The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform

S N Manias - One of the best experts on this subject based on the ideXlab platform.

  • a novel four level voltage source inverter influence of switching strategies on the Distribution of Power losses
    IEEE Transactions on Power Electronics, 2007
    Co-Authors: G S Perantzakis, F H Xepapas, S N Manias
    Abstract:

    In this paper, a novel four-level inverter will be presented and analyzed. The proposed inverter topology, which is composed of a conventional two-level and a three-level neutral-point clamped (NPC) inverter, is suitable for high-voltage and high-Power applications. The proposed inverter, when it is compared with the conventional four-level NPC pulsewidth modulation inverter, exhibits the following advantages: a) ability of changing the Power losses Distribution profile among the devices by selecting a suitable switching strategy; b) reduction of total inverter Power semiconductor device losses; c) ability of bidirectional operation for all Power semiconductor switches; and d) easy implementation using existing Power semiconductor modules. The effect of conduction and switching losses profiles of the proposed inverter for different switching strategies is examined under different loads, Power factors, and modulation indices. The dc-link capacitors voltages are effectively balanced via a proposed self-voltage balancing topology, without the need of isolated dc voltage sources or additional voltage stabilizing circuits. Finally, the theoretical results are confirmed by simulation and experimental results

Peter Chochula - One of the best experts on this subject based on the ideXlab platform.

  • The silicon pixel detector (SPD) for the ALICE experiment
    Journal of Physics G, 2004
    Co-Authors: Vito Manzari, G. Anelli, Federico Antinori, A. Boccardi, G. E. Bruno, M. Burns, Ivan Amos Cali, M. Campbell, Michele Caselle, Peter Chochula
    Abstract:

    The ALICE silicon pixel detector (SPD) constitutes the two innermost layers of the inner tracking system (ITS). The basic building block of the SPD is the half-stave carrying two detector ladders. The half-stave is equipped with a multi-chip module (MCM) and an optical fibre link for control and readout. A 5-layer aluminium/polyimide bus ensures the Distribution of Power and signals on each half-stave. The half-staves are mounted on a light-weight carbon-fibre structure with an integrated evaporative cooling system. An overview of the SPD development and the current status of the construction are presented.

  • The silicon pixel detector (SPD) for the ALICE experiment V Manzari (for SPD project in the ALICE Collaboration) 1
    2004
    Co-Authors: G. Anelli, Federico Antinori, A. Boccardi, G. E. Bruno, M. Campbell, Michele Caselle, Peter Chochula, M. Cinausero, A. Dalessandro, R Dinapoli
    Abstract:

    The ALICE silicon pixel detector (SPD) constitutes the two innermost layers of the inner tracking system (ITS). The basic building block of the SPD is the half-stave carrying two detector ladders. The half-stave is equipped with a multi-chip module (MCM) and an optical fibre link for control and readout. A 5-layer aluminium/polyimide bus ensures the Distribution of Power and signals on each half-stave. The half-staves are mounted on a light-weight carbon-fibre structure with an integrated evaporative cooling system. An overview of the SPD development and the current status of the construction are presented.

G S Perantzakis - One of the best experts on this subject based on the ideXlab platform.

  • a novel four level voltage source inverter influence of switching strategies on the Distribution of Power losses
    IEEE Transactions on Power Electronics, 2007
    Co-Authors: G S Perantzakis, F H Xepapas, S N Manias
    Abstract:

    In this paper, a novel four-level inverter will be presented and analyzed. The proposed inverter topology, which is composed of a conventional two-level and a three-level neutral-point clamped (NPC) inverter, is suitable for high-voltage and high-Power applications. The proposed inverter, when it is compared with the conventional four-level NPC pulsewidth modulation inverter, exhibits the following advantages: a) ability of changing the Power losses Distribution profile among the devices by selecting a suitable switching strategy; b) reduction of total inverter Power semiconductor device losses; c) ability of bidirectional operation for all Power semiconductor switches; and d) easy implementation using existing Power semiconductor modules. The effect of conduction and switching losses profiles of the proposed inverter for different switching strategies is examined under different loads, Power factors, and modulation indices. The dc-link capacitors voltages are effectively balanced via a proposed self-voltage balancing topology, without the need of isolated dc voltage sources or additional voltage stabilizing circuits. Finally, the theoretical results are confirmed by simulation and experimental results

G. Anelli - One of the best experts on this subject based on the ideXlab platform.

  • The silicon pixel detector (SPD) for the ALICE experiment
    Journal of Physics G, 2004
    Co-Authors: Vito Manzari, G. Anelli, Federico Antinori, A. Boccardi, G. E. Bruno, M. Burns, Ivan Amos Cali, M. Campbell, Michele Caselle, Peter Chochula
    Abstract:

    The ALICE silicon pixel detector (SPD) constitutes the two innermost layers of the inner tracking system (ITS). The basic building block of the SPD is the half-stave carrying two detector ladders. The half-stave is equipped with a multi-chip module (MCM) and an optical fibre link for control and readout. A 5-layer aluminium/polyimide bus ensures the Distribution of Power and signals on each half-stave. The half-staves are mounted on a light-weight carbon-fibre structure with an integrated evaporative cooling system. An overview of the SPD development and the current status of the construction are presented.

  • The silicon pixel detector (SPD) for the ALICE experiment V Manzari (for SPD project in the ALICE Collaboration) 1
    2004
    Co-Authors: G. Anelli, Federico Antinori, A. Boccardi, G. E. Bruno, M. Campbell, Michele Caselle, Peter Chochula, M. Cinausero, A. Dalessandro, R Dinapoli
    Abstract:

    The ALICE silicon pixel detector (SPD) constitutes the two innermost layers of the inner tracking system (ITS). The basic building block of the SPD is the half-stave carrying two detector ladders. The half-stave is equipped with a multi-chip module (MCM) and an optical fibre link for control and readout. A 5-layer aluminium/polyimide bus ensures the Distribution of Power and signals on each half-stave. The half-staves are mounted on a light-weight carbon-fibre structure with an integrated evaporative cooling system. An overview of the SPD development and the current status of the construction are presented.

M A Lingku - One of the best experts on this subject based on the ideXlab platform.

  • new method for dynamic non uniform subband decomposition based on Distribution of Power spectral density
    Journal of Computer Applications, 2014
    Co-Authors: M A Lingku
    Abstract:

    In order to solve the subband decomposition problem of the wideband signal with a large spectrum scope, a new method for nun-uniform subband decomposition based on Power Spectral Density( PSD) was proposed to dynamically adjust the number and bandwidth of subband, reasonably control the autocorrelation matrix eigenvalue spread of subband signals and improve the performance and efficiency of subband signal processing. For a given sequence, the number of subbands and the spectrum range of subband were determined through Power spectrum estimation. Then the subband signal was shifted to zero frequency using subband modulation to achieve signal decomposition. The eigenvalue spread of subband signal and signal reconstruction performance were analyzed using Matlab. The experimental results show that, compared with the existing methods with equal number of subbands, the proposed one using the Distribution information of PSD can effectively control the eigenvalue spread of subband while maintaining well signal reconstruction performance.