CN115602438B - Magnetic core preparation process for magnetic coupling inductor - Google Patents
Magnetic core preparation process for magnetic coupling inductor Download PDFInfo
- Publication number
- CN115602438B CN115602438B CN202211405794.0A CN202211405794A CN115602438B CN 115602438 B CN115602438 B CN 115602438B CN 202211405794 A CN202211405794 A CN 202211405794A CN 115602438 B CN115602438 B CN 115602438B
- Authority
- CN
- China
- Prior art keywords
- phi
- magnetic core
- central control
- control processor
- preset
- 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.)
- Active
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 230000008878 coupling Effects 0.000 title abstract description 5
- 238000010168 coupling process Methods 0.000 title abstract description 5
- 238000005859 coupling reaction Methods 0.000 title abstract description 5
- 230000004907 flux Effects 0.000 claims abstract description 141
- 238000012360 testing method Methods 0.000 claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 18
- 239000000126 substance Substances 0.000 claims abstract description 16
- 238000010304 firing Methods 0.000 claims abstract description 8
- 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
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 4
- 239000010439 graphite Substances 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 11
- 238000012937 correction Methods 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 238000012797 qualification Methods 0.000 description 7
- 229910002796 Si–Al Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification 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
- 238000001514 detection method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- -1 iron-silicon-aluminum Chemical compound 0.000 description 2
- 230000035699 permeability Effects 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
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 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
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Soft Magnetic Materials (AREA)
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 a simple substance Mn, ni, zn, fe and C into a block; crushing each block into powder through ball milling, filling the powder into a cavity of a graphite mold, firing the powder by introducing current into two ends of the mold, and annealing after the firing is performed for a preset time period to obtain a magnetic core; placing the magnetic core into a test module and testing the magnetic flux of the magnetic core by using preset test conditions; and the central control processor judges that the magnetic flux of the magnetic core still does not meet the standard after completing the test condition of the test module on the magnetic core, and before manufacturing the magnetic core of the next batch, the central control processor selects a mold with a corresponding size according to the magnetic flux of the magnetic core after adjusting the test condition so as to prepare 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 turns which are wound on an insulating framework or a magnetic core and an iron core by using enameled wires, gauze covered wires or plastic wires and the like and are connected in series, and the inductor 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, the magnetic core device is widely applied to various fields of life, along with the improvement of electronic technology, the requirement on the magnetic device is higher and higher, and the magnetic core device mainly develops in the directions of miniaturization and high frequency, which clearly requires higher requirements on magnetic loss and temperature rise performance. In order to optimize the performance of the sendust powder, the sendust powder is gradually prepared in the market by replacing the traditional crushing mode with an air atomization mode.
Chinese patent publication No.: CN110957096a discloses a ferro-silicon-aluminum magnetic core and its preparation process, the method comprises: smelting an ingot, and adding modified superfine SiC powder in the smelting process; preparing Fe-Si-Al powder; phosphating the surface of the prepared Fe-Si-Al powder: insulating and coating the phosphated Fe-Si-Al powder, and pressing the treated material into Fe-Si-Al magnetic core; annealing the pressed 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 objective, the present invention provides a magnetic core manufacturing process for a magnetically coupled inductor, which is used for overcoming the problem of low magnetic core manufacturing efficiency in the prior art.
The invention relates to a magnetic core preparation process for a magnetic coupling inductor, which is characterized by comprising the following steps:
step s1, sequentially preparing simple substance Mn, simple substance Ni, simple substance Zn, simple substance Fe and simple substance C into blocks;
step s2, crushing each block into powder through ball milling, filling the powder into a cavity of a graphite mold, firing the powder by introducing current into two ends of the mold, and annealing after firing for a preset time period to obtain a magnetic core;
step s3, placing the magnetic core into a test module and testing the magnetic flux of the magnetic core by using preset test conditions to determine whether the magnetic flux of the prepared magnetic core meets the standard;
step s4, when the central control processor preliminarily judges that the magnetic flux of the magnetic core does not meet the standard, correcting 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 in a preset allowable interval;
and step s5, after the test condition of the test module on the magnetic core is completed, the central control processor judges that the magnetic flux of the magnetic core still does not meet the standard, and before the next batch of magnetic cores are manufactured, the central control processor selects a mold with a corresponding size according to the magnetic flux of the magnetic core after the test condition is regulated so as to prepare the magnetic core with a corresponding cross section.
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 condition of the test module for the magnetic core comprises 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 > phi 0, the central control processor judges that the magnetic flux of the magnetic core does not meet the standard, calculates a difference delta phi a between phi and phi 0, and adjusts the initial energizing current to a corresponding value according to 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 < phi 0, the central control processor determines that the magnetic flux of the magnetic core does not meet a standard, calculates a difference delta phi b between phi 0 and phi, and adjusts the initial number of turns of the coil to a corresponding value according to delta phi b, setting delta phi b = phi 0-phi.
Further, when phi > phi 0, the central control processor judges whether the magnetic flux difference value is within a preset interval according to the difference value delta phi a between phi and phi 0, the central control processor is provided with the 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 adjustment coefficient alpha 1 and a second preset current adjustment coefficient alpha 2, wherein delta phi a1 < [ delta phi a2 ] <deltaphi a3, alpha 1 < alpha 2 < 1,
if delta phi a is less than or equal to delta phi a1, the central control processor judges that the magnetic core magnetic flux difference value is within a preset allowable interval;
if delta phi a1 is less than delta phi a2, the central control processor judges that alpha 2 is used for regulating the initial energizing current;
if delta phi a2 < deltaphi a is less than or equal to delta phi a3, the central control processor judges that alpha 1 is used for regulating the initial energizing current;
if delta phi a > -delta phi a3, the central control processor determines that the magnetic core magnetic flux difference value exceeds a preset allowable interval, and adjusts the cross-sectional area of the magnetic core to enable the magnetic core magnetic flux difference value to be in the preset allowable interval;
the central control processor marks the initial energizing current regulated by using alpha I as I ', wherein i=1, 2, and I' =I0×alpha 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 performs secondary adjustment on the initial electrifying current according to delta phi a ', delta phi a ' =phi ' -phi 0 is set, 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 are arranged in the central control processor, wherein delta phi a4 < [ delta phi a5 ], 0.6 < alpha 1 < alpha 2 < 0.9,
if delta phi a' is less than or equal to delta phi a3, the central control processor judges that the magnetic core magnetic flux difference value is within a preset allowable interval;
if delta phi a3 < deltaphi a' is less than or equal to delta phi a4, the central control processor determines to use alpha 4 to regulate the initial energizing current;
if ΔΦa' > ΔΦa4, the central control processor determines to adjust the initial energization current using α3;
the central control processor marks the initial energizing current regulated by using alpha I as I ', wherein i=3, 4, and I' =I0×alpha I is set.
Further, the central control processor compares the adjusted current I' with a preset critical current Imin to determine whether the magnetic core is qualified,
if I '< Imin and phi' < phi 0, the central control processor adjusts the initial coil turns;
if I '< Imin and phi' > phi 0, the central control processor judges that the magnetic core is qualified;
if I '> Imin and phi' < phi 0, the central control processor adjusts the initial coil turns;
if I '> Imin and phi' > phi 0, the central control processor secondarily adjusts the initial energizing current.
Further, when phi < phi 0, the central control processor judges whether the magnetic flux difference value is within a preset interval according to the difference delta phi b between phi and phi 0, the central control processor is provided with a first preset magnetic flux excessively low difference delta phi b1, a second preset magnetic flux excessively low difference delta phi b2, a third preset magnetic flux excessively low difference delta phi b3, a first preset turns regulating coefficient beta 1 and a second preset turns regulating coefficient beta 2, wherein delta phi b1 < [ delta phi b2 ] <deltaphi phi b3,1 < beta 2 < 1.3,
if delta phi b is less than or equal to delta phi b1, the central control processor judges that the magnetic core magnetic flux difference value is within a preset allowable interval;
if delta phi b1 < deltaphi b2 is less than or equal to delta phi b2, the central control processor uses beta 1 to adjust the initial coil turns;
if delta phi b2 < deltaphi b3 is less than or equal to delta phi b2, the central control processor uses beta 2 to adjust the initial coil turns; if delta phi b > -delta phi b3, the central control processor determines that the magnetic core magnetic flux difference value exceeds a preset allowable interval, and adjusts the cross-sectional area of the magnetic core to enable the magnetic core magnetic flux difference value to be in the preset allowable interval;
the central control processor marks the initial coil turn number adjusted by beta j as N ', wherein j=1, 2, and N' =N0×beta j is set.
Further, in the process of adjusting the initial coil turns, when the initial coil turns are 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 initial coil turns according to delta phi b ', delta phi b ' =phi 0-phi ' is set, the central control processor is provided with the maximum coil turns Nmax,
if N '< Nmax and phi' < phi 0, the central control processor performs secondary adjustment on the number of turns of the initial coil;
if N '< Nmax and phi' > phi 0, the central control processor adjusts the initial energizing 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 phi ' < phi 0, the central control processor calculates a difference Deltaphi c between phi ' and phi 0 and adjusts the initial cross-sectional area of the magnetic core to a corresponding value according to Deltaphi c, deltaphi c=phi 0-phi ' is set, the central control processor is provided with a first preset magnetic flux difference Deltaphi c1, a second preset magnetic flux difference Deltaphi c2, a first preset cross-sectional area adjustment coefficient gamma 1 and a second preset cross-sectional area adjustment coefficient gamma 2, wherein Deltaphi c1 < Deltaphic 2,1 < gamma 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 DeltaPhic 1 < DeltaPhicc is less than or equal to DeltaPhic 2, the central control processor judges that gamma 1 is used for adjusting the initial cross-sectional area of the magnetic core;
if Δφc > Δφc2, the central control processor determines to adjust the initial cross-sectional area of the core using γ2;
the central control processor marks the cross-sectional area of the magnetic core regulated by gamma k as B ', wherein i=1, 2, and B' =B0×gamma k is set as the initial cross-sectional area of the magnetic core.
Further, when the central control processor performs secondary adjustment on the initial coil turns of the magnetic core according to delta phi b', the coil turns are still unqualified, the central control processor selects a corresponding correction coefficient according to the actual turns N to correct the adjusted cross-sectional area, the central control processor is provided with a first preset standard turns N1, a second preset standard 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 smaller than N2, epsilon 1 is smaller than epsilon 2 and epsilon 2 is smaller 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 more than N and less than or equal to N2, the central control processor judges that epsilon 1 is used for correcting the regulated cross-sectional area;
if N is more than N2, the central control processor judges that epsilon 2 is used for correcting the regulated cross-sectional area;
the central control processor marks the cross-sectional area of the magnetic core adjusted by using epsilon m as B ', wherein m=1, 2, and B ' =B ' ×epsilon 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 flux detection device has the beneficial effects that for a single batch, the magnetic flux of the magnetic core is detected through the test module, and the magnetic core which does not meet the standard is debugged through the debugging module, so that the manufactured finished product can be effectively ensured to meet the requirements of users, and the preparation efficiency of the magnetic core is further improved; meanwhile, the preparation process of the magnetic core is adjusted from the initial electrifying current, the cross section 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, the occurrence of defective products is avoided, and the preparation efficiency of the magnetic core is further improved.
Further, the central control processor is provided with preset magnetic flux phi 0, when the manufacturing of the magnetic cores is completed in a single batch, the central control processor controls the testing module to compare the detected actual magnetic flux phi of the magnetic cores with the preset magnetic flux to judge whether the magnetic flux of the magnetic cores meets the standard or not, and whether the magnetic cores meet the requirements or not can be judged quickly by comparing the magnetic flux, so that the magnetic cores which do not meet the requirements are prevented from flowing into the market, and the preparation efficiency of the magnetic cores is further improved.
Further, 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 flux difference value of the magnetic core exceeds a preset allowable range, the central control processor can re-judge whether the magnetic flux difference value of the magnetic core is in the preset allowable range or not by adjusting the initial electrifying current, and the prepared finished product can meet the needs of users through 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 adjusted 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' > Imin, the central control processor adjusts the magnetic core by adjusting the initial electrifying current and the initial coil turns, and avoids damaging the testing device by setting critical parameters, and the preparation efficiency of the magnetic core is further improved by considering whether the magnetic core can meet the user requirement from the practical situation.
Further, the central control processor is provided with a plurality of preset magnetic flux excessively 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 prepared finished product can meet the requirements of users, the qualification rate of the prepared finished product is effectively ensured, and the preparation efficiency of the magnetic core is further improved.
Further, 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 ensured, and the preparation efficiency of the magnetic cores is further improved.
Further, when the cross-sectional area of the magnetic core after adjustment is larger than the critical cross-sectional area, the material of the magnetic core is replaced to enable the manufactured magnetic core to meet the requirements of users, the magnetic cores with different materials have different magnetic permeability and are suitable for different occasions, the material is replaced to enable the manufactured magnetic core to meet the requirements of the users, the qualification rate of manufactured finished products is effectively guaranteed, and the manufacturing efficiency of the magnetic core is further improved.
Drawings
FIG. 1 is a block diagram of a magnetic core fabrication process 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 structural 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 become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of 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 merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, 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 explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, a block diagram of a magnetic core manufacturing process for a magnetically coupled inductor according to an embodiment of the present invention includes:
the test 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 that the debugged magnetic core meets the requirements of users;
referring to fig. 2, a flowchart of a magnetic core manufacturing process for a magnetically coupled inductor according to the present invention is shown, where the magnetic core manufacturing process for a magnetically coupled inductor according to the present invention includes:
step s1, sequentially preparing simple substance Mn, simple substance Ni, simple substance Zn, simple substance Fe and simple substance C into blocks;
step s2, crushing each block into powder through ball milling, filling the powder into a cavity of a graphite mold, firing the powder by introducing current into two ends of the mold, and annealing after firing for a preset time period to obtain a magnetic core;
step s3, placing the magnetic core into a test module and testing the magnetic flux of the magnetic core by using preset test conditions to determine whether the magnetic flux of the prepared magnetic core meets the standard;
step s4, when the central control processor preliminarily judges that the magnetic flux of the magnetic core does not meet the standard, correcting 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 in a preset allowable interval;
and step s5, after the test condition of the test module on the magnetic core is completed, the central control processor judges that the magnetic flux of the magnetic core still does not meet the standard, and before the next batch of magnetic cores are manufactured, the central control processor selects a mold with a corresponding size according to the magnetic flux of the magnetic core after the test condition is regulated so as to prepare the magnetic core with a corresponding cross section.
Specifically, 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 condition of the test module for the magnetic core comprises 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 > phi 0, the central control processor judges that the magnetic flux of the magnetic core does not meet the standard, calculates a difference delta phi a between phi and phi 0, and adjusts the initial energizing current to a corresponding value according to 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 < phi 0, the central control processor determines that the magnetic flux of the magnetic core does not meet a standard, calculates a difference delta phi b between phi 0 and phi, and adjusts the initial number of turns of the coil to a corresponding value according to delta phi b, setting delta phi b = phi 0-phi.
The magnetic core manufacturing method comprises the steps that the central control processor is provided with preset magnetic flux phi 0, when manufacturing of single magnetic cores is completed in batches, the central control processor controls the testing module to compare the detected actual magnetic flux phi of the magnetic cores with the preset magnetic flux to judge whether the magnetic flux of the magnetic cores meets the standard, and whether the magnetic cores meet the requirements can be judged quickly by comparing the magnetic flux, so that the magnetic cores which do not meet the requirements are prevented from flowing into the market, and the manufacturing efficiency of the magnetic cores is further improved.
Specifically, when phi is more than phi 0, the central control processor judges whether the magnetic flux difference value is within a preset interval according to the difference value delta phi a between phi and phi 0, the central control processor is provided with the 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 adjustment coefficient alpha 1 and a second preset current adjustment coefficient alpha 2, wherein delta phi a1 < [ delta phi a2 ] <deltaphi a3, alpha 1 < alpha 2 < 1,
if delta phi a is less than or equal to delta phi a1, the central control processor judges that the magnetic core magnetic flux difference value is within a preset allowable interval;
if delta phi a1 is less than delta phi a2, the central control processor judges that alpha 2 is used for regulating the initial energizing current;
if delta phi a2 < deltaphi a is less than or equal to delta phi a3, the central control processor judges that alpha 1 is used for regulating the initial energizing current;
if delta phi a > -delta phi a3, the central control processor determines that the magnetic core magnetic flux difference value exceeds a preset allowable interval, and adjusts the cross-sectional area of the magnetic core to enable the magnetic core magnetic flux difference value to be in the preset allowable interval;
the central control processor marks the initial energizing current regulated by using alpha I as I ', wherein i=1, 2, and I' =I0×alpha 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 adjustment coefficients, when the magnetic flux difference values of the magnetic cores exceed a preset allowable range, the central control processor can re-judge whether the magnetic flux difference values of the magnetic cores are in the preset allowable range or not by adjusting the initial electrifying current, and the prepared finished product can meet the needs of users through debugging, so that the waste of resources is avoided, and the preparation efficiency of the magnetic cores is further improved.
Specifically, when the current is regulated to I ' and the corresponding magnetic flux phi ' is higher than the preset standard magnetic flux in the process of regulating the initial energizing current, the central control processor carries out secondary regulation on the initial energizing current according to delta phi a ', and is set with 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 regulation coefficient alpha 3 and a fourth preset current regulation coefficient alpha 4 are arranged in the central control processor, wherein delta phi a4 < [ delta phi a5 ], 0.6 < alpha 1 < alpha 2 < 0.9,
if delta phi a' is less than or equal to delta phi a3, the central control processor judges that the magnetic core magnetic flux difference value is within a preset allowable interval;
if delta phi a3 < deltaphi a' is less than or equal to delta phi a4, the central control processor determines to use alpha 4 to regulate the initial energizing current;
if ΔΦa' > ΔΦa4, the central control processor determines to adjust the initial energization current using α3;
the central control processor marks the initial energizing current regulated by using alpha I as I ', wherein i=3, 4, and I' =I0×alpha I is set.
Specifically, the central control processor compares the adjusted current I' with a preset critical current Imin to determine whether the magnetic core is qualified,
if I '< Imin and phi' < phi 0, the central control processor adjusts the initial coil turns;
if I '< Imin and phi' > phi 0, the central control processor judges that the magnetic core is qualified;
if I '> Imin and phi' < phi 0, the central control processor adjusts the initial coil turns;
if I '> Imin and phi' > phi 0, the central control processor secondarily adjusts the initial energizing 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' > Imin, the central control processor adjusts the magnetic core by adjusting the initial electrifying current and the initial coil turns, and avoids damaging the testing device by setting critical parameters, and the preparation efficiency of the magnetic core is further improved by considering whether the magnetic core can meet the user requirement from the practical situation.
Referring 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 an embodiment of the present invention, the test module includes:
an upper bracket 1 for fixing the magnetic core;
a lower bracket 2 corresponding to the upper bracket 1 for fixing the magnetic core;
a test coil 3 wound around the magnetic core for testing magnetic flux of the magnetic core;
a slide rail 4 provided at one side of the magnetic core for sliding the slide probe 5;
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 < phi 0, the central control processor judges whether the magnetic flux difference value is within a preset interval according to the difference delta phi b between phi and phi 0, the central control processor is provided with a first preset magnetic flux excessively low difference delta phi b1, a second preset magnetic flux excessively low difference delta phi b2, a third preset magnetic flux excessively low difference delta phi b3, a first preset turns regulating coefficient beta 1 and a second preset turns regulating coefficient beta 2, wherein delta phi b1 < [ delta phi b2 ] <deltaphi b3,1 < beta 2 < 1.3,
if delta phi b is less than or equal to delta phi b1, the central control processor judges that the magnetic core magnetic flux difference value is within a preset allowable interval;
if delta phi b1 < deltaphi b2 is less than or equal to delta phi b2, the central control processor uses beta 1 to adjust the initial coil turns;
if delta phi b2 < deltaphi b3 is less than or equal to delta phi b2, the central control processor uses beta 2 to adjust the initial coil turns; if delta phi b > -delta phi b3, the central control processor determines that the magnetic core magnetic flux difference value exceeds a preset allowable interval, and adjusts the cross-sectional area of the magnetic core to enable the magnetic core magnetic flux difference value to be in the preset allowable interval;
the central control processor marks the initial coil turn number adjusted by beta j as N ', wherein j=1, 2, and N' =N0×beta j is set.
The central control processor is provided with a plurality of preset magnetic flux excessively low difference values and a plurality of preset turns regulating coefficients, and the central control processor regulates 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 accords with the standard by regulating the number of turns of the coil, so that the prepared finished product can meet the requirements of users, the qualification rate of the prepared finished product is effectively ensured, and the preparation efficiency of the magnetic core is further improved.
Specifically, in the process of adjusting the initial coil turns, when the initial coil turns are 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 initial coil turns according to delta phi b ', the delta phi b ' is set to be phi 0-phi ', the central control processor is provided with the maximum coil turns Nmax,
if N '< Nmax and phi' < phi 0, the central control processor performs secondary adjustment on the number of turns of the initial coil;
if N '< Nmax and phi' > phi 0, the central control processor adjusts the initial energizing 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.
Specifically, when phi ' < phi 0, the central control processor calculates the difference delta phi c between phi ' and phi 0 and adjusts the initial cross-sectional area of the magnetic core to a corresponding value according to delta phi c, setting delta phi c=phi 0-phi ', setting a first preset magnetic flux difference delta phi c1, a second preset magnetic flux difference delta phi c2, a first preset cross-sectional area adjustment coefficient gamma 1 and a second preset cross-sectional area adjustment coefficient gamma 2, wherein delta phi c1 < [ delta ] phi c2,1 < gamma 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 DeltaPhic 1 < DeltaPhicc is less than or equal to DeltaPhic 2, the central control processor judges that gamma 1 is used for adjusting the initial cross-sectional area of the magnetic core;
if Δφc > Δφc2, the central control processor determines to adjust the initial cross-sectional area of the core using γ2;
the central control processor marks the cross-sectional area of the magnetic core regulated by gamma k as B ', wherein i=1, 2, and B' =B0×gamma k is set as 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 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 ensured, and the preparation efficiency of the magnetic cores is further improved.
Specifically, when the central control processor performs secondary adjustment on the initial coil turns of the magnetic core according to delta phi b', the coil turns are still unqualified, the central control processor selects a corresponding correction coefficient according to the actual turns N to correct the adjusted cross-sectional area, the central control processor is provided with a first preset standard turns N1, a second preset standard 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 smaller than N2,0 is smaller than epsilon 1 and epsilon 2 is smaller 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 more than N and less than or equal to N2, the central control processor judges that epsilon 1 is used for correcting the regulated cross-sectional area;
if N is more than N2, the central control processor judges that epsilon 2 is used for correcting the regulated cross-sectional area;
the central control processor marks the cross-sectional area of the magnetic core adjusted by using epsilon m as B ', wherein m=1, 2, and B ' =B ' ×epsilon m is set.
Specifically, 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.
When the cross section area of the magnetic core after adjustment is larger than the critical cross section area, the material of the magnetic core is replaced to enable the manufactured magnetic core to meet the requirements of users, the magnetic cores with different materials have different magnetic permeability, the magnetic core is applicable to different occasions, the material is replaced to enable the manufactured magnetic core to meet the requirements of the users, the qualification rate of manufactured finished products is effectively guaranteed, and the manufacturing efficiency of the magnetic core is further improved.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A process for preparing a magnetic core for a magnetically coupled inductor, comprising:
step s1, sequentially preparing simple substance Mn, simple substance Ni, simple substance Zn, simple substance Fe and simple substance C into blocks;
step s2, crushing each block into powder through ball milling, filling the powder into a cavity of a graphite mold, firing the powder by introducing current into two ends of the mold, and annealing after firing for a preset time period to obtain a magnetic core;
step s3, placing the magnetic core into a test module and testing the magnetic flux of the magnetic core by using preset test conditions to determine whether the magnetic flux of the prepared magnetic core meets the standard;
step s4, when the central control processor preliminarily judges that the magnetic flux of the magnetic core does not meet the standard, correcting 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 in a preset allowable interval;
step s5, the central control processor judges that the magnetic flux of the magnetic core still does not meet the standard after completing the test condition of the test module on the magnetic core, and before manufacturing the magnetic core of the next batch, the central control processor selects a mold with a corresponding size according to the magnetic flux of the magnetic core after adjusting the test condition so as to prepare the magnetic core with a corresponding cross section;
in said step s3, a single prepared magnetic core is placed in a corresponding position in said 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 number of turns N0 of the coil and an initial energizing current I0, said central control processor is provided with a preset standard magnetic flux phi 0,
if phi > phi 0, the central control processor judges that the magnetic flux of the magnetic core does not meet the standard, calculates a difference delta phi a between phi and phi 0, and adjusts the initial energizing current to a corresponding value according to 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 < phi 0, the central control processor determines that the magnetic flux of the magnetic core does not meet the standard, calculates the difference delta phi b between phi 0 and phi, and adjusts the initial coil number of turns to a corresponding value according to delta phi b, setting delta phi b = phi 0-phi.
2. The process for manufacturing a magnetic core for a magnetically coupled inductor according to claim 1, wherein when phi > phi 0, the central control processor determines whether the magnetic flux difference is within a preset interval based on a difference Δphia between phi and phi 0, the central control processor is provided with a preset magnetic flux difference Δphi,
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 adjustment coefficient alpha 1 and a second preset current adjustment coefficient alpha 2, wherein delta phi a1 < [ delta phi a2 ] <deltaphi a3, alpha 1 < alpha 2 < 1,
if delta phi a is less than or equal to delta phi a1, the central control processor judges that the magnetic core magnetic flux difference value is within a preset allowable interval;
if delta phi a1 is less than delta phi a2, the central control processor judges that alpha 2 is used for regulating the initial energizing current;
if delta phi a2 < deltaphi a is less than or equal to delta phi a3, the central control processor judges that alpha 1 is used for regulating the initial energizing current;
if delta phi a > -delta phi a3, the central control processor judges that the magnetic flux difference value of the magnetic core exceeds a preset allowable interval, and the magnetic flux difference value of the magnetic core is in the preset allowable interval by adjusting the cross section area of the magnetic core;
the central control processor marks the initial energizing current regulated by using alpha I as I ', wherein i=1, 2, and I' =I0×alpha I is set.
3. The process for preparing a magnetic core for a magnetically coupled inductor according to claim 2, wherein the central control processor performs a secondary adjustment of the initial energization current according to ΔΦa ' when the current is adjusted to I ' and the corresponding magnetic flux Φ ' is higher than a preset standard magnetic flux in the course of adjusting the initial energization current, a fourth preset magnetic flux excess difference ΔΦa4, a fifth preset magnetic flux excess difference ΔΦa5, a third preset current adjustment coefficient α3 and a fourth preset current adjustment coefficient α4 are provided in the central control processor, wherein ΔΦa4 < ΔΦa5,0.6 < α1 < α2 < 0.9,
if delta phi a' is less than or equal to delta phi a3, the central control processor judges that the magnetic core magnetic flux difference value is within a preset allowable interval;
if delta phi a3 < deltaphi a' is less than or equal to delta phi a4, the central control processor determines to use alpha 4 to regulate the initial energizing current;
if ΔΦa' > ΔΦa4, the central control processor determines to adjust the initial energization current using α3;
the central control processor marks the initial energizing current regulated by using alpha I as I ', wherein i=3, 4, and I' =I0×alpha I is set.
4. The process for manufacturing a magnetic core for a magnetically coupled inductor according to claim 3, wherein the central control processor compares the adjusted current I' with a preset critical current Imin to determine whether the magnetic core is acceptable,
if I '< Imin and phi' < phi 0, the central control processor adjusts the initial coil turns;
if I '< Imin and phi' > phi 0, the central control processor judges that the magnetic core is qualified;
if I '> Imin and phi' < phi 0, the central control processor adjusts the initial coil turns;
if I '> Imin and phi' > phi 0, the central control processor secondarily adjusts the initial energizing current.
5. The process for preparing a magnetic core for a magnetically coupled inductor according to claim 4, wherein when phi < phi 0, the central control processor determines whether the magnetic flux difference is within a preset interval based on a difference delta phi b between phi and phi 0, wherein the central control processor is provided with a first preset magnetic flux excessively low difference delta phi b1, a second preset magnetic flux excessively low difference delta phi b2, a third preset magnetic flux excessively low difference delta phi b3, a first preset turns adjustment coefficient beta 1 and a second preset turns adjustment coefficient beta 2, wherein delta phi b1 < [ delta phi b2 ] <deltaphi b3,1 < beta 2 < 1.3,
if delta phi b is less than or equal to delta phi b1, the central control processor judges that the magnetic core magnetic flux difference value is within a preset allowable interval;
if delta phi b1 < deltaphi b2 is less than or equal to delta phi b2, the central control processor uses beta 1 to adjust the initial coil turns;
if delta phi b2 < deltaphi b3 is less than or equal to delta phi b2, the central control processor uses beta 2 to adjust the initial coil turns; 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 in the preset allowable interval by adjusting the cross section area of the magnetic core;
the central control processor marks the initial coil turn number adjusted by beta j as N ', wherein j=1, 2, and N' =N0×beta j is set.
6. The process for preparing a magnetic core for a magnetically coupled inductor according to claim 5, wherein the central control processor adjusts the initial coil turns to N ' and the corresponding magnetic flux Φ ' is smaller than a preset standard magnetic flux during the adjustment of the initial coil turns, the central control processor adjusts the initial coil turns twice according to ΔΦb ', a maximum coil turns Nmax is set in the central control processor,
if N '< Nmax and phi' < phi 0, the central control processor performs secondary adjustment on the number of turns of the initial coil;
if N '< Nmax and phi' > phi 0, the central control processor adjusts the initial energizing 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.
7. The process for preparing a magnetic core for a magnetically coupled inductor according to claim 6, wherein when Φ ' < Φ0, the central control processor calculates a difference ΔΦc between Φ ' and Φ0 and adjusts an initial cross-sectional area of the magnetic core to a corresponding value according to ΔΦc, ΔΦc=Φ0- Φ ' is set, the central control processor is provided with a first preset magnetic flux difference ΔΦc1, a second preset magnetic flux difference ΔΦc2, a first preset cross-sectional area adjustment coefficient γ1, and a second preset cross-sectional area adjustment coefficient γ2, wherein ΔΦc1 < ΔΦc2,1 < γ1 < γ2 < 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 DeltaPhic 1 < DeltaPhicc is less than or equal to DeltaPhic 2, the central control processor judges that gamma 1 is used for adjusting the initial cross-sectional area of the magnetic core;
if Δφc > Δφc2, the central control processor determines to adjust the initial cross-sectional area of the core using γ2;
the central control processor marks the cross-sectional area of the magnetic core regulated by gamma k as B ', wherein i=1, 2, and B' =B0×gamma k is set as the initial cross-sectional area of the magnetic core.
8. The process for preparing a magnetic core for a magnetically coupled inductor according to claim 7, wherein when the central control processor performs secondary adjustment of the initial number of turns of the magnetic core according to ΔΦb' and then the number of turns of the coil is not qualified, the central control processor selects a corresponding correction factor 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 factor ε 1 and a second preset 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 more than N and less than or equal to N2, the central control processor judges that epsilon 1 is used for correcting the regulated cross-sectional area;
if N is more than N2, the central control processor judges that epsilon 2 is used for correcting the regulated cross-sectional area;
the central control processor marks the cross-sectional area of the magnetic core adjusted by using epsilon m as B ', wherein m=1, 2, and B ' =B ' ×epsilon m is set.
9. The process of claim 8, wherein the central processor determines to replace the material of the core if the cross-sectional area of the core is still greater than a critical cross-sectional area after the correction.
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 CN115602438A (en) | 2023-01-13 |
| CN115602438B true 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102779639A (en) * | 2012-08-14 | 2012-11-14 | 安徽大学 | Method for preparing multi-pole anisotropic permanent magnet ring |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008065781A1 (en) * | 2007-01-11 | 2008-06-05 | Sumitomo Electric Industries, Ltd. | Oxide superconducting wire rod, superconducting structure, method for manufacturing oxide superconducting wire rod, superconducting cable, superconducting magnet, and product comprising superconducting magnet |
| EP2203936A2 (en) * | 2007-10-18 | 2010-07-07 | Nxp B.V. | Magnetic detection of back-side layer |
| JP5724660B2 (en) * | 2011-06-15 | 2015-05-27 | 株式会社オートネットワーク技術研究所 | Current detector |
| JP5884917B2 (en) * | 2012-10-18 | 2016-03-15 | 株式会社村田製作所 | Oxide ceramics and ceramic electronic parts |
| JP5783191B2 (en) * | 2013-02-01 | 2015-09-24 | 株式会社デンソー | Device for detecting bias, magnetic saturation, or magnetic flux |
| JP6643110B2 (en) * | 2016-01-27 | 2020-02-12 | 株式会社日立製作所 | Magnetic field adjustment device and magnetic resonance imaging device |
| JP6520896B2 (en) * | 2016-11-16 | 2019-05-29 | Tdk株式会社 | Inductance element for magnetic sensor and magnetic sensor comprising the same |
| WO2019026979A1 (en) * | 2017-08-01 | 2019-02-07 | 株式会社デンソー | Rotary electric machine, rotary electric machine drive system, magnet, method for manufacturing magnet, magnetization device, and magnet unit |
| CN113628853B (en) * | 2020-05-09 | 2023-06-16 | 台达电子企业管理（上海）有限公司 | Multiphase coupling inductor and manufacturing method thereof |
-
2022
- 2022-11-10 CN CN202211405794.0A patent/CN115602438B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102779639A (en) * | 2012-08-14 | 2012-11-14 | 安徽大学 | Method for preparing multi-pole anisotropic permanent magnet ring |
Non-Patent Citations (1)
| Title |
|---|
| 高频低磁损恒磁通密度磁芯电感器的研制;刘君昌;中国博士学位论文全文数据库 (基础科学辑);C042-72 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115602438A (en) | 2023-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3441996A1 (en) | METHOD FOR PRODUCING Mn-Zn SYSTEM FERRITE MAGNETIC CORE, AND Mn-Zn SYSTEM FERRITE MAGNETIC CORE | |
| JP6517139B2 (en) | Soft magnetic core with position dependent permeability | |
| CN101080789A (en) | Nanocrystalline core for a current sensor, single and double-stage energy meters and current probes containing same | |
| CN109884564B (en) | Method and device for measuring magnetic characteristics of transformer magnetic core | |
| CN115602438B (en) | Magnetic core preparation process for magnetic coupling inductor | |
| JPWO2017164350A1 (en) | Manufacturing method of MnZn ferrite and MnZn ferrite | |
| JP6024831B2 (en) | Method for producing Fe-based nanocrystalline alloy and method for producing Fe-based nanocrystalline alloy magnetic core | |
| CA2528582C (en) | Method for manufacturing a transformer winding | |
| CN111235495B (en) | Amorphous nanocrystalline alloy, iron core manufacturing method and wide-range current transformer measuring method | |
| CN110494408B (en) | MnZn-based ferrite sintered body | |
| CA2279981A1 (en) | Ferromagnetic amorphous metallic alloy and annealing method | |
| JPH118110A (en) | Heat-treating method of soft magnetic body in magnetic field | |
| CN115191670A (en) | Composite induction heating receptor and preparation method and application thereof | |
| EP3821989A1 (en) | Online automation measurement system for claw-pole overall magnetic property | |
| CN102136336B (en) | Method for compensating heterogeneity of magnetic field coil by shunting | |
| CN112802653A (en) | Magnetizing and demagnetizing method, magnetizing and demagnetizing magnetic head and magnetizing and demagnetizing machine | |
| CN109271718B (en) | Design method of spiral inductor wound on tubular magnetic core | |
| Liu et al. | Pulse magnetic properties measurement and characterization of Fe-based nanocrystalline cores for high-voltage pulse magnetics applications | |
| EP3597617A1 (en) | Ni-based ferrite sintered body, coil component, and method for manufacturing ni-based ferrite sintered body | |
| Ziegler et al. | Influences of WPT-coil losses and coupling coefficient on the resonance circuits of wireless power transfer systems | |
| KR20210050857A (en) | Apparatus for measuring a ingot container and method of applying the same | |
| CN106526302A (en) | Method for manufacturing high-performance air-core coil with balanced turns | |
| CN108597839B (en) | Manufacturing method of miniature inductor | |
| KR100904664B1 (en) | Magnetic core for electric current sensors | |
| CN115132478A (en) | Manufacturing process of laminated magnetic core |
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 | ||
| 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 |