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One turn of a helical spiral coil made of Litz wire. (a) Underlying computational wire grid with 9200 current filaments. (b) Rendered outward appearance of (a) in computer software. (c) The same but for a twisted Litz wire. Notice the twisting in the wire grid that is absent in (a); the twisting increases inductance. (d) Rendered outward appearance of (c) in the software; the surface rendering is less smooth compared to (b).
