CN110391078A - A kind of mutual inductor - Google Patents
A kind of mutual inductor Download PDFInfo
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- CN110391078A CN110391078A CN201910477682.8A CN201910477682A CN110391078A CN 110391078 A CN110391078 A CN 110391078A CN 201910477682 A CN201910477682 A CN 201910477682A CN 110391078 A CN110391078 A CN 110391078A
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- mutual inductor
- armature winding
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- 238000004804 winding Methods 0.000 claims abstract description 104
- 230000008439 repair process Effects 0.000 claims abstract description 43
- 239000002245 particle Substances 0.000 claims abstract description 27
- 238000012937 correction Methods 0.000 claims description 21
- 239000003822 epoxy resin Substances 0.000 claims description 15
- 229920000647 polyepoxide Polymers 0.000 claims description 15
- 239000003292 glue Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 238000009826 distribution Methods 0.000 claims description 4
- 238000012552 review Methods 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims 1
- 239000010949 copper Substances 0.000 claims 1
- 239000004033 plastic Substances 0.000 claims 1
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- 230000000694 effects Effects 0.000 abstract description 19
- 230000007547 defect Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000002829 reductive effect Effects 0.000 abstract description 7
- 230000008859 change Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000021615 conjugation Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 208000035859 Drug effect increased Diseases 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- 229920001617 Vinyon Polymers 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
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- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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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
- H01F27/28—Coils; Windings; Conductive connections
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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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2895—Windings disposed upon ring cores
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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
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- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a kind of mutual inductors, belong to mutual inductor field, a kind of mutual inductor, armature winding and secondary windings can be linked together structure by encapsulating layer and connecting layer, so that plug-in unit is simple, and the volume of this mutual inductor can be effectively reduced, and then reduce production cost, pass through interior tip-in particle simultaneously, the crack of connecting layer and encapsulating layer surface can effectively be filled up, to realize the effect filled up and crack is effectively inhibited to continue increase, by correcting repair layer, it can be after this mutual inductor be linked together, by the variation for controlling temperature, make to correct repair layer fusing, it is deformed to adapt to the shape of contact surface, effectively eliminate the micro gap and bubble of contact surface, and then improve the Connected degree of contact surface, electric discharge phenomena caused by effectively control because of micro gap and bubble, on the one hand safety is improved, it on the other hand can be with The quality of this mutual inductor is improved, reduces defect ware, and then significantly improve the service life of this mutual inductor.
Description
Technical field
The present invention relates to mutual inductor fields, more specifically to a kind of mutual inductor.
Background technique
Mutual inductor is also known as instrument transformer, is the general designation of current transformer and voltage transformer.High voltage can be become
Low-voltage, high current become low current, for measuring or protecting system.Its function mainly by high voltage or high current in proportion
It is transformed into normal low voltage (100V) or standard small electric current (5A or 1A, refer both to rated value), to realize that measuring instrumentss, protection are set
Standby and automatic control equipment standardization, miniaturization.Simultaneously mutual inductor may further be used to separate high-voltage system, with guarantee the person and
The safety of equipment.
Electric power is often sent to user, Wu Fayong using alternating voltage, big current loop to transmit electric energy by electric system
Instrument is directly measured.The effect of mutual inductor, exactly dropping to alternating voltage and high current in proportion can be direct with instrument
The numerical value of measurement, directly measures convenient for instrument, while providing power supply for relay protection and automatic device.Electric system mutual inductor
It is that electrical network high voltage, the information of high current are transmitted to low-voltage, the metering of low current secondary side, measuring instrumentss and relay to protect
A kind of special transformer of shield, automatic device is the contact element of primary system and electrical secondary system, first winding access electricity
Net, secondary winding are interconnected with measuring instrumentss, protective device etc. respectively.Mutual inductor and measuring instrumentss and metering device cooperate,
The voltage, electric current and electric energy of primary system can be measured；Cooperate with relay protection and automatic device, may be constructed various to power grid
The electic protection of failure and automatic control.The quality of quality of transformer performance directly influences the accuracy of power system measuring, metering
With the reliability of relay protection movement.
Existing mutual inductor structure does not include armature winding, only does winding with electric wire when in use.Mounting means is general
It is mutual inductor to be first welded in pcb board, then electric wire is used to pass through mutual inductor as winding, is then welded on pcb board again, still
Such infrastructure product volume is big, and PCB plug-in unit production efficiency is low, high production cost；And the winding of existing mutual inductor generally uses
Epoxy resin and shell encapsulating, but epoxy resin surface easily generates crack, while epoxy resin and winding contact surface are easily
Occur to loosen or generate bigger crack because of micro gap and bubble, causes mutual inductor electric discharge phenomena serious, it is hidden to there is safety
Suffer from, while also result in the service life for reducing mutual inductor.
Summary of the invention
1. technical problems to be solved
Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a kind of mutual inductors, it passes through encapsulating layer
Armature winding and secondary windings can be linked together structure with connecting layer, so that plug-in unit is simple, and this can be effectively reduced
The volume of mutual inductor, and then reduce production cost, while by interior tip-in particle, can effectively fill up use epoxy resin as
The crack on the surface of connecting layer and encapsulating layer is filled up to realize and crack is effectively inhibited to continue the effect increased, passes through correction
Repair layer, by controlling the variation of temperature, can make to correct repair layer fusing, to adapt to after this mutual inductor is linked together
The shape of contact surface is deformed, and effectively eliminates the micro gap and bubble of contact surface, and then improve the Connected degree of contact surface, from
And electric discharge phenomena caused by effectively controlling because of micro gap and bubble, safety is on the one hand improved, this on the other hand can be improved
The quality of mutual inductor reduces defect ware, and then significantly improves the service life of this mutual inductor.
2. technical solution
To solve the above problems, the present invention adopts the following technical scheme that.
There are shell in a kind of mutual inductor, including bottom plate, the bottom plate upper end, are equipped with magnetic core, the magnetic in the shell
Core outer end is wound with secondary windings, and encapsulating layer is perfused between the outer casing inner wall and secondary windings, and the bottom plate is equipped with two
A symmetrical armature winding, the armature winding passes through magnetic core inner ring, and the leading foot of armature winding runs through bottom plate, described
Connecting layer is equipped between armature winding, shell and bottom plate, the armature winding, secondary windings and bottom plate are fixed as by connecting layer
Integral structure, the armature winding and secondary windings surface are equipped with correction repair layer, helped described in two split slot be located at just
The position that the position that contacts with connecting layer of grade winding and secondary windings are contacted with encapsulating layer, can be with by encapsulating layer and connecting layer
Armature winding and secondary windings are linked together structure, so that plug-in unit is simple, and can be effectively reduced the volume of this mutual inductor,
And then production cost is reduced, while by interior tip-in particle, can effectively fill up the crack of connecting layer and encapsulating layer surface, thus
Realize fill up and effectively inhibit crack continue increase effect, by correct repair layer, can after this mutual inductor is linked together,
By controlling the variation of temperature, makes to correct repair layer fusing, so that the shape for adapting to contact surface is deformed, effectively eliminate contact
The micro gap and bubble in face, and then the Connected degree of contact surface is improved, thus caused by effectively controlling because of micro gap and bubble
On the one hand electric discharge phenomena improve safety, the quality of this mutual inductor on the other hand can be improved, and reduce defect ware, and then significant
Improve the service life of this mutual inductor.
Further, the armature winding uses single strand of copper wire, and the copper wire passes through magnetic core inner ring.
Further, the magnetic core is using annular ultracrystalline magnetic core, and secondary windings is formed using coil winding machine automatic winding.
Further, the connecting layer includes lower even layer and upper leveling, and the upper leveling, lower even layer and bottom plate are from top to bottom
It is sequentially connected, the surface for connecting layer can be effectively covered down by upper leveling, connects layer under one side effective protection, is not easy its surface
Crack occurs, reduces the probability of happening of electric discharge phenomena, improves safety, on the other hand, even if lower even layer surface generates crack, In
Under the restriction effect of upper leveling, connect layer surface crack under can effectively inhibiting and continue to increase, to effectively control electric discharge phenomena
Occurrence degree improves the service life of this mutual inductor.
Further, the lower even layer and encapsulating layer inside random distribution have multiple interior tip-in particles, the interior tip-in
Particle includes prejudging spherical shell and multiple equally distributed positioning protrusion, and multiple positioning protrusion, which are fixedly connected on, prejudges outside spherical shell
Side, described to prejudge spherical shell inner end filled with glue is reviewed one's lessons by oneself, after connecting layer surface generation crack instantly, crack presence is expanded outwardly
Power, thus can internal tip-in particle generate it is certain pull, make the interior tip-in breakage of particles near crack, internal self-healing
Glue can flow out and filling cracks, to achieve effective control the effect of connecting layer surface crack.
Further, described to prejudge spherical shell surface programming and there are multiple equally distributed help to split slot, it is helped described in every two and splits slot
It distributes alternately with positioning protrusion, after being connected layer surface generation crack, prejudges spherical shell by the drawing for carrying out endokinetic fissure near crack
Power is pulled, slot is split close to helping for crack side and preferentially splits, after fracture extension to the interior tip-in particle, review one's lessons by oneself glue and can flow to and split
At seam, and fracture carries out viscous benefit, on the one hand crack can be inhibited to continue to increase, and on the other hand can effectively eliminate lower even layer table
The crack in face.
Further, lower even layer and the encapsulating layer are all made of epoxy resin glue material and are perfused, and pass through epoxy resin
It can achieve the effect that insulation, under the premise of improving safety, reach and armature winding and secondary windings link into an integrated entity
Effect.
Further, described to prejudge spherical shell and positioning protrusion with connecting layer and encapsulating layer using identical material, and prejudge
Shell thickness is 1-2mm, and identical material can effectively improve the combination of interior tip-in particle and connecting layer and encapsulating layer when pouring
Degree so that interior tip-in particle and the contact surface of the two are difficult to generate bubble, and then guarantees the quality of connecting layer and encapsulating layer, after making
In phase use process, it is not easy the phenomenon that generating cracking because of bubble.
Further, the correction repair layer is with a thickness of 0.5-1mm, correct blocked up easy the influences connecting layer of repair layer with it is first
The combination of grade winding and encapsulating layer and secondary windings will lead to conjugation reduction, so that armature winding and encapsulating layer are easy hair
It is raw to loosen, cause the stability of this mutual inductor to reduce, correction repair layer is excessively thin, to connecting layer and armature winding and encapsulating layer
Between secondary windings gap fill up effect it is unobvious, and on armature winding correct repair layer lower end surface extend in bottom plate
Portion can be effectively ensured the amount of the correction repair layer of softening, prevent due to state change when heating makes to correct repair layer softening
So that correction repair layer variation bring influences, it is ensured that between the successive layer of state change and armature winding and encapsulating layer
Be not in gap between secondary windings, and then reduce the electric discharge phenomena generated by gap, improves safety.
Further, the correction repair layer is made of thermoplastic, such as can be using the poly- of low-density high-pressure
Vinyl plastics, fusing point, can in this temperature range, not after the completion of encapsulating layer and connecting layer pour at 110-115 DEG C
It influences to make to rectify in the case where encapsulating layer and connecting layer performance (epoxy resin can be worked normally at a temperature of -50 DEG C to 180 DEG C)
Positive repair layer fusing, to adapt to the shape of connecting layer and encapsulating layer and armature winding and secondary windings contact surface, is deformed,
To effectively eliminate the micro gap and bubble of contact surface, and then the Connected degree of contact surface is improved, so that effectively control is because small
On the one hand electric discharge phenomena caused by gap and bubble improve safety, the quality of this mutual inductor on the other hand can be improved, reduce
Defect ware, and then significantly improve the service life of this mutual inductor.
3. beneficial effect
Compared with the prior art, the present invention has the advantages that
(1) armature winding and secondary windings can be linked together structure by encapsulating layer and connecting layer by this programme, so that
Plug-in unit is simple, and the volume of this mutual inductor can be effectively reduced, and then reduces production cost, while by interior tip-in particle,
The crack of connecting layer and encapsulating layer surface can be effectively filled up, fills up to realize and crack is effectively inhibited to continue the effect increased
Fruit, by controlling the variation of temperature, can keep correction repair layer molten by correcting repair layer after this mutual inductor is linked together
Change, so that the shape for adapting to contact surface is deformed, effectively eliminates the micro gap and bubble of contact surface, and then improve contact surface
Connected degree, so that effectively on the one hand control improves safety, on the other hand because of electric discharge phenomena caused by micro gap and bubble
The quality of this mutual inductor can be improved, reduce defect ware, and then significantly improve the service life of this mutual inductor.
(2) armature winding uses single strand of copper wire, and copper wire passes through magnetic core inner ring.
(3) magnetic core is using annular ultracrystalline magnetic core, and secondary windings is formed using coil winding machine automatic winding.
(4) connecting layer includes lower even layer and upper leveling, and upper leveling, lower even layer and bottom plate are sequentially connected from top to bottom, pass through
Upper leveling can effectively cover down the surface for connecting layer, connect layer under one side effective protection, its surface is made to be not susceptible to crack, reduce
The probability of happening of electric discharge phenomena improves safety, on the other hand, even if lower even layer surface generates crack, in the limitation of upper leveling
Under effect, connect layer surface crack under can effectively inhibiting and continue to increase, to effectively control the occurrence degree of electric discharge phenomena, improves
The service life of this mutual inductor.
(5) connecting equal random distribution inside layer and encapsulating layer under has multiple interior tip-in particles, and interior tip-in particle includes pre- interception
Shell and multiple equally distributed positioning protrusion, multiple positioning protrusion, which are fixedly connected on, prejudges on the outside of spherical shell, prejudges spherical shell inner end and fills out
Filled with glue is reviewed one's lessons by oneself, after connecting layer surface generation crack instantly, there is the power expanded outwardly in crack, thus can internal tip-in particle production
Raw certain pulls, and makes the interior tip-in breakage of particles near crack, and internal glue of reviewing one's lessons by oneself can flow out and filling cracks, thus
Achieve effective control the effect of connecting layer surface crack.
(6) prejudging spherical shell surface programming has multiple equally distributed help to split slot, and every two helps that split slot alternate with positioning protrusion
Distribution, after being connected layer surface generation crack, the spherical shell of prejudging near crack is pullled power by endokinetic fissure is carried out, close to crack one
The helping of side splits slot and preferentially splits, and after fracture extension to the interior tip-in particle, reviewing one's lessons by oneself glue can be flowed at crack, and fracture into
Row is viscous to be mended, and on the one hand crack can be inhibited to continue to increase, and on the other hand can effectively eliminate the crack of lower even layer surface.
(7) connect layer under and encapsulating layer is all made of epoxy resin glue material and is perfused, can reached by epoxy resin
The effect of insulation achievees the effect that link into an integrated entity armature winding and secondary windings under the premise of improving safety.
(8) spherical shell and positioning protrusion are prejudged with connecting layer and encapsulating layer using identical material, and are prejudged shell thickness and be
1-2mm, identical material can effectively improve when pouring, the conjugation of interior tip-in particle and connecting layer and encapsulating layer, so that interior
Tip-in particle and the contact surface of the two are difficult to generate bubble, and then guarantee the quality of connecting layer and encapsulating layer, use the later period
Cheng Zhong is not easy the phenomenon that generating cracking because of bubble.
(9) correction repair layer is with a thickness of 0.5-1mm, correct blocked up easy the influences connecting layer of repair layer and armature winding and
The combination of encapsulating layer and secondary windings will lead to conjugation reduction, so that armature winding and encapsulating layer are easy to happen loosening, cause
The stability of this mutual inductor reduces, and correction repair layer is excessively thin, to connecting layer and armature winding and encapsulating layer and secondary windings
Between gap fill up effect it is unobvious, and on armature winding correct repair layer lower end surface extend to base plate interior, heating up
When making to correct repair layer softening, the amount of the correction repair layer of softening can be effectively ensured, prevention to correct because of state change
Repair layer, which changes bring, to be influenced, it is ensured that between the successive layer of state change and armature winding and encapsulating layer and it is secondary around
Be not in gap between group, and then reduce the electric discharge phenomena generated by gap, improves safety.
(10) correction repair layer is made of thermoplastic, such as can use the vinyon of low-density high-pressure,
Its fusing point after the completion of encapsulating layer and connecting layer pour, can not influence encapsulating in this temperature range at 110-115 DEG C
Make to correct repair layer in the case where layer and connecting layer performance (epoxy resin can be worked normally at a temperature of -50 DEG C to 180 DEG C)
Fusing, to adapt to the shape of connecting layer and encapsulating layer and armature winding and secondary windings contact surface, is deformed, thus effectively
The micro gap and bubble of contact surface are eliminated, and then improves the Connected degree of contact surface, to effectively control because micro gap is gentle
On the one hand electric discharge phenomena caused by bubble improve safety, the quality of this mutual inductor on the other hand can be improved, and reduce defect ware,
And then significantly improve the service life of this mutual inductor.
Detailed description of the invention
Fig. 1 is positive structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram in section at A in Fig. 1；
Fig. 3 is the structural schematic diagram of connecting layer of the invention；
Interior tip-in grain structure schematic diagram Fig. 4 of the invention；
Fig. 5 is the structural schematic diagram in Fig. 4 at B.
Figure label explanation:
Connect layer under 1 bottom plate, 2 armature windings, 3 shells, 4 secondary windings, 5 encapsulating layers, 6 magnetic cores, 7 connecting layers, 71, on 72
Leveling, 8 prejudge spherical shell, 9 positioning protrusion, 10 help split slot, 11 correction repair layers.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention；Technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description；Obviously；Described embodiments are only a part of the embodiments of the present invention；Instead of all the embodiments, it is based on
Embodiment in the present invention；It is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment；It shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the instruction such as term " on ", "lower", "inner", "outside", " top/bottom end "
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention and simplification retouch
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.In addition, term " first ", " second " are used for description purposes only, and cannot understand
For indication or suggestion relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation " " is set
Be equipped with ", " be arranged/connect ", " connection " etc., shall be understood in a broad sense, such as " connection ", may be a fixed connection, be also possible to removable
Connection is unloaded, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be in
Between medium be indirectly connected, can be the connection inside two elements.It for the ordinary skill in the art, can be specific
Situation understands the concrete meaning of above-mentioned term in the present invention.
Embodiment 1:
Referring to Fig. 1, there are shell 3 in a kind of mutual inductor, including bottom plate 1,1 upper end of bottom plate, are equipped with magnetic core in shell 3
6, magnetic core 6 is using annular ultracrystalline magnetic core, and secondary windings 4 is formed using coil winding machine automatic winding, and 6 outer end of magnetic core is wound with secondary
Grade winding 4, is perfused with encapsulating layer 5 between 3 inner wall of shell and secondary windings 4, set on bottom plate 1 there are two it is symmetrical it is primary around
Group 2, armature winding 2 pass through 6 inner ring of magnetic core, and for armature winding 2 using single strand of copper wire is used, copper wire passes through 6 inner ring of magnetic core, and primary
The leading foot of winding 2 runs through bottom plate 1, is equipped with connecting layer 7 between armature winding 2, shell 3 and bottom plate 1, armature winding 2, it is secondary around
Group 4 is fixed as one structure with bottom plate 1 by connecting layer 7.
Referring to Fig. 2, armature winding 2 and 4 surface of secondary windings be equipped with correction repair layer 11, two help split slot 10 difference
Positioned at the position that armature winding 2 is contacted with connecting layer 7 and the position that secondary windings 4 is contacted with encapsulating layer 5, repair layer is corrected
11 with a thickness of 0.5-1mm, correct blocked up easy the influences connecting layer 7 of repair layer 11 and armature winding 2 and encapsulating layer 5 and secondary around
The combination of group 4 will lead to conjugation reduction, so that armature winding 2 and encapsulating layer 5 are easy to happen loosening, lead to this mutual inductor
Stability reduces, and correction repair layer 11 is excessively thin, between connecting layer 7 and armature winding 2 and encapsulating layer 5 and secondary windings 4
Gap fill up effect it is unobvious, and on armature winding 2 correct repair layer 11 lower end surface extend to inside bottom plate 1, heating up
When making to correct the softening of repair layer 11, the amount of the correction repair layer 11 of softening can be effectively ensured, prevention makes because of state change
Correcting repair layer 11 and changing bring influences, it is ensured that between the successive layer 7 of state change and armature winding 2 and encapsulating layer
Be not in gap between 5 and secondary windings 4, and then reduce the electric discharge phenomena generated by gap, improve safety, correction is repaired
It mends layer 11 to be made of thermoplastic, such as the vinyon of low-density high-pressure can be used, fusing point is in 110-115
DEG C, after the completion of encapsulating layer 5 and connecting layer 7 pour, encapsulating layer 5 and connecting layer 7 can not influenced in this temperature range
Make to correct the fusing of repair layer 11 in the case where performance (epoxy resin can be worked normally at a temperature of -50 DEG C to 180 DEG C), from
And the shape of connecting layer 7 and encapsulating layer 5 and 4 contact surface of armature winding 2 and secondary windings is adapted to, it is deformed, to effectively disappear
Except the micro gap and bubble of contact surface, and then the Connected degree of contact surface is improved, so that effectively control is because of micro gap and bubble
Caused by electric discharge phenomena, on the one hand improve safety, on the other hand can be improved the quality of this mutual inductor, reduce defect ware, into
And significantly improve the service life of this mutual inductor.
Referring to Fig. 3, connecting layer 7 includes lower even layer 71 and upper leveling 72, upper leveling 72, lower even layer 71 and bottom plate 1 are from upper
It is sequentially connected under, the surface for connecting layer 71 can be effectively covered down by upper leveling 72, connects layer 71 under one side effective protection, makes
Its surface is not susceptible to crack, reduces the probability of happening of electric discharge phenomena, improves safety, on the other hand, even if lower even 71 table of layer
Face generates crack and connects 71 surface crack of layer under can effectively inhibiting under the restriction effect of upper leveling 72 and continue to increase, to have
The occurrence degree of effect control electric discharge phenomena improves the service life of this mutual inductor, divides at random inside lower even layer 71 and encapsulating layer 5
Multiple interior tip-in particles are furnished with, lower even layer 71 and encapsulating layer 5 are all made of epoxy resin glue material and are perfused, and pass through epoxy resin
It can achieve the effect that insulation, under the premise of improving safety, reach and armature winding 2 and secondary windings 4 link into an integrated entity
Effect.
Referring to Fig. 4, interior tip-in particle includes prejudging spherical shell 8 and multiple equally distributed positioning protrusion 9, multiple convexes
It plays 9 and is fixedly connected on and prejudge 8 outside of spherical shell, prejudge 8 inner end of spherical shell filled with glue is reviewed one's lessons by oneself, connect 71 surface of layer instantly and generate crack
Afterwards, there is the power that expands outwardly in crack, thus can internal tip-in particle generate it is certain pull, make the interior tip-in near crack
Grain rupture, internal glue of reviewing one's lessons by oneself can flow out and filling cracks, to achieve effective control the effect of 7 surface crack of connecting layer
Fruit.
There are multiple equally distributed help to split slot 10 referring to Fig. 5, prejudging 8 surface programming of spherical shell, every two help split slot 10 with
Positioning protrusion 9 distributes alternately, and after 7 surface of connecting layer generates crack, prejudges spherical shell 8 by the drawing for carrying out endokinetic fissure near crack
Power is pulled, slot 10 is split close to helping for crack side and preferentially splits, after fracture extension to the interior tip-in particle, reviewing one's lessons by oneself glue can be flowed to
At crack, and fracture carries out viscous benefit, on the one hand crack can be inhibited to continue to increase, and on the other hand can effectively eliminate lower even layer
Spherical shell 8 and positioning protrusion 9 are prejudged with connecting layer 7 and encapsulating layer 5 using identical material, and prejudges spherical shell in the crack on 71 surfaces
8 with a thickness of 1-2mm, and identical material can effectively improve when pouring, the knot of interior tip-in particle and connecting layer 7 and encapsulating layer 5
It is right, so that interior tip-in particle and the contact surface of the two are difficult to generate bubble, and then guarantee the matter of connecting layer 7 and encapsulating layer 5
Amount, makes in later period use process, is not easy the phenomenon that generating cracking because of bubble.
Magnetic core inner ring is passed through by 2 copper wire of armature winding, it then can be by armature winding 2 by encapsulating layer 5 and connecting layer 7
It is linked together structure with secondary windings 4, so that plug-in unit is simple, and can be effectively reduced the volume of this mutual inductor, and then is reduced
Production cost, while by interior tip-in particle, it can effectively fill up the table for using epoxy resin as connecting layer 7 and encapsulating layer 5
The crack in face is filled up to realize and crack is effectively inhibited to continue the effect increased, can be mutual at this by correcting repair layer 11
After sensor is linked together, by the variation of temperature, repair correction in the case where not influencing 7 performance of encapsulating layer 5 and connecting layer
Layer 11 melts, so that the shape for adapting to contact surface is deformed, effectively eliminates the micro gap and bubble of contact surface, and then improve
The Connected degree of contact surface, so that electric discharge phenomena caused by effectively controlling because of micro gap and bubble, on the one hand improve safety, separately
On the one hand the quality of this mutual inductor can be improved, reduce defect ware, and then significantly improve the service life of this mutual inductor.
It is described above；It is merely preferred embodiments of the present invention；But scope of protection of the present invention is not limited thereto；
Anyone skilled in the art is in the technical scope disclosed by the present invention；According to the technique and scheme of the present invention and its
It improves design and is subject to equivalent substitution or change；It should be covered by the scope of protection of the present invention.
Claims (10)
1. a kind of mutual inductor, including bottom plate (1), it is characterised in that: there are shell (3), the shell in bottom plate (1) upper end
(3) magnetic core (6) are equipped in, magnetic core (6) outer end is wound with secondary windings (4), shell (3) inner wall and secondary windings
(4) be perfused with encapsulating layer (5), set on the bottom plate (1) there are two symmetrical armature winding (2) between, it is described it is primary around
Group (2) passes through magnetic core (6) inner ring, and the leading foot of armature winding (2) runs through bottom plate (1), the armature winding (2), shell (3)
Connecting layer (7) are equipped between bottom plate (1), the armature winding (2), secondary windings (4) and bottom plate (1) pass through connecting layer (7)
Be fixed as one structure, and the armature winding (2) and secondary windings (4) surface are equipped with correction repair layer (11), described in two
It helps and splits slot (10) and be located at position that armature winding (2) is contacted with connecting layer (7) and secondary windings (4) and encapsulating layer (5)
The position of contact.
2. a kind of mutual inductor according to claim 1, it is characterised in that: the armature winding (2) is using using sub-thread copper
Line, the copper wire pass through magnetic core (6) inner ring.
3. a kind of mutual inductor according to claim 1, it is characterised in that: the magnetic core (6) uses annular ultracrystalline magnetic core,
And secondary windings (4) is formed using coil winding machine automatic winding.
4. a kind of mutual inductor according to claim 1, it is characterised in that: the connecting layer (7) include it is lower even layer (71) and
Upper leveling (72), the upper leveling (72), lower even layer (71) and bottom plate (1) are sequentially connected from top to bottom.
5. a kind of mutual inductor according to claim 4, it is characterised in that: lower even layer (71) and encapsulating layer (5) are internal
Equal random distribution has multiple interior tip-in particles, and the interior tip-in particle includes prejudging spherical shell (8) and multiple equally distributed positioning
Raised (9), multiple positioning protrusion (9), which are fixedly connected on, prejudges on the outside of spherical shell (8), described to prejudge the filling of spherical shell (8) inner end
Review one's lessons by oneself glue.
6. a kind of mutual inductor according to claim 5, it is characterised in that: it is described prejudge spherical shell (8) surface programming have it is multiple
Equally distributed help is split slot (10), helps described in every two and splits slot (10) and distribute alternately with positioning protrusion (9).
7. a kind of mutual inductor according to claim 4, it is characterised in that: lower even layer (71) and the encapsulating layer (5) are adopted
It is perfused with epoxy resin glue material.
8. a kind of mutual inductor according to claim 1, it is characterised in that: described to prejudge spherical shell (8) and positioning protrusion (9)
Identical material is used with connecting layer (7) and encapsulating layer (5), and prejudges spherical shell (8) with a thickness of 1-2mm.
9. a kind of mutual inductor according to claim 1, it is characterised in that: the correction repair layer (11) is with a thickness of 0.5-
1mm, and the lower end surface that repair layer (11) are corrected on armature winding (2) extends to bottom plate (1) inside.
10. a kind of mutual inductor according to claim 1, it is characterised in that: the correction repair layer (11) uses thermoplasticity
Plastics are made.
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| CN201910477682.8A CN110391078A (en) | 2019-06-03 | 2019-06-03 | A kind of mutual inductor |
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| CN201910477682.8A CN110391078A (en) | 2019-06-03 | 2019-06-03 | A kind of mutual inductor |
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| CN110391078A true CN110391078A (en) | 2019-10-29 |
Family
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| CN201910477682.8A Pending CN110391078A (en) | 2019-06-03 | 2019-06-03 | A kind of mutual inductor |
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| CN112829396A (en) * | 2021-01-22 | 2021-05-25 | 梁飞 | Fireproof color steel sandwich panel and preparation method thereof |
| CN113178317A (en) * | 2021-04-16 | 2021-07-27 | 秦令轩 | Magnetic-lead invagination type mutual inductor glue sealing process |
| CN113183374A (en) * | 2021-04-16 | 2021-07-30 | 杨浩 | Seam-removing and bubble-removing type mutual inductor glue sealing process |
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| CN206480481U (en) * | 2016-12-28 | 2017-09-08 | 久利科技（苏州）有限公司 | A kind of high-precision low current transformer |
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| CN113183374A (en) * | 2021-04-16 | 2021-07-30 | 杨浩 | Seam-removing and bubble-removing type mutual inductor glue sealing process |
| CN113178317B (en) * | 2021-04-16 | 2022-11-15 | 佛山市华电互感开关有限公司 | Magnetic-lead invagination type mutual inductor glue sealing process |
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