CN106910600B - A kind of current transformer that saturation current is controllable - Google Patents
A kind of current transformer that saturation current is controllable Download PDFInfo
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- CN106910600B CN106910600B CN201710110303.2A CN201710110303A CN106910600B CN 106910600 B CN106910600 B CN 106910600B CN 201710110303 A CN201710110303 A CN 201710110303A CN 106910600 B CN106910600 B CN 106910600B
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- iron core
- closed
- groove
- current
- colloid
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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
- H01F38/28—Current transformers
- H01F38/30—Constructions
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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
- H01F27/08—Cooling; Ventilating
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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
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
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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
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
-
- 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
- H01F27/24—Magnetic cores
- H01F27/255—Magnetic cores made from particles
-
- 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
-
- 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
- H01F38/28—Current transformers
- H01F38/30—Constructions
- H01F2038/305—Constructions with toroidal magnetic core
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The present invention provides a kind of current transformers that saturation current is controllable, including：Annular plastics shell, for accommodating mutual inductor；Annular is iron core-closed, is of coupled connections, is placed in the plastic casing with primary circuit；At least one secondary coil, be wound on it is described it is iron core-closed on, have at least one groove on the iron core-closed lateral surface, the depth of the groove is less than the iron core-closed thickness；It is characterized in that：The groove is two parallel grooves of the parallel iron core-closed busbar, and two parallel grooves are connected at one end, and liquid line is provided in the groove.
Description
Technical field
The present invention relates to a kind of current transformer more particularly to a kind of current transformer that saturation current is controllable and its uses
Method.
Background technology
Current transformer is the component that electric current conversion is carried out according to electromagnetic induction principle, extensively using in the power system,
Play unsteady flow and electrical isolation.Current transformer is made of iron core-closed and winding, and winding includes primary side and secondary side
Winding, first side winding are serially connected in primary circuit, and secondary side winding is serially connected in load circuit.It can be roughly divided into according to purposes
Verification of Measuring Current Transformer, protective current transformer, take energy Current Transformer etc..
The task that electronic breaker Current Transformer generally will be completed at the same time current detecting and power for electronic unit,
Above-mentioned two functions are completed at the same time using a current transformer in current most of circuit breakers.Using single electric current mutual inductance
Device still has some problems：When electric current is smaller, because causing electronic unit can not work normally for electric flux deficiency；When electric current compared with
When big, such as more than 10 times rated current, then since transformer iron core saturation makes the waveform of sample rate current be distorted, to generate
Linear distortion may cause electronic unit to the erroneous judgement of operating status, cause breaker that malfunction or tripping occurs.It is single to solve
Defect existing for current transformer, breaker of new generation use double-current mutual inductor technology, that is, have merged and taken energy for power supply
Current transformer and air core current transformer for measurement, may be implemented smaller primary current to very big short circuit current in this way
It is accurate to measure.But there is also two main problems for the energy Current Transformer that takes in double-current mutual inductor：1, electric current can be used by taking
Mutual inductor utilizes electromagnetic induction principle, and primary side high current, which is become the electronic unit that secondary side low current is breaker, powers.
Since the consumption of electronic unit is stable or is varied less, so with the increase of primary side current, what mutual inductor provided
Excess energy will be consumed by electronic unit and mutual inductor itself, and when primary side current is larger, mutual inductor will appear seriously in this way
Heating problem.2, when primary side current is larger, such as in case of a short circuit, the iron core of mutual inductor can be saturated, magnetic flux
No longer change, secondary side winding will produce the very high burst pulse voltage of amplitude at this time, and the power circuit of electronic unit is caused to take energy
Time it is very short, enough energy cannot be got, influence the power supply to electronic unit.
The excessive method of common limitation secondary side current is an air gap to be opened in iron core-closed magnetic circuit, but open air gap
Iron core-closed inductance reduce excessive, can only work under larger primary survey electric current, when primary side current is smaller, secondary side
The electric energy of offer is insufficient to allow load electronic unit normal work.A Chinese invention patent application（Application No. is
200910176191.6, applying date 2009-09-25, Publication No. CN101685725A, publication date 2010-03-31）It is public
A kind of method that limitation secondary side current is excessive is opened, the program adds the form of magnetic shunt path to shunt big electricity by transformer iron core
Magnetic flux in the case of stream, but the core configuration of above-mentioned patent is complicated, processing is relatively difficult.In addition, air gap can only limit it is single
Saturation current, and cannot be adjusted flexibly, lack versatility.
Invention content
Based on above-mentioned mutual inductor is solved the problems, such as, the present invention provides a kind of current transformer that saturation current is controllable, packets
It includes；
Annular plastics shell, for accommodating mutual inductor；
Annular is iron core-closed, is of coupled connections, is placed in the plastic casing with primary circuit；
At least one secondary coil, be wound on it is described it is iron core-closed on, have at least one on the iron core-closed lateral surface
The depth of a groove, the groove is less than the iron core-closed thickness；
It is characterized in that：The groove is two parallel grooves of the parallel iron core-closed busbar, and two parallel
Groove is connected at one end, and liquid line is provided in the groove.
According to an embodiment of the invention, the liquid line is consistent with the shape of the groove, and with the stretching plastics
The inlet and liquid outlet of hull outside.
According to an embodiment of the invention, liquid or colloid are connected with inside the liquid line.
According to an embodiment of the invention, the colloid is the oil for being evenly distributed with core material particle.
According to an embodiment of the invention, the depth of the groove is the half of the iron core-closed thickness.
The present invention also provides a kind of control methods of the saturation current of current transformer, include the following steps：
（1）The controllable current transformer of saturation current described in the claims 2 is provided；
（2）According to the size of required saturation current, the more of the concentration of specific colloid, grain density and volume are selected
It is few；
（3）It is passed through the colloid by the inlet；
（4）The liquid line is sealed, and carries out the use of mutual inductor；
（5）After use, above-mentioned colloid is released, carries out the selection of next colloid used.
Advantages of the present invention is as follows：
（1）Liquid or colloid in liquid line can take away the heat of iron core, increase the use longevity of mutual inductor or breaker
Life；
（2）On the one hand core material particle in liquid line plays heat dissipation effect, on the other hand can be in adjusting grooves
Magnetic circuit path；
（3）Number, the concentration of liquid or colloid can be controlled flexibly, more come the blocking path for controlling ferromagnetic access with this
It is few, it is possible thereby to flexibly control saturation current.
Description of the drawings
Fig. 1 is the schematic diagram of the controllable current transformer of saturation current of the present invention；
Fig. 2 is the side view of Fig. 1.
Specific implementation mode
Referring to Fig. 1 and 2, the controllable current transformer of saturation current of the invention, including；
Annular plastics shell 7, for accommodating mutual inductor；
Annular iron core-closed 1, with hollow structure 6, is of coupled connections with primary circuit, is placed in the plastic casing 7；
At least one secondary coil is wound on described iron core-closed 1, is had at least on iron core-closed 1 lateral surface
The depth D of one groove 2, the groove 2 is less than iron core-closed 1 thickness；Preferably, the depth D of the groove 2 is institute
State the half of iron core-closed thickness.
The groove 2 is two parallel grooves of the parallel iron core-closed busbar, and two parallel grooves are at one end
Connection, is provided with liquid line 3 in the groove.
The liquid line 3 is consistent with the shape of the groove, and with 4 He of inlet stretched out outside the plastic casing
Liquid outlet 5.Liquid or colloid are connected with inside the liquid line 3, the colloid is the oil for being evenly distributed with core material particle.
The present invention also provides a kind of control methods of the saturation current of current transformer, include the following steps：
（1）There is provided above-mentioned saturation current controllable current transformer；
（2）According to the size of required saturation current, the more of the concentration of specific colloid, grain density and volume are selected
It is few；
（3）It is passed through the colloid by the inlet；
（4）The liquid line is sealed, and carries out the use of mutual inductor；
（5）After use, above-mentioned colloid is released, carries out the selection of next colloid used.
Finally it should be noted that：Obviously, the above embodiment is merely an example for clearly illustrating the present invention, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the art, it can also do on the basis of the above description
Go out other various forms of variations or variation.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn
The obvious changes or variations that Shen goes out are still in the protection scope of this invention.
Claims (4)
1. a kind of current transformer that saturation current is controllable, including；
Annular plastics shell, for accommodating mutual inductor；
Annular is iron core-closed, is of coupled connections, is placed in the plastic casing with primary circuit；
At least one secondary coil, be wound on it is described it is iron core-closed on, have on the iron core-closed lateral surface at least one recessed
The depth of slot, the groove is less than the iron core-closed thickness；
It is characterized in that：The groove is two parallel grooves of the parallel iron core-closed busbar, and two parallel grooves
It is connected at one end, liquid line is provided in the groove, colloid is connected with inside the liquid line, the colloid is to be uniformly distributed
The oil of cored material granule.
2. the controllable current transformer of saturation current according to claim 1, it is characterised in that：The liquid line with it is described
The shape of groove is consistent, and with the inlet and liquid outlet stretched out outside the plastic casing.
3. according to the controllable current transformer of the saturation current described in claim 1, it is characterised in that：The depth of the groove
For the half of the iron core-closed thickness.
4. a kind of control method of the saturation current of current transformer, includes the following steps：
（1）The controllable current transformer of saturation current described in the claims 2 is provided；
（2）According to the size of required saturation current, the concentration of specific colloid, the number of grain density and volume selected；
（3）It is passed through the colloid by the inlet；
（4）The liquid line is sealed, and carries out the use of mutual inductor；
（5）After use, above-mentioned colloid is released, carries out the selection of next colloid used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710110303.2A CN106910600B (en) | 2017-02-28 | 2017-02-28 | A kind of current transformer that saturation current is controllable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710110303.2A CN106910600B (en) | 2017-02-28 | 2017-02-28 | A kind of current transformer that saturation current is controllable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106910600A CN106910600A (en) | 2017-06-30 |
| CN106910600B true CN106910600B (en) | 2018-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710110303.2A Active CN106910600B (en) | 2017-02-28 | 2017-02-28 | A kind of current transformer that saturation current is controllable |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6320490B1 (en) * | 1999-08-13 | 2001-11-20 | Space Systems/Loral, Inc. | Integrated planar transformer and inductor assembly |
| CN2686057Y (en) * | 2004-03-15 | 2005-03-16 | 鈤新科技股份有限公司 | Transformer with radiating device |
| CN205282238U (en) * | 2016-01-14 | 2016-06-01 | 乐清市上铁冲压件有限公司 | Transformer core |
-
2017
- 2017-02-28 CN CN201710110303.2A patent/CN106910600B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6320490B1 (en) * | 1999-08-13 | 2001-11-20 | Space Systems/Loral, Inc. | Integrated planar transformer and inductor assembly |
| CN2686057Y (en) * | 2004-03-15 | 2005-03-16 | 鈤新科技股份有限公司 | Transformer with radiating device |
| CN205282238U (en) * | 2016-01-14 | 2016-06-01 | 乐清市上铁冲压件有限公司 | Transformer core |
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| Publication number | Publication date |
|---|---|
| CN106910600A (en) | 2017-06-30 |
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Denomination of invention: A current transformer with controllable saturation current Effective date of registration: 20220127 Granted publication date: 20180821 Pledgee: Nantong Hexin technology microfinance Co.,Ltd. Pledgor: NANTONG YIXUAN INDUSTRIAL DESIGN Co.,Ltd. Registration number: Y2022320010054 |