26

04/00

Multilayer winding:

The winding pitch is equal to the wire diameter. The coil is wound with several layers. This leads to

parasitic capacitances between the layers in addition to the turn-to-turn capacitances. In compari-

son to all other types of winding, this type leads to the highest capacitances and thus the lowest

resonance frequencies.

Random winding:

The winding pitch is smaller than the wire diameter. The coil is wound in one direction only. This

method of winding a coil does not permit the final position of a turn to be predetermined exactly. The

cross section of this type of winding clearly shows a disorderly, “random” arrangement of the turns.

This leads to the parasitic capacitances being only minimally greater than those achieved by single-

layer winding, and the resonance frequencies are equal to those achieved by single-layer winding.

2 3 4 5 6 7 8 9 10

19 18 17 16 15 14 13 12

1

11

2 3 4 5 6 7 8 9 10

19 18 17 16 15 14 13 12

1

11

2 3 5 6 8 10 11 13 14

4

7 9

12

1

2 3 5 6 8 10 11 13 14

4

7 9

14

12

16

1

18

15 17 19

15 17 19

16 18

General Technical Information