Toroidal and rectangular cores – Nanocrystalline
NANOCRYSTALLINE CORES
Our company supplies high permeability nanocrystalline cores, suitable for CTs and filtering coils
specifications
High permeability and very low losses ( W/kg ) are the most known advantages of nanocrystalline material.
APPLICATIONS
These components can be used in measurement systems and electric energy transformation & control sector, such as:
- Low-medium-high voltage network transformers
- High frequency transformers
- High accuracy current transformers
- Chokes
- Current sensors
- Magnetic amplifiers
Nanocrystalline cores may be supplied:
Metallic case
With metallic case
Plastic case
With plastic case for medium-small dimensions, up to 150mm
Epoxy resin
Epoxy resin coated
Stiffened
Stiffened
Dimensional tolerances chart for nanocrystalline cores
| Nominal outer diameter (mm) | After thermal treatment (mm) | Epoxy resin coated (mm) | With plastic case (mm) | With steel/aluminium case (mm) |
|---|---|---|---|---|
| ≥ 25 < 49 | ± 0.5 | + 3 | ± 3.5 | |
| ≥ 50 < 99 | ± 0.8 | + 4 | ± 3.5 | ± 5 |
| ≥ 100 | ± 1.0 | + 5 | ± 4 | ± 5 |
| Nominal inner diameter (mm) | After thermal treatment (mm) | Epoxy resin coated (mm) | With plastic case (mm) | With steel/aluminium case (mm) |
| ≥ 10 < 24 | ± 0.3 | - 2 | ± 1.5 | |
| ≥ 25 < 49 | ± 0.5 | - 2,5 | ± 3 | ± 5 |
| ≥ 50 < 99 | ± 0.8 | - 3 | ± 3.8 | ± 5 |
| ≥ 100 | ± 0.8 | - 4 | ± 4 | ± 5 |
| Nominal height dimension (mm) | After thermal treatment (mm) | Epoxy resin coated (mm) | With plastic case (mm) | With steel/aluminium case (mm) |
| ≤ 10 | ± 0.2 | + 1 | ± 2.1 | ± 5 |
| ≥ 11 | ± 0.3 | + 3 | ± 3 | ± 5 |
Tolerances (±) reported are referred to nominal dimensions of the core
Nanocrystalline cores are supplied having the following magnetic guarantees
| Phisical Properties | Garanteed Values | ||
|---|---|---|---|
| Saturation flux density T 1,2 Permeability 80.000 μ/μ0 Density kg/m³ 7.350 Ribbon thickness µmm 23 ± 10 % Curie temperature °C 600 Magnetostriction ppm < 1 | TOROIDAL CORES - Magnetic Qualities | ||
| H eff | Minimum flux density | Magnetization curve | |
| in mA/cm | B in mT. | ||
| 0,5 | > 6 | nanocristallino lin.pdf | |
| 1 | > 15 | ||
| 10 | > 600 | nanocristallino log.pdf | |
| 20 | > 700 | ||
For cores having inner diameter above 450 mm the guarantees must be agreed during quotation or order phase.
Download Graphs
Nanocrystalline rectangular cores
Rectangular cores in nanocrystalline material has the same peculiarity of toroidal cores.
Manufactured on customer’s specification, with steel or aluminium case, with slightly minor magnetic characteristics compared to toroidal cores.
For dimensions above 500mm and curve radius <10mm, magnetic guarantees must be agreed in quotation/order phase.
| Rectangular core nominal dimensions | ||||||
|---|---|---|---|---|---|---|
| A | B | C | D | E | H | R |
| Dimensions including metallic case | ||||||
|---|---|---|---|---|---|---|
| mm | mm | mm | mm | mm | mm | mm |
| A - 5 | B - 5 | C + 5 | D + 5 | E + 5 | H + 5 | R -2,5 |