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A light 3-D finite-element magnetodynamic a-$v$ model of resonant wireless power transfer (WPT) coils using a 3-D surface impedance boundary condition (SIBC) strongly coupled with an external circuit is proposed, reflecting the importance of external circuit elements (notably capacitances) in the resonance phenomena at circuit and field levels. The computational gain ensuing from the use of SIBC...
In this work, we highlight the influence of geometrical uncertainties (winding pattern and wire diameter) on the RLC parameters of wound magnetic components. To that end, the finite element method is embedded in a Monte Carlo simulation in order to compute probability distributions of the parameters. An algorithm to randomly generate realistic winding configurations is also proposed.
In this paper, the unstructured Partial Element Equivalent Circuit (PEEC) method is applied in 3D magnetodynamics to resonant Wireless Power Transfer (WPT) coils modeling. A particular attention is paid on the coupling with circuit equations in order to model the resonant conditions at the circuit and field levels. A preliminary comparison with 3D finite element method highlights the high potential...
In this work, the Non-dominated Sorting Genetic Algorithm (NSGA) is employed for the multiobjective optimal design of Resonant Inductive Power Transfer (RIPT) devices. A thorough review of the literature has been performed in order to propose accurate analytical formulae for computing the lumped parameters of the system equivalent circuit. A particular attention is paid on the representation of the...
This paper deals with a methodology to cooperatively handle the power quality issues in a multiple-inverter-based micro-grid with communication. The micro-grid operates in the grid-connected mode, being partially supplied from the main network. The conservative power theory decomposition is used to deal with both the power enhancement and renewable power integration functions. A central controller...
In this work, a virtual laboratory for modeling Wireless Power Transfer systems is presented. It is based on the Finite Element Method and is fully parametrized, so as to analyze various coil configurations. A 3D FE formulation is moreover considered in order to model coil misalignments. The numerical results are compared with analytical formula and experimental measurements.
In this paper, the power losses and mass of multiobjective optimal designed isolated dc-dc converters are compared, based on Si and SiC technologies. To that end, a computer-aided design (CAD) tool, previously published by the authors, is used. The database of the existing tool is enriched with wide band gap semiconductor devices currently available from manufacturers. The results are presented for...
This paper presents the adaptation of a previously published CAD tool that was initially conceived for high power isolated dc-dc converters, to the multiobjective optimal design of a switch-mode power supply for space application. The main changes to the existing tool concern the magnetic elements (transformer and inductor), the reduction of voltage and current ratings of the semiconductor devices,...
The aim of this paper is to propose a methodology to help the designers to choose the best-suited isolated dc-dc converter topology for given specifications. To do so, a response surface method (RSM) approach is used in combination with a multiobjective optimal design tool dedicated to such power converters and using genetic algorithms. So the response surfaces are computed based on optimized power...
Nowadays, the use of mathematical optimization techniques to design power converters becomes more and more attractive. This paper tries to go a step further in studying the influence of some specifications in the multiobjective optimal design of isolated dc-dc converters. To do so, a response surface methodology (RSM) approach is used in combination with a multiobjective optimal design tool dedicated...
This paper presents a computer-aided design (CAD) tool for the design of isolated dc-dc converters. This tool, developed in Matlab environment, is based on multiobjective optimization (MO) using Genetic Algorithms (GAs). The Elitist Nondominated Sorting Genetic Algorithm (NSGA-II) is used to perform search and optimization whereas analytical models are used to model the power converters. The design...
In this paper, mathematically rigorous R, L circuits of high frequency multi-winding transformers are numerically extracted. Two procedures based on the Finite Element Method (FEM) are investigated. In the first one, a Cholesky decomposition is applied to the resistance and inductance matrices of the device, which are obtained using a FE model. The second approach employs the FEM as a virtual laboratory...
This paper deals with the multiobjective optimal design of a voltage supply inverter (VSI) fed in-wheel motor for urban electric vehicles (EVs) using genetic algorithms (GAs). The proposed motor is an axial flux permanent magnet (AFPM) synchronous sine-wave motor. This type of motor can be directly integrated into the wheel without mechanical transmission and differential gears. The design problem...
This paper deals with the multiobjective optimal design of medium frequency (MF) transformers for isolated switch mode power supplies (SMPS). The design problem requires minimizing the weight and the loss of the transformer while ensuring the satisfaction of a number of constraints. These constraints include appropriate limits on efficiency, temperature rise and winding dimensions. The optimization...
In this work, the error made by frequency domain homogenization of windings in 2-D magnetodynamics is quantified. To that end, the homogenized fields are combined with the analytical solutions (a) of eddy currents flowing in a circular conductor placed in a uniform alternating magnetic induction (proximity effect) and (b) of current density in conductors with non-zero net current (skin effect). They...
In this contribution, we investigate the possibility of eliminating the crowbar circuit which is normally used to protect the auxiliary railway supply system in case of a catenary transient overvoltage. The idea is to act at the control level by suspending the operation of the auxiliary inverter when the input voltage reaches some given threshold. Experimental results are firstly presented for an...
Nowadays, wind energy is becoming a major contribution to balance the load with power production. However, wind production is highly fluctuating and its output can not be guaranteed at any particular time. This weather dependence of wind power makes difficult the planning between production and load. Moreover, it can also involve, in case of high wind penetration, problematic situations such as unpredicted...
This paper deals with the multiobjective optimization (MO) design of high frequency (HF) transformers using genetic algorithms (GAs). In its most general form, the design problem requires minimizing the mass or overall dimensions of the core and windings as well as the loss of the transformer while ensuring the satisfaction of a number of constraints. In this contribution, the area product (i.e. the...
This paper deals with the analytical design of an axial flux permanent magnet (AFPM) in-wheel synchronous motor for electric vehicles (EVs). AFPM motor is a pancake-type high torque density motor that fits perfectly the wheel of an automobile vehicle and that can, thus, be easily and compactly integrated into the wheel. Therefore, AFPM motor seems to be a better choice than radial flux permanent magnet...
In this paper, we present a project in which the students must determine the parameters and set up a vector control structure of a voltage-fed inverter induction motor (IM) drive using a dSPACE platform and Matlab/Simulink environment. Thanks to this platform, students can focus on the control scheme without spending too much time with details concerning the implementation of the control algorithm...
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