CN110600229A - Micropower combined mutual inductor - Google Patents
Micropower combined mutual inductor Download PDFInfo
- Publication number
- CN110600229A CN110600229A CN201910861804.3A CN201910861804A CN110600229A CN 110600229 A CN110600229 A CN 110600229A CN 201910861804 A CN201910861804 A CN 201910861804A CN 110600229 A CN110600229 A CN 110600229A
- Authority
- CN
- China
- Prior art keywords
- voltage capacitor
- current
- voltage
- epoxy resin
- low
- Prior art date
- 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.)
- Withdrawn
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 40
- 239000003822 epoxy resin Substances 0.000 claims abstract description 18
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000013081 microcrystal Substances 0.000 description 1
Classifications
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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
- H01F27/02—Casings
- H01F27/022—Encapsulation
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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
- H01F27/02—Casings
- H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
-
- 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
-
- 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
- H01F27/2823—Wires
- H01F27/2828—Construction of conductive connections, of leads
-
- 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
-
- 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
- H01F27/42—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils
- H01F27/422—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils for instrument transformers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
A micropower combined transformer is characterized in that a current conducting rod penetrates through a central hole of a current coil iron core, and P1 and P2 terminal connection plates are fixedly arranged at two ends of the current conducting rod respectively. And a secondary coil is wound on the current coil iron core. And epoxy resin shells are poured on the outer sides of the current coil iron core, the high-voltage capacitor and the low-voltage capacitor. Two leads of the secondary coil are respectively connected with a current signal outgoing line. The other ends of the two current signal outgoing lines penetrate out of the outer surface of the lower end base of the epoxy resin shell. One end of the high-voltage capacitor is connected to the current conducting rod. The high-voltage capacitor and the low-voltage capacitor are connected in series. Two ends of the low-voltage capacitor are respectively connected with a voltage signal outgoing line. The other ends of the two voltage signal outgoing lines penetrate out of the outer surface of the base at the lower end of the epoxy resin shell. The combined mutual inductor for metering is of a fully closed structure, reduces signal attenuation, ensures metering precision, and realizes small volume and simple and convenient installation of the whole machine.
Description
Technical Field
The invention belongs to the field of transformers, and particularly relates to a micropower combined transformer.
Background
Current outdoor measurement is with combination mutual-inductor all adopts pure electromagnetic induction formula principle to gather electric current, voltage signal, and signal strength is ampere level and volt level, and self loss is big, and insulation design is complicated, causes bulky, installs inconveniently.
Disclosure of Invention
The invention aims to provide a micropower combined transformer. The combined transformer solves the problems that the existing combined transformer for outdoor metering has large loss, complex insulation design, large volume and inconvenient installation.
In order to solve the technical problems, the technical scheme is as follows:
the utility model provides a micropower combined mutual inductor, includes current conducting rod, current coil iron core, high-voltage capacitor and low-voltage capacitor, and its technical essential lies in:
the current conducting rod passes through the center hole of the current coil iron core, and a P1 terminal wiring board and a P2 terminal wiring board are respectively fixed at the two ends of the current conducting rod. And a secondary coil is wound on the current coil iron core. And epoxy resin shells are poured on the outer sides of the current coil iron core, the high-voltage capacitor and the low-voltage capacitor.
Two leads of the secondary coil are respectively connected with a current signal outgoing line. The other ends of the two current signal outgoing lines penetrate out of the outer surface of the lower end base of the epoxy resin shell.
One end of the high-voltage capacitor is connected to the current conducting rod through an internal lead of the high-voltage capacitor. The other end of the high-voltage capacitor is connected with the low-voltage capacitor in series through a lead. Two ends of the low-voltage capacitor are respectively connected with a voltage signal outgoing line. The other ends of the two voltage signal outgoing lines penetrate out of the outer surface of the base at the lower end of the epoxy resin shell.
The P1 terminal wiring board and the P2 terminal wiring board are the same in structure and are copper bars with through holes.
Four screw holes are arranged on the lower end base of the epoxy resin shell and used for fixing.
Compared with the prior art, the method has the advantages that:
the combined mutual inductor for metering is of a fully closed structure, current and voltage are all converted into low-voltage signals which are directly transmitted to a computing circuit, signal attenuation is reduced, metering precision is guaranteed, the insulating structure can be designed simply, the size of the whole instrument is small, and the combined mutual inductor is simple and convenient to install. The high-permeability microcrystal magnetic core is adopted, the secondary signal is a 50mV voltage signal, and the secondary signal is directly supplied with power with a metering circuit of a meter, so that the power loss of the coil is reduced, the high-precision, high-reliability and anti-saturation are realized, and the precision of a current signal is ensured. The voltage signal adopts a high-voltage capacitor and a low-voltage capacitor to be connected in series to form a voltage dividing circuit to acquire a signal with the voltage of 3.25V 3mV, and the signal and a current signal are transmitted to a metering circuit together to realize electric energy metering. The transformer has good insulating property, is integrally insulated by pouring outdoor epoxy resin, ensures mechanical strength, high electrical strength and low partial discharge level, and ensures the stability of long-term operation. The column can be installed and fixed without changing the original layout, and the space is saved. The insulating materials are all insulating heat-resistant grade H, so that the insulating material can be operated at the limit temperature.
Drawings
Fig. 1 is a schematic diagram of the whole structure of the transformer.
Fig. 2 is a schematic view of the structure in the direction a in fig. 1.
Fig. 3 is a schematic view of the structure in the direction K in fig. 1.
Fig. 4 is a side view of the instrument transformer.
Fig. 5 is a front external view of the transformer.
The figures are numbered: the transformer comprises a P1 terminal wiring board 1, a current coil iron core 2, a high-voltage capacitor 3, a low-voltage capacitor 4, a current conducting rod 5, a P2 terminal wiring board 6, a screw hole 8, an epoxy resin shell 9, a current signal outgoing line 10, a voltage signal outgoing line 11 and a secondary coil 12.
Detailed Description
A micropower combined transformer comprises a current conducting rod 5, a current coil iron core 2, a high-voltage capacitor 3 and a low-voltage capacitor 4.
The current conducting rod 5 passes through the center hole of the current coil core 2, and the P1 terminal wiring board 1 and the P2 terminal wiring board 6 are respectively fixed at both ends of the current conducting rod 5. A secondary coil 12 is wound around the current coil core 2. And epoxy resin shells 9 are poured on the outer sides of the current coil iron core 2, the high-voltage capacitor 3 and the low-voltage capacitor 4.
Two leads of the secondary coil 12 are connected to a current signal lead-out wire 10, respectively. The other ends of the two current signal outgoing lines 10 penetrate through the outer surface of the lower end base of the epoxy resin shell 9.
One end of the high-voltage capacitor 3 is connected to the current conducting rod 5 through a high-voltage capacitor internal lead 7. The other end of the high-voltage capacitor 3 is connected with the low-voltage capacitor 4 in series through a lead. Two ends of the low-voltage capacitor 4 are respectively connected with a voltage signal outgoing line 11. The other ends of the two voltage signal outgoing lines 11 penetrate through the outer surface of the base at the lower end of the epoxy resin shell 9.
The P1 end wiring board 1 and the P2 end wiring board 6 are the same in structure and are copper bars with through holes.
Four screw holes 8 are formed in the lower end base of the epoxy resin casing 9 for fixing.
The current of the high-voltage line flows out from the terminal board 1 at the end P1 through the current conducting rod 5 and flows out from the terminal board 6 at the end P2, the current generates induced magnetic potential in the current coil iron core 2, and a current signal can be obtained on the current signal leading-out wire 10. The high-voltage capacitor internal lead 7 leads a 10kV signal to the high-voltage capacitor 3 from a tested line, then the low-voltage capacitor 4 divides the voltage to obtain a low-voltage signal, and the low-voltage signal is led out by a voltage signal lead-out wire 11. The whole product is formed by casting outdoor epoxy resin and can be formed in outdoor environment, and the bottom of the product is fixed by 4M 10 screw holes.
The current coil core 2 is a high-permeability microcrystalline magnetic core.
The technical parameters of the mutual inductor are as follows: voltage class: 10 kV;
current ratio: 150A-500A/50 mV accuracy 0.2S level;
voltage ratio: the precision of 10 kV/3.25V 3mV is 0.2 grade;
the electric energy loss of the equipment is as follows: 0.2 VA;
frequency: 50 Hz;
device class: outdoors.
Claims (3)
1. The utility model provides a micropower combined transformer, includes current conducting rod (5), current coil iron core (2), high voltage capacitor (3) and low voltage capacitor (4), its characterized in that:
the current conducting rod (5) penetrates through the center hole of the current coil iron core (2), and a P1 end wiring board (1) and a P2 end wiring board (6) are fixedly arranged at two ends of the current conducting rod (5) respectively; a secondary coil (12) is wound on the current coil iron core (2); epoxy resin shells (9) are poured on the outer sides of the current coil iron core (2), the high-voltage capacitor (3) and the low-voltage capacitor (4);
two leads of the secondary coil (12) are respectively connected with a current signal outgoing line (10); the other ends of the two current signal outgoing lines (10) penetrate out of the outer surface of the lower end base of the epoxy resin shell (9);
one end of the high-voltage capacitor (3) is connected to the current conducting rod (5) through an internal lead (7) of the high-voltage capacitor; the other end of the high-voltage capacitor (3) is connected with the low-voltage capacitor (4) in series through a lead; two ends of the low-voltage capacitor (4) are respectively connected with a voltage signal outgoing line (11); the other ends of the two voltage signal leading-out wires (11) penetrate out of the outer surface of the base at the lower end of the epoxy resin shell (9).
2. A micropower combined transformer according to claim 1, wherein:
the P1 terminal wiring board (1) and the P2 terminal wiring board (6) have the same structure and are copper bars with through holes.
3. A micropower combined transformer according to claim 1, wherein:
four screw holes (8) are arranged on the lower end base of the epoxy resin shell (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910861804.3A CN110600229A (en) | 2019-09-12 | 2019-09-12 | Micropower combined mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910861804.3A CN110600229A (en) | 2019-09-12 | 2019-09-12 | Micropower combined mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110600229A true CN110600229A (en) | 2019-12-20 |
Family
ID=68859178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910861804.3A Withdrawn CN110600229A (en) | 2019-09-12 | 2019-09-12 | Micropower combined mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110600229A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231312A (en) * | 2006-12-19 | 2008-07-30 | Abb技术有限公司 | Apparatus and method for improving the accuracy of instrument transformers |
| CN201758073U (en) * | 2010-08-10 | 2011-03-09 | 西安华伟光电技术有限公司 | Electronic current-voltage combination transformer |
| CN105185559A (en) * | 2015-10-14 | 2015-12-23 | 江苏嘉盈电器集团有限公司 | Medium and high voltage type combined electronic transformer |
| CN210516390U (en) * | 2019-09-12 | 2020-05-12 | 湖北大二互科技股份有限公司 | Micropower combined mutual inductor |
-
2019
- 2019-09-12 CN CN201910861804.3A patent/CN110600229A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231312A (en) * | 2006-12-19 | 2008-07-30 | Abb技术有限公司 | Apparatus and method for improving the accuracy of instrument transformers |
| CN201758073U (en) * | 2010-08-10 | 2011-03-09 | 西安华伟光电技术有限公司 | Electronic current-voltage combination transformer |
| CN105185559A (en) * | 2015-10-14 | 2015-12-23 | 江苏嘉盈电器集团有限公司 | Medium and high voltage type combined electronic transformer |
| CN210516390U (en) * | 2019-09-12 | 2020-05-12 | 湖北大二互科技股份有限公司 | Micropower combined mutual inductor |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191220 |