Searched for: department:"Electrical%5C+Sustainable%5C+Energy"
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Kumar, P. (author), Bauer, P. (author)
In this paper, we develop a comprehensive model of a permanent-magnet brushless DC (BLDC) motor. An analytical model for determining instantaneous air-gap field density is developed. This instantaneous field distribution can be further used to determine the cogging torque, induced back electromotive force, and iron losses in the motor. The...
journal article 2008
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Kumar, P. (author), Bauer, P. (author)
This work focuses on a design methodology that aids in design and development of complex engineering systems. This design methodology consists of simulation, optimization and decision making. Within this work a framework is presented in which modelling, multi-objective optimization and multi criteria decision making techniques are used to design...
journal article 2008
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Papaefthymiou, G. (author), Klöckl, B. (author)
This paper contributes a Markov chain Monte Carlo (MCMC) method for the direct generation of synthetic time series of wind power output. It is shown that obtaining a stochastic model directly in the wind power domain leads to reduced number of states and to lower order of the Markov chain at equal power data resolution. The estimation quality of...
journal article 2008
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Van den Brom, H.E. (author), Houtzager, E. (author), Brinkmeier, B.E.R. (author), Chevtchenko, O.A. (author)
AJosephson arbitrary waveform synthesizer (JAWS) has been developed in order to generate quantum-based ac voltage signals. The key component of this JAWS is a modified commercial 30-Gb/s pattern generator that can generate ternary patterns (containing the values +1, 0, and ?1, resulting in bipolar pulses). The new pulse-drive electronics have...
journal article 2008
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Verboomen, J. (author), Van Hertem, D. (author), Schavemaker, P.H. (author), King, W.L. (author), Belmans, R. (author)
Analytical expressions are derived to gain insight in the operating principles of phase shifting transformers (PSTs) in a highly meshed grid. To this extent, the dc load flow algorithm is adapted to account for such devices. This leads to a linear expression for the relation between PST settings and the active power flow in the lines. Based on...
journal article 2008
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Klaver, A. (author), Nádaždy, V. (author), Zeman, M. (author), Swaaiij, R.A.C.M.M. (author)
We present a study of changes in the defect density of states in hydrogenated amorphous silicon (a-Si:H) due to high-energy electron irradiation using charged deep-level transient spectroscopy. It was found that defect states near the conduction band were removed, while in other band gap regions the defect-state density increased. A similar...
journal article 2006
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Khan, R.U.A. (author), Silva, S.R.P. (author), Van Swaaij, R.A.C.M.M. (author)
Amorphous carbon (a-C) has been shown to be intrinsically p-type, and polymeric a-C (PAC) possesses a wide Tauc band gap of 2.6 eV. We have replaced the p-type amorphous silicon carbide layer of a standard amorphous silicon solar cell with an intrinsic ultrathin layer of PAC. The thickness of the p layer had to be reduced from 9 to 2.5 nm in...
journal article 2003
Searched for: department:"Electrical%5C+Sustainable%5C+Energy"
(181 - 187 of 187)

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