CN101488389A - Production method for novel magnetic core - Google Patents
Production method for novel magnetic core Download PDFInfo
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- CN101488389A CN101488389A CNA2008100011602A CN200810001160A CN101488389A CN 101488389 A CN101488389 A CN 101488389A CN A2008100011602 A CNA2008100011602 A CN A2008100011602A CN 200810001160 A CN200810001160 A CN 200810001160A CN 101488389 A CN101488389 A CN 101488389A
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Abstract
The invention provides a manufacturing method for a new magnetic core, which belongs to the powder metallurgy technology, in particular to a soft magnetic core suitable for being used in alternative electric field between 100-200Hz. The invention has the following advantages that 1.saturation induction density is higher and can be controlled within 8000-14000 gauss; 2. loss is much lower, compared with non-oriented silicon-steel plate with the thickness of 0.5mm under 400Hz, iron loss is reduced by about 70%; compared with non-oriented silicon-steel plate with the thickness of 0.35mm under 400Hz, iron loss is reduced by about 50%; when the product is compared with ferrite and ferrous powder core under 400Hz, the iron loss of the product is close to ferrite and is much less than that of ferrous powder; 3. higher temperature resistance, the temperature can reach 800 DEG C; 4. deformation degree in the sintering process is little; 5. the soft magnetic core is machinable, and can be processed by wire-electrode cutting, cutting, rubbing, etc.
Description
Technical field
The invention belongs to powder metallurgy technology, a kind of manufacture method of novel iron core is provided, be particularly suitable for a kind of novel magnetic core that in 100～2000 hertz AC field, uses.
Background technology
If the iron core that uses in DC electric field should select electrician's iron for better; In the frequency of alternating current is that should to select silicon steel sheet serve as better to 60 hertz of iron cores that use in interior place; Frequency at alternating current is that the iron core that uses in the place below 100000 hertz more than 10000 hertz should select ferrocart core, iron sial for better; Frequency at alternating current is that the iron core that use in the place more than 100000 hertz should select damp ferrite for better.
The present invention faces the high-speed motor that need do 100～2000 hertz of scopes.
Thickness be the saturation induction density of 0.5 millimeter or 0.35 millimeter non-oriented silicon steel sheet up to 16800 Gausses, the situation of iron loss is not bad frequently the time in public affairs, when frequency rose to 400 hertz, their iron loss rose doubly a lot of.
The saturation induction density of ferrocart core generally is about 9000～11000 Gausses, and iron loss is very big in 100～2000 hertz alternating electric field, and on the other hand, heatproof is generally at 125～200 degrees centigrade.If, make motor stator with it, run into wire-wound group fault, because crossing low, heatproof can not keep in repair regeneration, so can not adopt it.
If, make the high-speed motor of 100～2000 hertz of scopes with silicon steel sheet or ferrocart core, a lot of a part of energy consumes on iron loss during motor work.
The situation of iron sial is such, and its saturation induction density generally is about 5000～9000 Gausses, and iron loss is also lower, but its material mechanical strength is low excessively, so can not adopt.
Ferritic saturation induction density is about 2700～4200 Gausses, and the iron loss situation is quite good, and, first shortcoming is, its saturation induction density is too low, makees high-speed motor with it, and volume is too huge; Second shortcoming is that it is out of shape more serious in sintering process; The 3rd shortcoming is that not energy line cutting should not be cut etc.
Summary of the invention
Purpose of the present invention is particularly suitable for a kind of novel magnetic core of using in the alternating electric field between 100～2000 hertz in order to provide, and it has following several advantage.
1. saturation induction density is higher, can be controlled at 8000～14000 Gausses;
2. loss is lower.Under 400 hertz situation, be that 0.5 millimeter non-oriented silicon steel sheet is compared, reduce iron loss about 70% with thickness.Under 400 hertz situation, be that 0.35 millimeter non-oriented silicon steel sheet is compared, reduce iron loss about 50% with thickness.This product is compared with ferrite, ferrocart core under 400 hertz situation, and the iron loss degree approaches ferrite, and is little more a lot of than ferrocart core loss;
3. heatproof is higher, and low temperature type magnetic core can reach 500 degrees centigrade; The high temperature type magnetic core can reach 800 degrees centigrade;
4. deformation extent is small in the sintering process;
5. but machine work can the line cutting, cutting, grinding etc.
The present invention realizes like this
First step
1.-100～-300 purpose straight iron powders 75～90wt%; 2. particle diameter is brown iron oxide 7～26wt% of 0.75～2 micron; 3.-100～-200 purpose boron oxides or borax 2～8wt%; 4. the zinc stearate of demoulding effect or calcium stearate are-200～-300 purpose 0.25～0.49wt%.Above raw material is placed in the mixer stirs.
Second step
Utilize mould with 8～23 tons/square centimeter pressure compression moulding.
Third step
One, under the common environment, in 60～200 minutes, heats up gradually, be warming up to 400～950 degrees centigrade, kept 20～180 minutes, then natural cooling.
Two, also can in 30～200 minutes, heat up gradually in the environment of inert atmosphere protection or vacuum, sintering temperature is controlled between 400～950 degrees centigrade, keeping the time of temperature is 20～250 minutes, then natural cooling.
The 4th step
Through surface treatment, remove moisture, preheating, the oil spout lacquer, oven dry, screening through detecting, finally becomes finished product.
The 5th step
When making motor stator with magnetic core of the present invention, the thickness of every stator core can be designed to 5～60 millimeters, is superimposed as the stator of adequate thickness.If, when the pressure of hydraulic forming machine is big inadequately, can make 1/2,1/3 or 1/6 for every, be combined into roundly then, be superimposed as the motor stator of adequate thickness again.
The invention effect
One, the present invention is a kind of novel magnetic core, compares with ferrite: 1. the shortcoming that has overcome ferrite sintered time distortion; 2. improved ferrite can not line cutting, should not cut, unsuitable mach disadvantage; 3. utilize this product in 100～2000 hertz alternating electric field, to use, compare with ferrite, volume can be contracted to 1/2 or 1/3, so not only just have ready conditions and to dwindle to amplitude peak the overall design volume that makes electronics or electric equipment products fully, and the cost of the cost that can save a lot of magnetic cores and expensive electromagnetic wire, also can realize lightweight.
Two, magnetic core of the present invention is compared with the iron sial: 1. can reduced volume be 1/2; 2. the mechanical strength of iron sial is like alike with common brick.Magnetic core of the present invention, mechanical strength and cast iron are alike, and magnetic core of the present invention has strengthened mechanical strength significantly.
Three, magnetic core of the present invention is compared with ferrocart core: 1. the heatproof of ferrocart core is 125～200 degrees centigrade, and magnetic core heatproof of the present invention is 500～800 degrees centigrade.Magnetic core of the present invention has increased substantially heatproof, makes product add former electromagnetic wire and burns after keep in repair reproducible ability; 2. can reduced volume be 10%～20%; 3. save a large amount of electric energy.When in 400 hertz alternating electric field, using, compare, can reduce iron loss about 70% with ferrocart core.
Four, the thickness that uses on magnetic core of the present invention and the energy-saving motor is that 0.5 millimeter silicon steel sheet is compared, and when using in 400 hertz alternating electric field, reduces iron loss about 70%.When improving frequency of utilization, the efficient of saves energy is more remarkable.
Five, the thickness that uses on magnetic core of the present invention and the energy-saving motor is that 0.35 millimeter silicon steel sheet is compared, and when using in 400 hertz alternating electric field, reduces iron loss about 50%.When improving frequency of utilization, fractional energy savings is more remarkable.
Claims (7)
1. the manufacture method of a magnetic core is counted by weight percentage, iron powder 75～90wt%; Brown iron oxide 10～20wt%; Borax 2～8wt%; The ratio of release agent 0.25～0.45wt% is prepared burden.
2. the manufacture method of a magnetic core is counted by weight percentage, iron powder 75～90wt%; Brown iron oxide 10～20wt%; Boron oxide 2～8wt%; The ratio of release agent 0.25～0.45wt% is prepared burden.
3. the technology of a sintering magnetic core; proportion of raw materials is to have under the prerequisite identical with the prescription of claims 1.; in not having the common environment of atmosphere protection; in 60～200 minutes, heat up gradually; sintering temperature is controlled between 700～950 ℃, and keeping the time of temperature is 20～180 minutes.
4. the technology of a sintering magnetic core; proportion of raw materials is to have under the prerequisite identical with the prescription of claims 1.; in the environment of inert atmosphere protection or vacuum; in 30～200 minutes; heat up gradually; sintering temperature is controlled between 700～950 ℃, and keeping the time of temperature is 20～250 minutes.
5. the technology of a sintering magnetic core; proportion of raw materials is to have under the prerequisite identical with the prescription of claims 2.; in not having the common environment of atmosphere protection; in 60～200 minutes, heat up gradually; sintering temperature is controlled between 400～600 ℃, and keeping the time of temperature is 20～180 minutes.
6. the technology of a sintering magnetic core; proportion of raw materials is to have under the prerequisite identical with the prescription of claims 2.; in the environment of inert atmosphere protection or vacuum; in 30～200 minutes; heat up gradually; sintering temperature is controlled between 400～600 ℃, and keeping the time of temperature is 20～250 minutes.
7. the manufacture method of a magnetic core, proportion of raw materials is for counting by weight percentage iron powder 75～90wt%; Brown iron oxide 10～20wt%; Boron oxide or borax 2～8wt%; Under the prerequisite that the ratio of release agent 0.25～0.49wt% is prepared burden, admixture its one or more other replenishes the total quantity of material, counts by weight percentage, and the ratio that is not enough to 5wt% is prepared burden.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100011602A CN101488389B (en) | 2008-01-18 | 2008-01-18 | Production method for novel magnetic core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100011602A CN101488389B (en) | 2008-01-18 | 2008-01-18 | Production method for novel magnetic core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101488389A true CN101488389A (en) | 2009-07-22 |
| CN101488389B CN101488389B (en) | 2012-04-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100011602A Active CN101488389B (en) | 2008-01-18 | 2008-01-18 | Production method for novel magnetic core |
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| Country | Link |
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| CN (1) | CN101488389B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777407A (en) * | 2010-03-26 | 2010-07-14 | 北京科源科金属材料有限公司 | Method for improving magnetic permeability and consumption of amorphous core and composite core prepared by same |
| CN102228988A (en) * | 2011-06-28 | 2011-11-02 | 广州金南磁塑有限公司 | Method for preparing high-strength soft magnetic powder iron core |
| CN105132786A (en) * | 2015-09-25 | 2015-12-09 | 西安科技大学 | Preparing method and application of high-strength soft magnetic composite material |
| CN105551706A (en) * | 2015-12-18 | 2016-05-04 | 常熟市制冷压缩机铸件厂 | Refrigerator compressor motor iron core material |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2698369B2 (en) * | 1988-03-23 | 1998-01-19 | 日立金属株式会社 | Low frequency transformer alloy and low frequency transformer using the same |
| CN1020171C (en) * | 1989-09-03 | 1993-03-24 | 首都钢铁公司冶金研究所 | Method for making amorphous constant-permeability core |
| JP2003163109A (en) * | 2001-11-27 | 2003-06-06 | Daido Steel Co Ltd | Dust core |
-
2008
- 2008-01-18 CN CN2008100011602A patent/CN101488389B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777407A (en) * | 2010-03-26 | 2010-07-14 | 北京科源科金属材料有限公司 | Method for improving magnetic permeability and consumption of amorphous core and composite core prepared by same |
| CN102228988A (en) * | 2011-06-28 | 2011-11-02 | 广州金南磁塑有限公司 | Method for preparing high-strength soft magnetic powder iron core |
| CN102228988B (en) * | 2011-06-28 | 2013-04-17 | 广州金南磁塑有限公司 | Method for preparing high-strength soft magnetic powder iron core |
| CN105132786A (en) * | 2015-09-25 | 2015-12-09 | 西安科技大学 | Preparing method and application of high-strength soft magnetic composite material |
| CN105551706A (en) * | 2015-12-18 | 2016-05-04 | 常熟市制冷压缩机铸件厂 | Refrigerator compressor motor iron core material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101488389B (en) | 2012-04-25 |
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Free format text: FORMER OWNER: LI MINGSHAN |
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Free format text: CORRECT: ADDRESS; FROM: 313200 NO.525, QUYUAN NORTH ROAD, WUKANG TOWN, DEQING COUNTY, ZHEJIANG PROVINCE TO: 313200 ROOM 603, BUILDING 49, QUN'AN RESIDENTIAL QUATER, WUKANG TOWN, DEQING COUNTY, ZHEJIANG PROVINCE |
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Effective date of registration: 20110117 Address after: 313200 Zhejiang province Deqing County Wukang group district 49 room 603 Applicant after: Ke Cuan Address before: 313200 Zhejiang province Deqing County Wukang Qu Yuan Road No. 525 Applicant before: Ke Cuan Co-applicant before: Li Mingshan |
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Effective date of registration: 20220411 Address after: 313200 No. 882, Huancheng North Road, Fuxi street, Deqing County, Huzhou City, Zhejiang Province Patentee after: ZHEJIANG NBTM KEDA MAGNETOELECTRICITY CO.,LTD. Address before: 313200 room 603, building 49, Qun'an community, Wukang Town, Deqing County, Zhejiang Province Patentee before: Ke Xin |