"Light solution for high frequencies"
In 2016 De Angeli Prodotti started to research and develop a new product called Aluminium Litz Wire.
De Angeli Prodotti is an aluminium magnet wire world leading company, and, following it’s tradition, the key of this project is substituting copper with aluminium. The main advantages are lower weights and costs without loosing product performances.
In the field of high frequencies, the conductors are subjected to skin and proximity effect: the result is a change on the current distribution that imply an higher losses due to Joule effect.
The common method, used to solve this problem, is build the conductor in multiple fine enamelled copper wire, in order to redistribute the current and so exploit the overall conductor section. As in all conductors, it’s important to keep low the electrical resistance: aluminium is a good electrical conductor and, if the cable section is opportunely designed, it can be competitive with copper. De Angeli Prodotti, in collaboration with a spin off of Università degli Studi di Padova, is developing the Aluminium Litz Wire in order to obtain the best solution in terms of efficiency, weight and costs. Up today, some tests that compare differents kind of inductors, in copper and aluminium, shown interesting results.
De Angeli Prodotti is developing a new conductor looking towards a new solution: an high number of fine aluminium magnet wire are produced on enamelling department. After that phase, they are strended using particular machines that allow to maintain unchanged the electrical insulation and guarantee the best performances.
In an high number of application, Aluminium Litz Wire allow to work with high frequencies replacing copper litz wire and so reducing costs and weight without loosing on overall efficiency.
Figure 1. De Angeli Prodotti Aluminium Litz Wire used on comparative tests
The best know how gained on the field of wire enamelling and overhead line stranding permit to guarantee the best product quality and be competitive on the market.
De Angeli Prodotti is developing an innovative Aluminium Litz Wire in collaboration with a spin off of Università degli Studi di Padova. Comparative tests at high frequencies are showing good results meaning that aluminium will be the future!