The paper briefly discusses the most important standards and regulations established for high-power wireless power transfer systems and introduces the main issues concerned with the conceptual design process. It analyses the electromagnetic design of the inductive magnetic coupler and proposes key formulas to optimize its electrical parameters for a particular load. The method applies to both the resistive load and the battery charging. It also suggests basic topologies for conceptual design of power electronics and discusses its proper connection to the grid. The proposed design strategy is verified by experimental laboratory measurement including analyses of the leakage magnetic field.

The paper presents optimal operating point tracking algorithm for wireless charging system using identical coupling coils providing us to meet simultaneously high efficiency and high transmitted power under varied load and detuning conditions. The proposed method is suitable either for purely resistive load or battery load and it is based on phase-shift control between the primary and the secondary voltage. The paper also gives an intuitive mathematical description of the key control idea and demonstrates its operational abilities. The proposed algorithm is finally implemented into digital signal processor (DSP) and tested on 4 kW laboratory prototype of shielded wireless power transfer system.

Presented paper discusses power distribution bus of dynamic wireless charging track for e-mobility applications. The focus is applied to the matrix converter and AC power distribution bus adaptation. The key behavior of matrix one-to-one phase converter and three-to-one phase converter is presented to get topologies for adaptation. Get matrix converter features are discussed regarding to the wireless power transfer and dynamic charging in electromobility. Feasibility of power topologies and control approaches are discussed as well. Proposed dynamic charging using three-phase matrix converter adaptation is compared to the conventional topologies using DC power distribution bus and corresponding inverters topologies. Knowledge taken from literature and theoretical discussion is verified by MATLAB–Simulink simulations and by basic experiments. Finally, feasibility study decisions are made in conclusion.

The paper proposes a design and construction of a special plated capacitor exhibiting very good high-frequency characteristics. The capacitor is designed to minimize the parasitic parameters like ESR (equivalent series resistance) and ESL (equ...

In-motion-charging (IMC) trolleybuses are battery-equipped trolleybuses whose onboard batteries are recharged from the overhead contact line (OCL) on electrified sections of the route, enabling reliable off-wire operation on the rest of the route. To avoid OCL overheating during standstill, existing charging strategies typically rely on constant or piecewise-constant current profiles derived from steady-state thermal limits; these profiles are fixed a priori and cannot exploit the transient thermal headroom available during short and unpredictable stops. This paper addresses this gap by proposing a temperature-constrained charging strategy that maximizes the energy transferred during standstill and low-speed operation without exceeding the OCL thermal limits, even when the stop duration is unknown a priori. A comprehensive experimental study was conducted to characterize the OCL’s thermal behavior and to identify a data-driven state-space model predicting the contact temperature at the wire–shoe interface. Building on this model, an optimization framework and a stepwise algorithm are proposed for direct implementation in trolleybus operation. A case study on Pilsen trolleybus lines demonstrates substantially higher charging efficiency and energy throughput than conventional constant-current control, while ensuring full compliance with the EN 50119 standard.