein an electric conductor of the coil is made of an insulating material.
5. The around type cable electricity taking device according to claim 1, wherein the electricity taking module comprises a resonance unit, a rectification unit, an energy storage unit, a voltage detection unit, an output unit and an input unit which are integrated and electrically connected, and the coil is electrically connected with the resonance unit.
6. A control method of a wrapping type cable electricity taking device comprises the wrapping type cable electricity taking device as claimed in any one of claims 1 to 5, and is characterized in that the electricity taking ring is wound on the outer surface of a cable in a winding mode, and the electricity taking module is connected with a coil wrapped on a magnetic core and fixed on the cable; the power taking module comprises a resonance unit, a rectification unit, an energy storage unit, a voltage detection unit, an output unit and an input unit which are integrated and electrically connected, and the coil is electrically connected with the resonance unit;
the control method comprises the following steps:
enabling the current in the electricity taking ring to be consistent with the current frequency of the cable through the resonance unit;
the electric energy obtained by the electricity taking ring is stored to the energy storage unit through the rectifying unit; when the voltage detection unit detects that the energy storage unit reaches a threshold value, the output unit is controlled to output outwards; and when the voltage detection unit detects that the voltage of the energy storage unit is high, the input unit is started to short-circuit the coil.
7. The control method of the wrapping type cable power taking device according to claim 6, wherein the MOS tube is turned on when the voltage detection unit detects that the voltage of the energy storage unit is high, and the coil is short-circuited.
8. A manufacturing method of a wrapping type cable electricity taking device, which is used for manufacturing the wrapping type cable electricity taking device according to any one of claims 1 to 5, and is characterized by comprising the following steps:
selecting a strip-shaped magnetic core, wrapping the coil from one end of the magnetic core to the other end of the magnetic core, and connecting the coil wrapped on the magnetic core with the power taking module; wrapping the waterproof layer on the spiral body formed by winding the coil, so that the coil and the magnetic core are completely wrapped by the waterproof layer in a sealing manner; and finally, spirally winding the sealed power taking ring on the outer surface of the cable.
9. The manufacturing method of the wrapping type cable electricity taking device according to claim 8, wherein the electricity taking ring further comprises an elastic sheet,
the manufacturing method also comprises the following steps: covering the surface of the spiral body formed by the coil, which is far away from the cable, with the elastic sheet in a flat stretching state, and then winding the waterproof layer on the outer surfaces of the elastic sheet and the coil, so that the elastic sheet, the coil and the magnetic core are completely sealed and wrapped by the waterproof layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210169510.6A CN114256993B (en) | 2022-02-24 | 2022-02-24 | Electric installation is got around package type cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210169510.6A CN114256993B (en) | 2022-02-24 | 2022-02-24 | Electric installation is got around package type cable |
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| CN114256993A CN114256993A (en) | 2022-03-29 |
| CN114256993B true CN114256993B (en) | 2022-06-21 |
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Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| IN2015DN01401A (en) * | 2012-08-17 | 2015-07-03 | Gómez Mariano López | |
| US10468180B2 (en) * | 2017-08-18 | 2019-11-05 | Rosemount Aerospace Inc. | Electromagnetic energy harvester for aircraft applications |
| CN207896717U (en) * | 2018-02-05 | 2018-09-21 | 郑州泰恩科技有限公司 | A kind of CT electricity getting devices for energy monitoring apparatus |
| CN112185614B (en) * | 2019-07-03 | 2021-12-03 | 江苏亨通线缆科技有限公司 | Double-layer sheath spiral cable and manufacturing process thereof |
| CN111030312A (en) * | 2019-12-25 | 2020-04-17 | 唐山东唐电气股份有限公司 | High-voltage bus induction electricity taking device and method |
| CN211427999U (en) * | 2020-03-18 | 2020-09-04 | 中山市百纳电子科技有限公司 | Novel high-sensitivity magnetic bar inductor |
| CN211980338U (en) * | 2020-05-13 | 2020-11-20 | 东莞奇力新电子有限公司 | Inductor that possesses safeguard function |
| CN212934212U (en) * | 2020-09-24 | 2021-04-09 | 沈阳电缆集团有限公司 | Anti-twisting cable |
| CN213583423U (en) * | 2020-12-10 | 2021-06-29 | 深圳市万泰荣力光电科技有限公司 | Inductor that radiating effect is good |
| CN214255866U (en) * | 2021-03-25 | 2021-09-21 | 重庆理工大学 | Double-coil inner and outer ring type energy taking device on transmission line |
| CN113539551B (en) * | 2021-06-24 | 2022-04-22 | 安徽太平洋电缆股份有限公司 | Flexible D-type communication power supply special cable |
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