CN202067660U - Clamping type direct current transformer - Google Patents
Clamping type direct current transformer Download PDFInfo
- Publication number
- CN202067660U CN202067660U CN2011201843389U CN201120184338U CN202067660U CN 202067660 U CN202067660 U CN 202067660U CN 2011201843389 U CN2011201843389 U CN 2011201843389U CN 201120184338 U CN201120184338 U CN 201120184338U CN 202067660 U CN202067660 U CN 202067660U
- Authority
- CN
- China
- Prior art keywords
- current transformer
- direct current
- magnet ring
- plug
- lower casing
- 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.)
- Expired - Fee Related
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Abstract
A clamping type direct current transformer is characterized in that the clamping type direct current transformer comprises an outer shell which is made of an insulating material and provided with a center through hole used for installing an alternating current wire cable in a penetrating way; the outer shell is formed by oppositely buckling an upper shell and a lower shell; a C-shaped magnetic ring is packaged in the upper shell and the lower shell respectively; an input winding and an output winding are sequentially wound on one of the two C-shaped magnetic rings; and the two ends of each winding are respectively connected with corresponding input weld legs and output weld legs arranged on the shell.
Description
Technical field
The utility model relates to electronic applications, particularly a kind of plug-in DC current transformer that is adapted to power industry automation control.
Background technology
As everyone knows, because direct current does not produce alternating electric field, so direct current can't obtain transformation or mutual inductance by coupling.Previous direct current sampling is to be serially connected in direct current with in the loop of electric line with one " direct current shunt ", this shunt is actual to be one " shunt resistance row ", and the pressure drop that this shunt resistance row produces thereon of flowing through characterizes the sampling of line current as direct current by the direct current supply electric current.Therefore, previous direct current shunt disconnects serial connection with the direct current cable earlier in advance and goes into this " direct current shunt " when packing into, finishes the equipment wiring then.This direct current shunt not only produces the electricity consumption line drop and causes the waste of extra direct current power, returns installment work and overhauls and the later stage adds and joins the direct current shunt and brought inconvenience afterwards, has restricted the scope of its use.
Summary of the invention
A kind of plug-in DC current transformer that the utility model proposes at existing weak point in the above-mentioned prior art just.This plug-in DC current transformer is not needing to disconnect under the situation of low-voltage power line cable, and directly card is placed on the direct current cable, inserts the later stage and has finished in the power distribution cabinet or other electric equipments of tie lines, finishes the sampling work of line related direct current easily.
The purpose of this utility model can realize by following technique measures:
Plug-in DC current transformer of the present utility model comprises the shell body that is used to install the central through hole (clamping window) that exchanges cable that is provided with that adopts insulating material to make to form, described shell body is fastened relatively by upper and lower casing and forms, in described upper and lower casing, respectively be packaged with a C type magnet ring, be wound with successively on the C type magnet ring in described two C type magnet rings two different numbers of turn input, output winding, and the two ends of each winding respectively be arranged on its housing on corresponding input, output leg be connected.
The U-shaped elasticity that is provided with the overhead kick structure by the end between upper and lower casing described in the utility model just card and the corresponding connecting hole processed respectively on upper and lower casing is consolidated, described C type magnet ring is the magnet ring that contains beryllium Mo alloy material, and its operating frequency should be at 50Hz ~ 200KHz; And adopt insulating cement to be bonded in and adopt in the injection molded housing of polyethylene synthesis material.
Input described in the utility model, output leg adopt the copper rivet riveting to go into corresponding housing end face.
Operation principle of the present utility model is as follows:
Can be separately separately or be combined into one by processing the firm card of U-shaped elasticity that corresponding connecting hole on upper and lower casing and end be provided with the overhead kick structure respectively with upper and lower casing.During installation, after separately correspondence is stuck in the appropriate location of direct current cable separately with upper and lower casing, crosses connecting hole with the firm cartoon of U-shaped elasticity both are combined as a whole, and be fixed on the cable.Right hand theorem according to the electromagnetism electromagnetic induction, when cable direct current process central through hole (clamping window), promptly also pass C type magnet ring, on the window internal magnetic ring, produce static magnetic field, this influence of magnetic field the density of line of magnetic force in the magnet ring, the rising of direct current intensity or decline, magnetic field intensity is with regard to corresponding rising or decline, cause magnet ring magnetic flux to rise or descend and arrive and make magnet ring equivalence permeability rise or descend, utilize two windings to be wrapped in " on unique common magnetic core " that same permeability rises or descends, the variation of permeability Sui direct current has just influenced the magnetic coupling degree of two windings, if from a winding A, B two ends input 10KHz alternation square wave current, just from another winding C, the D end is sensed rising or the decline with the rising of direct current intensity or the corresponding 10KHz alternation square wave electromotive force that descends, thereby reaches from C, the output of D two-end-point characterizes the purpose of direct current sampled signal.
The beneficial effects of the utility model are as follows:
Plug-in DC current transformer of the present utility model is under the condition that need not disconnect cable, can be connected to whenever and wherever possible on the electric power cable by direct current, can be after finishing the equipment wiring, the instrument transformer of packing at last, its optimum is becoming the low-voltage distribution of dress at any time line related to be carried out direct current detection cashier's office in a shop, can not construct under the striping cable condition fully to becoming installing.
Description of drawings
Fig. 1 is a structure principle chart of the present utility model.
Fig. 2 is two C type magnet ring structure charts among Fig. 1.
Embodiment
The utility model is further described below with reference to embodiment (accompanying drawing):
As Fig. 1, shown in Figure 2, plug-in DC current transformer of the present utility model comprises that being provided with of adopting insulating material to make to form is used to install the central through hole 2(clamping window that exchanges cable) shell body, described shell body is by last, lower house 1-1,1-2 fastens relatively and forms, on described, lower house body 1-1, respectively be packaged with a C type magnet ring 7 in the 1-2,8, be wound with the output of two different numbers of turn on the C type magnet ring 8 in described two C type magnet rings successively, input winding, and four output terminals A of two windings, B, C, D respectively with the corresponding output that is arranged on its housing, input leg 5,6 connect; The U-shaped elasticity that is provided with the overhead kick structure by the end between described upper and lower casing just card 4 and the corresponding connecting hole 3 processed respectively on upper and lower casing is consolidated.Described output, input leg 5,6 adopt the copper rivet riveting to go into corresponding housing end face.
The type of C described in the utility model magnet ring 7,8 is for containing the magnet ring of beryllium Mo alloy material, adopt insulating cement to be bonded in and adopt in the injection molded housing of polyethylene synthesis material (for reducing the loop magnetic resistance, noticing that two magnet rings will be is symmetrical arranged), its operating frequency should be at 50Hz ~ 200KHz, and the cross-sectional diameter inspection test cross stream size of current of C type semicircle magnet ring is calculated; Output winding 9, input winding 10 adopt enamel covered wires to look different sampling parameters different numbers of turn on C type magnet ring twines down and form two coils and account for insulating varnish and handle, the sampling amplifier that every group of number of turn also depends on thereafter to be connect, the amplifier front end should connect a potentiometer and regulate better; The enamelled wire diameter is selected 0.25mm high-strength insulation line generally speaking for use.
During the injection moulding of the body and function of upper and lower shell described in the utility model polyethylene synthesis material, add curing agent in right amount, promptly keep its toughness to keep it that certain rigidity is arranged again, environment ftractures down with preventing to dislike slightly with the prolongation aging period.Output, input leg 5,6 copper rivets should be gone in the zinc-plated riveting then of two ends in advance.
Claims (4)
1. plug-in DC current transformer, it is characterized in that: it comprises the shell body that is used to install the central through hole that exchanges cable that is provided with that adopts insulating material to make to form, described shell body is fastened relatively by upper and lower casing and forms, in described upper and lower casing, respectively be packaged with a C type magnet ring, be wound with successively on the C type magnet ring in described two C type magnet rings input, output two windings, and the two ends of each winding respectively be arranged on its housing on corresponding input, output leg be connected.
2. plug-in DC current transformer according to claim 1 is characterized in that: the U-shaped elasticity that is provided with the overhead kick structure by the end between described upper and lower casing just card and the corresponding connecting hole processed respectively on upper and lower casing is consolidated.
3. plug-in DC current transformer according to claim 1 is characterized in that: described C type magnet ring is the magnet ring that contains beryllium Mo alloy material, and its operating frequency should be at 50Hz ~ 200KHz; And adopt insulating cement to be bonded in and adopt in the injection molded housing of polyethylene synthesis material.
4. plug-in DC current transformer according to claim 1 is characterized in that: described input, output leg adopt the copper rivet riveting to go into corresponding housing end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201843389U CN202067660U (en) | 2011-06-02 | 2011-06-02 | Clamping type direct current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201843389U CN202067660U (en) | 2011-06-02 | 2011-06-02 | Clamping type direct current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202067660U true CN202067660U (en) | 2011-12-07 |
Family
ID=45061517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201843389U Expired - Fee Related CN202067660U (en) | 2011-06-02 | 2011-06-02 | Clamping type direct current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202067660U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064328A (en) * | 2014-06-24 | 2014-09-24 | 无锡市崇安区科技创业服务中心 | Magnet ring insulation sleeve |
| CN108231385A (en) * | 2018-03-22 | 2018-06-29 | 国家海洋技术中心 | The ocean inductively underwater magnet ring of data transmission |
| CN112129986A (en) * | 2020-08-10 | 2020-12-25 | 常州博瑞电力自动化设备有限公司 | Optical current transformer for high-voltage direct-current circuit breaker |
-
2011
- 2011-06-02 CN CN2011201843389U patent/CN202067660U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064328A (en) * | 2014-06-24 | 2014-09-24 | 无锡市崇安区科技创业服务中心 | Magnet ring insulation sleeve |
| CN108231385A (en) * | 2018-03-22 | 2018-06-29 | 国家海洋技术中心 | The ocean inductively underwater magnet ring of data transmission |
| CN112129986A (en) * | 2020-08-10 | 2020-12-25 | 常州博瑞电力自动化设备有限公司 | Optical current transformer for high-voltage direct-current circuit breaker |
| CN112129986B (en) * | 2020-08-10 | 2024-04-09 | 常州博瑞电力自动化设备有限公司 | Optical current transformer for high-voltage direct-current circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 Termination date: 20140602 |