Advantages of the use of Litz wire
Reduction of the Skin effect. - In direct current, the current density is homogeneous throughout the conductor. In alternating current, and as the working frequency increases, it is observed that there is a greater concentration of density on the surface of the conductor and a decrease in the centre. This phenomenon is known as the skin effect or Kelvin effect.
This means that at high frequencies the electrons tend to circulate in the most external area of the conductor, in the form of a corona, rather than over its entire surface, which in fact reduces the effective cross-section of the conductor and increases the conductor resistance. This phenomenon can be detrimental in transmission lines connecting high-frequency devices.
The Litz wire is a braid of insulated enamelled wires which homogenises the current density and optimises the "usable surface area" of the cable. This results in a number of major advantages:
- High winding efficiency.
- Improvement of the quality factor "Q".
- Space reduction.
- Weight reduction.
- Higher current flow than with conventional cables.
- Lower temperature.
Product Range
Type of wire used:
0.025 to 2 mm diameter enamelled copper wires.
grade 1 or 2.
Solderable class F 155°C compliant with IEC 317-21.
Solderable class F 180°C compliant with IEC 317-21.
Weldable hot-melt compliant with IEC 317-35.
Class H 200°C compliant with IEC 317-13.
Thermosetting compliant with IEC 317-38.
Number of conductors: From 1 to 56000
Outside diameters: from 0.64 mm to 30 mm.
Cable cross-sections: from 0.003 mm2 to 300 mm2.
Sheaths: Stranded - Wrapped – Extruded
- NATURAL SILK: High flexibility
Operating temperature: 70°C max.
- NYLON: Fibre based on polyamide 66
Operating temperature: 180°C max.
- COTTON:
Operating temperature: 80°C max.
- POLYESTER:
Operating temperature: 130°C max.
- ARTIFICIAL SILK:
Operating temperature: 150°C max.
- ACETATE
Operating temperature: 80°C max.
- DAGLAS
Operating temperature: 155°C max.
- KAPTON
Operating temperature: 220°C max.
- MYLAR POLYESTER
Operating temperature: 130°C max.
- CETAVER
Operating temperature: 200°C max.
- NOMEX
Operating temperature: 180°C max.
- PRESSPAHN
Operating temperature: 105°C max.
- Standard PVC
Operating temperature: 80°C max.
- High temperature PVC
Operating temperature: 105°C max.
- POLYETHYLENE
Operating temperature: 60°C max.
- TEFLON FEP
Operating temperature: 200°C max.
Packaging
The wire is presented on rigid plastic coils, protected with foam and then shrink-wrapped.
Tailor-made designs
If you specify the application you want to use Litz wire for, we can advise you and propose the best alternatives in terms of the composition of the wire, the degree of temperature and the coating to be used. Do not hesitate to contact us.