Searched for: collection%3Air
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document
Liu, D. (author), Polinder, H. (author), Abrahamsen, Asger Bech (author), Ferreira, J.A. (author)
This paper aims at assessing the potential of partially superconducting generators for 10 MW direct-drive wind turbines by investigating their performance for a very wide range of excitation currents. Performance indicators such as shear stress and efficiency and other generator characteristics are compared for 12 different generator topologies....
journal article 2017
document
Song, X. (author), Liu, D. (author), Polinder, H. (author), Mijatovic, Nenad (author), Holbøll, Joachim (author), Jensen, Bogi Bech (author)
Direct drive high temperature superconducting (HTS) wind turbine generators have been proposed to tackle challenges for ever increasing wind turbine ratings. Due to smaller reactances in HTS generators, higher fault currents and larger transient torques could occur if sudden short circuits happen at generator terminals. In this paper, a finite...
journal article 2017
document
Wang, X. (author), Liu, D. (author), Lahaye, D.J.P. (author), Polinder, H. (author), Ferreira, J.A. (author)
The brushless doubly-fed induction machine (DFIM) has great potential as a variable-speed generator for wind turbine applications. This special machine has a richer space-harmonic spectrum due to its special nested-loop rotor construction compared with conventional induction machines. It may result in higher iron losses, higher torque ripple and...
conference paper 2017
document
Abrahamsen, Asger Bech (author), Liu, D. (author), Magnusson, Niklas (author), Thomas, A (author), Azar, Ziad (author), Stehouwer, Ewoud (author), Hendriks, E (author), Penzkofer, A. (author), Atallah, K (author), Dragan, R.R. (author), .Clark, R.E. (author), Deng, F. (author), Chen, Z (author), Karwatzki, D. (author), Mertens, A. (author), Parker, Max (author), Finney, Stephen J. (author), Polinder, H. (author)
Innovative drive trains targeted at 10-20 MW offshore turbines are investigated in the INNWIND.EU project in order to determine the impact on the Levelized Cost of Energy (LCoE) resulting when installed in the ,North sea at 50 m of water [1]. The two main technologies studied are superconducting direct drive (SCDD)[2] and the magnetic pseudo...
abstract 2017
document
Wang, X. (author), Liu, D. (author), Lahaye, D.J.P. (author), Polinder, H. (author), Ferreira, J.A. (author)
Permanent-magnet machines with fractional slot concentrated windings are easy to manufacture. Their popularity therefore is steadily increasing. Without a proper design, however, the induced eddy-current losses in the solid rotor get rather high. The modeling and the prediction of eddy-current losses for these machines are thus very important...
conference paper 2016
document
Song, X. (author), Polinder, H. (author), Liu, D. (author), Mijatovic, Nenad (author), Holbøll, Joachim (author), Jensen, Bogi Bech (author)
Direct drive high temperature superconducting (HTS) wind turbine generators have been proposed to tackle challenges for ever increasing wind turbine ratings. Due to smaller reactances in HTS generators, higher fault currents and larger transient torques could occur if sudden short circuits happen at generator terminals. In this paper, a finite...
conference paper 2016
document
Abrahamsen, A.B. (author), Magnusson, N. (author), Liu, D. (author), Stehouwer, E. (author), Hendriks, B. (author), Polinder, H. (author)
A superconducting direct drive generator based on field windings of MgB2 superconducting tape is proposed as a solution by mounting the generator in front of the blades using a king-pin nacelle design for offshore turbines with power ratings larger than 10 MW as investigated in the INNWIND.EU project.
conference paper 2014
document
Abrahamsen, A.B. (author), Magnusson, N. (author), Jensen, B.B. (author), Liu, D. (author), Polinder, H. (author)
An MgB2 race track coil intended for demonstrating a down scaled pole of a 10 MW direct drive wind turbine generator has been designed. The coil consists of 10 double pancake coils stacked into a race track coil with a cross section of 84 mm x 80 mm. The length of the straight section is 0.5 m and the diameter of the end sections is 0.3 m....
conference paper 2014
document
Kostopoulos, D. (author), Liu, D. (author), Genani, G. (author), Polinder, H. (author)
Offshore wind is considered a vital component of the future large scale renewable generation portfolio. Intense R&D effort is occurring in both the technology and the supply chain aiming at cost reduction. The drivetrain of wind turbines is an area of continuous evolution with currently no one standard configuration in the industry. It is...
conference paper 2013
Searched for: collection%3Air
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