A salient difficulty in designing high-frequency inductors and transformers is eddy-current effects in windings. These effects include skin-effect losses and proximity-effect losses. Both effects can be controlled by using Litz wire—conductors made up of multiple individually insulated strands twisted or woven together.
This paper authored by C. R. Sullivan:
- addresses the choice of the degree of stranding in Litz wire for a transformer winding and
- presents a method of finding that optimum, using standard methods of estimating the eddy-current losses.
– IEEE Transactions on Power Electronics, vol. 14, no. 2, pp. 283–291.
