CN105374498A - EPOI-shaped multifunctional ferrite magnetic core and transformer - Google Patents
EPOI-shaped multifunctional ferrite magnetic core and transformer Download PDFInfo
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- CN105374498A CN105374498A CN201510957364.3A CN201510957364A CN105374498A CN 105374498 A CN105374498 A CN 105374498A CN 201510957364 A CN201510957364 A CN 201510957364A CN 105374498 A CN105374498 A CN 105374498A
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- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 27
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 12
- 229920002943 EPDM rubber Polymers 0.000 claims description 9
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 6
- 235000017550 sodium carbonate Nutrition 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 5
- 239000000347 magnesium hydroxide Substances 0.000 claims description 5
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 5
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 5
- 239000005662 Paraffin oil Substances 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 4
- 239000005864 Sulphur Substances 0.000 claims description 4
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 4
- RGCKGOZRHPZPFP-UHFFFAOYSA-N alizarin Chemical compound C1=CC=C2C(=O)C3=C(O)C(O)=CC=C3C(=O)C2=C1 RGCKGOZRHPZPFP-UHFFFAOYSA-N 0.000 claims description 4
- 230000003712 anti-aging effect Effects 0.000 claims description 4
- 239000003963 antioxidant agent Substances 0.000 claims description 4
- 230000003078 antioxidant effect Effects 0.000 claims description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 4
- 239000004200 microcrystalline wax Substances 0.000 claims description 4
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 4
- 239000011787 zinc oxide Substances 0.000 claims description 4
- 238000004804 winding Methods 0.000 abstract description 8
- 230000004907 flux Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 description 9
- 238000004513 sizing Methods 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000003679 aging effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000013536 elastomeric material Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000005987 sulfurization reaction Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
- 235000019438 castor oil Nutrition 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/068—Ultra high molecular weight polyethylene
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The invention provides an EPOI-shaped multifunctional ferrite magnetic core. The EPOI-shaped multifunctional ferrite magnetic core comprises two EPO-shaped magnetic core bodies and an I-shaped magnetic core body in a combined mode. According to the EPOI-shaped multifunctional ferrite magnetic core, two windings are arranged on one magnetic core for outputting and used as two inductors at the same time, and miniaturization of a magnetic device and a power source can be achieved; in addition, as the net sectional areas of the portions of a magnetic circuit of the magnetic core are even, the coincidence of magnetic flux densities of all the portions can be kept, the phenomena that as local magnetic flux densities are excessively high, excessively-high magnetic core losses are caused, and temperature-rising hot spots are generated accordingly can be avoided, and the reliability of the device and the reliability of the power source are improved. The invention further provides a transformer with the magnetic core.
Description
Technical field
The present invention relates to a kind of magnetic core of Mn-Zn soft magnetic ferrite and use the transformer of this magnetic core, particularly relate to a kind of EPOI shape multipurpose FERRITE CORE.
Background technology
Now larger for the common ferrite magnetic core volume of miniaturized Switching Power Supply or dc-dc transformer, setting height(from bottom) is higher, in Multiple coil outlet convenience and magnetic screen etc., there is the contradiction being difficult to take into account, the development trend that the miniaturization of Current electronic product, slimming, high power density and Electro Magnetic Compatibility are good can not be adapted to well;
The discrete devices such as transformer, inductance and filter are comprised inside a switching power source device, and the main composition part of these devices is all FERRITE CORE, existing EE, EI, ER shape magnetic core is the most frequently used shape, these magnetic cores occupy most of volume of device, simultaneously because there is opening these magnetic core both sides, Magnetic Shielding Effectiveness is poor; Existing EE, EI, ER shape magnetic core, all in the coiling of center pillar position, cannot realize Multiple coil outlet.
In addition, FERRITE CORE can be made into multi winding transformer and inductance.Because transformer at high temperature works usually, and the material such as rubber blanket, rubber frid used in transformer at present at high temperature heatproof air aging performance is not good, useful life is short, in order to improve the thermal-oxidative aging property of material, usually adopts ethylene propylene diene rubber as elastomeric material.But, although existing ethylene-propylene-diene monomer glued compound material ageing-resistant performance increases, still do not reach desirable requirement, and mechanical strength is not high.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of EPOI shape multipurpose FERRITE CORE that a kind of structure is simple, cost is low, easy and simple to handle.
A kind of EPOI shape of the present invention multipurpose FERRITE CORE, comprises two EPO shape magnetic cores and an I sheet shape core combination forms, and described EPO shape magnetic core comprises bottom surface, newel and limit leg; Described bottom surface is square, and described newel cross section is oval, and described limit leg camber also surrounds newel, leaves lead wire outlet, leave gap between described newel and I sheet in newel both sides.
Preferably, described newel both sides and arc-shaped side distance are unanimously.
Preferably, the total height of described EPOI shape multipurpose FERRITE CORE is at 3-5mm.
Preferably, the bottom surface of described magnetic core is the square length of side is 7-9mm.
Preferably, the newel of described magnetic core is oval, and the minor axis of described ellipse is 2.6-2.8mm, and major axis is 5.1-5.3mm.
Beneficial effect: adopt a kind of EPOI shape multipurpose FERRITE CORE of the present invention to have two windings on same secondary magnetic core and export, use as two inductance simultaneously, the miniaturization of magnetic device and power supply can be realized; Core center post is oval, is convenient to coil winding, and larger than circular center pillar sectional area, can increase through-put power; Center pillar opening part, in same direction, is convenient to Multiple coil outlet, conveniently realizes the multiple-channel output of power supply; There is good magnetic screening effect, can Radiative EMI be reduced; The magnetic circuit of magnetic core everywhere net sectional area is comparatively even, can keep the consistency of magnetic flux density everywhere, can not be too high and cause too high core loss due to local flux density, thus produces temperature rise " focus ", improves the reliability of device and power supply.
Another object of the present invention is to provide a kind of formula of ethylene propylene terpolymer with that can meet ageing properties, requirement of mechanical strength, as the elastomeric material in EOPI shape multipurpose FERRITE CORE multi winding transformer of the present invention.
To achieve these goals, the invention provides a kind of for the above-mentioned ethylene propylene diene rubber in transformer, its weight proportion is as follows: EPDM75 part, IIR10 part, ultra-high molecular weight polyethylene 15 parts, anti-aging agent RD 1 part, antioxidant BLE-W1 part, 3 parts, zinc oxide, white carbon 25 parts, magnesium hydroxide 40 parts, Firebrake ZB 5 parts, paraffin oil 4 parts, turkey red oil 1 part, microwax 2 parts, DCP3 part, two 251 parts of vulcanizing agent, soda ash 1 part, sulphur 0.5 part.
The present invention adopts the method for post-cure, and improve product crosslinking degree, wherein the temperature of one step cure is 170 DEG C ~ 180 DEG C, cure time 5 ' ~ 10 '; The temperature of post vulcanization is 170 DEG C, cure time 90 '.
Because IIR belongs to softening type when high temperature, EPDM then belongs to constrictive type, both and with reducing sizing material firmness change when high temperature; Ultra-high molecular weight polyethylene and ethylene propylene diene rubber are also by the weatherable performance that can improve rubber; Soda ash is conducive to accelerating curingprocess rate, improves the heat resistance of sizing material; Adding soda ash makes system be alkalescence, plays a driving role, can shorten the cure time of sizing material to the vulcanization of rubber, and in addition, soda ash thermal stability material, is conducive to the thermal stability improving sizing material; Magnesium hydroxide and Firebrake ZB composition halogen-free flame-retardant system, meet environmental requirement; White carbon is reinforcing agent, can improve the resistance to elevated temperatures of sizing material, mechanical strength and resistance to water with turkey red oil (sulfonated castor oil).
Accompanying drawing explanation
Fig. 1 is a kind of EPOI shape of the present invention multipurpose ferrite overall schematic;
Wherein: 1, EPO shape magnetic core, 2, I sheet shape magnetic core, 11, bottom surface, 12, newel, 13, limit leg, 3, lead wire outlet.
Embodiment
Embodiment 1
As shown in Figure 1, there is shown, a kind of EPOI shape multipurpose FERRITE CORE, comprises two EPO shape magnetic cores and an I sheet shape core combination forms, and described EPO shape magnetic core comprises bottom surface 11, newel 12 and limit leg 13; Described bottom surface 11 is square, described newel 12 cross section is oval, and described limit leg 13 camber also surrounds newel 12, leaves lead wire outlet in newel 12 both sides, leave gap between described newel 12 and I sheet, described newel both sides and arc-shaped side distance are unanimously.
In the present embodiment, and the total height of EPOI shape multipurpose FERRITE CORE is at 4mm, and the bottom surface of magnetic core is the square length of side is 8mm, and the newel of described magnetic core is oval, and the minor axis of described ellipse is 2.7mm, and major axis is 5.2mm.
Present embodiments provide a kind of EOPI shape multipurpose FERRITE CORE, especially the Switching Power Supply high integration magnetic core of Multiple coil outlet, due to core structure and the shape of the present embodiment, the Switching Power Supply made not only reduces volume, be convenient to line and lead-out wire between Multiple coil, and taken into account magnetic shield property preferably, high power density, multiple-channel output, multiduty function can be realized.
In addition, through the optimal design of overall dimension, substantially the uniformity consistency of magnetic circuit is maintained, can not be too high and cause core loss to increase severely due to local flux density, form temperature rise " focus ", thus effectively control the temperature rise of device, EOPI shape multi-functional ferrite core can be made into multi winding transformer and inductance, for miniaturization, lightweight Switching Power Supply, dc-dc and DC-AC inverter, be widely used in fields such as communication, automotive electronics, mancarried electronic aid, LED illumination.
Described on base, the present invention has two windings and exports on same secondary magnetic core, uses simultaneously, can realize the miniaturization of magnetic device and power supply as two inductance; Core center post is oval, is convenient to coil winding, and larger than circular center pillar sectional area, can increase through-put power; Center pillar opening part, in same direction, is convenient to Multiple coil outlet, conveniently realizes the multiple-channel output of power supply; There is good magnetic screening effect, can Radiative EMI be reduced; The magnetic circuit of magnetic core everywhere net sectional area is comparatively even, can keep the consistency of magnetic flux density everywhere, can not be too high and cause too high core loss due to local flux density, thus produces temperature rise " focus ", improves the reliability of device and power supply.
Embodiment 2
For the above-mentioned ethylene propylene diene rubber in transformer, weight proportion is as follows: EPDM75 part, IIR10 part, ultra-high molecular weight polyethylene 15 parts, anti-aging agent RD 1 part, antioxidant BLE-W1 part, 3 parts, zinc oxide, white carbon 25 parts, magnesium hydroxide 40 parts, Firebrake ZB 5 parts, paraffin oil 4 parts, turkey red oil 1 part, microwax 2 parts, DCP3 part, two 251 parts of vulcanizing agent, soda ash 1 part, sulphur 0.5 part.
Adopt the method for post-cure to carry out sulfuration, wherein the temperature of one step cure is 170 DEG C ~ 180 DEG C, cure time 5 ' ~ 10 '; The temperature of post vulcanization is 170 DEG C, cure time 90 '.
Comparative example
The weight proportion of ethylene propylene diene rubber is as follows: an EPDM100 part, anti-aging agent RD 1 part, antioxidant BLE-W1 part, 3 parts, zinc oxide, white carbon 25 parts, magnesium hydroxide 40 parts, Firebrake ZB 5 parts, paraffin oil 5 parts, microwax 2 parts, DCP3 part, two 251 parts of vulcanizing agent, sulphur 0.5 part.
Adopt the method for post-cure to carry out sulfuration, wherein the temperature of one step cure is 170 DEG C ~ 180 DEG C, cure time 5 ' ~ 10 '; The temperature of post vulcanization is 170 DEG C, cure time 90 '.
Carry out performance test to the vulcanized rubber of embodiment 2 and comparative example, result is as following table 1.
Table 1 performance test
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection range that claims of the present invention determines.
Claims (8)
1. an EPOI shape multipurpose FERRITE CORE, is characterized in that: comprise two EPO shape magnetic cores and an I sheet shape core combination forms, and described EPO shape magnetic core comprises bottom surface, newel and limit leg; Described bottom surface is square, and described newel cross section is oval, and described limit leg camber also surrounds newel, leaves lead wire outlet, leave gap between described newel and I sheet in newel both sides.
2. a kind of EPOI shape multipurpose FERRITE CORE according to claim 1, is characterized in that: described newel both sides and arc-shaped side distance are unanimously.
3. a kind of EPOI shape multipurpose FERRITE CORE according to claim 1, is characterized in that: the total height of described EPOI shape multipurpose FERRITE CORE is at 3-5mm.
4. a kind of EPOI shape multipurpose FERRITE CORE according to claim 1, is characterized in that: the bottom surface of described magnetic core is the square length of side is 7-9mm.
5. a kind of EPOI shape multipurpose FERRITE CORE according to claim 1, is characterized in that: the newel of described magnetic core is for oval, and the minor axis of described ellipse is 2.6-2.8mm, and major axis is 5.1-5.3mm.
6. a transformer, uses the EPOI shape multipurpose FERRITE CORE described in any one of claim 1-5.
7. transformer according to claim 6, is characterized in that, also uses a kind of ethylene propylene diene rubber.
8. transformer according to claim 7, is characterized in that, described ethylene propylene diene rubber weight proportion is as follows: EPDM75 part, IIR10 part, ultra-high molecular weight polyethylene 15 parts, anti-aging agent RD 1 part, antioxidant BLE-W1 part, 3 parts, zinc oxide, white carbon 25 parts, magnesium hydroxide 40 parts, Firebrake ZB 5 parts, paraffin oil 4 parts, turkey red oil 1 part, microwax 2 parts, DCP3 part, two 251 parts of vulcanizing agent, soda ash 1 part, sulphur 0.5 part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510957364.3A CN105374498B (en) | 2015-12-18 | 2015-12-18 | A kind of transformator of use EPOI shapes multipurpose FERRITE CORE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510957364.3A CN105374498B (en) | 2015-12-18 | 2015-12-18 | A kind of transformator of use EPOI shapes multipurpose FERRITE CORE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105374498A true CN105374498A (en) | 2016-03-02 |
| CN105374498B CN105374498B (en) | 2017-04-05 |
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| CN201510957364.3A Active CN105374498B (en) | 2015-12-18 | 2015-12-18 | A kind of transformator of use EPOI shapes multipurpose FERRITE CORE |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200986841Y (en) * | 2006-12-22 | 2007-12-05 | 联振电子(深圳)有限公司 | Choke coil |
| CN102709029A (en) * | 2012-01-31 | 2012-10-03 | 鸿康磁业电子（昆山）有限公司 | Ferrite magnetic core |
| CN202749179U (en) * | 2012-07-30 | 2013-02-20 | 湖北华磁电子科技有限公司 | Novel soft magnetic ferrite core |
| CN104788829A (en) * | 2015-04-19 | 2015-07-22 | 青岛康泰鑫环保科技有限公司 | Environment-friendly anti-aging plastic |
-
2015
- 2015-12-18 CN CN201510957364.3A patent/CN105374498B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200986841Y (en) * | 2006-12-22 | 2007-12-05 | 联振电子(深圳)有限公司 | Choke coil |
| CN102709029A (en) * | 2012-01-31 | 2012-10-03 | 鸿康磁业电子（昆山）有限公司 | Ferrite magnetic core |
| CN202749179U (en) * | 2012-07-30 | 2013-02-20 | 湖北华磁电子科技有限公司 | Novel soft magnetic ferrite core |
| CN104788829A (en) * | 2015-04-19 | 2015-07-22 | 青岛康泰鑫环保科技有限公司 | Environment-friendly anti-aging plastic |
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| CN105374498B (en) | 2017-04-05 |
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Denomination of invention: Transformer using epoi shaped multipurpose ferrite core Effective date of registration: 20210813 Granted publication date: 20170405 Pledgee: Shandong Tengzhou rural commercial bank Limited by Share Ltd. SME branch Pledgor: SHANDONG JIANUO ELECTRONICS Co.,Ltd. Registration number: Y2021980007724 |
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Date of cancellation: 20220816 Granted publication date: 20170405 Pledgee: Shandong Tengzhou rural commercial bank Limited by Share Ltd. SME branch Pledgor: SHANDONG JIANUO ELECTRONICS Co.,Ltd. Registration number: Y2021980007724 |
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Denomination of invention: A Transformer Using EPOI Shape Multipurpose Ferrite Core Effective date of registration: 20220831 Granted publication date: 20170405 Pledgee: Shandong Tengzhou Rural Commercial Bank Co.,Ltd. Pledgor: SHANDONG JIANUO ELECTRONICS Co.,Ltd. Registration number: Y2022980014184 |
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Date of cancellation: 20230103 Granted publication date: 20170405 Pledgee: Shandong Tengzhou Rural Commercial Bank Co.,Ltd. Pledgor: SHANDONG JIANUO ELECTRONICS Co.,Ltd. Registration number: Y2022980014184 |