Utilizing Helicoidal and Translational Symmetries Together in 2-D Models of Twisted Litz Wire Strand Bundles

In this article, a helicoidally symmetric 2-D model of a twisted litz wire strand bundle is studied. Suitable foundations for compatibility tools are presented to use such a model as a part of a larger system which does not follow a helicoidal symmetry. A measure for the symmetricity of a field is proposed. This provides the foundations for the coupling of helicoidally symmetric and translationally symmetric models with good understanding of the introduced approximation error.