Mathematical model for the analysis of series–parallel compensated wireless power transfer system for different misalignments

Abstract

In recent years, the use of wireless power transfer (WPT) has gained momentum in electric vehicle charging. To design the WPT system, three-dimensional (3D) finite element method (FEM) is used for mutual inductance calculation, and the system performance is evaluated using a circuit simulator. The use of 3D FEM makes the initial design a tedious process. Hence, there is a need for a reliable analytical model which can be used in the preliminary design process. This work proposes a mathematical model of a series-parallel (SP) compensated WPT system that can determine the mutual inductance and the system parameters such as voltage, current, power, and efficiency for different misalignments. The mathematical model consists of electromagnetic and steady-state models. This model can be used to analyse the component stress of SP compensated WPT system. The results of the mathematical model are verified experimentally. Thus, the proposed method can be adopted in the initial design process of SP compensated WPT system.

Wireless Power Transmission System for Powering Rotating Parts of Automatic Machineries

“…This paper discusses the implementation of the rotary wireless power transfer for machine tool drive using a series-parallel [15][16][17][18][19][20][21][22][23] resonant inductive coupling. An exhaustive mathematical description of S-P compensation was presented by the authors in [16,18], where a comparison with other basic topologies in terms of resonance capacitor sizes, operating characteristics, and recommendations for the application area is given.…”

“…An exhaustive mathematical description of S-P compensation was presented by the authors in [16,18], where a comparison with other basic topologies in terms of resonance capacitor sizes, operating characteristics, and recommendations for the application area is given. An analytical model combining electromagnetic and steady-state modeling for the analysis of the S-P compensated wireless power transmission system for various misalignments is presented in [19]. Another analysis relating to S-P compensation is reported in [20], which compared to [16,17] also provides a flow chart of selection of compensation capacitors for different topologies and discusses relevant legislation and standards for WPT systems.…”

Analysis and Optimization of Asymmetric Wireless Power Transfer in Concrete

“…And the formulas of the mutual inductance and the transmission efficiency in the case of misalignment also were derived, and the effect of radial offset and angular misalignment was studied. A mathematical model of wireless power transfer system with series-parallel compensation network was developed, which was capable to determine the circuit parameters under various misalignment conditions in [20]. And the mathematical model was used to realize the preliminary design of the system.…”