Application of Multi-Branch Cauer Circuits in the Analysis of Electromagnetic Transducers Used in Wireless Transfer Power Systems

Abstract

In this paper, the feasibility of applying a multi-branch equivalent model employing first- and second-order Cauer circuits for the analysis of electromagnetic transducers used in systems of wireless power transfer is discussed. A method of formulating an equivalent model (EqM) is presented, and an example is shown for a wireless power transfer system (WPTS) consisting of an air transformer with field concentrators. A method is proposed to synthesize the EqM of the considered transducer based on the time-harmonic field model, an optimization algorithm employing the evolution strategy (ES) and the equivalent Cauer circuits. A comparative analysis of the performance of the considered WPTS under high-frequency voltage supply calculated using the proposed EqM and a 3D field model in the time domain using the finite element method (FEM) was carried out. The selected results of the conducted analysis are presented and discussed.

Finite element analysis and experimental verification of high reliability synchronous reluctance machine

“…stepper motors [38], brushless direct current machines [11,30], levitation systems (linear motors) [31] as well as in wireless power transfer systems [17], magnetic field excitation systems [23] and other electromagnetic converters.…”

“…The research on multiphase SynRM machines is in its early stages and requires, due to the complexity of their control algorithms [40,42,44], the development of reliable models of the electromagnetic phenomena occurring. The use of field [16] and field-circuit models [17] due to the precise representation of electromagnetic phenomena allows to obtain reliable results [49]. Unfortunately, calculations using field models based on FEM are very time-consuming and therefore not possible to implement directly in control systems of SynRM.…”