What is the rearrangement of parallel conductors?

After the passage of current through conductors, in addition to resistive losses, there is also eddy current loss. Regarding resistive losses, whether the winding is made with a single conductor or multiple parallel conductors, as long as the cross-sectional area and length are the same, resistive losses remain consistent. However, eddy current losses are related to the thickness of the conductor and are caused by axial leakage flux. When the thickness doubles, the eddy current losses increase fourfold. Therefore, to reduce the thickness of the conductor, it is necessary to use multiple parallel conductors when the current is high.

In multiple parallel conductors, the lengths of the conductors are generally unequal, and the induced electromotive force caused by the leakage magnetic field is also unequal. Therefore, it is necessary to perform rearrangement, i.e., exchanging the positions of conductors, to ensure that the current outputs of each conductor tend towards balance.

There are three common methods of rearrangement:

Standard rearrangement: Each conductor is sequentially rearranged, suitable for central rearrangement of circular simple, continuous, and single helical windings.

Cross rearrangement: Suitable for double helical windings.

Group rearrangement: Suitable for special rearrangement of single helical windings.

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