Visual Design of Frequency–Coupling Coefficient and Topology Selection for Wireless High Power Transfer System
Keywords:
wireless power transfer, topology selection, coupling coefficient, modelling of electric circuitAbstract
In Wireless Power Transfer (WPT) systems, achieving high power transfer constrained by given components is still challenging, while it is possible using resonance or impedance-matching techniques if there are no constraints. This challenge motivates a visual design approach, in which the relationship between frequency and coupling coefficient is represented on a multiple-layer plane for a specified normalized power. This representation enables the detection of frequency and coupling coefficient values that achieve high power transfer. That proposed approach utilizes the load power expressions for Series–Series (S–S) and Series Parallel (S–P) topologies under parameter constraints, where the operating frequency and coupling coefficient are varied over a specified range to define the power region. The specification is incorporated as conditions on the allowable frequency and coupling coefficient ranges. The feasible operating region is then obtained by intersecting the power region with this specification. The proposed method identifies operating conditions that meet the specification and recommends alternative parameter values when the specifications cannot be fully satisfied. This method provides increased flexibility in topology selection, which can be adaptively selected based on the distribution of the feasible region under practical constraints.References
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