Performance of Wireless Charging System based on Quadrupole Coil Geometry with different Resonance Topology Approaches

An Inductive Charging System use an electromagnetic field to transfer energy between two galvanic separated objects. To ensure the energy transfer there are many possibilities to build up the coil geometry. The new coil geometry presented in this paper is based on a Quadrupole coil design which main advantage is the higher power density while power transfer. The Quadrupole itself is a configuration of superposition of two bipolar windings, orthogonal to each other. In addition to the Quadrupole coil there will be added another magnetization winding in parallel. Due to that, an additional degree of freedom to adjust the current will be outcome. Through the so-called magnetization winding it is possible to adjust the reactive current, while it is feasible to adjust the active current via the link winding, separately. This phenomenon will be disused in the later paper while the current design will be compared to common coil designs especially the series resonance topology. A numerical approach is introduced to ensure design criteria. In addition, a validation of the result is presented via FEM simulation and hardware measurement