Alex Van den Bossche | Ghent University (original) (raw)

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Papers by Alex Van den Bossche

Research paper thumbnail of Eddy Currents in Conductors Introduction

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Research paper thumbnail of Coil Winding and Electrical Insultion Filling Factor

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Research paper thumbnail of Fast Design Approach Including Eddy Current Losses Fast Design Approach

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Research paper thumbnail of Parasitic Capacitances in Magnetic Components Capacitance Between Windings: Inter Capacitance

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Research paper thumbnail of Optimal Copper/Core Loss Ratio in Magnetic Components Simplified Approach

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Research paper thumbnail of Inductor Design Air Coils and Related Shapes

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Research paper thumbnail of Copper Wires Data

CRC Press eBooks, Mar 24, 2005

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Research paper thumbnail of Successive resistive braking circuit for permanent magnet wind turbine generators

An electric brake for wind turbine systems is proposed in this paper. Effective emergency electri... more An electric brake for wind turbine systems is proposed in this paper. Effective emergency electrical braking is needed if an overvoltage occurs due to grid failure. The derived circuits use high power thyristors corresponding to the high values of generated power from today's wind turbines. A practical confirmation with BLDC a generator is ongoing in the laboratory. The principle of

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Research paper thumbnail of Eddy current losses and inductance of gapped foil inductors

ABSTRACT The aim of this paper is to present analytical solutions for eddy current losses in foil... more ABSTRACT The aim of this paper is to present analytical solutions for eddy current losses in foil windings of gapped inductors and solutions for additional inductance because of the fringing field path by using Fourier expansion in space. This allows avoiding the well-known disadvantages of the numerical field calculations such as long computation times, difficult geometry modelling, complex parameterisation.

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Research paper thumbnail of Fast Design Approach Including Eddy Current Losses

CRC Press eBooks, Mar 24, 2005

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Research paper thumbnail of Eddy Currents in Conductors

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Research paper thumbnail of Soft Magnetic Materials

CRC Press eBooks, Mar 24, 2005

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Research paper thumbnail of Improved calculation of winding losses in gapped inductors

Journal of Applied Physics, May 15, 2005

Field patterns in gapped inductors are more complicated than the fields in transformers, thus the... more Field patterns in gapped inductors are more complicated than the fields in transformers, thus the winding losses in inductors are given with higher complexity. An improved presentation of winding losses in inductors is reported, using a correction loss factor. The full expression of that correction loss factor, called kF, is tuned using FEM calculations. An approximation of kF as a function of a parameter κ is provided. The parameter is depending on the sum of the distance coil–air gap and 1∕3 winding thickness, divided by the window width. The features of the approach are the fast and straight winding loss calculation combined with sufficient accuracy and wide application for gapped inductors with different frequencies, wire diameters, conductor fittings, and core and air gap constructions.

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Research paper thumbnail of Influence of operating frequency on design of power electronic transformers

Journal of physics, Oct 1, 2017

The influence of operating frequency on parameters of power electronic transformers is investigat... more The influence of operating frequency on parameters of power electronic transformers is investigated. An improved fast design algorithm is used to calculate competitive transformer designs based on ferrite cores and round wires under the same input parameters, while varying the operating frequency in a wide range (25 kHz to 400 kHz). Two sets of designs are compared: for a 400W and a1200W full bridge converter. Specific optimization approaches are proposed to decrease eddy current losses in wires by interleaving windings.

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Research paper thumbnail of Analytical simulation and experimental comparison of the losses in resonant DC/DC converter with Si and SiC switches

High efficiency is among the most important targets in power electronic converters. A possible ap... more High efficiency is among the most important targets in power electronic converters. A possible approach to obtain this goal is the usage of better switches. This paper is focused at the study and comparison of SiC and Si power MOSFETS in soft switching resonant DC/DC converter. The latter converter being a part of light battery charger used in ultra-light electric vehicles is realized and investigated. The losses in the power switches are compared mathematically, with simulations and experimental verification. Two types of transistors are considered. First traditional state of the art Si-technology using a FREDFET (fast recovery diode MOSFET) and it is compared with what the SiC technology offers, using a fast Schottky antiparallel diode. As an example a 1500 W series resonance converter with input voltage of 400 V and output voltage of 100 V is used. The latter voltage permitting the use of Schottky diodes at the secondary side. The losses in both converters are compared via calorimetic measurements to avoid accuracy problems as in loss measurements with an oscilloscope for example.

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Research paper thumbnail of Battery Management Systems and Inductive Balancing

Institution of Engineering and Technology eBooks, Nov 16, 2021

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Research paper thumbnail of Investigation of magnetic and static characteristics in three-phase switched reluctance motors under different winding connections

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Research paper thumbnail of Switched reluctance machine configurations with higher number of rotor poles

International Conference on Communications, 2018

In the recent days, Switched Reluctance Machines (SRMs) occupy a great interest in several indust... more In the recent days, Switched Reluctance Machines (SRMs) occupy a great interest in several industrial applications thanks to their several advantages such as simple and robust construction, low cost, high reliability, and easy cooling. However, SRMs have also drawbacks such as some challenges in their control, high acoustic noise, high levels of torque ripple and vibrations. Compared to the conventional switched reluctance machines with higher stator pole number than the rotor, in this paper a new family of SRMs with higher number of rotor poles than stator is introduced. The 12/16 SRM has been designed and simulated by means of Finite element method (FEM). In addition, the performance of 12/8 and 12/16 SRMs has been compared.

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Research paper thumbnail of Using LoRa technology for the smart monitoring and control of a photovoltaic inverter system

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Research paper thumbnail of Design and application of a bootstrap circuit controlled by PIC24 for a grid inverter

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Research paper thumbnail of Eddy Currents in Conductors Introduction

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Research paper thumbnail of Coil Winding and Electrical Insultion Filling Factor

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Fast Design Approach Including Eddy Current Losses Fast Design Approach

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Parasitic Capacitances in Magnetic Components Capacitance Between Windings: Inter Capacitance

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Optimal Copper/Core Loss Ratio in Magnetic Components Simplified Approach

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Research paper thumbnail of Inductor Design Air Coils and Related Shapes

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Research paper thumbnail of Copper Wires Data

CRC Press eBooks, Mar 24, 2005

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Successive resistive braking circuit for permanent magnet wind turbine generators

An electric brake for wind turbine systems is proposed in this paper. Effective emergency electri... more An electric brake for wind turbine systems is proposed in this paper. Effective emergency electrical braking is needed if an overvoltage occurs due to grid failure. The derived circuits use high power thyristors corresponding to the high values of generated power from today's wind turbines. A practical confirmation with BLDC a generator is ongoing in the laboratory. The principle of

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Research paper thumbnail of Eddy current losses and inductance of gapped foil inductors

ABSTRACT The aim of this paper is to present analytical solutions for eddy current losses in foil... more ABSTRACT The aim of this paper is to present analytical solutions for eddy current losses in foil windings of gapped inductors and solutions for additional inductance because of the fringing field path by using Fourier expansion in space. This allows avoiding the well-known disadvantages of the numerical field calculations such as long computation times, difficult geometry modelling, complex parameterisation.

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Research paper thumbnail of Fast Design Approach Including Eddy Current Losses

CRC Press eBooks, Mar 24, 2005

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Research paper thumbnail of Eddy Currents in Conductors

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Research paper thumbnail of Soft Magnetic Materials

CRC Press eBooks, Mar 24, 2005

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Research paper thumbnail of Improved calculation of winding losses in gapped inductors

Journal of Applied Physics, May 15, 2005

Field patterns in gapped inductors are more complicated than the fields in transformers, thus the... more Field patterns in gapped inductors are more complicated than the fields in transformers, thus the winding losses in inductors are given with higher complexity. An improved presentation of winding losses in inductors is reported, using a correction loss factor. The full expression of that correction loss factor, called kF, is tuned using FEM calculations. An approximation of kF as a function of a parameter κ is provided. The parameter is depending on the sum of the distance coil–air gap and 1∕3 winding thickness, divided by the window width. The features of the approach are the fast and straight winding loss calculation combined with sufficient accuracy and wide application for gapped inductors with different frequencies, wire diameters, conductor fittings, and core and air gap constructions.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Influence of operating frequency on design of power electronic transformers

Journal of physics, Oct 1, 2017

The influence of operating frequency on parameters of power electronic transformers is investigat... more The influence of operating frequency on parameters of power electronic transformers is investigated. An improved fast design algorithm is used to calculate competitive transformer designs based on ferrite cores and round wires under the same input parameters, while varying the operating frequency in a wide range (25 kHz to 400 kHz). Two sets of designs are compared: for a 400W and a1200W full bridge converter. Specific optimization approaches are proposed to decrease eddy current losses in wires by interleaving windings.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Analytical simulation and experimental comparison of the losses in resonant DC/DC converter with Si and SiC switches

High efficiency is among the most important targets in power electronic converters. A possible ap... more High efficiency is among the most important targets in power electronic converters. A possible approach to obtain this goal is the usage of better switches. This paper is focused at the study and comparison of SiC and Si power MOSFETS in soft switching resonant DC/DC converter. The latter converter being a part of light battery charger used in ultra-light electric vehicles is realized and investigated. The losses in the power switches are compared mathematically, with simulations and experimental verification. Two types of transistors are considered. First traditional state of the art Si-technology using a FREDFET (fast recovery diode MOSFET) and it is compared with what the SiC technology offers, using a fast Schottky antiparallel diode. As an example a 1500 W series resonance converter with input voltage of 400 V and output voltage of 100 V is used. The latter voltage permitting the use of Schottky diodes at the secondary side. The losses in both converters are compared via calorimetic measurements to avoid accuracy problems as in loss measurements with an oscilloscope for example.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Battery Management Systems and Inductive Balancing

Institution of Engineering and Technology eBooks, Nov 16, 2021

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Investigation of magnetic and static characteristics in three-phase switched reluctance motors under different winding connections

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Switched reluctance machine configurations with higher number of rotor poles

International Conference on Communications, 2018

In the recent days, Switched Reluctance Machines (SRMs) occupy a great interest in several indust... more In the recent days, Switched Reluctance Machines (SRMs) occupy a great interest in several industrial applications thanks to their several advantages such as simple and robust construction, low cost, high reliability, and easy cooling. However, SRMs have also drawbacks such as some challenges in their control, high acoustic noise, high levels of torque ripple and vibrations. Compared to the conventional switched reluctance machines with higher stator pole number than the rotor, in this paper a new family of SRMs with higher number of rotor poles than stator is introduced. The 12/16 SRM has been designed and simulated by means of Finite element method (FEM). In addition, the performance of 12/8 and 12/16 SRMs has been compared.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Using LoRa technology for the smart monitoring and control of a photovoltaic inverter system

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Design and application of a bootstrap circuit controlled by PIC24 for a grid inverter

Bookmarks Related papers MentionsView impact