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In this paper, a revitalization of conformal mapping methods applied to fluid flows in two dimensions is proposed. The present work addresses several important issues concerning their application for vortex particle flow solvers. Difficulties of past conformal based method are reviewed. One difficulty concerns the ability of a mapping procedure to represent(More)
Cable wound electric machines are used mainly for high voltage and direct-drive applications. They can be found in areas such as wind power, hydropower, wave power and high-voltage motors. Compared to conventional winding techniques, cable winding includes fewer manufacturing steps and is therefore likely to be better suited for automated production.(More)
The standard solution for the traction system in battery powered electric vehicles (EVs) is a two-level (2L) inverter feeding a three-phase motor. A simple and effective way to achieve a three-level (3L) inverter in battery-supplied electric vehicles consists of using two standard three-phase 2L inverters with the open-end winding connection of standard(More)
This paper describes the aims and the methodology of a major collaborative research project between the University of Queensland and Australian and Swedish industry partners, including ABB Corporate Research (Sweden), Alstom Power (Sweden and Australia), PowerLink Queensland, Stanwell Corporation, C S Energy and Tarong Energy. The project is investigating(More)
The price of rare-earth metals used in neodymium-iron-boron (NdFeB) permanent magnets (PMs) has fluctuated greatly recently. Replacing the NdFeB PMs with more abundant ferrite PMs will avoid the cost insecurity and insecurity of supply. Ferrite PMs have lower performance than NdFeB PMs and for similar performance more PM material has to be used, requiring(More)
Abstract: In this paper, a generic coordinated control method for wave energy converters is proposed, and the constraints on motion amplitudes and the hydrodynamic interaction between converters are considered. The objective of the control problem is to maximize the energy converted from ocean waves, and this is achieved by coordinating the power take-off(More)
Wei Li *, Jan Isberg, Rafael Waters, Jens Engström, Olle Svensson and Mats Leijon Division of Electricity, Department of Engineering Sciences, Swedish Centre for Electricity Energy Conversion, Uppsala University, Box 534, Uppsala SE-751 21, Sweden; Jan.Isberg@angstrom.uu.se (J.I.); rafael.waters@angstrom.uu.se (R.W.); jens.engstrom@angstrom.uu.se (J.E.);(More)