CN110828127A - High-frequency micro-electric protection mutual inductor - Google Patents
High-frequency micro-electric protection mutual inductor Download PDFInfo
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- CN110828127A CN110828127A CN201911129959.4A CN201911129959A CN110828127A CN 110828127 A CN110828127 A CN 110828127A CN 201911129959 A CN201911129959 A CN 201911129959A CN 110828127 A CN110828127 A CN 110828127A
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- primary coil
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2895—Windings disposed upon ring cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/24—Voltage transformers
- H01F38/26—Constructions
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention relates to a high-frequency micro-protection mutual inductor which comprises a closed iron core formed by two magnetic cores made of high-frequency ferrite soft magnetic materials, wherein a primary coil and a secondary coil are respectively arranged on the two magnetic cores, and two leading-out ends of the primary coil are respectively connected with a high-resistance resistor in series. The primary coil and the secondary coil are wound by adopting an enameled copper wire in a multi-layer mode, and the number of winding turns is more than 4000. The enameled copper wires for the primary coil and the secondary coil are of the same specification, the diameter of each enameled copper wire is smaller than 0.1mm, and three strands of stranded wires are led out in the last circle during lead-out. The resistance value of the high-resistance resistor is 330 kilo-ohms. Two cores of high-frequency ferrite soft magnetic material adopt ER cores. The invention has strong anti-electromagnetic interference capability, prevents the pollution of the power grid such as surge current generated in power generation, is widely used for micro-electric protection of wind power generation, electric transmission, subway and the like, and effectively prevents electromagnetic noise and jitter.
Description
Technical Field
The invention relates to the technical field of voltage transformers, in particular to a high-frequency micro-protection transformer.
Background
The basic structure of the voltage transformer is similar to that of the transformer, and comprises two windings: a primary winding and a secondary winding, both of which are mounted or wound on the core. Insulation is arranged between the two windings and between the windings and the iron core, so that the two windings and between the windings and the iron core are electrically isolated. When the voltage transformer is in operation, the primary winding is connected in parallel on the line, and the secondary winding is connected in parallel with the instrument or the relay. The number of turns of the primary winding is more, and the number of turns of the secondary winding is less. The primary voltage is very high and the secondary voltage is low.
In the prior art, an iron core of a voltage transformer is generally formed by overlapping silicon steel, so that the transformer is easy to generate electromagnetic noise and shake when the transformer runs for a long time and is often in a severe environment; surge voltage applied to a power generation system is easy to damage a mutual inductor and a circuit system.
Disclosure of Invention
The applicant aims at the defects in the prior art and provides a high-frequency micro-protection mutual inductor with a reasonable structure, which consists of a closed ferrite soft magnetic core and a winding, wherein the number of turns of a primary coil and a secondary coil is more, and the primary coil and the secondary coil are connected in parallel in a line for monitoring and measuring and are used for acquiring a control voltage signal and effectively preventing electromagnetic noise and jitter.
The technical scheme adopted by the invention is as follows:
a high-frequency micro-protection mutual inductor comprises a closed iron core formed by two magnetic cores made of high-frequency ferrite soft magnetic materials, wherein a primary coil and a secondary coil are respectively arranged on the two magnetic cores, and two leading-out ends of the primary coil are respectively connected with a high-resistance resistor in series.
As a further improvement of the above technical solution:
the primary coil and the secondary coil are wound by adopting an enameled copper wire in a multi-layer mode, and the number of winding turns is more than 4000.
The enameled copper wires for the primary coil and the secondary coil are of the same specification, the diameter of each enameled copper wire is smaller than 0.1mm, and three strands of stranded wires are led out in the last circle during lead-out.
The resistance value of the high-resistance resistor is 330 kilo-ohms.
Two cores of high-frequency ferrite soft magnetic material adopt ER cores.
The primary coil is connected with the high-resistance resistor in series and then connected with the silica gel flexible lead and the JST terminal.
The outgoing line of the secondary coil is fixed on the pin of the plastic skeleton.
And a circle of insulating copper foil tape is wound between the primary coil and the secondary coil for isolation shielding, and four ends of the shielding winding are led out and pins are fixed.
And installing the iron cores of the primary coil and the secondary coil, fixing the iron cores through a clamping frame, and dipping in paint.
The invention has the following beneficial effects:
the invention has strong anti-electromagnetic interference capability, prevents the pollution of the power grid such as surge current generated in power generation, is widely used for micro-electric protection of wind power generation, electric transmission, subway and the like, and effectively prevents electromagnetic noise and jitter. Meanwhile, the invention also has the following advantages:
two leading-out ends of the primary coil are respectively connected with a high-resistance resistor in series to prevent the damage of surge voltage to the mutual inductor and a circuit system;
the iron core magnetic material is made of a high-frequency ferrite soft magnetic material, and two ER magnetic cores are assembled into a closed loop, so that the integrity is strong, and the risk of multilayer lamination noise of silicon steel sheet magnetic materials is avoided;
the invention has small volume and light weight, the primary coil adopts a wire terminal, the secondary coil adopts stitch welding to lead out, and the installation mode is flexible and reliable.
The primary coil and the secondary coil are completely and reliably isolated by the copper strip, so that the interference of the primary coil to the secondary loop is completely shielded, and the reliability of a control loop system is ensured.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Wherein: 1. fixing pins; 2. an iron core; 3. a secondary coil; 4. an insulating copper foil tape; 5. a primary coil; 6. a high resistance resistor.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, the high-frequency micro-protection transformer of the present embodiment includes a closed core 2 formed by two magnetic cores made of high-frequency ferrite soft magnetic material, a primary coil 5 and a secondary coil 3 are respectively disposed on the two magnetic cores, and two leading-out terminals of the primary coil 5 are respectively connected in series with a high-resistance resistor 6.
The primary coil 5 and the secondary coil 3 are wound by adopting an enameled copper wire in a multi-layer mode, and the number of winding turns is more than 4000.
The enameled copper wires for the primary coil 5 and the secondary coil 3 are of the same specification, the diameter of each enameled copper wire is smaller than 0.1mm, and three strands of stranded wires are led out in the last circle during lead-out.
The high resistance resistor 6 has a resistance of 330 kilo-ohms.
Two cores of high-frequency ferrite soft magnetic material adopt ER cores.
The primary coil 5 is connected in series with the high-resistance resistor 6 and then connected with a silica gel flexible lead and a JST terminal 7.
The outgoing line of the secondary coil 3 is fixed on the pin of the plastic skeleton.
A circle of insulating copper foil tape 4 is wound between the primary coil 5 and the secondary coil 3 for isolation and shielding, and four ends of the shielding winding are led out and pin 1 is fixed.
The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.
Claims (9)
1. A high-frequency micro-electric protection mutual inductor is characterized in that: the closed magnetic core comprises a closed iron core formed by two magnetic cores made of high-frequency ferrite soft magnetic materials, a primary coil and a secondary coil are respectively arranged on the two magnetic cores, and two leading-out ends of the primary coil are respectively connected with a high-resistance resistor in series.
2. The high frequency micro-protective transformer according to claim 1, characterized in that: the primary coil and the secondary coil are wound by adopting an enameled copper wire in a multi-layer mode, and the number of winding turns is more than 4000.
3. The high frequency micro-protective transformer according to claim 2, wherein: the enameled copper wires for the primary coil and the secondary coil are of the same specification, the diameter of each enameled copper wire is smaller than 0.1mm, and three strands of stranded wires are led out in the last circle during lead-out.
4. The high frequency micro-protective transformer according to claim 1, characterized in that: the resistance value of the high-resistance resistor is 330 kilo-ohms.
5. The high frequency micro-protective transformer according to claim 1, characterized in that: two cores of high-frequency ferrite soft magnetic material adopt ER cores.
6. The high frequency micro-protective transformer according to claim 1, characterized in that: the primary coil is connected with the high-resistance resistor in series and then connected with the silica gel flexible lead and the JST terminal.
7. The high frequency micro-protective transformer according to claim 5, characterized in that: the outgoing line of the secondary coil is fixed on the pin of the plastic skeleton.
8. The high frequency micro-protective transformer according to claim 1, characterized in that: and a circle of insulating copper foil tape is wound between the primary coil and the secondary coil for isolation and shielding, and pins are led out from four ends of the shielding winding and fixed.
9. The high frequency micro-protective transformer according to claim 1, characterized in that: and installing the iron cores of the primary coil and the secondary coil, fixing the iron cores through a clamping frame, and dipping in paint.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910865864 | 2019-09-09 | ||
| CN2019108658642 | 2019-09-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110828127A true CN110828127A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911129959.4A Pending CN110828127A (en) | 2019-09-09 | 2019-11-18 | High-frequency micro-electric protection mutual inductor |
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| CN (1) | CN110828127A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112038069A (en) * | 2020-07-28 | 2020-12-04 | 中广核核电运营有限公司 | Online repair method for secondary winding outgoing line of current transformer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1890393A1 (en) * | 2006-08-16 | 2008-02-20 | SEMIKRON Elektronik GmbH & Co. KG | Method for transmitting pulses and switching assembly for carrying out this method |
| JP4283273B2 (en) * | 2003-03-19 | 2009-06-24 | 株式会社ネットインデックス | Modem coupling circuit for power line carrier |
| CN201574749U (en) * | 2009-12-29 | 2010-09-08 | 中国石油集团西部钻探工程有限公司测井公司 | Logging ground or downhole signal receiving circuit |
| CN102570632A (en) * | 2012-03-28 | 2012-07-11 | 姬志强 | Non-conductor contact electric energy transmission method adopting limiting device protection |
| CN202523539U (en) * | 2011-11-15 | 2012-11-07 | 特变电工股份有限公司 | Converter transformer |
| CN108183014A (en) * | 2017-12-04 | 2018-06-19 | 国网河南省电力公司滑县供电公司 | A kind of voltage transformer |
| US20190267798A1 (en) * | 2018-02-27 | 2019-08-29 | David Meisel | Electrical power transformer and motor pre-fluxing device |
-
2019
- 2019-11-18 CN CN201911129959.4A patent/CN110828127A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4283273B2 (en) * | 2003-03-19 | 2009-06-24 | 株式会社ネットインデックス | Modem coupling circuit for power line carrier |
| EP1890393A1 (en) * | 2006-08-16 | 2008-02-20 | SEMIKRON Elektronik GmbH & Co. KG | Method for transmitting pulses and switching assembly for carrying out this method |
| CN201574749U (en) * | 2009-12-29 | 2010-09-08 | 中国石油集团西部钻探工程有限公司测井公司 | Logging ground or downhole signal receiving circuit |
| CN202523539U (en) * | 2011-11-15 | 2012-11-07 | 特变电工股份有限公司 | Converter transformer |
| CN102570632A (en) * | 2012-03-28 | 2012-07-11 | 姬志强 | Non-conductor contact electric energy transmission method adopting limiting device protection |
| CN108183014A (en) * | 2017-12-04 | 2018-06-19 | 国网河南省电力公司滑县供电公司 | A kind of voltage transformer |
| US20190267798A1 (en) * | 2018-02-27 | 2019-08-29 | David Meisel | Electrical power transformer and motor pre-fluxing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112038069A (en) * | 2020-07-28 | 2020-12-04 | 中广核核电运营有限公司 | Online repair method for secondary winding outgoing line of current transformer |
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Application publication date: 20200221 |