CN114513099A - Preparation process of soft magnetic composite material stator - Google Patents
Preparation process of soft magnetic composite material stator Download PDFInfo
- Publication number
- CN114513099A CN114513099A CN202210198935.XA CN202210198935A CN114513099A CN 114513099 A CN114513099 A CN 114513099A CN 202210198935 A CN202210198935 A CN 202210198935A CN 114513099 A CN114513099 A CN 114513099A
- Authority
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- China
- Prior art keywords
- soft magnetic
- epoxy resin
- magnetic composite
- stator
- modified epoxy
- 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.)
- Pending
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- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 239000002131 composite material Substances 0.000 title claims abstract description 16
- 239000003822 epoxy resin Substances 0.000 claims abstract description 46
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 46
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000011246 composite particle Substances 0.000 claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 13
- 239000002105 nanoparticle Substances 0.000 claims abstract description 10
- 239000011259 mixed solution Substances 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 239000010703 silicon Substances 0.000 claims abstract description 6
- 239000007822 coupling agent Substances 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- OLLFKUHHDPMQFR-UHFFFAOYSA-N dihydroxy(diphenyl)silane Chemical compound C=1C=CC=CC=1[Si](O)(O)C1=CC=CC=C1 OLLFKUHHDPMQFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 claims description 2
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 239000011863 silicon-based powder Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 abstract description 9
- 239000011347 resin Substances 0.000 abstract description 9
- 238000002161 passivation Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 125000003700 epoxy group Chemical group 0.000 abstract description 2
- 238000011049 filling Methods 0.000 abstract description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 239000000314 lubricant Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical group NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229940018564 m-phenylenediamine Drugs 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical class [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 229940037312 stearamide Drugs 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 238000002411 thermogravimetry Methods 0.000 description 1
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/20—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/22—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
- H01F1/24—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated
- H01F1/26—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated by macromolecular organic substances
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
Abstract
The invention discloses a preparation process of a soft magnetic composite material stator, which comprises the following steps: passivating iron powder; mixing the organosilicon modified epoxy resin with the coupling agent modified nano particles to prepare modified epoxy resin; adding the passivated iron powder into the mixed solution of the modified epoxy resin and the curing agent, uniformly stirring, granulating and drying to obtain soft magnetic composite particles; pressing the soft magnetic composite particles into a stator blank; the preparation method is characterized in that the stator blank is subjected to heat treatment, the preparation process of the stator is improved in the scheme, the organic silicon modified epoxy resin is used for reducing the internal stress of the resin and reducing the number of epoxy groups so as to reduce the reaction activity, the thermal stability of the resin is greatly improved by matching with the nano particle filling treatment, the heat treatment process can be performed on the blank subjected to press forming so as to release the stress to improve the performance, the mechanical strength is improved, the passivation film layer on the surface of the iron powder and the resin on the surface form double protection, and the stator has the advantages of good insulativity, low eddy current loss and the like.
Description
Technical Field
The invention relates to the technical field of soft magnetic materials, in particular to a preparation process of a soft magnetic composite material stator.
Background
At present, the iron powder core compression molding process is adopted in the field of motor stators, products with complex shapes are used, the surface of iron powder is subjected to insulation coating treatment, eddy current loss can be effectively reduced due to insulation between particles, common insulation coatings comprise organic resin insulation coatings, baking treatment is carried out at the temperature of below 200 ℃, due to poor thermal stability of resins, carbonization of an insulation layer is easily caused at high temperature, holes are generated on an insulation surface, the eddy current loss of the product is finally increased, but stress cannot be released only through low-temperature treatment, the stability of the product is influenced, and improvement is needed.
Disclosure of Invention
In order to solve at least one technical defect, the invention provides the following technical scheme:
the application document discloses a preparation process of a soft magnetic composite material stator, which comprises the following steps:
passivating iron powder;
mixing the organosilicon modified epoxy resin with the coupling agent modified nano particles to prepare modified epoxy resin;
adding the passivated iron powder into the mixed solution of the modified epoxy resin and the curing agent, uniformly stirring, granulating and drying to obtain soft magnetic composite particles;
pressing the soft magnetic composite particles into a stator blank;
and performing heat treatment on the stator blank.
According to the scheme, the preparation process of the stator is improved, the organic silicon modified epoxy resin is used for reducing the internal stress of the resin, the number of epoxy groups is reduced to reduce the reaction activity, the thermal stability of the resin is greatly improved by matching with the nano particle filling treatment, the thermal treatment process can be carried out on the blank formed by pressing to release the stress, the performance is improved, the mechanical strength is improved, the passivation film layer on the surface of the iron powder and the resin on the surface form double protection, and the stator has the advantages of good insulativity, low eddy current loss and the like.
Of course, the iron powder can be heat treated in advance to release stress, and the performance can be improved by matching with secondary heat treatment.
In addition, before pressing, a release agent can be added into the soft magnetic composite particles to facilitate the release, and the dosage of the release agent is 0.5-0.8% of that of the soft magnetic composite particles.
Further, diphenyl silanediol and epoxy resin are reacted to generate organic silicon modified epoxy resin under the action of a catalyst, the amount ratio of diphenyl silanediol to epoxy resin is 3-5:1, the reaction temperature is 140-.
Furthermore, the nano particles are titanium dioxide, the mass fraction of the nano particles in the epoxy resin modified by organic silicon is 2-4%, and the titanium dioxide has good thermal stability and high temperature resistance, has good bonding property with the epoxy resin and the like, and can increase the strength of the resin matrix.
Further, the mass ratio of the passivated iron powder to the modified epoxy resin to the curing agent is 80-86: 2-4: 0.05-0.06, preferably the component ratio.
Further, when pressing into a stator blank, the pressure range is: 600 MPa and 800MPa, and keeping the pressure for 5-10 min.
Further, in the heat treatment step, the temperature range is 300--2-10- 1Pa, under a certain vacuum degree, the heat treatment at the temperature of 300-400 ℃ is carried out on the blank formed by pressing, which is beneficial to improving the stability of the product.
Further, the iron powder is one or more of pure iron powder, iron-nickel powder or iron-silicon powder.
Further, the particle size range of the iron powder is: 60-100 μm.
Compared with the prior art, the invention has the beneficial effects that:
1. the modified epoxy resin is solidified on the surface of the iron powder to form a film, and is matched with the passivation layer to form double protection, and the thermal stability of the modified epoxy resin is improved, so that the performance of a stator product can be improved by heat treatment.
Detailed Description
The present invention will be further described with reference to the following specific examples.
The preparation of the organosilicon modified epoxy resin comprises the steps of mixing diphenyl silanediol and epoxy resin according to the mass ratio of 4:1, taking stannous octoate as a catalyst (which is 0.8 percent of the mass of the epoxy resin), reacting at the temperature of 145 ℃ for 2 hours.
Preparation of coupling agent modified titanium dioxide: titanium dioxide (with the particle size of 50-55nm and the proportion of 3 percent of the organosilicon modified epoxy resin) is added into a coupling agent kh560 and alcohol and mixed according to the proportion of 1:10 to form a solution for modification.
With the specific description in this example in mind, the properties of the modified epoxy resin prepared within the process parameters defined in this scheme are essentially identical.
The curing agent is m-phenylenediamine, the iron powder is pure iron, the particle size is 80 +/-5 nm, the iron powder is subjected to heat treatment in advance, the iron powder is loaded into a furnace at 600 ℃, the temperature is increased to 800 ℃ along with the furnace at 60 ℃/h, then is increased to 830 ℃ at 30 ℃/h, is kept for 4h, is cooled to 700 ℃ at a cooling speed of 45 ℃/h, and is finally cooled to 500 ℃ to be discharged from the furnace.
Example 1
A preparation process of a soft magnetic composite material stator comprises the following steps:
and (3) passivating iron powder, namely mixing a phosphoric acid solution with the pH value of 3 with equal mass of iron powder, stirring and reacting for 15min at the temperature of 50 ℃, filtering, washing and drying at the temperature of 80 ℃ to obtain passivated iron powder.
And adding the titanium dioxide modified solution into the reacted organosilicon modified epoxy resin product, heating and refluxing at 90 ℃, magnetically stirring for 1h, and then decompressing and steaming to remove alcohol to obtain the modified epoxy resin.
Adding passivated iron powder into a mixed solution of modified epoxy resin and a curing agent, uniformly stirring and granulating, and drying at 60 ℃ to obtain soft magnetic composite particles, wherein the mass ratio of the passivated iron powder to the modified epoxy resin to the curing agent is 85: 3: 0.05, adding the modified epoxy resin and the curing agent into acetone with the weight 5 times that of the modified epoxy resin to form a mixed solution.
Pressing the soft magnetic composite particles into stator blanks, keeping the pressure at 700 +/-3 MPa for 8min, and doping organic lubricant, namely hard amide into the soft magnetic composite particles before pressing, wherein the doping amount is 0.6 percent of the mass of the soft magnetic composite particles.
Heat treating the stator blank, putting the stator blank in a furnace in protective atmosphere, heating to 400 ℃, and keeping the vacuum degree at 10-2Pa, the time is 2 hours, and the product is removed after cooling.
Example 2
In the preparation process of the soft magnetic composite material stator in the embodiment, the preparation of the passivation of the iron powder and the preparation of the modified epoxy resin are the same as those in the embodiment 1.
Adding passivated iron powder into a mixed solution of modified epoxy resin and a curing agent, uniformly stirring and granulating, and drying at 60 ℃ to obtain soft magnetic composite particles, wherein the mass ratio of the passivated iron powder to the modified epoxy resin to the curing agent is 80: 2: 0.05, adding the modified epoxy resin and the curing agent into acetone with the weight 5 times that of the modified epoxy resin to form a mixed solution.
Pressing the soft magnetic composite particles into a stator blank, keeping the pressure at 800 +/-3 MPa for 5min, and doping organic lubricant, namely hard amide into the soft magnetic composite particles before pressing, wherein the doping amount is 0.5 percent of the mass of the soft magnetic composite particles.
Heat treating the stator blank, putting the stator blank in a furnace in protective atmosphere, heating to 380 ℃ and keeping the vacuum degree at 10-2Pa, the time is 2 hours, and the product is removed after cooling.
Example 3
In the preparation process of the soft magnetic composite material stator in the embodiment, the preparation of the passivation of the iron powder and the preparation of the modified epoxy resin are the same as those in the embodiment 1.
Adding passivated iron powder into a mixed solution of modified epoxy resin and a curing agent, uniformly stirring and granulating, and drying at 60 ℃ to obtain soft magnetic composite particles, wherein the mass ratio of the passivated iron powder to the modified epoxy resin to the curing agent is 86: 4: 0.06, adding the modified epoxy resin and the curing agent into acetone with the weight 6 times that of the modified epoxy resin to form a mixed solution.
And pressing the soft magnetic composite particles into a stator blank under the pressure of 750 +/-3 MPa, maintaining the pressure for 8min, and before pressing, doping an organic lubricant, namely stearamide, into the soft magnetic composite particles, wherein the doping amount is 0.6 percent of the mass of the soft magnetic composite particles.
Heat treating the stator blank, putting the stator blank in a furnace in protective atmosphere, heating to 370 ℃ and keeping the vacuum degree at 10-2Pa, the time is 2 hours, and the product is removed after cooling.
In the embodiment, the organic lubricant is doped into the composite particles in the compression molding process to serve as the release agent, the die drawing phenomenon is avoided in the demolding process, the organic lubricant is easy to remove in the heat treatment process, thermogravimetric analysis is carried out on the soft magnetic composite particles prepared in the embodiment, the temperature when the thermal weight loss is 5% is 410 +/-3 ℃, the thermal weight loss 10% is 450 +/-5 ℃, and the thermal stability of the epoxy resin is greatly improved compared with that of the film layer after the nano particles are modified by organic silicon. Furthermore, from the measurements, the magnetic induction B of the statorm(mT) is more than 1150, magnetic permeability is more than 290, and 1KHz/0.5TThe magnetic loss Pc is basically about 28, and the soft magnetic material is proved to have the advantages of higher magnetic induction intensity, high magnetic conductivity, low magnetic loss and the like.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. A preparation process of a soft magnetic composite material stator is characterized by comprising the following steps:
passivating iron powder;
mixing the organosilicon modified epoxy resin with the coupling agent modified nano particles to prepare modified epoxy resin;
adding the passivated iron powder into the mixed solution of the modified epoxy resin and the curing agent, uniformly stirring, granulating and drying to obtain soft magnetic composite particles;
pressing the soft magnetic composite particles into a stator blank;
and performing heat treatment on the stator blank.
2. A process for the preparation of a soft magnetic composite stator according to claim 1, characterized in that: under the action of a catalyst, diphenyl silanediol and epoxy resin react to generate organic silicon modified epoxy resin, wherein the mass ratio of diphenyl silanediol to epoxy resin is 3-5:1, the reaction temperature is 140-.
3. A process for the preparation of a soft magnetic composite stator according to claim 1, characterized in that: the nano particles are titanium dioxide, and the mass fraction of the nano particles in the organosilicon modified epoxy resin is 2-4%.
4. A process for the preparation of a soft magnetic composite stator according to claim 1, characterized in that: the mass ratio of the passivated iron powder to the modified epoxy resin to the curing agent is 80-86: 2-4: 0.05-0.06.
5. A process for the preparation of a soft magnetic composite stator according to claim 1, characterized in that: when pressing into a stator blank, the pressure range: 600 MPa and 800MPa, and keeping the pressure for 5-10 min.
6. A process for the preparation of a soft magnetic composite stator according to claim 1, characterized in that: in the heat treatment step, the temperature range is 300--2-10-1Pa。
7. A process for the preparation of a soft magnetic composite stator according to claim 1, characterized in that: the iron powder is one or more of pure iron powder, iron-nickel powder or iron-silicon powder.
8. A process for the preparation of a soft magnetic composite stator according to claim 1, characterized in that: the particle size range of the iron powder is as follows: 60-100 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210198935.XA CN114513099A (en) | 2022-03-02 | 2022-03-02 | Preparation process of soft magnetic composite material stator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210198935.XA CN114513099A (en) | 2022-03-02 | 2022-03-02 | Preparation process of soft magnetic composite material stator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114513099A true CN114513099A (en) | 2022-05-17 |
Family
ID=81552885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210198935.XA Pending CN114513099A (en) | 2022-03-02 | 2022-03-02 | Preparation process of soft magnetic composite material stator |
Country Status (1)
| Country | Link |
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| CN (1) | CN114513099A (en) |
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|---|---|---|---|---|
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2022
- 2022-03-02 CN CN202210198935.XA patent/CN114513099A/en active Pending
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