CN112382479B - I-shaped inductor and manufacturing method thereof - Google Patents
I-shaped inductor and manufacturing method thereof Download PDFInfo
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- CN112382479B CN112382479B CN202011132491.7A CN202011132491A CN112382479B CN 112382479 B CN112382479 B CN 112382479B CN 202011132491 A CN202011132491 A CN 202011132491A CN 112382479 B CN112382479 B CN 112382479B
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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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
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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
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Abstract
An I-inductor, comprising: the I-shaped magnetic core is arranged in the shielding cover, the shielding cover is connected with the I-shaped magnetic core, each positioning column surrounds the I-shaped magnetic core and is uniformly distributed between two ends of the I-shaped magnetic core as the center, each positioning column on the shielding cover is connected with a connecting column, the inductance coil is sleeved on the I-shaped magnetic core and sleeved on one or more positioning columns, the shielding cover is provided with a first electrode plate and a second electrode plate, the input end of the inductance coil is connected with the first electrode plate, and the output end of the inductance coil is connected with the second electrode plate. The manufacturing method of the I-shaped inductor comprises the steps of mold opening, enameled wire manufacturing, loop shielding cover sleeving and code spraying testing. The inductance coil is wound on the I-shaped magnetic core and the positioning columns, the winding mode of the inductance coil is selected according to the shielding case, the winding turns and the coil area of the inductance coil are changed in various winding modes of the inductance coil, so that the current and the inductance of the coil are adjusted, and the inductance reduced by the inductance coil is compensated.
Description
Technical Field
The invention relates to the technical field of I-shaped inductors, in particular to an I-shaped inductor and a manufacturing method thereof.
Background
The inductor is an element capable of converting electric energy into magnetic energy for storage, is a common electronic component, and is an I-shaped inductor with a framework similar to an I shape. The inductance is similar in structure to a transformer, but has only one winding, and the inductor has a certain inductance and only impedes the change of current. When the circuit is in a state of no current passing, the circuit tries to block the current passing, and when the circuit is in a state of current passing, the circuit is switched off and tries to keep the current unchanged; the inductor has the characteristic of preventing alternating current from passing through and allowing direct current to pass through smoothly.
In order to prevent the magnetic field generated by some inductors during operation from influencing the normal operation of other circuits and components, a shielding case is added to some inductors, and the shielding case in the inductors is a part for avoiding external interference and simultaneously improving the magnetic flux, such as an oscillating coil of a semiconductor radio. According to the faraday's law of electromagnetic induction and lenz's law, the direction of the induced current in the shield is opposite to the direction of the current in the coil, so that the magnetic field of the coil and the magnetic field generated by the induced current in the shield cancel each other out in the space outside the shield, and the transmitted magnetic induction lines are only a very small portion of the magnetic induction lines generated by the coil. The directions of magnetic induction lines generated by the shield and the coil are consistent between the shield and the coil, and magnetic flux generated by the coil rarely leaks out of the shield, so that the magnetic shielding effect is achieved. However, inside the coil, the magnetic field inside the coil is reduced due to the opposite direction of the coil magnetic induction line to the magnetic induction line generated by the induced current, and as a result, the inductance of the coil is reduced. Therefore, an i-inductor and a method for compensating inductance are needed.
Disclosure of Invention
Accordingly, there is a need to provide an i-inductor and a method for manufacturing the same, which can solve the problems of the prior art.
An I-inductor, comprising: an I-shaped magnetic core, an inductance coil, a shielding cover and a plurality of positioning columns, wherein a cavity is arranged in the shielding cover, the I-shaped magnetic core is arranged in the cavity of the shielding cover, the upper inner wall and the lower inner wall of the shielding cover are respectively connected with two ends of the I-shaped magnetic core, each positioning column surrounds the I-shaped magnetic core as the center and is evenly distributed between the two ends of the I-shaped magnetic core, a plurality of connecting columns are arranged on the shielding cover, each connecting column is connected with one connecting column, the inductance coil is sleeved behind the I-shaped magnetic core and sleeved on one or more positioning columns, the shielding cover is provided with a first electrode plate and a second electrode plate, the inductance coil is provided with an input end and an output end, the input end of the inductance coil is connected with the first electrode plate, and the output end of the inductance coil is connected with the second electrode plate.
Furthermore, the number of the positioning columns is at least two, and the two positioning columns are oppositely arranged between two ends of the I-shaped magnetic core.
Furthermore, it is a plurality of the quantity of reference column is four, four the reference column centers on I-shaped magnetic core is central evenly distributed between the both ends of I-shaped magnetic core.
Furthermore, the inductance coil is sleeved behind the I-shaped magnetic core and sleeved on the periphery of the four positioning columns.
Furthermore, the inductance coil is sleeved behind the I-shaped magnetic core and sequentially sleeved on each positioning column.
Furthermore, the inductance coil is sleeved behind the I-shaped magnetic core and sleeved on each positioning column and the periphery of the four positioning columns.
Furthermore, the number of the connecting columns is four, and each connecting column is connected with one end of each positioning column.
Furthermore, a protective shell is movably covered outside each connecting column.
Furthermore, the shielding case is provided with a plurality of through holes, the input end of the inductance coil penetrates one through hole to be connected with the first electrode plate, the output end of the inductance coil penetrates the other through hole to be connected with the second electrode plate, and each connecting column penetrates through one through hole of the shielding case.
A manufacturing method of an I-shaped inductor comprises the following steps:
opening the mold: processing a shielding cover formed by connecting two shells by using a die, wherein a cavity is formed in the shielding cover;
a step of manufacturing an enameled wire: installing a plurality of positioning columns in the I-shaped magnetic core, and then winding an inductance coil on the I-shaped magnetic core and the positioning columns to form an enameled wire structure;
a step of sleeving a ring cover with a shielding cover: separating the two shells, punching the two shells, mounting a first electrode plate, a second electrode plate and a plurality of connecting columns at the positions of holes in the two shells, fixing the enameled wire structure in the two shells, connecting the plurality of positioning columns with the plurality of connecting columns, welding the input end of the inductance coil with the first electrode plate through the holes in the two shells, welding the output end of the inductance coil with the second electrode plate, and splicing and fixing the two shells to fix the enameled wire structure in the cavity of the shielding case;
and code spraying test step: and spraying and printing an identification symbol on the shielding cover, and carrying out electrical test on the I-shaped inductor.
According to the I-shaped inductor, the positioning columns are arranged on the periphery of the I-shaped magnetic core, so that the inductance coil is wound between the I-shaped magnetic core and the positioning columns, the winding mode of the inductance coil is selected according to the type of the shielding case, the winding turns and the coil area of the inductance coil are changed by the multiple winding modes of the inductance coil so as to adjust the current and the inductance of the coil, and the reduced inductance of the inductance coil is compensated, so that the original performance and efficiency of the I-shaped inductor are kept.
Drawings
The figures further illustrate the invention, but the examples in the figures do not constitute any limitation of the invention.
Fig. 1 is a schematic cross-sectional structural diagram of an i-inductor in one embodiment;
FIG. 2 is a top view of an I-inductor according to one embodiment;
FIG. 3 is a schematic diagram of an arrangement of inductors in one embodiment;
FIG. 4 is a schematic diagram of another arrangement of the inductor coils in one embodiment;
FIG. 5 is a schematic diagram of yet another arrangement of inductor coils in one embodiment;
fig. 6 is a flow chart of a process for producing an i-inductor in one embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention. It is to be understood that the drawings are provided solely for the purposes of reference and illustration and are not intended as a definition of the limits of the invention. The connection relationships shown in the drawings are for clarity of description only and do not limit the manner of connection.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; either mechanically or electrically, and may be internal to both elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
It should be noted that in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 to 5, an i-inductor includes: the structure comprises an I-shaped magnetic core 100, an inductance coil 200, a shielding case 300 and a plurality of positioning columns 400, wherein a cavity 310 is arranged in the shielding case 300, the I-shaped magnetic core 100 is arranged in the cavity 310 of the shielding case 300, the upper inner wall and the lower inner wall of the shielding case 300 are respectively connected with two ends of the I-shaped magnetic core 100, each positioning column 400 surrounds the I-shaped magnetic core 100 and is uniformly distributed between the two ends of the I-shaped magnetic core 100 as the center, the shielding case 300 is provided with a plurality of connecting columns 320, each positioning column 400 is connected with one connecting column 320, the inductance coil 200 is sleeved behind the I-shaped magnetic core 100 and is sleeved on one or more positioning columns 400, the shielding case 300 is provided with a first electrode plate 330 and a second electrode plate 340, the inductance coil 200 is provided with an input end 210 and an output end 220, the input end 210 of the inductance coil 200 is connected with the first electrode plate 330, the output end 220 of the inductor 200 is connected to the second electrode plate 340. That is to say, the cavity 310 of the shielding case 300 matches the shape of the i-shaped magnetic core 100, one end of the i-shaped magnetic core 100 is provided with a plurality of through holes, and one end of the plurality of positioning pillars 400 passes through the through holes on the i-shaped magnetic core 100 and is connected with the connecting column 320. After the inductor 200 is wound on the i-shaped magnetic core 100 in a single layer or multiple layers, it is further wound on the positioning column or columns 400.
Specifically, the shielding case 300 is provided with a plurality of through holes, the input end 210 of the inductor 200 passes through one of the through holes to be connected with the first electrode plate 330, the output end 220 of the inductor 200 passes through the other of the through holes to be connected with the second electrode plate 340, and each of the connecting posts 320 is inserted into one of the through holes of the shielding case 300. The first electrode sheet 330 and the second electrode sheet 340 are connected to external elements, and the current flows through the input end 210 of the inductor 200 and flows out through the output end 220. Each positioning column 400 is connected with a connecting column 320, each connecting column 320 is fixed in the through hole of the shielding case 300 by glue, and each positioning column 400 is movably inserted in the i-shaped magnetic core 100. In one embodiment, the number of the connecting columns 320 is four, and each connecting column 320 is connected to one end of each positioning column 400. The movable cover outside each connecting column 320 is provided with a protective shell 321. The connecting column 320 serves as an indication for the positioning column 400, and at the same time, the shielding case 300 is kept airtight, and the protective casing 321 is for preventing the connecting column 320 from being worn.
Specifically, the number of the positioning columns 400 is at least two, and the two positioning columns 400 are oppositely arranged between two ends of the i-shaped magnetic core 100. A plurality of the positioning columns 400 are four in number, and the positioning columns 400 surround the I-shaped magnetic core 100 and are uniformly distributed between the two ends of the I-shaped magnetic core 100 as the center. Positioning posts 400 provide winding support for inductor 200. The winding manner of the inductance coil 200 is various, for example, the inductance coil 200 is sleeved behind the i-shaped magnetic core 100 and sleeved on the peripheries of the four positioning pillars 400, and at this time, the inductance coil 200 formed by the four positioning pillars 400 is sleeved outside the inductance coil 200 formed by the i-shaped magnetic core 100, that is, an additional inductance is superimposed on the original inductance, that is, the inductance coil 200 formed by the four positioning pillars 400 is used for compensating for the lost inductance. For example, the inductance coil 200 is sleeved on the h-shaped magnetic core 100 and sequentially sleeved on each of the positioning pillars 400, at this time, four arc coils are sequentially sleeved outside the inductance coil 200 formed by the h-shaped magnetic core 100, the inside of the shielding case 300 is uniformly divided into four regions, and the four arc coils are respectively located in the four regions and compensate for the inductance lost in each region. For example, the inductance coil 200 is sleeved behind the i-shaped magnetic core 100 and sleeved on each of the positioning pillars 400 and the peripheries of the four positioning pillars 400, at this time, four arc coils and the inductance coil 200 formed by the four positioning pillars 400 are sleeved outside the inductance coil 200 formed by the i-shaped magnetic core 100, and the number of turns of the two arc coils and the inductance coil 200 formed by the four positioning pillars 400 are set in proportion so as to compensate for the lost inductance. It should be noted that the inductance of the i-shaped inductance loss in the shielding case 300 is 1% -5% of itself, and the distance between the positioning column 400 and the i-shaped magnetic core 100 is at least 50 mm.
In the h-inductor, the positioning columns 400 are arranged around the h-core 100, so that the inductor coil 200 is wound between the h-core 100 and the positioning columns 400, the winding mode of the inductor coil 200 is selected according to the type of the shielding case 300, the winding turns and the coil area of the inductor coil 200 are changed by the winding modes of the inductor coil 200 to adjust the coil current and the inductance, and the reduced inductance of the inductor coil 200 is compensated, so that the original performance and efficiency of the h-inductor are maintained.
In an embodiment, as shown in fig. 3 and 6, a method for manufacturing an i-inductor includes the following steps:
s110, opening the mold: the shielding case 300 formed by connecting two shells is processed by using a mold, and a cavity 310 is arranged in the shielding case 300. Specifically, set up two recesses that relative and each other do not communicate in the mould for the one shot forming of two casings, two casings are the open cylinder structure of one side.
S120, manufacturing an enameled wire: the four positioning columns 400 are installed in the i-shaped magnetic core 100, and then the inductance coil 200 is wound on the i-shaped magnetic core 100 and the plurality of positioning columns 400 to form an enameled wire structure.
Specifically, the i-shaped magnetic core 100 is fixed on a jig of a winding machine, the i-shaped magnetic core 100 is wound for a specified number of turns, the operation of the winding machine is suspended, the positioning column 400 is installed on the i-shaped magnetic core 100, and the inductance coil 200 is continuously wound on the positioning column 400 to form an enameled wire structure. The distance between the positioning column 400 and the I-shaped magnetic core 100 is 100mm, the diameter of the inductance coil 200 is 2mm, the diameter of the positioning column 400 is 10mm, and the diameter of the I-shaped magnetic core 100 is 200 mm. Taking an inductance of 101 as an example, a single-layer inductance coil 200 of 100 turns is wound on an i-shaped magnetic core 100, and the inductance measured by an electrical measuring instrument is 100uH, and it is assumed that the final loss inductance of the i-shaped inductance product after being placed in a shielding case 300 is 5%, that is, the final loss inductance after being placed in the shielding case 300 is 95uH, that is, the loss is 5 uH. The method comprises the steps of fixing an I-shaped magnetic core 100 on a jig of a winding machine, winding a single-layer 100-turn inductance coil 200 on the I-shaped magnetic core 100, stopping the operation of the winding machine, installing positioning columns 400 on the I-shaped magnetic core 100, continuing to wind the inductance coil 200, and sleeving the inductance coil 200 on the peripheries of the four positioning columns 400 to form an enameled wire structure. The induction coil is sleeved on a graph formed on the peripheries of the four positioning columns 400, and the area of the graph is about 4.32 times of the circular area formed by the original induction coil 200 according to the area formula calculation.
According to inductance (uH) to inductance coefficient (turns) turns to obtain
(4.32 target turns) 2 Target inductance squared of known turns/known inductance
That is, the target number of turns is about 5.18 turns, that is, the number of turns of the inductance coil 200 sleeved on the periphery of the four positioning posts 400 is 5 turns, at this time, the winding manner of the inductance coil 200 compensates for the inductance of 4.67uH, and the inductance deviation of the final product is reduced to 6.6% of the original value.
S130, a step of sleeving a ring sleeve shielding cover 300: two the casing separates, and two punch on the casing, wherein two first electrode piece 330, second electrode piece 340 and a plurality of spliced pole 320 are installed to the position of casing upper bore, will at first the enameled wire structure is fixed two in the casing, it is a plurality of this moment reference column 400 is connected with a plurality of spliced pole 320, and the rethread is two the hole on the casing will induction coil 200's input 210 with first electrode piece 330 welds, and induction coil 200's output 220 with second electrode piece 340 welds, two the casing concatenation is fixed, makes the enameled wire structure be fixed in the cavity 310 of shield cover 300.
Specifically, the input end 210 of the inductance coil 200 is fixed with the first electrode plate 330 by welding, and the output end 220 is fixed with the second electrode plate 340 by welding, the welding material is tin, and the welding temperature is 380-450 ℃.
S140, code spraying test: and spraying and printing an identification symbol on the shielding case 300, and carrying out electrical test on the I-shaped inductor.
Specifically, the test contents are inductance, resistance value, and the like.
In an embodiment, as shown in fig. 4 and 6, a method for manufacturing an i-inductor includes the following steps:
s110, opening the mold: a shielding case 300 formed by connecting two shells is processed by using a mold, and a cavity 310 is formed in the shielding case 300. Specifically, set up two recesses relative and each other do not communicate in the mould for the one shot forming of two casings, two casings are the open cylinder structure of one side.
S120, manufacturing an enameled wire: the four positioning columns 400 are installed in the i-shaped magnetic core 100, and then the inductance coil 200 is wound on the i-shaped magnetic core 100 and the plurality of positioning columns 400 to form an enameled wire structure.
Specifically, the i-shaped magnetic core 100 is fixed on a jig of a winding machine, the i-shaped magnetic core 100 is wound for a specified number of turns, the operation of the winding machine is suspended, the positioning column 400 is installed on the i-shaped magnetic core 100, and the inductance coil 200 is continuously wound on the positioning column 400 to form an enameled wire structure. The distance between the positioning column 400 and the I-shaped magnetic core 100 is 100mm, the diameter of the inductance coil 200 is 2mm, the diameter of the positioning column 400 is 10mm, and the diameter of the I-shaped magnetic core 100 is 200 mm. Taking an inductance of 101 as an example, a single-layer inductance coil 200 of 100 turns is wound on an i-shaped magnetic core 100, and the inductance measured by an electrical measuring instrument is 100uH, and it is assumed that the final loss inductance of the i-shaped inductance product after being placed in a shielding case 300 is 5%, that is, the final loss inductance after being placed in the shielding case 300 is 95uH, that is, the loss is 5 uH. The method comprises the steps of fixing an I-shaped magnetic core 100 on a jig of a winding machine, winding a single-layer 100-turn inductance coil 200 on the I-shaped magnetic core 100, stopping the operation of the winding machine, installing positioning columns 400 on the I-shaped magnetic core 100, continuing to wind the inductance coil 200, and sequentially sleeving the inductance coil 200 on each positioning column 400 to form an enameled wire structure. The inductor coil 200 is sequentially sleeved on each positioning column 400, the figure of the inductor coil 200 is a circular combination formed by a sector and the original inductor coil 200, and the area of the combination is roughly calculated to be nine-sevenths of the area of the circle formed by the original inductor coil 200 according to the area calculation of the sector and the circle.
According to the inductance (uH) ═ inductance factor/turn number, converting to obtain
(9 x target turns/7) 2 4 target inductance squared of known turns/known inductance
That is, the target number of turns is about 8.70, that is, the number of turns of the inductor 200 sleeved on each positioning post 400 is 9, at this time, the winding manner of the inductor 200 compensates for 5.36uH, and the inductance deviation of the final product is reduced to 7.2% of the original value.
S130, sleeving a ring sleeve shielding cover 300: two the casing separates, and two punch on the casing, wherein two first electrode piece 330, second electrode piece 340 and a plurality of spliced pole 320 are installed to the position of casing upper bore, will at first the enameled wire structure is fixed two in the casing, it is a plurality of this moment reference column 400 is connected with a plurality of spliced pole 320, and the rethread is two the hole on the casing will induction coil 200's input 210 with first electrode piece 330 welds, and induction coil 200's output 220 with second electrode piece 340 welds, two the casing concatenation is fixed, makes the enameled wire structure be fixed in the cavity 310 of shield cover 300.
Specifically, the input end 210 of the inductance coil 200 is fixed with the first electrode plate 330 by welding, and the output end 220 is fixed with the second electrode plate 340 by welding, the welding material is tin, and the welding temperature is 380-450 ℃.
S140, code spraying test: and spraying and printing an identification symbol on the shielding case 300, and carrying out electrical test on the I-shaped inductor.
Specifically, the test contents are inductance, resistance value, and the like.
In an embodiment, as shown in fig. 5 and 6, a method for manufacturing an i-shaped inductor includes the following steps:
s110, opening the mold: the shielding case 300 formed by connecting two shells is processed by using a mold, and a cavity 310 is arranged in the shielding case 300. Specifically, set up two recesses that relative and each other do not communicate in the mould for the one shot forming of two casings, two casings are the open cylinder structure of one side.
S120, manufacturing an enameled wire: the four positioning columns 400 are installed in the i-shaped magnetic core 100, and then the inductance coil 200 is wound on the i-shaped magnetic core 100 and the positioning columns 400 to form an enameled wire structure.
Specifically, the i-shaped magnetic core 100 is fixed on a jig of a winding machine, the i-shaped magnetic core 100 is wound for a specified number of turns, the operation of the winding machine is suspended, the positioning column 400 is installed on the i-shaped magnetic core 100, and the inductance coil 200 is continuously wound on the positioning column 400 to form an enameled wire structure. The distance between the positioning column 400 and the I-shaped magnetic core 100 is 100mm, the diameter of the inductance coil 200 is 2mm, the diameter of the positioning column 400 is 10mm, and the diameter of the I-shaped magnetic core 100 is 200 mm. Taking an inductance of 101 as an example, a single-layer inductance coil 200 of 100 turns is wound on an i-shaped magnetic core 100, and the inductance measured by an electrical measuring instrument is 100uH, and it is assumed that the final loss inductance of the i-shaped inductance product after being placed in a shielding case 300 is 5%, that is, the final loss inductance after being placed in the shielding case 300 is 95uH, that is, the loss is 5 uH. The method comprises the steps of fixing an I-shaped magnetic core 100 on a jig of a winding machine, winding a single-layer 100-turn inductance coil 200 on the I-shaped magnetic core 100, stopping the operation of the winding machine, installing positioning columns 400 on the I-shaped magnetic core 100, continuing to wind the inductance coil 200, and sleeving the inductance coil 200 on each positioning column 400 and the periphery of four positioning columns 400 to form an enameled wire structure. Calculating the area by combining the two previous embodiments, roughly calculating the area of the combination and the inductance (uH) and the number of turns, and converting the calculated area and the inductance (uH) into the inductance and the number of turns
4*(9/7N1) 2 +(4.32N2) 2 Target inductance squared of known turns/known inductance
I.e., 6.61N1 2 +18.67N2 2 At 500, the number of turns N1 and N2 is about 4.45, that is, the number of turns of the inductor 200 sleeved on each of the positioning posts 400 is 4, the number of turns of the inductor 200 sleeved on the four positioning posts 400 is 4, and at this time, the inductor 200 is wound to compensate the inductor 4.04uH, and the inductance deviation of the final product is reduced to 19.2%.
S130, a step of sleeving a ring sleeve shielding cover 300: two of the separation the casing, and two punch on the casing, wherein two first electrode piece 330, second electrode piece 340 and a plurality of spliced pole 320 are installed to the position of casing upper hole, will enameled wire structure fixes two in the casing, a plurality of this moment reference column 400 is connected with a plurality of spliced poles 320, and the rethread two hole on the casing will inductance coils 200's input 210 with first electrode piece 330 welds, and inductance coils 200's output 220 with second electrode piece 340 welds, two the casing concatenation is fixed, makes enameled wire structure is fixed in the cavity 310 of shield cover 300.
Specifically, the input end 210 of the inductance coil 200 is fixed with the first electrode plate 330 by welding, and the output end 220 is fixed with the second electrode plate 340 by welding, the welding material is tin, and the welding temperature is 380-450 ℃.
S140, code spraying test: and spraying and printing an identification symbol on the shielding case 300, and carrying out electrical test on the I-shaped inductor.
Specifically, the test contents are inductance, resistance value, and the like.
The compensation rate of the three winding methods is reduced in sequence by combining the three embodiments, the third embodiment of three consumable parts of winding turns is better than the first embodiment of the second embodiment, and the second embodiment has the best effect by combining the consumable parts and the deviation, namely, the second embodiment is preferred. It should be noted that the winding manner also includes various other manners, such as a winding manner of any three or less positioning pillars, a combination of four positioning pillar windings and any non-adjacent positioning pillar windings, and so on, which are not described herein redundantly.
In summary, the above embodiments are not intended to be limiting embodiments of the present invention, and modifications and equivalent variations made by those skilled in the art based on the spirit of the present invention are within the technical scope of the present invention.
Claims (10)
1. An I-inductor, comprising: the magnetic core comprises an I-shaped magnetic core, an inductance coil, a shielding cover and a plurality of positioning columns, wherein a cavity is formed in the shielding cover, the I-shaped magnetic core is arranged in the cavity of the shielding cover, the upper inner wall and the lower inner wall of the shielding cover are respectively connected with two ends of the I-shaped magnetic core, each positioning column surrounds the I-shaped magnetic core as the center and is evenly distributed between the two ends of the I-shaped magnetic core, the distance between the positioning column and the I-shaped magnetic core is at least 50 mm, a plurality of connecting columns are arranged on the shielding cover, each positioning column is connected with one connecting column, the inductance coil is sleeved behind the I-shaped magnetic core and sleeved on one or more positioning columns, the shielding cover is provided with a first electrode plate and a second electrode plate, the inductance coil is provided with an input end and an output end, the input end of the inductance coil is connected with the first electrode plate, and the output end of the inductance coil is connected with the second electrode plate.
2. The I-shaped inductor according to claim 1, wherein the number of the positioning columns is at least two, and the two positioning columns are oppositely arranged between two ends of the I-shaped magnetic core.
3. The I-shaped inductor according to claim 2, wherein the number of the positioning columns is four, and the four positioning columns surround the I-shaped magnetic core as a center and are uniformly distributed between two ends of the I-shaped magnetic core.
4. The I-shaped inductor according to claim 3, wherein the inductor coil is sleeved behind the I-shaped magnetic core and sleeved on the periphery of the four positioning columns.
5. An I-shaped inductor according to claim 3, wherein the inductor coil is sleeved behind the I-shaped magnetic core and sequentially sleeved on each positioning column.
6. An i-inductor according to claim 3, wherein the inductor coil is disposed behind the i-core and is disposed on each of the positioning posts and on the periphery of the four positioning posts.
7. The I-shaped inductor according to claim 3, wherein the number of the connecting columns is four, and each connecting column is connected with one end of each positioning column.
8. The I-shaped inductor according to claim 1, wherein a protective shell is disposed on the outer movable cover of each connecting column.
9. The i-inductor according to claim 1, wherein the shielding case defines a plurality of through holes, an input end of the inductor coil passes through one of the through holes to be connected to the first electrode plate, an output end of the inductor coil passes through another one of the through holes to be connected to the second electrode plate, and each of the connecting posts is inserted into one of the through holes of the shielding case.
10. A method for making an i-inductor according to any one of claims 1 to 9, comprising the steps of:
opening the mold: processing a shielding cover formed by connecting two shells by using a die, wherein a cavity is formed in the shielding cover;
a step of manufacturing an enameled wire: mounting a plurality of positioning columns in the I-shaped magnetic core, and then winding an inductance coil on the I-shaped magnetic core and the plurality of positioning columns to form an enameled wire structure;
sleeving a shielding cover by using a ring sleeve: separating the two shells, punching the two shells, wherein a first electrode plate, a second electrode plate and a plurality of connecting columns are installed at the positions of the holes on the two shells, the enameled wire structure is fixed in the two shells, the plurality of positioning columns are connected with the plurality of connecting columns, the input end of the inductance coil is welded with the first electrode plate through the holes on the two shells, the output end of the inductance coil is welded with the second electrode plate, and the two shells are spliced and fixed, so that the enameled wire structure is fixed in the cavity of the shielding case;
and (3) code spraying testing: and spraying and printing an identification symbol on the shielding cover, and carrying out electrical test on the I-shaped inductor.
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