The Experts below are selected from a list of 32829 Experts worldwide ranked by ideXlab platform

Christian Vollaire - One of the best experts on this subject based on the ideXlab platform.

  • Measurements and Simulation of Common Mode Conducted Noise Emissions in Adjustable-Speed AC Drive Systems
    2009
    Co-Authors: François Costa, Chaiyan Jettanasen, Christian Vollaire, Bertrand Revol, Florent Morel
    Abstract:

    In order to efficiently reduce EMI emissions, especially common mode (CM) conducted noise emissions that are the most disturbing in any adjustable-speed drive systems, behaviour understanding and propagation path knowing of parasitic currents in the system are indispensable. In this paper, a simple CM disturbances modelling is proposed to estimate or calculate the CM noise currents. The modelling principle is based on specific experimental characterizations and on the modelling of the complete CM circuit considered as a chain of quadripolar matrices. Each part of the system is represented by a two-Port Network associated in cascade by using transfer matrix [T]. The comparison between calculations and experiments in an adjustable-speed drive system confirms effectively the validity of the proposed approach. Parametric studies carried out herein using this valid model will show in which way CM currents could be reduced or eliminated in a considered existing system.

  • Common-Mode Emissions Measurements and Simulation in Variable-Speed Drive Systems
    IEEE Transactions on Power Electronics, 2009
    Co-Authors: Chaiyan Jettanasen, François Costa, Christian Vollaire
    Abstract:

    In order to efficiently reduce electromagnetic interference emissions, especially common-mode (CM)-conducted noise emissions, which are the most disturbing in any variable-speed drive systems, the understanding of behavior and the knowledge of propagation path of parasitic currents in the system are essential. In this paper, a simple CM disturbances modeling is proposed to predict or estimate the CM noise currents. The modeling principle is based on specific experimental characterizations and the modeling of the complete CM circuit considered as a chain of quadripolar matrices. Each part of the system is represented by a two-Port Network associated in cascade using matrix [T]. The comparison between calculations and experiments in a variable-speed drive system effectively confirms the validity of the proposed approach. Parametric studies carried out herein using this valid model will show the way in which CM currents could be reduced or eliminated in a considered existing system.

  • modeling of common mode conducted noise emissions in pwm inverter fed ac motor drive systems
    European Conference on Power Electronics and Applications, 2007
    Co-Authors: J Genoulaz, François Costa, Chaiyan Jettanasen, Christian Vollaire
    Abstract:

    In order to predict the common mode (CM) noise current in large systems, a modeling principle using transfer matrix ([T]) is used. This method is based on specific experimental characterizations and on the modelling of the complete CM circuit considered as a chain of quadripolar matrices. Each part of the system is represented by a two-Port Network and associated in cascade by using matrix [T]. Two configurations of the system are investigated; system insulated from ground plane, and system taking ground effects on the CM current path into account in the model. The comparison results between calculations and experiments for the both configurations in a variable-speed drive system confirm effectively the validity of the proposed approach.

Chaiyan Jettanasen - One of the best experts on this subject based on the ideXlab platform.

  • Measurements and Simulation of Common Mode Conducted Noise Emissions in Adjustable-Speed AC Drive Systems
    2009
    Co-Authors: François Costa, Chaiyan Jettanasen, Christian Vollaire, Bertrand Revol, Florent Morel
    Abstract:

    In order to efficiently reduce EMI emissions, especially common mode (CM) conducted noise emissions that are the most disturbing in any adjustable-speed drive systems, behaviour understanding and propagation path knowing of parasitic currents in the system are indispensable. In this paper, a simple CM disturbances modelling is proposed to estimate or calculate the CM noise currents. The modelling principle is based on specific experimental characterizations and on the modelling of the complete CM circuit considered as a chain of quadripolar matrices. Each part of the system is represented by a two-Port Network associated in cascade by using transfer matrix [T]. The comparison between calculations and experiments in an adjustable-speed drive system confirms effectively the validity of the proposed approach. Parametric studies carried out herein using this valid model will show in which way CM currents could be reduced or eliminated in a considered existing system.

  • Common-Mode Emissions Measurements and Simulation in Variable-Speed Drive Systems
    IEEE Transactions on Power Electronics, 2009
    Co-Authors: Chaiyan Jettanasen, François Costa, Christian Vollaire
    Abstract:

    In order to efficiently reduce electromagnetic interference emissions, especially common-mode (CM)-conducted noise emissions, which are the most disturbing in any variable-speed drive systems, the understanding of behavior and the knowledge of propagation path of parasitic currents in the system are essential. In this paper, a simple CM disturbances modeling is proposed to predict or estimate the CM noise currents. The modeling principle is based on specific experimental characterizations and the modeling of the complete CM circuit considered as a chain of quadripolar matrices. Each part of the system is represented by a two-Port Network associated in cascade using matrix [T]. The comparison between calculations and experiments in a variable-speed drive system effectively confirms the validity of the proposed approach. Parametric studies carried out herein using this valid model will show the way in which CM currents could be reduced or eliminated in a considered existing system.

  • modeling of common mode conducted noise emissions in pwm inverter fed ac motor drive systems
    European Conference on Power Electronics and Applications, 2007
    Co-Authors: J Genoulaz, François Costa, Chaiyan Jettanasen, Christian Vollaire
    Abstract:

    In order to predict the common mode (CM) noise current in large systems, a modeling principle using transfer matrix ([T]) is used. This method is based on specific experimental characterizations and on the modelling of the complete CM circuit considered as a chain of quadripolar matrices. Each part of the system is represented by a two-Port Network and associated in cascade by using matrix [T]. Two configurations of the system are investigated; system insulated from ground plane, and system taking ground effects on the CM current path into account in the model. The comparison results between calculations and experiments for the both configurations in a variable-speed drive system confirm effectively the validity of the proposed approach.

François Costa - One of the best experts on this subject based on the ideXlab platform.

  • Measurements and Simulation of Common Mode Conducted Noise Emissions in Adjustable-Speed AC Drive Systems
    2009
    Co-Authors: François Costa, Chaiyan Jettanasen, Christian Vollaire, Bertrand Revol, Florent Morel
    Abstract:

    In order to efficiently reduce EMI emissions, especially common mode (CM) conducted noise emissions that are the most disturbing in any adjustable-speed drive systems, behaviour understanding and propagation path knowing of parasitic currents in the system are indispensable. In this paper, a simple CM disturbances modelling is proposed to estimate or calculate the CM noise currents. The modelling principle is based on specific experimental characterizations and on the modelling of the complete CM circuit considered as a chain of quadripolar matrices. Each part of the system is represented by a two-Port Network associated in cascade by using transfer matrix [T]. The comparison between calculations and experiments in an adjustable-speed drive system confirms effectively the validity of the proposed approach. Parametric studies carried out herein using this valid model will show in which way CM currents could be reduced or eliminated in a considered existing system.

  • Common-Mode Emissions Measurements and Simulation in Variable-Speed Drive Systems
    IEEE Transactions on Power Electronics, 2009
    Co-Authors: Chaiyan Jettanasen, François Costa, Christian Vollaire
    Abstract:

    In order to efficiently reduce electromagnetic interference emissions, especially common-mode (CM)-conducted noise emissions, which are the most disturbing in any variable-speed drive systems, the understanding of behavior and the knowledge of propagation path of parasitic currents in the system are essential. In this paper, a simple CM disturbances modeling is proposed to predict or estimate the CM noise currents. The modeling principle is based on specific experimental characterizations and the modeling of the complete CM circuit considered as a chain of quadripolar matrices. Each part of the system is represented by a two-Port Network associated in cascade using matrix [T]. The comparison between calculations and experiments in a variable-speed drive system effectively confirms the validity of the proposed approach. Parametric studies carried out herein using this valid model will show the way in which CM currents could be reduced or eliminated in a considered existing system.

  • modeling of common mode conducted noise emissions in pwm inverter fed ac motor drive systems
    European Conference on Power Electronics and Applications, 2007
    Co-Authors: J Genoulaz, François Costa, Chaiyan Jettanasen, Christian Vollaire
    Abstract:

    In order to predict the common mode (CM) noise current in large systems, a modeling principle using transfer matrix ([T]) is used. This method is based on specific experimental characterizations and on the modelling of the complete CM circuit considered as a chain of quadripolar matrices. Each part of the system is represented by a two-Port Network and associated in cascade by using matrix [T]. Two configurations of the system are investigated; system insulated from ground plane, and system taking ground effects on the CM current path into account in the model. The comparison results between calculations and experiments for the both configurations in a variable-speed drive system confirm effectively the validity of the proposed approach.

Krzysztof Wincza - One of the best experts on this subject based on the ideXlab platform.

  • six Port reflectometer providing enhanced power distribution
    IEEE Transactions on Microwave Theory and Techniques, 2016
    Co-Authors: Kamil Staszek, Slawomir Gruszczynski, Krzysztof Wincza
    Abstract:

    A six-Port reflectometer providing an improved power distribution is proposed. The developed six-Port Network allows for a significant enhancement of the measurement accuracy without increasing the complexity of the reflectometer’s Network. The proposed six-Port has been theoretically analyzed, designed in a stripline technique with the use of single-section coupled-line directional couplers, and fabricated. For the experimental verification, the developed six-Port has been utilized in reflection coefficient measurements in a wide frequency range, 2.5–3.5 GHz. The obtained results are very close to the reference values measured using a vector Network analyzer. Furthermore, the same measurements have been performed utilizing the classical six-Port reflectometer operating within the same frequency range. The comparison clearly shows that the proposed six-Port reflectometer provides a significantly higher measurement accuracy with respect to the classical solutions.

Tah-hsiung Chu - One of the best experts on this subject based on the ideXlab platform.

  • Port reduction methods for scattering matrix measurement of an n Port Network
    IEEE Transactions on Microwave Theory and Techniques, 2000
    Co-Authors: Tah-hsiung Chu
    Abstract:

    The Port reduction method (PRM) is a method to acquire the scattering matrix of an n-Port Network from the scattering matrix measured at a reduced Port order by terminating certain Ports. This then relaxes the instrumentation requirement and calibration procedure. As the Port order is reduced to two, the scattering matrix of an n-Port Network can be obtained from the measurement using a conventional two-Port vector Network analyzer. In this paper, we describe two novel PRMs, which can reduce the order of measured Ports to two. The experimental results show good accuracy. These two PRMs can provide a simpler calibration procedure and instrumentation than those directly using an n-Port Network analyzer. In addition, they give more accurate results than those measured by a two-Port Network analyzer with the assumption of using ideal terminators.