Supplier : Nanocrystalline /amorphous ribbons, amorphous c-cores, electric current transformer (induction) cores, welding inverter core, zero sequence current transformer, common mode choke
Established: 1994
Standards: ISO9001
Verification Status
Contact Details:
3-4 Zong Er Road
Beijing
101309
Shunyi Dist
China
Application areas:
Measuring-level current transformer used in power system, transformer used on precision measuring instruments (such as watt-hour meter).
According to the requirements of different measurement accuracy of the transformer, different soft magnetic materials can be chosen as iron core materials. The higher the permeability of the iron core is, the smaller the measurement error of the transformer is, hence the accuracy is higher. At present, the most common iron core material is cold-rolled silicon steel sheet, followed by Permalloy and nano-crystalline glass alloy.
In recent years, demands for transformers with high-precision level (such as class 0.2, class 0.2Sand class0.5S) increased rapidly. When small ratio, low ampere turns are required or the iron core is restricted because of the small volume, the cold-rolled silicon steel often fails to meet the accuracy requirements. Although the Permalloy iron cores with high permeability can meet the required precision, its price is very high.
However use of nano-crystalline alloy iron cores can both meet the accuracy requirements and be produced at lower cost than the Permalloy. Therefore, the demand of measuring level current transformer iron core made of nano-crystalline alloy rapidly increased domestically.
The typical parameters comparison of the common soft magnetic materials used for current transformer iron cores:
Basic parameters
Nano-crystalline iron core
Permalloy (1J85) iron core
Silicon steel iron core
Saturation magnetic flux density (Bs)
1.25T
0.75T
2.03T
It is made of the iron-based nano-crystalline strips with a moderate saturation magnetic induction, high permeability and low loss, which can effectively reduce ratio difference angle difference of the transformer. The saturation magnetic induction Bs of nano-crystalline alloy is between the silicon steel and Permalloy.
The lower the Bs value is, the lower the security coefficient of the instrument is. When the system failure occurs and large current through the current transformer results therefore, the iron core is more easily filled, and the secondary current no longer increases in proportion, as can assure that the secondary instruments are well protected and not to be damaged. Permeability of nano-crystalline alloy is close to Permalloy and a magnitude higher than silicon steel, so it is suitable to be made as high-precision transformer iron core.
The density and lamination coefficient of nano-crystalline is lower than that of Permalloy, under the condition of the same size and similar performance of the two. In this case the nano-crystalline iron core is 1/4 lighter in weight, and 1/3 lower in the manufacturing cost. In addition, the linear range of nano-crystalline alloy is wider than that of Permalloy .It can work for a long time at temperature of -55 ~ 130 ¡æ ,with a good temperature stability.
b. Ring core:
No.
The iron Core Size
Case size(mm)
The weight of the iron core (kg per piece)
Turns ratio N1: N2 is 1:1; Input current (mA), 50Hz; Output voltage (mV)
It has the advantages of low loss and high saturation magnetic flux density and is widely used in power transformers, high frequency inductors, reactors and other components.
Performance features:
Convenient for coil assembling
Excellence in anti-DC bias
With high permeability and low coercivity, it can improve efficiency of the device, reduce the size; With low-loss, it can reduce temperature rise.
Good temperature stability enables it work for a long time at temperature of -50 ~ 130oC .
Product specifications and typical properties:
No.
Code
a
b
c
d
e
f
Le
Ae
M
VOL
Wa
WaAe
Anti-DC transformer cores as a combination of core components, used in electrical degree / watt-hour meter, power measuring systems.
Features of the core:
1. Strong anti-DC-capacity;
2. Precision, the scope of application of 0.5-0.1 grade level, the scope of application of current 1.5-200A;
3. Excellent high and low temperature properties;
4. A high price.
Product Specifications: No.
Magnetic Stripe Specifications
No.
Magnetic Stripe Specifications
1
10, 10, 200
4
10, 10, 180
2
15, 15, 200
5
15, 15, 180
3
20, 20, 250
6
20, 25, 100
Performance characteristics:
With high saturation magnetic induction,high magnetic permeability,low coersive force,low core loss(equivalent to one-fifth~one-third of silicon steel),constant magnetic,low excitation current,good temperature stability and aging stability.
Application:
Mainly used to replace silicon as a variety of forms, different power-frequency distribution transformers, power factor correction inductors, small transformers, high power rectangular core, the output energy storage filter inductors, saturable reactor, interference filter inductor, IF transformer core, the working frequency from 50Hz to 10kHz; as a high-power switching power reactor core materials, the use of frequencies up to 50kHz.
Specifications:
Thickness 20 to 30 hairline,width 2.5mm to 120 mm.Can make according to clients requirements.
Application:
Transformer cores for high frequency switch mode power supplies
Current transformer cores for electric industry
Transformer cores for ground-fault-interrupters
Cores for filters, storage inductors, and reactors
EMC common mode chokes
Sensor cores
Cores for saturable reactors, magnetic amplifiers, beads, and pulse compressors
Physical properties:
Saturate Induction 1.25T Hardness Hv 880kg/mm2
Curie Temperature 560 degree C Density 7.2g/cm3
Crystallization Temperature 510 degree C Resistivity 130¦Ì¦¸-cm
Saturate Magnetostriction 2, 10-6
Magnetic properties:
Product type Transverse field annealed No field annealed Longitudinal field annealed
Initial permeability >3, 104 >8, 104 >1, 104
Maximum permeability >5, 104 >45, 104 >50, 104
Remanence <0.2T 0.6T >0.85T
Coercivity <1.8A/m <0.8A/m <1.8A/m
Core loss (20kHz, 0.5T) <50 W/kg <25W/kg <90W/kg
Core loss (100kHz, 0.3T) <150W/kg <150W/kg <300W/kg
Variation of core loss (-55-125) <15% <15% <15%.
Applications:
It can be used for EMI common mode filter of all kinds of power supply
Features:
High saturation magnetic induction (1.25T), high permeability, high inductance ( 10 times of the amount of ferrite inductors), low loss, small size, light weight, strong anti-electromagnetic interference capability, excellent frequency characteristics , and high temperature stability
Residual magnetic flux density (T)
0.3,0.5
0.5,0.8
Initial permeability
>80,000
>80,000
Maximum permeability
>600,000
>600,000
Coercivity (A / m)
< 2
< 2
Iron loss (20kHz, 0.5T), w / kg
< 25
< 25
Iron Loss (100kHz, 0.2T), w / kg
< 60
< 70
Iron loss rate of change (-50 ~ 130oC)
15
Applications:
It can be used for output filter inductors, smoothing inductors, energy storage inductors of all kinds of power supplies and energy-saving lamp electronic ballasts, and the differential-mode inductance in the EMC filters.The open iron core has a good constant inductors properties and anti-DC bias capability. With low-loss, it can be used as inductor iron core of a variety of power supply.
Features:
The open iron core has a good constant inductors properties and anti-DC bias capability. With low-loss, it can be used as inductor iron core of a variety of power supply.
Specification and Performance of the Iron Core:
Specification of the Iron Core
Effective permeability
Transverse Magnetic Range (Oe)
The rate of change (%)
12/20, 8
180
0¡«50
15
12/20, 10
180
0¡«50
15
16/26, 10
1000
0¡«10
20
300
0¡«30
15
180
0¡«50
15
20/32, 10
1000
0¡«10
20
300
0¡«30
15
180
0¡«50
15
20/30, 15
1000
0¡«10
20
300
0¡«30
15
180
0¡«50
15
32/50, 10
1000
0¡«10
20
300
0¡«30
15
180
0¡«50
15
32/50, 15
1000
0¡«10
20
300
0¡«30
15
180
0¡«50
15
Note: Iron cores of other specifications can be provided upon request of users.
We are proposing about 2000tons of iron slag derived from the desulphurisation skimming process. This material is a iron by- product that is encapsulated in varying levels of contaminants (S,Mg,Si). In order to enhance its usability, the material is processed and screened. We can propose two specifications of Iron Slag
- European Code: 19.12.01
- Basel Code: B1010
- HS Code: 2619.0020
- Quantity: 2000 tons currently available
- Monthly quantity: 500-1000 tons depending on production
- Size: 350 1200 mm
- Fe content: from 77 to 86%
- C content: above 2,5-3%
- Bulk density: 2,8-3,4 tons/m3
- Loading type: loose in 20 (26-27 tons on average)
The level of Fe% in the slag has been estimated by water displacement test. For any further information please feel free to contact us
Divanti Group generates large volume of iCORE and Core 2 Duo Laptops monthly. Each lot is separated by either iCORE Laptops or Dual Core/Core 2 Duo Laptops. Our approximate order ranges from 100-300 units on average. If you are interested in purchasing laptops in bulk, feel free to send me your email address and I can send over current stock lists that is available.
