Nonlinear two-step simulation model of a resonant converter for IPT Systems

The electrification of the automotive industry brings the promising inductive power transfer (IPT) technology in the focus of future battery charging applications. However, establishing IPT systems is only possible if similar efficiency, compared to conductive charging, can be achieved. Hence, the design of IPT systems needs to be further examined. This paper presents a novel two-step simulation method of resonant converters for IPT systems. First, the magnetic domain, respectively the coil system, is simulated with finite element analysis (FEA), where saturation effects, misalignment and the geometric design can be taken into account. In the second step, the results are imported into a network circuit domain to analyze the complete resonant converter, with the possibility of studying dynamic effects. Main advantage of this method is the consideration of nonlinearities from the time consuming FEA in the faster network circuit domain, which leads to more precise results while requiring less simulation time.