Toroidal Core
Range of dimension:
- Strip width: minimum 3mm
- Inside diameter: minimum 5mm
- Outside diameter: minimum 8mm, maximum 1100mm
Toroidal cores tolerance (mm) | ||||
Outside Diameter | Inside Diameter | Height | ||
OD | △D | ID | △d | △h |
≤10 | ±0.4 | ≤10 | ±0.30 | ±0.3 |
≤25 | ±0.5 | ≤25 | ±0.40 | ±0.3 |
≤50 | ±1.0 | ≤50 | ±0.50 | ±0.4 |
≤80 | ±1.0 | ≤80 | ±0.75 | ±0.5 |
≤100 | ±1.0 | ≤100 | ±0.80 | ±0.5 |
≤160 | ±2.0 | ≤160 | ±1.30 | ±0.8 |
≤200 | ±2.5 | ≤200 | ±1.50 | ±1.5 |
≤320 | ±2.5 | ≤320 | ±2.00 | ±2.0 |
≤500 | ±3.5 | ≤500 | ±2.50 | ±2.5 |
≤800 | ±5.0 | ≤800 | ±3.50 | ±3.0 |
＞800 | ±7.5 | ＞800 | ±5.00 | ±4.0 |
Optional treatments of finished core:
（1）Uncut, non-impregnated.
（2）Uncut, lightly impregnated with epoxy varnish.
（3）Cut, fully impregnated with epoxy resin.
（4）Multiple-cut, fully impregnated with epoxy resin.
（5）Assembled with plastic cases [PP, maximum working temperature 110℃, thickness 0.4~0.8mm].
（6）Green epoxy coating [maximum working temperature 180℃, thickness 0.20~0.50mm].
（7）Black epoxy painting.
Material:
High-quality CRGO steels with the characteristics of low iron-loss and high permeability in thickness of 0.05mm, 0.23mm, 0.27mm, and 0.3mm.
Characteristic:
It is toroidal and wound in the same direction of closed flux path. No magnetic flux leakage. It has the best magnetic performance. It is easy and high-efficiency for coil winding with the toroidal winding machine.
Application:
The toroidal core is widely used in 50Hz and 400Hz transformers, current transformers, reactors, chokes, and other magnetic components of electronic equipment.
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