CN115602438A - Magnetic core preparation process for magnetic coupling inductor - Google Patents
Magnetic core preparation process for magnetic coupling inductor Download PDFInfo
- Publication number
- CN115602438A CN115602438A CN202211405794.0A CN202211405794A CN115602438A CN 115602438 A CN115602438 A CN 115602438A CN 202211405794 A CN202211405794 A CN 202211405794A CN 115602438 A CN115602438 A CN 115602438A
- Authority
- CN
- China
- Prior art keywords
- phi
- magnetic core
- central control
- magnetic
- control processor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 230000008878 coupling Effects 0.000 title abstract description 8
- 238000010168 coupling process Methods 0.000 title abstract description 8
- 238000005859 coupling reaction Methods 0.000 title abstract description 8
- 230000004907 flux Effects 0.000 claims abstract description 140
- 238000012360 testing method Methods 0.000 claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 18
- 239000000126 substance Substances 0.000 claims abstract description 17
- 238000000137 annealing Methods 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000000498 ball milling Methods 0.000 claims abstract description 4
- 238000011049 filling Methods 0.000 claims abstract description 4
- 238000010304 firing Methods 0.000 claims abstract description 4
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 4
- 239000010439 graphite Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 238000012937 correction Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 238000012797 qualification Methods 0.000 description 6
- -1 iron-silicon-aluminum Chemical compound 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000702 sendust Inorganic materials 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 229910002796 Si–Al Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009689 gas atomisation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
Abstract
The invention relates to the technical field of magnetic core preparation, in particular to a magnetic core preparation process for a magnetic coupling inductor, which comprises the steps of sequentially preparing simple substances of Mn, ni, zn, fe and C into blocks; crushing each block into powder by ball milling, filling the powder into a cavity of a graphite mold, introducing current into two ends of the mold to fire the powder, and annealing after firing for a preset time to obtain a magnetic core; placing the magnetic core into a testing module and testing the magnetic flux of the magnetic core by using preset testing conditions; and the central control processor judges that the magnetic flux of the magnetic core does not accord with the standard after finishing the test condition of the test module for the magnetic core, and selects a mould with a corresponding size according to the magnetic flux of the magnetic core after the test condition is adjusted before the central control processor manufactures the magnetic core of the next batch so as to manufacture the magnetic core with a corresponding cross section. According to the invention, the prepared magnetic core is debugged, so that the prepared finished product meets the requirements of users, and the preparation efficiency of the magnetic core is effectively improved.
Description
Technical Field
The invention relates to the technical field of magnetic core preparation, in particular to a magnetic core preparation process for a magnetic coupling inductor.
Background
The inductor is a group of coaxial wire turns connected in series and wound on an insulating framework or a magnetic core or an iron core by using enameled wires, yarn-covered wires or plastic covered wires and the like, and mainly has the functions of isolating and filtering alternating current signals or forming a resonant circuit with a capacitor, a resistor and the like.
In the prior art, magnetic core devices are widely applied to various fields of life, along with the improvement of electronic technology, the requirements on magnetic devices are higher and higher, the development is mainly carried out in the direction of miniaturization and high frequency, and higher requirements on magnetic loss and temperature rise performance are undoubtedly required. In order to optimize the performance of the sendust powder, the sendust powder is prepared on the market by gradually replacing the traditional crushing mode with a gas atomization mode.
Chinese patent publication no: CN110957096A discloses a Fe-Si-Al magnetic core and a preparation process thereof, the method comprises: smelting a cast ingot, and adding modified superfine SiC powder in the smelting process; preparing aluminum ferrosilicon powder; and (3) carrying out phosphating treatment on the surface of the prepared iron-silicon-aluminum powder: carrying out insulation coating treatment on the phosphated iron-silicon-aluminum powder, and pressing the treated material into an iron-silicon-aluminum magnetic core; annealing the press-formed iron-silicon-aluminum magnetic core in a nitrogen atmosphere; and carrying out surface spraying treatment on the annealed iron-silicon-aluminum magnetic core.
The prior art cannot adjust the manufacturing process in real time in the process of preparing the magnetic core, and if the magnetic core does not meet the requirement, defective products can be caused, so that the preparation efficiency of the magnetic core is reduced.
Disclosure of Invention
In order to achieve the above object, the present invention provides a magnetic core manufacturing process for a magnetic coupling inductor, so as to overcome the problem of low magnetic core manufacturing efficiency in the prior art.
The invention discloses a magnetic core preparation process for a magnetic coupling inductor, which is characterized by comprising the following steps of:
step s1, preparing a simple substance Mn, a simple substance Ni, a simple substance Zn, a simple substance Fe and a simple substance C into blocks in sequence;
step s2, crushing the blocks into powder through ball milling, filling the powder into a cavity of a graphite mold, introducing current into two ends of the mold to fire the powder, and annealing after firing for a preset time to obtain a magnetic core;
step s3, placing the magnetic core into a testing module and testing the magnetic flux of the magnetic core by using preset testing conditions to judge whether the magnetic flux of the manufactured magnetic core meets the standard or not;
step s4, when preliminarily determining that the magnetic flux of the magnetic core does not meet the standard, the central control processor corrects the test condition of the test module for the magnetic core according to the magnetic flux of the magnetic core measured by the test module so as to further determine whether the actual magnetic flux of the magnetic core is within a preset allowable interval;
and step s5, after the central control processor finishes the test conditions of the test module for the magnetic cores, determining that the magnetic fluxes of the magnetic cores do not meet the standard, and before the central control processor carries out the manufacture of the magnetic cores of the next batch, selecting the dies with corresponding sizes according to the magnetic fluxes of the magnetic cores after the test conditions are adjusted to manufacture the magnetic cores with corresponding cross sections.
Further, in the step s3, a single prepared magnetic core is put into a corresponding position in the test module to detect the magnetic flux phi of the magnetic core, the preset test conditions of the test module for the magnetic core include an initial coil turn number N0 and an initial energizing current I0, the central control processor is provided with a preset standard magnetic flux phi 0,
if phi is larger than phi 0, the central control processor judges that the magnetic flux of the magnetic core does not meet the standard, calculates the difference value delta phi a between phi and phi 0, adjusts the initial electrifying current to a corresponding value according to the delta phi a, and sets delta phi a = phi-phi 0;
if phi = phi 0, the central control processor judges that the magnetic flux of the magnetic core meets the standard and judges that the preparation of the magnetic core is finished;
if phi is less than phi 0, the central control processor judges that the magnetic flux of the magnetic core does not meet the standard, calculates the difference value delta phi b between phi 0 and phi, adjusts the number of turns of the initial coil to a corresponding value according to the delta phi b, and sets delta phi b = phi 0-phi.
Further, when phi is larger than phi 0, the central control processor judges whether the magnetic flux difference value is in a preset interval according to the difference value delta phi a between phi and phi 0, the central control processor is provided with a preset magnetic flux difference value delta phi,
the central control processor is provided with a first preset magnetic flux excess difference delta phi a1, a second preset magnetic flux excess difference delta phi a2, a third preset magnetic flux excess difference delta phi a3, a first preset current regulating coefficient alpha 1 and a second preset current regulating coefficient alpha 2, wherein the delta phi a1 is smaller than the delta phi a2 to be smaller than the delta phi a3, the alpha 1 is larger than 0.8 to be smaller than the alpha 2 to be smaller than 1,
if the delta phi a is smaller than or equal to delta phi a1, the central control processor judges that the magnetic flux difference value of the magnetic core is within a preset allowable interval;
if delta phi a1 is less than delta phi a and less than delta phi a2, the central control processor judges that alpha 2 is used for adjusting the initial electrifying current;
if delta phi a2 is less than delta phi a and less than delta phi a3, the central control processor judges that alpha 1 is used for adjusting the initial electrifying current;
if delta phi a > [ delta phi ] a3, the central control processor judges that the magnetic core magnetic flux difference value exceeds a preset allowable interval, and the magnetic core magnetic flux difference value is within the preset allowable interval by adjusting the cross section area of the magnetic core;
the central processor records the initial energization current adjusted with α I as I ', where I =1,2, and I' = I0 × α I is set.
Further, in the process of adjusting the initial electrifying current, when the current is adjusted to I ' and the corresponding magnetic flux phi ' is higher than the preset standard magnetic flux, the central control processor carries out secondary adjustment on the initial electrifying current according to the delta phi a ', sets delta phi a ' = phi ' -phi 0, a fourth preset magnetic flux excess difference delta phi a4, a fifth preset magnetic flux excess difference delta phi a5, a third preset current adjusting coefficient alpha 3 and a fourth preset current adjusting coefficient alpha 4 are arranged in the central control processor, wherein the delta phi a4 is less than the delta phi a5,0.6 < alpha 1 < alpha 2 < 0.9,
if the delta phi a' is less than or equal to the delta phi a3, the central control processor judges that the magnetic flux difference value of the magnetic core is within a preset allowable interval;
if delta phi a3 is less than delta phi a' and less than delta phi a4, the central control processor determines to adjust the initial energization current by using alpha 4;
if delta phi a' > [ delta phi ] a4, the central control processor determines to adjust the initial energization current by using alpha 3;
the central processor records the initial energization current adjusted using α I as I ", where I =3,4, and I" = I0 × α I is set.
Further, the central control processor compares the regulated current I' with a preset critical current Imin to judge whether the magnetic core is qualified or not,
if I '< Imin and phi' < phi 0, the central control processor adjusts the number of initial coil turns;
if I '< Imin and phi' > phi 0, the central control processor judges that the magnetic core is qualified;
if I 'is greater than Imin and phi' is less than phi 0, the central control processor adjusts the number of turns of the initial coil;
if I 'is greater than Imin and phi' is greater than phi 0, the central processor secondarily adjusts the initial energization current.
Further, when phi is less than phi 0, the central control processor judges whether the magnetic flux difference value is in a preset interval according to the difference value delta phi b between phi and phi 0, a first preset magnetic flux low difference value delta phi b1, a second preset magnetic flux low difference value delta phi b2, a third preset magnetic flux low difference value delta phi b3, a first preset turn number adjusting coefficient beta 1 and a second preset turn number adjusting coefficient beta 2 are arranged in the central control processor, wherein delta phi b1 < [ delta ] phi ] b2 < [ delta ] phi ] b3,1 < beta 2 < 1.3,
if the delta phi b is less than or equal to the delta phi b1, the central control processor judges that the magnetic flux difference value of the magnetic core is within a preset allowable interval;
if delta phi b1 is less than delta phi b and less than delta phi b2, the central control processor adjusts the initial coil turns by using beta 1;
if delta phi b2 is less than delta phi b and less than delta phi b3, the central control processor adjusts the initial coil turns by using beta 2; if delta phi b > [ delta phi ] b3, the central control processor judges that the magnetic core magnetic flux difference value exceeds a preset allowable interval, and the magnetic core magnetic flux difference value is within the preset allowable interval by adjusting the cross section area of the magnetic core;
the central processor records the initial number of coil turns adjusted using β j as N ', where j =1,2, setting N' = N0 × β j.
Further, in the process of adjusting the number of initial coil turns, when the number of initial coil turns is adjusted to N ' and the corresponding magnetic flux phi ' is smaller than the preset standard magnetic flux, the central control processor secondarily adjusts the number of initial coil turns according to delta phi b ', sets delta phi b ' = phi 0-phi ', and is provided with the maximum number of coil turns Nmax,
if N '< Nmax and phi' < phi 0, the central control processor carries out secondary adjustment on the number of turns of the initial coil;
if N '< Nmax and φ' > φ 0, the central control processor adjusts the initial energization current;
if N '> Nmax and phi' < phi 0, the central control processor adjusts the cross-sectional area of the magnetic core;
if N '> Nmax and phi' > phi 0, the central control processor judges that the magnetic core is qualified.
Further, when φ ' < φ 0, the central processor calculates a difference Δ φ c between φ ' and φ 0 and adjusts the initial cross-sectional area of the core to a corresponding value according to Δ φ c, sets Δ φ c = φ 0- φ ', the central processor is provided with a first predetermined magnetic flux difference Δ φ c1, a second predetermined magnetic flux difference Δ φ c2, a first predetermined cross-sectional area adjustment coefficient γ 1, and a second predetermined cross-sectional area adjustment coefficient γ 2, wherein Δ φ c1 <. Gamma 1 < γ 2 < 1.4,
if delta phi c is less than or equal to delta phi c1, the central control processor judges that the magnetic core is qualified;
if delta phi c1 is less than delta phi c and less than delta phi c2, the central control processor determines to adjust the initial cross-sectional area of the magnetic core by using gamma 1;
if delta phi c > [ delta phi c2 ], the central control processor determines to adjust the initial cross-sectional area of the magnetic core by using gamma 2;
the central processor records the cross-sectional area of the magnetic core adjusted by γ k as B ', wherein i =1,2, B' = B0 × γ k is set, and B0 is the initial cross-sectional area of the magnetic core.
Further, when the number of turns of the coil is still unqualified after the central control processor adjusts the number of turns of the initial coil of the magnetic core for the second time according to the delta phi b', the central control processor selects a corresponding correction coefficient according to the actual number of turns N to correct the adjusted cross-sectional area, the central control processor is provided with a first preset standard number of turns N1, a second preset standard number of turns N2, a first preset cross-sectional area correction coefficient epsilon 1 and a second preset cross-sectional area correction coefficient epsilon 2, wherein N1 is more than N2, epsilon 1 is more than 0 and less than epsilon 2 and less than 0.7,
if N is less than or equal to N1, the central control processor judges that the magnetic core is qualified;
if N1 is larger than N and is not larger than N2, the central control processor judges that epsilon 1 is used for correcting the adjusted cross sectional area;
if N is more than N2, the central control processor judges that epsilon 2 is used for correcting the adjusted cross-sectional area;
the central processor records the cross-sectional area of the core adjusted using ε m as B ", where m =1,2, and B" = B' × ε m is set.
Further, if the cross-sectional area of the magnetic core is still larger than the critical cross-sectional area after being corrected, the central control processor determines to replace the material of the magnetic core.
Compared with the prior art, the magnetic core manufacturing method has the advantages that for a single batch, the magnetic flux of the magnetic core is detected through the testing module, the magnetic core which does not meet the standard is debugged through the debugging module, the manufactured finished product can be effectively ensured to meet the requirements of users, and the manufacturing efficiency of the magnetic core is further improved; meanwhile, the preparation process of the magnetic core is adjusted according to the initial electrifying current, the cross-sectional area and the material of the magnetic core, so that the prepared finished product meets the requirements of users, the qualification rate of the prepared magnetic core is effectively ensured, defective products are avoided, and the preparation efficiency of the magnetic core is further improved.
Furthermore, the central control processor is provided with a preset magnetic flux phi 0, when the magnetic cores in a single batch are manufactured, the central control processor controls the test module to compare the detected actual magnetic flux phi of the magnetic cores with the preset magnetic flux, whether the magnetic flux of the magnetic cores meets the standard or not is judged, and whether the magnetic cores meet the requirement or not can be quickly judged through comparing the magnetic fluxes, so that the magnetic cores which do not meet the requirement are prevented from flowing into the market, and the preparation efficiency of the magnetic cores is further improved.
Furthermore, the central control processor is provided with a plurality of preset magnetic flux excess difference values and a plurality of preset current adjustment coefficients, when the magnetic core magnetic flux difference value exceeds a preset allowable interval, the central control processor determines whether the magnetic core magnetic flux difference value is within the preset allowable interval again by adjusting the initial electrifying current to the magnetic flux of the magnetic core, and the prepared finished product meets the requirements of users by debugging, so that the waste of resources is avoided, and the preparation efficiency of the magnetic core is further improved.
Further, the central control processor compares the regulated current I 'with a preset critical current Imin to judge whether the magnetic core is qualified or not, and if I' is less than Imin, the central control processor judges that the magnetic core is qualified; if I' is greater than Imin, the central control processor adjusts the magnetic core by adjusting initial electrifying current and initial coil turns, avoids damaging the testing device by setting critical parameters, and further improves the preparation efficiency of the magnetic core by considering whether the magnetic core can meet the requirements of users from the practical situation.
Furthermore, the central control processor is provided with a plurality of preset magnetic flux low difference values and a plurality of preset turn number adjusting coefficients, the central control processor adjusts the number of turns of the initial coil according to the magnetic flux difference value of the magnetic core, and the magnetic flux of the magnetic core meets the standard by adjusting the number of turns of the coil, so that the manufactured finished product can meet the requirements of users, the qualification rate of the manufactured finished product is effectively ensured, and the manufacturing efficiency of the magnetic core is further improved.
Furthermore, the central control processor is provided with a plurality of preset magnetic flux difference values and preset cross-sectional areas, and the central control processor adjusts the cross-sectional areas of the magnetic cores according to the magnetic flux difference values, so that the qualified rate of prepared finished products is effectively guaranteed, and the preparation efficiency of the magnetic cores is further improved.
Furthermore, when the cross-sectional area of the adjusted magnetic core is larger than the critical cross-sectional area, the manufactured magnetic core meets the requirements of users by considering the material of the replaced magnetic core, and the manufactured magnetic core is suitable for different occasions by considering the different magnetic conductivities of the magnetic cores made of different materials, so that the qualification rate of the manufactured finished product is effectively ensured, and the preparation efficiency of the magnetic core is further improved.
Drawings
FIG. 1 is a block diagram of a process for manufacturing a magnetic core for a magnetically coupled inductor according to an embodiment of the present invention;
FIG. 2 is a flow chart of a magnetic core fabrication process for a magnetically coupled inductor according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a test module according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a test module according to an embodiment of the invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a structural block diagram of a magnetic core manufacturing process for a magnetic coupling inductor according to an embodiment of the present invention, including:
the testing module is used for detecting the magnetic flux of the manufactured magnetic core and comprises a central control processor;
the central control processor is used for debugging the magnetic core which does not meet the standard through the debugging module according to the detection result of the testing module so as to enable the debugged magnetic core to meet the requirements of users;
referring to fig. 2, a flow chart of a magnetic core manufacturing process for a magnetic coupling inductor according to the present invention is shown, which includes:
step s1, preparing a simple substance Mn, a simple substance Ni, a simple substance Zn, a simple substance Fe and a simple substance C into blocks in sequence;
step s2, crushing the blocks into powder through ball milling, filling the powder into a cavity of a graphite mold, introducing current into two ends of the mold to fire the powder, and annealing after firing for a preset time to obtain a magnetic core;
step s3, placing the magnetic core into a testing module and testing the magnetic flux of the magnetic core by using a preset testing condition to judge whether the magnetic flux of the manufactured magnetic core meets the standard or not;
step s4, when preliminarily determining that the magnetic flux of the magnetic core does not meet the standard, the central control processor corrects the test condition of the test module for the magnetic core according to the magnetic flux of the magnetic core measured by the test module so as to further determine whether the actual magnetic flux of the magnetic core is within a preset allowable interval;
and step s5, after the central control processor finishes the test conditions of the test module for the magnetic cores, determining that the magnetic fluxes of the magnetic cores do not meet the standard, and before the central control processor carries out the manufacture of the magnetic cores of the next batch, selecting the dies with corresponding sizes according to the magnetic fluxes of the magnetic cores after the test conditions are adjusted to manufacture the magnetic cores with corresponding cross sections.
Specifically, in the step s3, a single prepared magnetic core is placed in a corresponding position in the test module to detect the magnetic flux Φ of the magnetic core, the test module includes an initial number N0 of turns of the coil and an initial energizing current I0 according to a preset test condition of the magnetic core, the central control processor is provided with a preset standard magnetic flux Φ 0,
if phi is larger than phi 0, the central control processor judges that the magnetic flux of the magnetic core does not meet the standard, calculates the difference value delta phi a between phi and phi 0, adjusts the initial electrifying current to a corresponding value according to the delta phi a, and sets delta phi a = phi-phi 0;
if phi = phi 0, the central control processor judges that the magnetic flux of the magnetic core meets the standard and judges that the preparation of the magnetic core is finished;
if phi is less than phi 0, the central control processor judges that the magnetic flux of the magnetic core does not meet the standard, calculates the difference value delta phi b between phi 0 and phi, adjusts the number of turns of the initial coil to a corresponding value according to the delta phi b, and sets delta phi b = phi 0-phi.
The central control processor is provided with a preset magnetic flux phi 0, when the magnetic cores of a single batch are manufactured, the central control processor controls the test module to compare the detected actual magnetic flux phi of the magnetic cores with the preset magnetic flux, whether the magnetic flux of the magnetic cores meets the standard or not is judged, whether the magnetic cores meet the requirements or not can be quickly judged by comparing the magnetic fluxes, accordingly, the phenomenon that the magnetic cores which do not meet the requirements flow into the market is avoided, and the preparation efficiency of the magnetic cores is further improved.
Specifically, when phi is larger than phi 0, the central control processor judges whether the magnetic flux difference value is in a preset interval according to the difference value delta phi a between phi and phi 0, the central control processor is provided with a preset magnetic flux difference value delta phi,
the central control processor is provided with a first preset magnetic flux excess difference delta phi a1, a second preset magnetic flux excess difference delta phi a2, a third preset magnetic flux excess difference delta phi a3, a first preset current regulating coefficient alpha 1 and a second preset current regulating coefficient alpha 2, wherein the delta phi a1 is smaller than the delta phi a2 to be smaller than the delta phi a3, the alpha 1 is larger than 0.8 to be smaller than the alpha 2 to be smaller than 1,
if the delta phi a is less than or equal to the delta phi a1, the central control processor judges that the magnetic flux difference value of the magnetic core is within a preset allowable interval;
if delta phi a1 is less than delta phi a and less than delta phi a2, the central control processor judges that alpha 2 is used for adjusting the initial electrifying current;
if delta phi a2 is less than delta phi a and less than delta phi a3, the central control processor judges that alpha 1 is used for adjusting the initial electrifying current;
if delta phi a > [ delta phi ] a3, the central control processor judges that the magnetic core magnetic flux difference value exceeds a preset allowable interval, and the magnetic core magnetic flux difference value is within the preset allowable interval by adjusting the cross section area of the magnetic core;
the central processor records the initial energization current adjusted with α I as I ', where I =1,2, and I' = I0 × α I is set.
The central control processor is provided with a plurality of preset magnetic flux excess difference values and a plurality of preset current adjusting coefficients, when the magnetic flux difference value of the magnetic core exceeds a preset allowable interval, the central control processor judges whether the magnetic flux difference value of the magnetic core is within the preset allowable interval again by adjusting the initial electrifying current, and the prepared finished product meets the requirement of a user by debugging, so that the waste of resources is avoided, and the preparation efficiency of the magnetic core is further improved.
Specifically, when the current is adjusted to I ' in the process of adjusting the initial electrifying current and the corresponding magnetic flux phi ' is higher than the preset standard magnetic flux at the moment, the central control processor carries out secondary adjustment on the initial electrifying current according to the delta phi a ', sets delta phi a ' = phi ' -phi 0, and is provided with a fourth preset magnetic flux excess difference delta phi a4, a fifth preset magnetic flux excess difference delta phi a5, a third preset current adjustment coefficient alpha 3 and a fourth preset current adjustment coefficient alpha 4, wherein the delta phi a4 is less than the delta phi a5,0.6 < alpha 1 < alpha 2 < 0.9,
if the delta phi a' is less than or equal to the delta phi a3, the central control processor judges that the magnetic flux difference value of the magnetic core is within a preset allowable interval;
if delta phi a3 is less than delta phi a' and less than delta phi a4, the central control processor determines to adjust the initial energization current by using alpha 4;
if delta phi a '>' delta phi a4, the central control processor determines to adjust the initial energization current by using alpha 3;
the central processor records the initial energization current adjusted using α I as I ″, where I =3,4, and I "= I0 × α I is set.
Specifically, the central control processor compares the regulated current I' with a preset critical current Imin to judge whether the magnetic core is qualified or not,
if I '< Imin and phi' < phi 0, the central control processor adjusts the number of initial coil turns;
if I '< Imin and phi' > phi 0, the central control processor judges that the magnetic core is qualified;
if I 'is greater than Imin and phi' is less than phi 0, the central control processor adjusts the number of turns of the initial coil;
if I 'is greater than Imin and phi' is greater than phi 0, the central processor secondarily adjusts the initial energization current.
The central control processor compares the regulated current I 'with a preset critical current Imin to judge whether the magnetic core is qualified or not, and if I' < Imin, the central control processor judges that the magnetic core is qualified; if I' is greater than Imin, the central control processor adjusts the magnetic core by adjusting initial electrifying current and initial coil turns, avoids damaging the testing device by setting critical parameters, and further improves the preparation efficiency of the magnetic core by considering whether the magnetic core can meet the requirements of users from the practical situation.
Please refer to fig. 3 and fig. 4, which are a schematic structural diagram of a test module according to an embodiment of the present invention and a cross-sectional view of the test module according to the embodiment of the present invention, respectively, wherein the test module includes:
an upper bracket 1 for fixing the magnetic core;
the lower bracket 2 corresponds to the upper bracket 1 and is used for fixing the magnetic core;
a test coil 3 wound around the core for testing a magnetic flux of the core;
a slide rail 4 provided at one side of the magnetic core to slide the slide probe 5;
and the sliding probe 5 is sleeved on the sliding rail 4 and used for adjusting the number of turns of the test coil 3.
When the central control processor determines that the number of turns of the test coil 3 needs to be adjusted to a corresponding value, the central control processor controls the sliding probe 5 to move on the sliding rail 4 so as to adjust the number of turns of the test coil 3.
Specifically, when phi is less than phi 0, the central control processor judges whether the magnetic flux difference value is in a preset interval according to the difference value delta phi b between phi and phi 0, the central control processor is provided with a first preset magnetic flux over-low difference value delta phi b1, a second preset magnetic flux over-low difference value delta phi b2, a third preset magnetic flux over-low difference value delta phi b3, a first preset number of turns regulating coefficient beta 1 and a second preset number of turns regulating coefficient beta 2, wherein delta phi b1 is less than delta phi b2 and less than delta phi b3,1 is less than beta 1 and less than beta 2 and less than 1.3,
if the delta phi b is less than or equal to the delta phi b1, the central control processor judges that the magnetic flux difference value of the magnetic core is within a preset allowable interval;
if delta phi b1 is less than delta phi b and less than delta phi b2, the central control processor adjusts the initial coil turns by using beta 1;
if delta phi b2 is less than delta phi b and less than delta phi b3, the central control processor adjusts the initial coil turns by using beta 2; if delta phi b > [ delta phi ] b3, the central control processor judges that the magnetic core magnetic flux difference value exceeds a preset allowable interval, and the magnetic core magnetic flux difference value is within the preset allowable interval by adjusting the cross section area of the magnetic core;
the central processor records the initial number of coil turns adjusted using β j as N ', where j =1,2, setting N' = N0 × β j.
The central control processor is provided with a plurality of preset magnetic flux over-low difference values and a plurality of preset turn number adjusting coefficients, the central control processor adjusts the number of turns of the initial coil according to the magnetic flux difference value of the magnetic core, and the number of turns of the coil is adjusted to enable the magnetic flux of the magnetic core to meet the standard, so that the manufactured finished product can meet the requirements of users, the qualification rate of the manufactured finished product is effectively guaranteed, and the manufacturing efficiency of the magnetic core is further improved.
Specifically, in the process of adjusting the number of initial coil turns, when the number of initial coil turns is adjusted to N ' and the corresponding magnetic flux phi ' is smaller than the preset standard magnetic flux, the central control processor performs secondary adjustment on the number of initial coil turns according to delta phi b ', sets delta phi b ' = phi 0-phi ', and is provided with the maximum number of coil turns Nmax,
if N '< Nmax and phi' < phi 0, the central control processor carries out secondary adjustment on the number of turns of the initial coil;
if N '< Nmax and φ' > φ 0, the central control processor adjusts the initial energization current;
if N '> Nmax and phi' < phi 0, the central control processor adjusts the cross-sectional area of the magnetic core;
if N 'is more than Nmax and phi' is more than phi 0, the central control processor judges that the magnetic core is qualified.
Specifically, when φ ' < φ 0, the central processor calculates a difference Δ φ c between φ ' and φ 0 and adjusts the initial cross-sectional area of the core to a corresponding value according to Δ φ c, sets Δ φ c = φ 0- φ ', and the central processor is provided with a first preset magnetic flux difference Δ φ c1, a second preset magnetic flux difference Δ φ c2, a first preset cross-sectional area adjustment coefficient γ 1, and a second preset cross-sectional area adjustment coefficient γ 2, wherein Δ φ c1 <. Gamma 1 < γ 2 < 1.4,
if delta phi c is less than or equal to delta phi c1, the central control processor judges that the magnetic core is qualified;
if delta phi c1 is less than delta phi c and less than delta phi c2, the central control processor determines to adjust the initial cross-sectional area of the magnetic core by using gamma 1;
if delta phi c > [ delta phi c2 ], the central control processor determines to adjust the initial cross-sectional area of the magnetic core by using gamma 2;
the central processor records the cross-sectional area of the magnetic core adjusted by γ k as B ', wherein i =1,2, B' = B0 × γ k is set, and B0 is the initial cross-sectional area of the magnetic core.
The central control processor is provided with a plurality of preset magnetic flux difference values and preset cross-sectional areas, and the central control processor adjusts the cross-sectional areas of the magnetic cores according to the magnetic flux difference values, so that the qualification rate of prepared finished products is effectively guaranteed, and the preparation efficiency of the magnetic cores is further improved.
Specifically, when the central control processor secondarily adjusts the number of turns of the initial coil of the magnetic core according to the number of turns delta phi b', the number of turns of the coil is still not qualified, the central control processor selects a corresponding correction coefficient according to the actual number of turns N to correct the adjusted cross-sectional area, the central control processor is provided with a first preset standard number of turns N1, a second preset standard number of turns N2, a first preset cross-sectional area correction coefficient epsilon 1 and a second preset cross-sectional area correction coefficient epsilon 2, wherein N1 is more than N2, epsilon 1 is more than 0 and less than epsilon 2 and less than 0.7,
if N is less than or equal to N1, the central control processor judges that the magnetic core is qualified;
if N1 is larger than N and is not larger than N2, the central control processor judges that the adjusted cross-sectional area is corrected by using epsilon 1;
if N is larger than N2, the central control processor judges that epsilon 2 is used for correcting the adjusted cross-sectional area;
the central processor records the cross-sectional area of the core adjusted using ε m as B ", where m =1,2, and B" = B' × ε m is set.
Specifically, if the cross-sectional area of the magnetic core is corrected to be larger than the critical cross-sectional area, the central control processor determines to replace the material of the magnetic core.
When the adjusted cross-sectional area of the magnetic core is larger than the critical cross-sectional area, the manufactured magnetic core meets the requirements of users by considering the material of the replaced magnetic core, and the manufactured magnetic core is suitable for different occasions by considering the different magnetic conductivities of the magnetic cores made of different materials, so that the manufactured magnetic core meets the requirements of the users, the qualification rate of the manufactured finished products is effectively ensured, and the preparation efficiency of the magnetic core is further improved.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is apparent to those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A process for preparing a magnetic core for a magnetically-coupled inductor, comprising:
step s1, preparing a simple substance Mn, a simple substance Ni, a simple substance Zn, a simple substance Fe and a simple substance C into a blocky substance in sequence;
step s2, crushing the blocks into powder through ball milling, filling the powder into a cavity of a graphite mold, introducing current into two ends of the mold to fire the powder, and annealing after firing for a preset time to obtain a magnetic core;
step s3, placing the magnetic core into a testing module and testing the magnetic flux of the magnetic core by using a preset testing condition to judge whether the magnetic flux of the manufactured magnetic core meets the standard or not;
step s4, when preliminarily judging that the magnetic flux of the magnetic core does not meet the standard, the central control processor corrects the test condition of the test module for the magnetic core according to the magnetic flux of the magnetic core measured by the test module so as to further judge whether the actual magnetic flux of the magnetic core is within a preset allowable interval;
and step s5, after the central control processor finishes the test conditions of the test module for the magnetic cores, determining that the magnetic fluxes of the magnetic cores do not meet the standard, and before the central control processor carries out the manufacture of the magnetic cores of the next batch, selecting the dies with corresponding sizes according to the magnetic fluxes of the magnetic cores after the test conditions are adjusted to manufacture the magnetic cores with corresponding cross sections.
2. A process for preparing a magnetic core for a magnetically-coupled inductor according to claim 1, wherein in step s3, a single prepared magnetic core is placed in a corresponding position in the test module to detect the magnetic flux φ of the magnetic core, the preset test conditions of the test module for the magnetic core include an initial number of turns N0 of the coil and an initial energizing current I0, the central processor is provided with a preset standard magnetic flux φ 0,
if phi is larger than phi 0, the central control processor judges that the magnetic flux of the magnetic core does not meet the standard, calculates the difference value delta phi a between phi and phi 0, adjusts the initial electrifying current to a corresponding value according to the delta phi a, and sets delta phi a = phi-phi 0;
if phi = phi 0, the central control processor judges that the magnetic flux of the magnetic core meets the standard and judges that the preparation of the magnetic core is finished;
if phi is less than phi 0, the central control processor judges that the magnetic flux of the magnetic core does not meet the standard, calculates the difference value delta phi b between phi 0 and phi, adjusts the number of turns of the initial coil to a corresponding value according to the delta phi b, and sets delta phi b = phi 0-phi.
3. The process of claim 2, wherein when φ > φ 0, the central processor determines whether the difference in magnetic flux is within a predetermined interval based on the difference Δ φ a between φ and φ 0, the central processor is configured with a predetermined difference in magnetic flux Δ φ,
the central control processor is provided with a first preset magnetic flux excess difference delta phi a1, a second preset magnetic flux excess difference delta phi a2, a third preset magnetic flux excess difference delta phi a3, a first preset current regulating coefficient alpha 1 and a second preset current regulating coefficient alpha 2, wherein the delta phi a1 is smaller than the delta phi a2 to be smaller than the delta phi a3, the alpha 1 is larger than 0.8 to be smaller than the alpha 2 to be smaller than 1,
if the delta phi a is less than or equal to the delta phi a1, the central control processor judges that the magnetic flux difference value of the magnetic core is within a preset allowable interval;
if delta phi a1 is less than delta phi a and less than delta phi a2, the central control processor judges that alpha 2 is used for adjusting the initial electrifying current;
if delta phi a2 is less than delta phi a and less than delta phi a3, the central control processor judges that alpha 1 is used for adjusting the initial electrifying current;
if delta phi a > [ delta phi ] a3, the central control processor judges that the magnetic core magnetic flux difference value exceeds a preset allowable interval, and the magnetic core magnetic flux difference value is within the preset allowable interval by adjusting the cross section area of the magnetic core;
the central processor records the initial energization current adjusted with α I as I ', where I =1,2, and I' = I0 × α I is set.
4. A process for the preparation of a magnetic core for a magnetically coupled inductor according to claim 3, wherein during the adjustment of the initial energization current, the current is adjusted to I ' and when the corresponding magnetic flux Φ ' is higher than the predetermined standard magnetic flux, the central processor performs a second adjustment of the initial energization current according to Δ Φ a ', sets Δ Φ a ' = Φ ' - Φ 0, and the central processor is provided with a fourth predetermined magnetic flux excess difference Δ Φ a4, a fifth predetermined magnetic flux excess difference Δ Φ a5, a third predetermined current adjustment factor α 3, and a fourth predetermined current adjustment factor α 4, wherein Δ Φ a4 < [ delta ] a5,0.6 < α 1 < α 2 < 0.9,
if the delta phi a' is less than or equal to delta phi a3, the central control processor judges that the magnetic flux difference value of the magnetic core is within a preset allowable interval;
if delta phi a3 is less than delta phi a' less than delta phi a4, the central processor determines to adjust the initial energization current using alpha 4;
if delta phi a '>' delta phi a4, the central control processor determines to adjust the initial energization current by using alpha 3;
the central processor records the initial energization current adjusted using α I as I ", where I =3,4, and I" = I0 × α I is set.
5. A process for preparing a magnetic core for a magnetically-coupled inductor according to claim 4, wherein the central processor compares the adjusted current I "with a predetermined critical current Imin to determine if the magnetic core is acceptable,
if I '< Imin and φ' < φ 0, the central control processor adjusts the initial number of coil turns;
if I '< Imin and phi' > phi 0, the central control processor judges that the magnetic core is qualified;
if I 'is greater than Imin and phi' is less than phi 0, the central control processor adjusts the number of turns of the initial coil;
if I 'is greater than Imin and phi' is greater than phi 0, the central processor secondarily adjusts the initial energization current.
6. The process of claim 5 for manufacturing a magnetic core for a magnetically coupled inductor, wherein when φ < φ 0, the central processor determines whether the difference between φ and φ 0, Δ φ b, is within a predetermined interval, and wherein the central processor is configured with a first predetermined flux under-run difference Δ φ b1, a second predetermined flux under-run difference Δ φ b2, a third predetermined flux under-run difference Δ φ b3, a first predetermined number of turns adjustment factor β 1, and a second predetermined number of turns adjustment factor β 2, wherein Δ φ b1 <. Δ φ b2 <. Δ b3,1 < β 2 < 1.3,
if the delta phi b is less than or equal to the delta phi b1, the central control processor judges that the magnetic flux difference value of the magnetic core is within a preset allowable interval;
if delta phi b1 is less than delta phi b and less than delta phi b2, the central control processor adjusts the initial coil turns by using beta 1;
if delta phi b2 is less than delta phi b and less than delta phi b3, the central control processor adjusts the initial coil turns by using beta 2; if delta phi b > -delta phi b3, the central control processor judges that the magnetic core magnetic flux difference value exceeds a preset allowable interval, and the magnetic core magnetic flux difference value is within the preset allowable interval by adjusting the cross sectional area of the magnetic core;
the central processor records the initial number of coil turns adjusted using β j as N ', where j =1,2, setting N' = N0 × β j.
7. The process of claim 6, wherein in the step of adjusting the number of initial turns, when the number of initial turns is adjusted to N ' and the corresponding magnetic flux φ ' is less than a predetermined standard magnetic flux, the central processor performs a secondary adjustment on the number of initial turns according to Δ φ b ', sets Δ φ b ' = φ 0- φ ', and sets a maximum number of turns Nmax in the central processor,
if N '< Nmax and phi' < phi 0, the central control processor carries out secondary adjustment on the number of turns of the initial coil;
if N '< Nmax and φ' > φ 0, the central control processor adjusts the initial energization current;
if N '> Nmax and phi' < phi 0, the central control processor adjusts the cross-sectional area of the magnetic core;
if N 'is more than Nmax and phi' is more than phi 0, the central control processor judges that the magnetic core is qualified.
8. Process for the preparation of magnetic cores for magnetically coupled inductors according to claim 7, characterised in that when φ ' < φ 0, the central processor calculates the difference Δ φ c between φ ' and φ 0 and adjusts the initial cross-sectional area of the core to a corresponding value according to Δ φ c, setting Δ φ c = φ 0- φ ', the central processor being provided with a first preset magnetic flux difference Δ φ c1, a second preset magnetic flux difference Δ φ c2, a first preset cross-sectional area adjustment factor γ 1 and a second preset cross-sectional area adjustment factor γ 2, wherein Δ c1 <. Delta φ c2,1 < γ 2 < 1.4,
if delta phi c is less than or equal to delta phi c1, the central control processor judges that the magnetic core is qualified;
if delta phi c1 is less than delta phi c and less than or equal to delta phi c2, the central control processor determines to adjust the initial cross-sectional area of the magnetic core by using gamma 1;
if delta phi c > -delta phi c2, the central control processor determines that the initial cross-sectional area of the magnetic core is adjusted by using gamma 2;
the central processor records the cross-sectional area of the magnetic core adjusted by γ k as B ', wherein i =1,2, B' = B0 × γ k is set, and B0 is the initial cross-sectional area of the magnetic core.
9. The process of claim 8, wherein when the central processor adjusts the number of initial turns of the core twice according to Δ φ b', the number of turns of the coil is still not acceptable, the central processor selects a corresponding correction factor according to the number of actual turns N to correct the adjusted cross-sectional area, the central processor is provided with a first predetermined number of standard turns N1, a second predetermined number of standard turns N2, a first predetermined cross-sectional area correction factor ε 1, and a second predetermined cross-sectional area correction factor ε 2, wherein N1 < N2,0 < ε 1 < ε 2 < 0.7,
if N is less than or equal to N1, the central control processor judges that the magnetic core is qualified;
if N1 is larger than N and is not larger than N2, the central control processor judges that the adjusted cross-sectional area is corrected by using epsilon 1;
if N is larger than N2, the central control processor judges that epsilon 2 is used for correcting the adjusted cross-sectional area;
the central processor records the cross-sectional area of the core adjusted using ε m as B ", where m =1,2, and B" = B' × ε m is set.
10. A process for preparing a magnetic core for a magnetically-coupled inductor according to claim 9, wherein the central processor determines to replace the material of the magnetic core if the cross-sectional area of the magnetic core is modified to be greater than a critical cross-sectional area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211405794.0A CN115602438B (en) | 2022-11-10 | 2022-11-10 | Magnetic core preparation process for magnetic coupling inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211405794.0A CN115602438B (en) | 2022-11-10 | 2022-11-10 | Magnetic core preparation process for magnetic coupling inductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115602438A true CN115602438A (en) | 2023-01-13 |
| CN115602438B CN115602438B (en) | 2023-06-20 |
Family
ID=84852057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211405794.0A Active CN115602438B (en) | 2022-11-10 | 2022-11-10 | Magnetic core preparation process for magnetic coupling inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115602438B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100248969A1 (en) * | 2007-01-11 | 2010-09-30 | Sumitomo Electric Industries, Ltd. | Oxide superconducting wire, superconducting structure, method of producing oxide superconducting wire, superconducting cable, superconducting magnet, and product incorporating superconducting magnet |
| US20100283456A1 (en) * | 2007-10-18 | 2010-11-11 | Nxp B.V. | Magnetic detection of back-side layer |
| CN102779639A (en) * | 2012-08-14 | 2012-11-14 | 安徽大学 | Method for preparing multi-pole anisotropic permanent magnet ring |
| US20140084914A1 (en) * | 2011-06-15 | 2014-03-27 | Autonetworks Technologies, Ltd. | Current detection device |
| US20140218012A1 (en) * | 2013-02-01 | 2014-08-07 | Denso Corporation | Detector of magnetic bias, magnetic saturation, or amount of magnetic flux |
| US20150210597A1 (en) * | 2012-10-18 | 2015-07-30 | Murata Manufacturing Co., Ltd. | Oxide ceramic and ceramic electronic component |
| JP2018080988A (en) * | 2016-11-16 | 2018-05-24 | Tdk株式会社 | Inductance element for magnetic sensor and magnetic sensor including the same |
| US20190246939A1 (en) * | 2016-01-27 | 2019-08-15 | Hitachi, Ltd. | Magnetic field adjustment device and magnetic resonance imaging device |
| US20200228038A1 (en) * | 2017-08-01 | 2020-07-16 | Denso Corporation | Rotary electric machine, rotary electric machine drive system, magnet, method of manufacturing magnet, magnetizing apparatus, and magnet unit |
| US20210350969A1 (en) * | 2020-05-09 | 2021-11-11 | Delta Electronics (Shanghai) Co., Ltd | Multi-phase coupled inductor and manufacturing method thereof |
-
2022
- 2022-11-10 CN CN202211405794.0A patent/CN115602438B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100248969A1 (en) * | 2007-01-11 | 2010-09-30 | Sumitomo Electric Industries, Ltd. | Oxide superconducting wire, superconducting structure, method of producing oxide superconducting wire, superconducting cable, superconducting magnet, and product incorporating superconducting magnet |
| US20100283456A1 (en) * | 2007-10-18 | 2010-11-11 | Nxp B.V. | Magnetic detection of back-side layer |
| US20140084914A1 (en) * | 2011-06-15 | 2014-03-27 | Autonetworks Technologies, Ltd. | Current detection device |
| CN102779639A (en) * | 2012-08-14 | 2012-11-14 | 安徽大学 | Method for preparing multi-pole anisotropic permanent magnet ring |
| US20150210597A1 (en) * | 2012-10-18 | 2015-07-30 | Murata Manufacturing Co., Ltd. | Oxide ceramic and ceramic electronic component |
| US20140218012A1 (en) * | 2013-02-01 | 2014-08-07 | Denso Corporation | Detector of magnetic bias, magnetic saturation, or amount of magnetic flux |
| US20190246939A1 (en) * | 2016-01-27 | 2019-08-15 | Hitachi, Ltd. | Magnetic field adjustment device and magnetic resonance imaging device |
| JP2018080988A (en) * | 2016-11-16 | 2018-05-24 | Tdk株式会社 | Inductance element for magnetic sensor and magnetic sensor including the same |
| US20200228038A1 (en) * | 2017-08-01 | 2020-07-16 | Denso Corporation | Rotary electric machine, rotary electric machine drive system, magnet, method of manufacturing magnet, magnetizing apparatus, and magnet unit |
| US20210350969A1 (en) * | 2020-05-09 | 2021-11-11 | Delta Electronics (Shanghai) Co., Ltd | Multi-phase coupled inductor and manufacturing method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 刘君昌: "高频低磁损恒磁通密度磁芯电感器的研制", 中国博士学位论文全文数据库 (基础科学辑), pages 042 - 72 * |
| 张勉团: "铁镍磁粉芯的制备工艺及磁性能研究", 中国优秀硕士学位论文全文数据库, pages 022 - 54 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115602438B (en) | 2023-06-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9007159B2 (en) | Coil-type electronic component | |
| EP2412831B1 (en) | Manufacturing method of grain oriented electrical steel sheet | |
| EP2805339B1 (en) | Three-phase magnetic cores for magnetic induction devices and methods for manufacturing them | |
| US7861403B2 (en) | Current transformer cores formed from magnetic iron-based alloy including final crystalline particles and method for producing same | |
| EP3441996A1 (en) | METHOD FOR PRODUCING Mn-Zn SYSTEM FERRITE MAGNETIC CORE, AND Mn-Zn SYSTEM FERRITE MAGNETIC CORE | |
| US20090231077A1 (en) | Inductor | |
| US20160155566A1 (en) | Soft magnetic core having excellent high-current dc bias characteristics and core loss characteristics and method of manufacturing same | |
| EP2482291A1 (en) | Magnetic powder material, low-loss composite magnetic material containing same, and magnetic element using same | |
| JP2005113169A (en) | Composite sintered magnetic material, its production method, and magnetic element obtained by using the composite sintered magnetic material | |
| WO2014116004A1 (en) | Method for manufacturing fe-based amorphous metal powder and method for manufacturing amorphous soft magnetic cores using same | |
| CN101080789A (en) | Nanocrystalline core for a current sensor, single and double-stage energy meters and current probes containing same | |
| JPWO2017164350A1 (en) | Manufacturing method of MnZn ferrite and MnZn ferrite | |
| US20110104476A1 (en) | Soft magnetic material, motor core, transformer core, and method for manufacturing soft magnetic material | |
| US9417292B1 (en) | Thermomagnetic temperature sensing | |
| CA2528582C (en) | Method for manufacturing a transformer winding | |
| EP0970257A1 (en) | Ferromagnetic amorphous metallic alloy and annealing method | |
| CN115602438A (en) | Magnetic core preparation process for magnetic coupling inductor | |
| JP2002299114A (en) | Dust core | |
| CN116313347B (en) | Composite material for preparing inductor, inductor and preparation method of inductor | |
| EP3605567A1 (en) | Terminal-attached dust core and method for manufacturing same | |
| Ziegler et al. | Influences of WPT-coil losses and coupling coefficient on the resonance circuits of wireless power transfer systems | |
| EP3588518B1 (en) | Magnetic core unit, current transformer, and methods for manufacturing same | |
| EP3597617B1 (en) | Ni-based ferrite sintered body, coil component, and method for manufacturing ni-based ferrite sintered body | |
| KR20210050857A (en) | Apparatus for measuring a ingot container and method of applying the same | |
| WO2019034967A1 (en) | Magnetic film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A magnetic core preparation process for magnetic coupled inductors Granted publication date: 20230620 Pledgee: Guangdong Qingxin Rural Commercial Bank Co.,Ltd. Taiping Branch Pledgor: Qingyuan Zhendong Electronic Technology Co.,Ltd. Registration number: Y2024980010526 |