CN1069823A - Production of amorphous magnetic core for magnetic-compensation Hall current sensor - Google Patents
Production of amorphous magnetic core for magnetic-compensation Hall current sensor Download PDFInfo
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- CN1069823A CN1069823A CN 91111757 CN91111757A CN1069823A CN 1069823 A CN1069823 A CN 1069823A CN 91111757 CN91111757 CN 91111757 CN 91111757 A CN91111757 A CN 91111757A CN 1069823 A CN1069823 A CN 1069823A
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Abstract
The present invention is used for the cutting magnetic core of magnetic compensation formula Hall current sensor.Composition of the present invention is that (wherein M is Mo or Mn to FczNiyMxSi7-10B12-15, x is 0-5, y is 0-40, z is 36-78), through special partially-crystallized annealing or transverse magnetic annealing, remanent magnetism is reduced and improve high frequency characteristics, adopt half flexible-epoxy to carry out package curing at last and cutting forms.Compare with traditional perm magnetic core, the significant advantage of amorphous magnetic core of the present invention is raw material and low cost of manufacture, is easy to make that good frequency characteristic and lower remanent magnetism and coercive force are arranged, and can improve the response time and the precision of transducer.
Description
The invention belongs to novel soft magnetic core, the high magnetic permeability 80Ni-Fe that replaces original tradition to use is a permalloy material magnetic core, have extremely low remanence strength, low-coercivity and better frequency characteristic, amorphous magnetic core of the present invention is specially adapted for the magnetic core in the magnetic compensation formula Hall current sensor.
Magnetic compensation formula Hall current sensor is a kind of high accuracy, noncontact, but the novel sensor of the various waveform electric currents of observing and controlling, and it is widely used in the emerging power electronic technology, and magnetic core is one of its two big critical component.Usually require magnetic core to have following characteristic: 1) low remanence strength Br; 2) low coercivity H; 3) good frequency characteristic; 4) high saturated magnetic strength Bs; 5) good manufacture craft performance.
What prior art adopted is the permalloy tape wound core that provides magnetic core to contain Ni80% by West Germany, and tape thickness is about 0.1mm.After annealing-dipping lacquer solidified, its magnetic levels was: Bs 0.8T, Br 0.24T, Hc 2.1A/m(0.026Oe), because band is thicker, high-gradient magnetism is relatively poor, this has limited the improvement of transducer response time, and its remanent magnetism Br and Hc are all bigger, has reduced the precision of transducer.In recent years along with the development of power electronic technology, the TT﹠C requirement of high frequency, non-sinusoidal waveform electric current is increased gradually.Therefore need a kind ofly have better frequency characteristic, lower remanent magnetism and coercitive cutting magnetic core to satisfy the requirement of novel sensor.
This transducer that sell the domestic and international market is produced by Switzerland LAM company, provides the perm magnetic core by West Germany entirely, does not find to use the patent and the report of non-crystaline amorphous metal magnetic core so far.See document [1] about the reported in literature of traditional sensors.
The objective of the invention is to replace traditional permalloy magnetic core, to improve the precision and the high frequency characteristics of transducer with amorphous magnetic core.In addition,, make the transducer amorphous magnetic core be easy to processing and fabricating, improve industrial manufacture process stability, reduce cost, make it to be applicable to production in enormous quantities by the adjustment of amorphous component and the improvement of technology.
Summary of the invention comprises:
The composition of non-crystaline amorphous metal be FezNiyMxSi7-10B12～15(wherein M be Mo or Mn, x is 0～5, y is 0～40, z is 36-78), this non-crystaline amorphous metal has good high-frequency soft magnetic performance and belt making process performance, under the annealing conditions of routine, can reach Hc＜1.6A/m Bs and reach 0.9T, the full magnetic hysteresis coefficient of dilatation 10 * 10 that closes
-6Resistivity is 1.35 μ Ω m.
The present invention adopts vacuum induction furnace smelting and casts bar-shaped mother metal, makes the amorphous band that requires width with single-roller method, is wound into annular or track-shaped magnetic core then.
The magnetic core of mentioned component can be undertaken by following two kinds of annealing processs:
A) partially-crystallized annealing is in nitrogen or argon protection gas, and annealing temperature is 410～450 ℃, is incubated 10～30 minutes, and air cooling can obtain high Bs and low Br and good high frequency characteristics.
B) horizontal magnetic anneal annealing temperature is 400～430 ℃, temperature retention time 10～30 minutes, and stove is cold.Magnetic field intensity is greater than 1600A/m.The purpose of horizontal magnetic anneal is in order to reduce Br and to improve frequency characteristic.
Magnetic core after the annealing is cured processing, can adopts encapsulating method, also can adopt the method for encapsulation.Use low stress half flexible-epoxy to pour into, its formula components is:
Kind allocation ratio (weight)
Epoxy resin 100
Curing agent (anhydrides etc.) 8～16
Increase sword agent (poly-S rubber etc.) 5～30
Extender (Si micro mist etc.) 30～50
Solidifying stoving process is 150 ℃, 3 hours
Magnetic core after solidifying is cut into the size of gaps of required size with emery wheel slicing machine or wire cutting machine, so that put into the Hall semiconductor device.Above technology can guarantee not produce resin cracks in cutting process, takes off between belt to split and defectives such as air gap distortion.
Reach advantage compared with the prior art:
Reach advantage compared with the prior art:
Now in magnetic and process aspect following difference is arranged with permalloy magnetic core and magnetic core of the present invention:
(1) now adopt the permalloy that contains Ni80% with magnetic core, the present invention adopts Fe-Ni base amorphous magnetic core.
(2) the present invention adopts process annealing (400～450 ℃), does not need coating, and the processing cycle is short, and not tight to the requirement of protection gas, technology is simple.And now with the perm magnetic core must adopt conventional insulation electrophoretic coating and high temperature often between annealing (1050 ℃ * 4hr), its annealing operation is very complicated.
(3) the present invention adopts epoxy resin enclosed curing, and now adopts dipping paint method with the perm magnetic core.Former approach can guarantee that soft magnet performance changes not quite after solidifying, and the latter then makes magnetic property descend greatly.For example concerning coercivity H, magnetic core of the present invention increases by 0～30% after solidifying, and now generally is increased to 400% with technology.
(4) dc magnetic of magnetic core before and after the cutting, both can do following comparison:
Table 1 is for solidifying the preceding magnetic core DC performance of back cutting relatively.Fig. 1 is then for cutting the contrast of back magnetic core magnetic hysteresis loop.(a) is magnetic core of the present invention among Fig. 1; (b) for now using the perm magnetic core.This shows that magnetic core of the present invention has the low advantage of Bs height, Br and Hc, and the linearity of curve is higher, is more suitable in Hall current sensor.
(5) about high frequency characteristics:
Under the state after curing before the cutting magnetic core of the present invention and existing perm magnetic core have been carried out frequency characteristic relatively, make electric bridge method, under Bm=5mT magnetic strength condition, measured of the variation of the elastic magnetic inductivity of two kinds of magnetic cores with operating frequency, the Dispersion of its magnetic permeability is shown in table 2, is begun obviously to descend from the 10KHz frequency by the visible traditional perm magnetic core of table.When 50KHz, magnetic permeability has been lower than 1000, only reduces by 18% and magnetic core of the present invention rises to the 150KHz magnetic permeability by 10KHz, and this magnetic core is particularly suitable for the observing and controlling to high-frequency current voltage.
Table 1: solidify the preceding magnetic core DC performance of back cutting relatively
| Now use perm Ni80 | The present invention | |
| Bs(T) | 0.8 | 0.9 |
| Br(T) | 0.24 | 0.07 |
| Hc(A/m) | 2.1 | 2.1 |
Table 2: the Dispersion that cuts the elastic magnetic inductivity of preceding two kinds of magnetic cores
| Frequency KHZ | 10 | 20 | 50 | 70 | 100 | 120 | 150 | 200 |
| Now use perm Ni80 | 2850 | 1670 | 876 | 694 | 548 | 492 | 417 | 〃 |
| Magnetic core of the present invention | 5104 | 5030 | 4087 | 4760 | 4560 | 4420 | 4190 | 3860 |
[example 1]
With the vacuum induction furnace smelting composition is the Fe38Ni38Mn2Si8B14 mother metal, adopts single-roller method to make the wide amorphous ribbon of 10mm, is wound into the magnetic core of φ 18/ φ 24 * 10mm.Carry out horizontal magnetic anneal, magnetic field intensity 1600A/m subsequently.Adopt 410 ℃, 10 minutes annealing back stoves cold, magnetic core with the epoxy resin enclosed overall dimension of making φ 15/ φ 26 * 11.5mm, is cut the wide gap of 1.8mm on the emery wheel slicing machine.Obtain the direct current magnetic hysteresis loop as shown in Figure 1.Its average magnetic permeability is 125, and the static magnetic field when reaching capacity is 40AT/cm.
Making specified measurement electric current with this magnetic core is 100A(50Hz) magnetic compensation formula Hall current sensor, the result shows, its certainty of measurement＜1%, measuring range expands to 0～150A, the response time is satisfied instructions for use less than 1 μ S.
[example 2]
Adopt the identical smelting system band method of example 1, making composition is the wide amorphous ribbon of 10mm of Fe77Si9B14, is wound into φ 18/ φ 24 * 10mm ring-shaped magnetic core.Subsequently after carrying out annealing in 430 ℃, 20 minutes under the Ar gas shiled; dc magnetic is: Bs=1.55T; Br=0.15T; Hc=7.96A/m; with magnetic core injection ring epoxy resins, baking and curing is handled back Bs=1.52T then, and its remanent magnetism Br and Hc change little; adopt the cutting of emery wheel slicing machine, width is the 1.7mm slit.The B100 of magnetic core is 1.45T behind the measurement otch, and average magnetic permeability is 180, is higher than 125 in the example 1.And, can enlarge current measuring range to 200A after making transducer because Bs is very high.
[annotating 1] quick male mulberry field of straight well is good bright, " ホ-Le sub-prime type high-precision current セ Application サ-" セ Application サ-technology.Vol.9.No.8（1989），48。
Claims (5)
1, soft magnetic amorphous magnetic core method for making, it is characterized in that chemical composition (weight %) is: (wherein M is Mo or Mn to FezNiyMxSi7-10B12-15, x is 0-5, and y is 0-40, and z is 36-78), adopt the bar-shaped mother metal of vacuum induction furnace smelting, make the amorphous band that requires width with single-roller method, coiled annular or track-shaped magnetic core carry out partially-crystallized annealing or horizontal magnetic anneal then, through the cured moulding, carry out the air gap cutting at last again.
2, method for making according to claim 1 is characterized in that partially-crystallized annealing process is: in nitrogen or argon shield, 410～450 ℃ of annealing temperatures are incubated 10～30 minutes, air cooling.
3, method for making according to claim 1 is characterized in that horizontal magnetic anneal technology is: 400～430 ℃ of annealing temperatures, and it is cold to be incubated 10～30 minutes stoves, and magnetic direction is along the band horizontal direction, and magnetic field intensity is greater than 1600A/m.
4, method for making according to claim 1 is characterized in that cured is to adopt encapsulating method, pours into half flexible-epoxy.
5, half flexible-epoxy according to claim 4 is characterized in that formula components meets following requirement:
Kind allocation ratio (weight)
Epoxy resin 100
Curing agent (anhydrides etc.) 8～16
Increase sword agent (polysulfide rubber etc.) 5～30
Filler (silicon powder etc.) 30～50
Solidifying stoving process is 150 ℃, 3 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91111757 CN1031848C (en) | 1991-12-29 | 1991-12-29 | Production of amorphous magnetic core for magnetic-compensation Hall current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91111757 CN1031848C (en) | 1991-12-29 | 1991-12-29 | Production of amorphous magnetic core for magnetic-compensation Hall current sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1069823A true CN1069823A (en) | 1993-03-10 |
| CN1031848C CN1031848C (en) | 1996-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91111757 Expired - Fee Related CN1031848C (en) | 1991-12-29 | 1991-12-29 | Production of amorphous magnetic core for magnetic-compensation Hall current sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN1031848C (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100490028C (en) * | 2005-12-07 | 2009-05-20 | 安泰科技股份有限公司 | Block-shaped soft magnetic alloy lamination element and its manufacturing method |
| CN102737829A (en) * | 2012-06-21 | 2012-10-17 | 四川大学苏州研究院 | Heat treatment process of low-loss amorphous alloy iron core for transformer |
| CN103258612A (en) * | 2013-05-22 | 2013-08-21 | 安泰科技股份有限公司 | Magnetic core of low conductive magnet, manufacturing method and application thereof |
| CN103969488A (en) * | 2013-01-31 | 2014-08-06 | 西门子公司 | Current transformer and current detection circuit thereof |
| CN104200982A (en) * | 2014-03-28 | 2014-12-10 | 北京冶科磁性材料有限公司 | Manufacturing method of nanocrystalline magnetic core for high-frequency electrostatic dust collection power transformer |
| CN105580095A (en) * | 2013-08-13 | 2016-05-11 | 日立金属株式会社 | Iron-based amorphous transformer core, production method therefor, and transformer |
| CN106916928A (en) * | 2015-12-24 | 2017-07-04 | 上海光线新材料科技有限公司 | A kind of amorphous or the heat treatment method of nanocrystalline material for magnetic screen piece |
| CN107190135A (en) * | 2017-06-02 | 2017-09-22 | 深圳市信维通信股份有限公司 | A kind of magnetic field heat treatment process of amorphous or nanocrystalline shielding piece |
| CN108329021A (en) * | 2017-12-25 | 2018-07-27 | 日照亿鑫电子材料有限公司 | Low-frequency current sensor core material and preparation method thereof |
| CN110160693A (en) * | 2019-07-08 | 2019-08-23 | 无锡集磁科技有限公司 | The measuring method of orientation silicon steel magnetic core resin solidification stress |
| CN111235495A (en) * | 2020-02-21 | 2020-06-05 | 中国电力科学研究院有限公司 | Amorphous nanocrystalline alloy, iron core and method for measuring wide-range current transformer |
-
1991
- 1991-12-29 CN CN 91111757 patent/CN1031848C/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100490028C (en) * | 2005-12-07 | 2009-05-20 | 安泰科技股份有限公司 | Block-shaped soft magnetic alloy lamination element and its manufacturing method |
| CN102737829A (en) * | 2012-06-21 | 2012-10-17 | 四川大学苏州研究院 | Heat treatment process of low-loss amorphous alloy iron core for transformer |
| CN103969488B (en) * | 2013-01-31 | 2017-09-29 | 西门子公司 | Current transformer and its current detection circuit |
| CN103969488A (en) * | 2013-01-31 | 2014-08-06 | 西门子公司 | Current transformer and current detection circuit thereof |
| CN103258612A (en) * | 2013-05-22 | 2013-08-21 | 安泰科技股份有限公司 | Magnetic core of low conductive magnet, manufacturing method and application thereof |
| CN105580095A (en) * | 2013-08-13 | 2016-05-11 | 日立金属株式会社 | Iron-based amorphous transformer core, production method therefor, and transformer |
| CN105580095B (en) * | 2013-08-13 | 2017-07-18 | 日立金属株式会社 | Fe bases amorphous transformer core and its manufacture method and transformer |
| CN104200982A (en) * | 2014-03-28 | 2014-12-10 | 北京冶科磁性材料有限公司 | Manufacturing method of nanocrystalline magnetic core for high-frequency electrostatic dust collection power transformer |
| CN106916928A (en) * | 2015-12-24 | 2017-07-04 | 上海光线新材料科技有限公司 | A kind of amorphous or the heat treatment method of nanocrystalline material for magnetic screen piece |
| CN107190135A (en) * | 2017-06-02 | 2017-09-22 | 深圳市信维通信股份有限公司 | A kind of magnetic field heat treatment process of amorphous or nanocrystalline shielding piece |
| CN108329021A (en) * | 2017-12-25 | 2018-07-27 | 日照亿鑫电子材料有限公司 | Low-frequency current sensor core material and preparation method thereof |
| CN110160693A (en) * | 2019-07-08 | 2019-08-23 | 无锡集磁科技有限公司 | The measuring method of orientation silicon steel magnetic core resin solidification stress |
| CN111235495A (en) * | 2020-02-21 | 2020-06-05 | 中国电力科学研究院有限公司 | Amorphous nanocrystalline alloy, iron core and method for measuring wide-range current transformer |
| CN111235495B (en) * | 2020-02-21 | 2022-10-04 | 中国电力科学研究院有限公司 | Amorphous nanocrystalline alloy, iron core manufacturing method and wide-range current transformer measuring method |
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| Publication number | Publication date |
|---|---|
| CN1031848C (en) | 1996-05-22 |
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Assignee: Beijing Shougang Co., Ltd. Assignor: Capital Iron & Steel General Company Contract fulfillment period: In May 5, 2017, 15 years, the patent expires Contract record no.: 200210042 Denomination of invention: Fabrication of amorphous magnetic core for magnetic compensated Holzer current sensor Granted publication date: 19960522 License type: Exclusive Record date: 20020603 |
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Free format text: LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2017.5.5, 15 YEARS, EXPIRATION OF PATENT RIGHT Name of requester: BEIJING SHOUDU STEEL CO., LTD. Effective date: 20020603 |
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