CN106098354B - Single-turn transformer and its first winding and first winding manufacturing method - Google Patents
Single-turn transformer and its first winding and first winding manufacturing method Download PDFInfo
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- CN106098354B CN106098354B CN201610713433.0A CN201610713433A CN106098354B CN 106098354 B CN106098354 B CN 106098354B CN 201610713433 A CN201610713433 A CN 201610713433A CN 106098354 B CN106098354 B CN 106098354B
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- connecting plate
- terminal
- winding
- primary conductor
- flat segments
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
-
- 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
- H01F27/2847—Sheets; Strips
- H01F27/2852—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
- H01F27/292—Surface mounted devices
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The present invention relates to single-turn transformer and its first windings and first winding manufacturing method, to solve the problems, such as the manufacturing cost occurred in the manufacture of first winding in the prior art height, waste of material.Primary Conductor of the invention is formed by band-like conductor coiling, so the waste of material can be avoided so that the sectional area of Primary Conductor can flexibly change with through-flow value is designed according to the through-flow coiling number of plies for being worth selected tape conductor of design of Primary Conductor.
Description
Technical field
The present invention relates to single-turn transformer and its first windings and first winding manufacturing method.
Background technique
Current transformer, as one of matched critical elements of electrical equipment, mainly to measuring instrument, instrument or protection dress
Set transmitting information.Specifically the first winding of current transformer is connect with electrical equipment, by the secondary winding of current transformer
It is connect with measuring cell, to realize the purpose of extension measuring cell range.
Single-turn transformer is to refer to the current transformer for there was only a circle coil in first winding, single in the prior art
The first winding structure of circle formula current transformer is as shown in Figure 1, include a terminal 2 and the conducting rod 1 as Primary Conductor.One
Secondary terminal is manufactured using casting and molding method, and the casting processing period is long, process costs are high, operating process is more dangerous, also
Can have an adverse effect to surrounding enviroment.Meanwhile 2 hardness of terminal casting processing is small, seamed edge is more, not easy to be processed, so
After it is welded with conducting rod 1, the quality of commissure is difficult to ensure, this temperature rise that will result in finished product current transformer is not met
Design requirement and cannot come into operation.And conducting rod 1 generally selects the standard component of outsourcing, it is raw since the specification of standard component is limited
Producing enterprise is to reduce inventory, and under the premise of guaranteeing product quality, conducting rod 1 within the scope of certain specification all can be according to can expire
The cross-sectional area of the conducting rod of sufficient maximum current circulation demand is purchased, this has resulted in the waste of material.
Summary of the invention
The purpose of the present invention is to provide a kind of manufacturing methods of single-turn transformer first winding, existing to solve
There is the problem of high manufacturing cost occurred in the manufacture of first winding in technology, waste of material；The present invention also aims to mention
For the first winding and single-turn transformer for using above-mentioned manufacturing method to manufacture.
To achieve the above object, the technical solution of single-turn transformer of the invention first winding manufacturing method
It is:
Single-turn transformer first winding manufacturing method, includes the following steps, the first step, processes a terminal；
Second step carries out coiling to band-like conductor and processes Primary Conductor；Third step, by a terminal and the fixed company of Primary Conductor
It is connected in one；4th step processes bus mounting hole on a terminal.
In the first step, a terminal is processed using extrinsion pressing.
The technical solution of single-turn transformer of the invention first winding is:
Single-turn transformer first winding including a terminal and is fixedly connected on the one of a terminal lower end
Partial conductor, the Primary Conductor include the tape conductor of more arranged stackeds.
Further, every tape conductor is bent into U-shaped and forms Primary Conductor and mutually fit with the shape of tape conductor
Match, upper end has the U-shaped part of opening.
Further, the left and right ends of U-shaped part opening are equipped in left-right direction towards the straight of opening center extension
Section, the upper side of flat segments with the lower end surface of a terminal for being fixedly connected.
As the optimization to either a program in three above scheme, through-hole up and down is offered on a terminal, is led to
It is fixedly installed inserts in hole, the tapped blind hole that axis vertically extends is offered on inserts, the upper end of tapped blind hole is opened
Mouth, lower end closed.
Further, a terminal includes horizontally disposed bus connecting plate and is vertically arranged at below bus connecting plate
Primary Conductor connecting plate, the through-hole are arranged on bus connecting plate.
Further, the lower end of the inserts is located under the lower end surface of bus connecting plate.
Single-turn transformer of the invention uses following technical scheme:
Single-turn transformer, including first winding, first winding is including a terminal and is fixedly connected on primary end
The Primary Conductor of sub- lower end, the Primary Conductor include the tape conductor of more arranged stackeds.
Further, every tape conductor is bent into U-shaped and forms Primary Conductor and mutually fit with the shape of tape conductor
Match, upper end has the U-shaped part of opening.
Further, the left and right ends of U-shaped part opening are equipped in left-right direction towards the straight of opening center extension
Section, the upper side of flat segments with the lower end surface of a terminal for being fixedly connected.
As the optimization to either a program in three above scheme, through-hole up and down is offered on a terminal, is led to
It is fixedly installed inserts in hole, the tapped blind hole that axis vertically extends is offered on inserts, the upper end of tapped blind hole is opened
Mouth, lower end closed.
Further, a terminal includes horizontally disposed bus connecting plate and is vertically arranged at below bus connecting plate
Primary Conductor connecting plate, the through-hole are arranged on bus connecting plate.
Further, the lower end of the inserts is located under the lower end surface of bus connecting plate.
The beneficial effects of the present invention are: Primary Conductor of the invention is formed by band-like conductor coiling, so can be according to one
The coiling number of plies for being worth selected tape conductor that the design of partial conductor is through-flow so that the sectional area of Primary Conductor can with designing through-flow value and
Flexibly variation, avoids the waste of material.
Further, a terminal extrusion forming of the invention, extrusion forming is not only at low cost, high-efficient, even more can
The hardness of a terminal after raising makes a terminal have excellent switching performance and machinability.It simultaneously can also be according to one
The through-flow value of design of secondary terminal is adjusted compression tool so that the sectional area of a terminal can be flexible with through-flow value is designed
Variation.
Detailed description of the invention
Fig. 1 is the cut-away view of first winding in the prior art；
Fig. 2 is the structural schematic diagram of one embodiment of first winding of the invention；
Fig. 3 is the structural schematic diagram of one embodiment of single-turn transformer of the invention；
Fig. 4 is the cross-sectional view of a terminal and inserts junction in Fig. 2；
Fig. 5 is the cross-sectional view of a terminal in Fig. 2；
Fig. 6 is the cross-sectional view of inserts in Fig. 2.
In figure: 1, conducting rod；2, a terminal；3, Primary Conductor；4, inserts；5, secondary coil.
Specific embodiment
Embodiments of the present invention are described further with reference to the accompanying drawing.
The specific embodiment of single-turn transformer of the invention as shown in Figures 2 to 6, including is existed by epoxy resin
The casting insulated body 6 of moulding by casting in mold is provided with first winding and three secondary coils 5 in casting insulated body 6.Once around
Group includes a terminal 2 and the Primary Conductor 3 being connected with a terminal 2, inserts 4, and Primary Conductor 3 passes through three secondary coils
5, three secondary coils 5 pass through the outside outlet of secondary wiring 7.
Terminal 2 is the identical connecting lever plate of thickness in the longitudinal direction, by conductive material through compression tool extrusion forming.
It specifically includes the bus connecting plate 21 extended in left-right direction on top and is vertically arranged in the primary of bus connecting plate lower left side
Conductor connecting plate 22 offers through-hole on bus connecting plate 21, and the top interference of inserts 4 is plugged in through-hole and makes inserts 4
Exposed by the lower surface of bus connecting plate 21 lower part.Through-hole include from top to bottom aperture section flaring cone section, aperture section, big hole section and
Big hole section flaring cone section, the aperture of big hole section and the upper diameter of inserts 4 meet elastic conjunction relationship, and the bottom hole of big hole section is used for
The depth that upper surface block cooperation with inserts 4 thinks that inserts 4 is fitted into a terminal 2 is limited.
The convex edge 42 of the annular of evagination is offered in the middle part of the outer peripheral surface of inserts 4, the upper surface of convex edge 42 is and aperture section
The conical surface of the taper adaptation of flaring cone section, so after the upper surface of inserts 4 and the bottom hole of big hole section contact block cooperation, convex edge
42 upper surface can block in the flaring cone section of the aperture section in the through-hole on bus connecting plate 21 to avoid liquid in casting process
The epoxy resin of state enters the junction of through-hole and inserts.The tapped blind hole 41 vertically extended is offered in the middle part of inserts 4,
The opening upwards of tapped blind hole 41.Tapped blind hole 41 is passed through for bolt the busbar connector for being used to connect bus is pressed abd fixed on mother
On 21 upper surface of line connecting plate, thus tapped blind hole 41 is used as the bus connecting hole for connecting bus.Compared to
The form of threaded hole up and down is directly opened up on bus connecting plate 21, the setting of inserts 4 is avoided to casting insulated
During 6 moulding by casting of body epoxy resin enter in threaded hole and caused by installation silk entanglement, and the busbar connector therefore caused
Junction that is low with the bonding strength of bus connecting plate 21 and making the two generates gap and corresponding resistance increases phenomenon.Meanwhile
The setting form that the lower end surface of bus connecting plate 21 is stretched out in the lower part of inserts 4 is female in the case where not increasing bus connection plate thickness
The length of thread segment is expanded in line connecting hole 23.
In other embodiments, in the enough situations of thickness of bus connecting plate, the lower end surface of inserts can also be with mother
The lower end of line connecting plate flushes setting；It is, of course, also possible to save inserts but directly opened up on bus connecting plate upper end opening,
The tapped blind hole of lower end closed.
Primary Conductor 3 is C-shaped on perspective plane along the longitudinal direction, turns to the U that upper end has opening by more bendings
The stacking split of type soft copper band is formed, and is specifically included the U-shaped main body 31 of upper end opening and is set to the upper end opening two of U-shaped main body 31
Left flat segments 32, the right flat segments 33 at end.The extending direction of left and right flat segments is in other words left flat towards the center of opening
Straight section 32 extends horizontally to the right, and right flat segments 33 are horizontal to be extended to the left.The lower end surface of terminal 2 using gas welding be fixed on it is left,
On the upper side of right flat segments.Primary Conductor 3 is formed by soft copper band coiling, so can be selected according to the through-flow value of design of Primary Conductor
Determine the coiling number of plies of soft copper band, so that the sectional area of Primary Conductor 3 can flexibly change with through-flow value is designed, avoids material
Waste.In other embodiments, the flat segments at 3 both ends of Primary Conductor may be omitted with, but by the two of U-shaped Primary Conductor
End is directly weldingly fixed on the lower end surface of a terminal；Certainly, soft copper band can also bend to turn to and linear once lead
Body needs the extended length by the Primary Conductor connecting plate on a terminal only at this time to meet the overall dimensions need of first winding
It asks.
The terminal hardness that a terminal 2 after extrusion forming is obtained compared with casting is greatly improved, thus has
There is excellent machinability, smooth lower end surface can be obtained after cutting.And Primary Conductor made of soft copper band just has itself
There is smooth outer surface, so being easier to after the upper side of flat segments is welded to connect in the lower end of a terminal 2 and Primary Conductor 3
Guarantee junction seamless connectivity, avoid junction with gap and therefore caused by first winding it is easy in use
The generation of heating problem.
The manufacturing method of current transformer of the invention is as follows: first manufacturing first winding and secondary coil respectively, then by one
Secondary winding, secondary coil 5 and secondary wiring 7 are put into mold by setting position and the casting epoxy resin into mold, asphalt mixtures modified by epoxy resin
Rouge completes the manufacture to current transformer after solidifying.
The manufacturing method of first winding is as follows: the first step, is squeezed a terminal on compression tool using conductive material
Molding；Second step selects suitable soft copper band blanking by technical requirements and size of current, technical requirements ruler is pressed on Special mould
It is very little that coiling is carried out to Primary Conductor, it after coiling, places it in dedicated tooling and is corrected, to avoid first winding work
There is point discharge phenomenon during part, the extra soft copper band in both ends is cut so that the end face of Primary Conductor is concordant；Third step,
Primary Conductor and a terminal are welded and fixed；4th step cuts a terminal, connects in the bus of a terminal
Through-hole up and down is processed on fishplate bar and installs the inserts for offering tapped blind hole in through-holes.In other embodiments, exist
In the case where can guaranteeing work piece surface accuracy, one time terminal can also be added with casting and forming or using other machine-tooled methods
Work molding.
The manufacture of secondary coil 5 is also first to carry out coiling using Special mould, then correct on special tooling.Certainly, it is
Shorten the manufacturing cycle of current transformer, the blanking of Primary Conductor can also be carried out while carrying out coiling to secondary coil 5
Preparation.
The embodiment of single-turn transformer first winding of the invention: the structure and list of first winding of the invention
The specific structure of first winding is identical in the specific embodiment of circle formula current transformer, is no longer described in detail.
The embodiment of single-turn transformer of the invention first winding manufacturing method: first winding of the invention
Manufacturing method is identical as the manufacturing method of first winding in the specific embodiment of single-turn transformer, is no longer described in detail.
Claims (7)
1. single-turn transformer first winding manufacturing method, it is characterised in that: include the following steps, the first step, process
Terminal, a terminal includes the bus connecting plate extended in left-right direction on top and to be vertically arranged in bus connecting plate left
The Primary Conductor connecting plate of downside or lower right side；Second step carries out coiling to band-like conductor and processes Primary Conductor, and one
Partial conductor is C-shaped on perspective plane along the longitudinal direction, and turning to upper end by more bendings, there is the U-shaped soft copper band of opening to be laminated
Split is formed, and is specifically included the U-shaped main body of upper end opening and is set to the left flat segments at the upper end opening both ends of U-shaped main body, the right side
Flat segments, the extending direction of left and right flat segments is towards the center of opening；Third step fixes a terminal with Primary Conductor
It is connected as one, Primary Conductor connecting plate is fixedly connected with the upper side of left and right flat segments；4th step adds on a terminal
Work bus mounting hole.
2. single-turn transformer according to claim 1 first winding manufacturing method, it is characterised in that: described
In the first step, a terminal is processed using extrinsion pressing.
3. single-turn transformer first winding including a terminal and is fixedly connected on once leading for a terminal lower end
Body, it is characterised in that: the Primary Conductor includes the tape conductor of more arranged stackeds, and Primary Conductor is in throwing along the longitudinal direction
C-shaped on shadow face, turning to upper end by more bendings, there is the U-shaped soft copper band stacking split of opening to be formed, and specifically include upper end
The U-shaped main body of opening and be set to U-shaped main body upper end opening both ends left flat segments, right flat segments, left and right flat segments prolong
Direction is stretched towards the center of opening, and a terminal includes the bus connecting plate extended in left-right direction on top and is vertically arranged
Primary Conductor connecting plate in bus connecting plate lower left side or lower right side, Primary Conductor connecting plate are upper with left and right flat segments
Side is fixedly connected.
4. single-turn transformer first winding according to claim 3, it is characterised in that: opened up on a terminal
There is through-hole up and down, inserts is fixedly installed in through-hole, it is blind that the screw thread that axis vertically extends is offered on inserts
Hole, upper end opening, the lower end closed of tapped blind hole.
5. single-turn transformer first winding according to claim 4, it is characterised in that: the through-hole setting exists
On bus connecting plate.
6. single-turn transformer first winding according to claim 5, it is characterised in that: the lower end of the inserts
Under the lower end surface of bus connecting plate.
7. single-turn transformer, it is characterised in that: including single-turn type Current Mutual Inductance described in any one of claim 3 ~ 6
Device first winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610713433.0A CN106098354B (en) | 2016-08-24 | 2016-08-24 | Single-turn transformer and its first winding and first winding manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610713433.0A CN106098354B (en) | 2016-08-24 | 2016-08-24 | Single-turn transformer and its first winding and first winding manufacturing method |
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| Publication Number | Publication Date |
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| CN106098354A CN106098354A (en) | 2016-11-09 |
| CN106098354B true CN106098354B (en) | 2019-01-04 |
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| CN201610713433.0A Active CN106098354B (en) | 2016-08-24 | 2016-08-24 | Single-turn transformer and its first winding and first winding manufacturing method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113593843B (en) * | 2021-07-13 | 2024-05-03 | 三积瑞科技（苏州）有限公司 | Ultra-low-resistance hot-pressing non-coupling double inductor and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2541936Y (en) * | 2002-04-23 | 2003-03-26 | 方静 | Dry high voltaeg current transformer |
| JP2004319663A (en) * | 2003-04-15 | 2004-11-11 | Sht Corp Ltd | Current transformer |
| CN201256074Y (en) * | 2008-07-12 | 2009-06-10 | 厦门大一互科技有限公司 | Primary winding connecting terminal component for current transducer |
| CN201294159Y (en) * | 2008-11-05 | 2009-08-19 | 南通海立电子有限公司 | Aluminum electrolytic capacitor terminal |
| CN102468046A (en) * | 2010-11-15 | 2012-05-23 | 大连华亿电力电器有限公司 | Small-size current transformer |
| CN202307496U (en) * | 2011-10-20 | 2012-07-04 | 镇江市丹高电器有限公司 | Electronic high-voltage current transformer |
| CN104992828B (en) * | 2015-08-06 | 2017-04-12 | 河南森源电气股份有限公司 | Low-partial-discharge-value single-structure-based mutual inductor and manufacturing method thereof |
| CN205282252U (en) * | 2015-12-16 | 2016-06-01 | 东莞市昱懋纳米科技有限公司 | Filtering electrical sensor |
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| CN106098354A (en) | 2016-11-09 |
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