COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 33 Issue 4

A reduced basis method for microwave semiconductor devices with geometric variations

The Reduced Basis Method (RBM) generates low-order models of parametrized PDEs to allow for efficient evaluation of parametrized models in many-query and real-time contexts. The…

Broadband surface impedance boundary conditions for higher order time domain discontinuous Galerkin method

– The purpose of this paper is to present a time domain discontinuous Galerkin (DG) approach for modeling wideband frequency dependent surface impedance boundary conditions.

Polynomial fitting of nonlinear sources with correlating inputs

The purpose of this paper is to propose methods to improve the least square error polynomial fitting of multi-input nonlinear sources that suffer from strong correlating inputs…

Multiscale simulation of organic heterojunction light harvesting devices

The purpose of this paper is to develop a computational model for the simulation of heterojunction organic photovoltaic devices with a specific application to a light harvesting…

Index-aware model order reduction: LTI DAEs in electric networks

Model order reduction (MOR) has been widely used in the electric networks but little has been done to reduce higher index differential algebraic equations (DAEs). The paper aims…

Dielectric breakdown simulations of an OLTC in a transformer

The purpose of this paper is to report on the simulation of an on-load tap-changer (OLTC) in a power transformer. During design and test of the electrical insulation the influence…

Robust DC and efficient time-domain fast fault simulation

Imperfections in manufacturing processes may cause unwanted connections (faults) that are added to the nominal, “golden”, design of an electronic circuit. By fault simulation one…

Efficient convolution based impedance boundary conditions

– The purpose of this paper is to propose an approach based on Convolution quadrature (CQ) for the modeling and the numerical treatment of impedance boundary condition.

Optimal frequency sweep method in multi-rate circuit simulation

Radio-frequency circuits often possess a multi-rate behavior. Slow changing baseband signals and fast oscillating carrier signals often occur in the same circuit. Frequency…

Heat generation in silicon nanometric semiconductor devices

– The purpose of this paper is to deal with the self-heating of semiconductor nano-devices.

An efficient algorithm for a certain class of robust optimization problems

– The purpose of this paper is to present an efficient method for the numerical treatment of robust optimization problems with absolute reliability constraints.

Quasi 3D modelling and simulation of axial flux machines

The purpose of this paper is to investigate the theoretical foundation of the so-called quasi 3D modelling method of axial flux machines, and the means for the simulation of the…

Convergence behaviour of coupled pressure and thermal networks

The purpose of this paper is to present a method for thermal computations of power devices based on a coupling between thermal and pressure networks. The concept of the coupling…

Extended Brauer model for ferromagnetic materials: analysis and computation

The purpose of this paper is to develop a fast and accurate analytic model function for the single-valued H-B curve of ferromagnetic materials, where hysteresis can be disregarded…

Analyzing distortion contributions in a complex device model

The purpose of this paper is to propose a method to reduce the non-linear distortion of a transistor to its input and output ports to aid distortion contribution analysis (DCA)…

Modeling of streamers in transformer oil using OpenFOAM

A model for streamers based on charge transport has been developed by MIT and ABB. The purpose of this paper is to investigate the consequences of changing numerical method from…

Back-reflector design in thin-film silicon solar cells by rigorous 3D light propagation modeling

The purpose of this paper is to find an optimized thin-film amorphous silicon solar cell design by numerically optimizing the light trapping efficiency of a pyramid-structured…

A novel and fast voltage estimation scheme for assessment of power system component outages

The purpose of this paper is to pursue two following main goals: first, theorizing a new concept named as equivalent bus load in order to make a promising simplification over…

A two-step model to optimise transcutaneous electrical stimulation of the human upper arm

A novel model of the upper arm under transcutaneous electrical stimulation with multi-pad electrodes is presented and experimentally validated. The model aims at simulating and…

A multi-valve controlled saturable reactor and its harmonic optimization

As arc suppression coils (ASCs), magnetically controlled reactors (MCRs) are usually operated in the single-phase mode. Due to the lack of a third order harmonic compensation…

Distorted constriction contact resistance between clamped slabs

The purpose of this paper is the more exact evaluation of distorted constriction contact resistance between two clamped slabs or thin films, having a bi-dimensional current lines…

Efficient evaluation of the earth return mutual impedance of overhead conductors over a horizontally multilayered soil

The per-unit-length earth return mutual impedance of the overhead conductors plays an important role for analyzing electromagnetic transients or couplings of multi-conductor…

Simulation of charge packet formation in layered polymer film

The purpose of this paper is to describe a rapid and robust axisymmetric hybrid algorithm to create dynamic temporal and spatial charge distributions, or charge map, in the…

Iso-geometric shape optimization of magnetic density separators

The waste recycling industry increasingly relies on magnetic density separators. These devices generate an upward magnetic force in ferro-fluids allowing to separate the immersed…

Design and performance analysis of live model of Bessel beamformer for adaptive array system

The purpose of this paper is to design and analyze the performance of live model of Bessel beamformer for thorough comprehension of beamforming in adaptive environment and…

Control of limit cycles in buck converters

The purpose of this paper is to investigate limit cycles in digitally Proportional, Integral and Derivative (PID) controlled buck regulators. Filtering is examined as a means of…

Through silicon vias: from a physical point of view to a compact models initiation

The substrate coupling and loss in integrated circuits are analyzed. Then, the authors extract impedances between any numbers of embedded contacts. The paper aims to discuss these…

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