Houndreds or thousands of elementary conductors to win skin effect!
In an electrical winding, the number of turns and the magnetic flux are inversely proportional to the frequency of the current.
High frequency applications are increasingly widespread in the world of power electronics, their use greatly reduces dimensions. Working at higher frequencies means reducing the size of the transformer.
Litz cables (or Litz wires) fulfill this purpose perfectly. They consist of many strands of thin enamelled round wires, which are twisted and intertwined with each other.
Hundreds or thousands of elementary conductors isolated from each other allows to reduce losses in the transmission of alternate current, avoiding the skin effect.
The concept behind the Litz cable is very simple: to constitute a stranded wire in which the fundamental units are enamelled wires with a diameter smaller than the skin effect.
In this way Litz wire will not suffer from this phenomenon and the losses in high frequency will be significantly reduced.
Below is an example of the possible solutions offered by De Angeli Prodotti:
Spec. Resistance [Ωmm2/m]
Insulation type for the individual wires
Thermal class [°C]
Enamel build: Grade 1, Grade 2, Grade 3
External insulation type
25 – 38 – 50
And much more!
Silicone extrusion after taping is possible
Thanks to its extraordinary features, the litz allows to build electrical machines otherwise impossible with a traditional conductor.
The intertwining of hundreds or thousands of elementary conductors isolated from each other so this eliminates the skin effect and to work very well at frequencies up to 1 MHz.
Contact us to find the litz wire fitting your needs!