CN206059104U - Magnetic core and current transformer - Google Patents

Abstract

This utility model is related to a kind of magnetic core and current transformer.Wherein, a kind of magnetic core, is " H " shape, including center pillar and the blade for being symmetrically connected to center pillar two ends, two blades are respectively the first blade and the second blade, and blade is square, including medial surface, lateral surface, top surface, bottom surface, front end face and rear end face, two base angle plating of blade are terminal supportor pad；Electrodeposited coating is provided with around center pillar on the medial surface of the first blade, electrodeposited coating is non-closed, the disconnection mouth of electrodeposited coating is located between two terminal supportors, forms a plating coil for surrounding center pillar and non-closed.Compared with prior art, the component of this utility model current transformer seldom, can reduce manufacturing complexity to greatest extent.Specific armature winding is just formed in magnetic core manufacture processing, the artificial participation of rear end can be reduced.And efficiently solve the problems, such as current transformer flatness in prior art.

Description

Magnetic core and current transformer

Technical field

This utility model is related to a kind of apply to high frequency switch power and the magnetic core in modular power source and inductive type electric current is mutual Sensor.

Background technology

Be frequently utilized that in high frequency switch power and modular power source current transformer carry out sample detecting input, in output circuit Electric current, realizes circuit control or protection.Existing current transformer, refering to Fig. 1, Fig. 2, generally by EE magnetic cores 1, skeleton 6, coil 3rd, metallic laminas 4 are combined.Metallic laminas 4 are set to armature winding, and primary side is that the enamel wire coil 3 of many number of turns is constituted and line Enclose take-up to be wound on the terminal 5 of skeleton 6 respectively, serve as armature winding using metallic laminas 4, then carry out magnetic core 1 again Assembling, meets high current requirement, is usable in middle large-power occasions.Updating and optimize with magnetic device components and parts industry Under, a kind of new transformer is also occurred in that, i.e., metallic laminas is embedded in skeletal internal just in skeleton forming, is thereby reduced The component and assembling procedure of transformer, reduces manufacturing operation difficulty, realizes the miniaturization of current transformer.

But, above-mentioned frame combined type current transformer, structure and manufacturing process all seem more complicated, not only need Multiple components, in addition it is also necessary to the manufacturing process such as such as coiling through a sequence, reason line, wicking, assembling, bonding, in addition it is also necessary to by being Being processed production, overall production efficiency is relatively low for the auxiliary clamping apparatus of row.Metallic laminas are matched somebody with somebody with the assembling of frame body simultaneously Can also there is the overall coplane degree of current transformer in conjunction.With reference to the Application No. that 2014.02.12 is announced 201310368399.4 patent of invention " a kind of for make fixture of current transformer and preparation method thereof ", the patent is exactly In order to solve the manufacturing issue of this transformer, carry out aiding in the innovation optimization of clamping apparatus.

In recent years, while with the disappearance of demographic dividend, the manufacturing cost of current transformer gradually increases.Therefore, how The component of current transformer is reduced, reduces manufacturing difficulty, reduce the artificial operation for participating in, so as to reduce the manufacture of transformer Cost, is the technical barrier of art personnel urgent need solution.

Utility model content

In view of problem above, the purpose of this utility model is to provide a kind of few component, low cost, process is simple, automatically The high current transformer magnetic core of change degree.

It is corresponding to this, another purpose of the present utility model be provide a kind of few component, low cost, process is simple, from The high current transformer of dynamicization degree.

To realize object above, it is as follows that this utility model provides technical scheme：

A kind of magnetic core, is " H " shape, including center pillar and is symmetrically connected to the blade at center pillar two ends, and two blades are respectively first Blade and the second blade, blade for square, including medial surface, lateral surface, top surface, bottom surface, front end face and rear end face, the two of blade Individual base angle plating is terminal supportor pad；Electrodeposited coating is provided with around center pillar on the medial surface of the first blade, electrodeposited coating is non-closed, The disconnection mouth of electrodeposited coating is located between two terminal supportors, forms a plating coil for surrounding center pillar and non-closed.

Preferably, on the blade, the disconnected aperture position of the first blade electrodeposited coating of correspondence offers downward opening groove, The two side of groove forms two terminal supportors.

Preferably, the groove is " ∩ " shape groove, and the two side of groove forms two terminal supportors.

Preferably, the electrodeposited coating of first blade, it is " ∩ " shape which disconnects mouth, is formed by the center of circle of center pillar and surrounds center pillar And band " ∩ " shape disconnects the plating coil of mouth.

Preferably, the groove top of the groove is linked to be the groove top of a plane, i.e. groove and the bottom of center pillar with the bottom surface of center pillar Face is coplanar.

Preferably, the groove width of the groove is 0.5 millimeter to 2 millimeters.

Preferably, the electrodeposited coating of first blade, also extends on the front end face and rear end face of the first blade.

Preferably, the thickness of first blade is more thick than the second blade.

This utility model also provides a kind of current transformer, including the first winding and the second winding, by above-mentioned magnetic core, lid Plate and coiled wire-wound coil composition, coiled wire-wound coil is wound on the center pillar of magnetic core, cover plate by being adhesively fixed on the top surface of magnetic core, its In, the plating coil of the first blade of magnetic core is the first winding, and the terminal supportor of the first blade is the leading-out terminal of the first winding；Magnetic In the heart the coiled wire-wound coil on post be the second winding, coiled wire-wound coil rise, take-up end be separately fixed on the terminal supportor of the second blade, The terminal supportor of the second blade is the leading-out terminal of the second winding.

Preferably, the cover plate, in the form of sheets, thickness is suitable with the first blade of magnetic core, all including top surface, bottom surface and four Face, the bottom surface of cover plate offer deep gouge at the position corresponding with the top surface of the first blade of magnetic core and the second blade；Magnetic core Top surface offers the position that is adhesively fixed of recess, magnetic core and cover plate at the position corresponding with the heavy groove sidewall of cover plate in recess With the contact surface of heavy groove sidewall.

A kind of inductive type current transformer, is made up of magnetic core, coil, cover plate.Characterized in that, magnetic core is by center pillar and is located at Unequal two blade in section of center pillar end face is constituted, and there is electroplated coating shape the medial wall of the relatively large blade in its middle section Into transformer primary winding；Coil is uniformly wound on magnetic core middle post by plain conductor of the outer layer with insulating barrier, is welded with magnetic core Foot connects the secondary windings to form transformer；Cover plate has the magnetic material of certain pcrmeability the blade contact group with magnetic core Dress, center pillar, blade, cover plate three form a closed magnetic circuit after assembling.

Preferably, magnetic core is that the materials processing with certain permeability is formed, and magnetic core middle post is Cylindrical Homogeneous body, center pillar The each end face in two ends extends towards setting blade, and blade is extended around and perpendicular to magnetic core middle post, leaf with center pillar as axle center end face is past Piece top edge leaves notch, and lower limb is provided with groove, and the side wall of groove forms terminal supportor, the coplane degree one of all terminal supportors Cause.One blade is provided with a uniformly-coating coil on the side wall around the periphery of magnetic core middle post, electroplates the whole story end difference of coil It is integrally connected with leg conducting.

Preferably, coil is uniformly wound on magnetic core middle post by plain conductor of the outer layer with insulating barrier, the initial line of coil It is separately fixed on the leg of another blade with take-up.

Preferably, cover plate is by forming for the synthetic material compacting sintering with certain permeability such as ferrite, alloy, powder core Plates.Plates upper surface is smooth and one jiao on the face identification point for being provided with location discrimination.The edge of plates There is local hollow out perpendicular to plates edge and boss, the location and shape of each boss and the leaf of magnetic core are formed in edge corner Piece top edge notch matching correspondence.

Compared with prior art, this utility model has the advantages that：

1st, the component of inductive type current transformer seldom, can reduce manufacturing complexity to greatest extent.

2nd, specific armature winding is just formed in magnetic core manufacture processing, can reduce the artificial participation of rear end.

3rd, efficiently solve the problems, such as current transformer flatness in prior art.

Description of the drawings

Fig. 1 is the three-dimensional structure diagram of existing frame combined type current transformer；

Fig. 2 is the exploded isometric figure of existing frame combined type current transformer；

Axonometric charts of the Fig. 3 for this utility model current transformer；

Axonometric charts of the Fig. 4 for another visual angle of this utility model current transformer；

Fig. 5 is the axonometric chart after the magnetic core molding of this utility model current transformer；

Positive axonometric charts of the Fig. 6-1 for the cover plate of this utility model current transformer；

Side isometric views of the Fig. 6-2 for the cover plate of this utility model current transformer；

Fig. 7 is the three-dimensional structure diagram after the magnetic core plating of this utility model current transformer；

Fig. 8-1 is the positive axonometric chart after the magnetic core cutting and grinding of this utility model current transformer；

Fig. 8-2 is the side isometric view after the magnetic core cutting and grinding of this utility model current transformer；

Fig. 9 is the axonometric chart after the magnetic core coiling of this utility model current transformer；

Exploded isometric figures of the Figure 10 for this utility model current transformer.

In accompanying drawing, the list of parts representated by each label is as follows：

1-magnetic core；3-coil；4-metallic laminas；5-terminal；6-skeleton

1-magnetic core；11-center pillar；111-- electroplated coatings；12-primary blades；121-- notches；122-notch 123- Medial wall；1231-front end face, 1232-rear end face；124-vane tip；125-primary lower limb；1251-groove； 1252nd, 1253-primary terminals foot；13-secondary blades；131st, 132-notch；135-secondary lower limb；1351-secondary recessed Groove；1352nd, 1353-secondary terminal supportor；2-cover plate；21st, 22-hollow out；211st, 212,221,222-boss；3-coil； 31st, 32-lead.

Specific embodiment

For the professional and technical personnel of the industry, the component involved by this utility model, in the different processing phases Between structure have differences, manufacture the course of processing in, by different plant equipment and clamping apparatus and process implementing method, Neng Gou Upper reference in terms of structure and processing refers to and derives various change, and which is all without departing from scope of the present utility model.And it is therein Illustrating and illustrating inherently carries out general elaboration and is used for the ease of popular understanding, rather than is to of the present utility model Limit.

Refer to accompanying drawing 3, Fig. 4, the utility model proposes a kind of inductive type current transformer, by magnetic core 1, cover plate 2, line Circle 3 is constituted, and coil 3 is wound on the center pillar of magnetic core 1, and cover plate 2 is by being adhesively fixed on the top surface of magnetic core 1.Wherein, as this practicality New basic idea is to form a winding by the electrodeposited coating arranged on magnetic core 1, and coil 3 is wound on the center pillar of magnetic core 1 and forms another One winding.From the point of view of component count, compare and existing frame combined type current transformer (referring to Fig. 2), it is evident that lacked bone Frame 6, metallic laminas 4, but this utility model does not lose its function to be presented while component is reduced.Next Can be directed to the utility model proposes a kind of inductive type current transformer enter with reference to each structure the step of process according to procedure technology Row detailed description.

As shown in figure 5, a kind of magnetic core of inductive type current transformer is presented by this utility model, magnetic core 1 is H-shaped, by Center pillar 11 and positioned at 11 end face of center pillar and the unequal blade 12 in axially vertical section and blade 13 are constituted.Center pillar 11 is horizontal Center pillar 11 is in laterally disposed when in use for structure, i.e. magnetic core 1.Blade 12, blade 13 are shaped like, but the thickness of blade 12 is big In the thickness of blade 13, its object is to increase the mechanically stressed of milled processed after follow-up electroplated coating.11 basis of magnetic core middle post Demand could be arranged to cylindric or flat column；The top 124 of blade 12 is provided with notch 121 and 122, will according to actual production Ask, notch 121,122 only arbitrarily can arrange one, its object is to the fool proof identification in direction；The top of blade 13 equally sets It is equipped with two notches 131,132；The notch 121,122,131,132 of 13 top edge of blade 12 and blade of magnetic core 1 is magnetic core The recess that top surface is opened up.The height such as blade 12 and blade 13, blade bottom 125 and 135 is coplanar.Further, blade bottom Portion 135 can reserve the wire lead slot 1351 of the lead welding of subsequent coil 3, after so more ensureing this finished current Coplane degree.

Reference picture 6-1 and Fig. 6-2, cover plate 2 is a plates, and the edge of cover plate 2 has local perpendicular to plates edge Hollow out 21 and 22, local hollow out 21,22 are to be opened up at the position corresponding with the top surface of the blade 12 of magnetic core 1 and blade 13 Deep gouge.Thus the edge corner of cover plate forms boss 211,212,221,222, location and shape and the magnetic core 1 of each boss Blade 12 and 13 top edge notch 121,122,131,132 of blade match respectively correspondence, so design be advantageous in that, cover plate 3 when being assembled to above magnetic core 1, can because the restriction of groove and the location and shape of boss, will not slide anteroposterior, plates upper table Face is smooth and one jiao on the face identification point 23 for being provided with location discrimination.

Preferably, magnetic core 1 and cover plate 2 are by ferrum oxide and one or more other metals (such as manganese, zinc, nickel, magnesium) Oxide or carbonate compound mixing composition, then the shape specified through pre-designed satisfaction application this utility model and Architectural feature carries out mould compacting and then high temperature sintering, finally by the machining of auxiliary, due to ferritic processing and forming Known technology is already belonging to, here is not repeated.

With reference to Fig. 7, electroplating processes are carried out to the magnetic core 1 that sintering is processed.The overall all attachment electroplated coatings of blade 12, bag Include but be not limited to the notch 121,122 of blade 12, and bottom 125,135；Based on basic idea of the present utility model, it is necessary to protect By comprehensive uniform electroplating processes, thickness of coating is 0.4～1.0 μm for the medial wall 123 of card blade 12, and with magnetic core middle post 11 Bordering on angle allows the presence of the electrodeposited coating 111 for exceeding.The 135 whole face of bottom that only needs of blade 13 carries out electroplating processes.According to The use occasion of transformer, the electroplated coating preferably metal material such as gold, silver, stannum, nickel.

Reference picture 8-1 and 8-2, the primary side blade 12 of the magnetic core 11 electroplated enter from bottom to top from 125 center of bottom Row cutting, forms the groove 1251 being open outwardly of 12 bottom surface of blade.Groove 1251 is shaped as " ∩ " shape, or referred to as inverted " u " Shape groove, the cutting width of groove 1251 is 0.5--2.0mm, and depth of cut is with the periphery 0.2-1.0mm more than axial center pillar 11 It is defined.It is intended that the electrodeposited coating for depositing 123 surface of side wall of blade 12 comes by axial symmetry cutting of center pillar 11, will The electrodeposited coating of the medial wall 123 of blade 12 forms the electricity that with center pillar 11 as the center of circle and around center pillar 11 band " ∩ " type disconnects mouth Cladded conductive line, the plating layer conductor is finally using the armature winding as this utility model inductive type current transformer.Pay special attention to , because there is fabrication error, if plating when 11 surface of magnetic core middle post exist a trap close electrodeposited coating 111, cutting when need by The electrodeposited coating 111 also cuts off.Also 13 bottom surface of primary side blade can be cut simultaneously, forms the opening court of 13 bottom surface of blade Outer groove 1351.Groove 1251 is more than the outer surface of magnetic core middle post 11 with groove 1351 for grade facet and depth of cut.Cut After cutting, groove 1251 and terminal supportor 1252 and 1253 formed on the bottom of blade 12, the bottom formation groove 1351 of blade 13 and Terminal supportor 1352 and 1353, the depth on center pillar 11 more than center pillar periphery carry out cutting and form tangent plane 112, blade 12, blade 13 and the groove top of the cleaved groove 1251 for being linked to be a plane, i.e. blade 12 in bottom, the groove 1351 of blade 13 of center pillar 11 Groove top and center pillar 11 on tangent plane 112 be linked to be a plane.Again by grinding means, 12 primary side blade top of blade is removed Emargination lacks the electrodeposited coating at place top 124, is easy to subsequent handling magnetic core bonding with cover plate.Front end face 1231, rear end face 1232 Electrodeposited coating retains.As terminal supportor is formed by the side wall that blade 12,13 cuts out groove 1251,1351, all terminal supportors Coplane degree it is consistent, and be readily produced realization.Further, based on inductance demand, blade top edge can carry out mirror ultrafinish Processed, can increase the inductance value of magnetic core 1 and the current transformer after 2 bonding forming of cover plate.

Fig. 9, Figure 10 are referred to, plain conductor of the uniform coiling with insulating barrier forms coil 3, line on magnetic core middle post 11 The coiling space of circle 3 need to be less than the marginal dimension of blade 12 and blade 13.The lead 31 and 32 of coil 3 end respectively with blade 13 Son 1352 and 1353 connects, and forms the secondary windings of transformer.Preferably, coil lead 31,32 is connected with terminal 1352 and 1353 Connect, which can be completed using various ways such as hot pressing, spot welding, wickings and be fixedly connected.

After above-mentioned manufacturing process and technique, the inductive type current transformer illustrated by this utility model is just formed.

The above is only preferred implementation of the present utility model, it is noted that above-mentioned preferred implementation should not be regarded It is that, to restriction of the present utility model, protection domain of the present utility model should be defined by claim limited range.For For those skilled in the art, in without departing from spirit and scope of the present utility model, can also make some Improvements and modifications, these improvements and modifications also should be regarded as protection domain of the present utility model.

Claims (10)

1. a kind of magnetic core, is " H " shape, including center pillar and is symmetrically connected to the blade at center pillar two ends, and two blades are respectively the first leaf Piece and the second blade, it is characterised in that：

Blade is square, including medial surface, lateral surface, top surface, bottom surface, front end face and rear end face,

Two base angle plating of blade are terminal supportor pad；

Electrodeposited coating is provided with around center pillar on the medial surface of the first blade, electrodeposited coating is non-closed, the disconnection mouth of electrodeposited coating is located at Between two terminal supportors, a plating coil for surrounding center pillar and non-closed is formed.

2. magnetic core according to claim 1, it is characterised in that：The disconnection mouth of the first blade electrodeposited coating of correspondence on the blade Position offers downward opening groove, and the two side of groove forms two terminal supportors.

3. magnetic core according to claim 2, it is characterised in that：The groove is " ∩ " shape groove, and the two side of groove is formed Two terminal supportors.

4. magnetic core according to claim 3, it is characterised in that：The electrodeposited coating of first blade, it is " ∩ " which disconnects mouth Shape, forms around center pillar and with " ∩ " shape and disconnects the plating coil of mouth.

5. the magnetic core according to any one of claim 2 to 4, it is characterised in that：The groove top of the groove and the bottom of center pillar Face is coplanar.

6. the magnetic core according to any one of claim 2 to 4, it is characterised in that：The groove width of the groove be 0.5 millimeter extremely 2 millimeters.

7. magnetic core according to claim 1, it is characterised in that：The electrodeposited coating of first blade, also extends to the first leaf On the front end face and rear end face of piece.

8. magnetic core according to claim 1, it is characterised in that：The thickness of first blade is more thick than the second blade.

9. a kind of current transformer, including the first winding and the second winding, it is characterised in that：By any one of claim 1 to 8 Described magnetic core, cover plate and coiled wire-wound coil composition, coiled wire-wound coil are wound on the center pillar of magnetic core, and cover plate is by being adhesively fixed on magnetic The top surface of the heart, wherein, the plating coil of the first blade of magnetic core is the first winding, terminal supportor as first winding of the first blade Leading-out terminal；Coiled wire-wound coil on magnetic core middle post be the second winding, coiled wire-wound coil rise, take-up end be separately fixed at the second blade Terminal supportor on, the terminal supportor of the second blade is the leading-out terminal of the second winding.

10. current transformer according to claim 9, it is characterised in that：The cover plate, in the form of sheets, thickness and magnetic core Quite, including top surface, bottom surface and four side faces, the bottom surface of cover plate is on the top with the first blade of magnetic core and the second blade for first blade Face offers deep gouge at corresponding position；The top surface of magnetic core offers recessed at the position corresponding with the heavy groove sidewall of cover plate Mouthful, the contact surface of the position in recess and heavy groove sidewall that be adhesively fixed of magnetic core and cover plate.