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A high-density heat-sink-mounted inductor for automotive applications

Gerber, M. (author), Ferreira, J.A. (author), Hofsajer, I.W. (author), Seliger, N. (author)

journal article 2004

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A square-wave current inverter for aircraft-mounted electromagnetic surveying systems

Ferreira, J.A. (author), Kane, I.J. (author), Klinkert, P. (author), Hage, T.B. (author)

journal article 2004

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Design towards higher integration levels in power electronics

de Jong, E.C.W. (author), Popovic, J. (author), Ferreira, J.A. (author)

conference paper 2006

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The electric variable transmission

Hoeijmakers, M.J. (author), Ferreira, J.A. (author)

journal article 2006

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Design techniques for thermal management in switch mode converters

De Jong, E.C.W. (author), Ferreira, J.A. (author), Bauer, P. (author)

journal article 2006

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Wind turbines emulating inertia and supporting primary frequency control

Morren, J. (author), de Haan, S.W.H. (author), Kling, W.L. (author), Ferreira, J.A. (author)

journal article 2006

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Coupling of a CMOS Optical Sensor to a Micromachined Deformable Mirror with an Adaline Neural Method

De Lima Monteiro, D.W. (author), Ferreira, A.I. (author), Teixeira, F.B. (author), Melo, J.G.M. (author), Vdovin, G.V. (author)

We report on the preliminary results of an Adaline neural method for the coupling of a custom CMOS wavefront sensor to a micromachined adaptive mirror. The algorithm does not rely on a fixed basis matrix -as opposed to traditional methods-, offers excellent immunity to round-off errors and admits real-time input adaptability to speed up...

journal article 2006

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Quantum control for an experimental contactless energy transfer system for multiple users

Van der Pijl, F.F.A. (author), Bauer, P. (author), Ferreira, J.A. (author), Polinder, H. (author)

conference paper 2007

document

The electrical demand by transport on the grid after oil depletion

J.J. Wolmarans, J.J. (author), Ferreira, J.A. (author)

At the hand of a case study alternative energy sources, methods of transportation and their effect on the electricity grid oncefossilfuels have been depleted is discussed. Three methods of sustainable transport are presented. The energy requirement for each is calculated as well as the requirements from the electricity grid for traveling a 200km...

conference paper 2007

document

Control of DFIG under unsymmetrical voltage dip

Zhou, Y. (author), Bauer, P. (author), Ferreira, J.A., Pierik, J. (author)

conference paper 2007

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Analytical modeling of a permanent-magnet synchronous machine in a flywheel

Holm, S.R. (author), Polinder, H. (author), Ferreira, J.A. (author)

journal article 2007

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Direct drive wind turbine generator with magnetic bearing

Shrestha, G. (author), Polinder, H. (author), Bang, D.J. (author), Ferreira, J.A. (author)

conference paper 2007

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Efficient gradient coil driver for MRI

Bauer, P. (author), Spanjaard, S. (author), Ferreira, J.A. (author), Hollander, M. (author)

journal article 2007

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Grid-connected and islanded operation of a hybrid power system

Zhou, Y. (author), Ferreira, J.A. (author), Bauer, P. (author)

conference paper 2007

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Usability in virtual and augmented environments: A qualitative and quantitative study

Dias, P. (author), Pimentel, A. (author), Ferreira, C. (author), Van Huussen, F. (author), Baggerman, J.W. (author), Van der Horst, P. (author), Madeira, J. (author), Bidarra, R. (author), Sousa Santos, B. (author)

Virtual and Augmented Reality are developing rapidly: there is a multitude of environments and experiments in several laboratories using from simple HMD (Head-Mounted Display) visualization to more complex and expensive 6-wall projection CAVEs, and other systems. Still, there is not yet a clear emerging technology in this area, nor commercial...

conference paper 2007

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Head-mounted display versus desktop for 3D navigation in virtual reality: A user study

Sousa Santos, B. (author), Dias, P. (author), Pimentel, A. (author), Baggerman, J.W. (author), Ferreira, C. (author), Silva, S. (author), Madeira, J. (author)

Virtual Reality (VR) has been constantly evolving since its early days, and is now a fundamental technology in different application areas. User evaluation is a crucial step in the design and development of VR systems that do respond to users’ needs, as well as for identifying applications that indeed gain from the use of such technology. Yet,...

journal article 2008

document

Toward the Next Level of PCB Usage in Power Electronic Converters

De Jong, E.C.W. (author), Ferreira, B.J.A. (author), Bauer, P. (author)

A means for power electronics to exploit the level of 3-D packaging already being implemented in compact consumer products, such as digital cameras, is investigated in order to increase its power density. The increase in functionality and usage of printed circuit board (PCB) in power electronic converters is highlighted and improvements proposed...

journal article 2008

document

Power flow controller

Ferreira, J.A. (author), Yuan, Z. (author), De Haan, S.W.H. (author)

The invention relates to a power flow controller, comprising at least one first converter coupled with a power transmission line, and at least one second converter coupled with a power source, wherein said power source operates at a predeter-mined first frequency and connects to the power transmission line, said controller further comprising...

patent 2008

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Common-mode DC-bus filter design for variable-speed drive system via transfer ratio measurements

Zhao, D. (author), Ferreira, J.A. (author), Roc'h, A. (author), Leferink, F. (author)

Filters used in electromagnetic interference suppression are often described in literature on drive systems and have become a standard solution in industry. The effect of the commercial off-the-shelf filter depends significantly on how it is installed. A model that includes the installation parameters is made first and then the parameters of the...

journal article 2009

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Operation of grid-connected DFIG under unbalanced grid voltage condition

Zhou, Y. (author), Bauer, P. (author), Ferreira, J.A. (author), Pierik, J. (author)

Doubly fed induction generator (DFIG) still shares a large part in today's wind power market. It provides the benefits of variable speed operation cost-effectively, and can control its active and reactive power independently. Crowbar protection is often adopted to protect the rotor-side voltage source converter (VSC) from transient overcurrent...

journal article 2009