Coupling Transformer

14,000,000 Leading Edge Experts on the ideXlab platform

Scan Science and Technology

Contact Leading Edge Experts & Companies

Scan Science and Technology

Contact Leading Edge Experts & Companies

The Experts below are selected from a list of 4164 Experts worldwide ranked by ideXlab platform

Chuntaek Rim - One of the best experts on this subject based on the ideXlab platform.

  • new cross segmented power supply rails for roadway powered electric vehicles
    IEEE Transactions on Power Electronics, 2013
    Co-Authors: Su Y Choi, Jin Huh, Wonji Lee, Seungwoo Lee, Chuntaek Rim
    Abstract:

    New cross-segmented power supply rails for roadway-powered electric vehicles are proposed in this paper for reducing construction cost and EMF. The proposed rail consists of two pairs of power cables, core, bidirectional power switches, a Transformer, capacitors, and harness. Each rail is connected through a switch box, which can change the current direction of a pair of power cables. Hence, adding the current of the two pairs of power cables results in the activation mode while nullifying it does the silence mode. A Coupling Transformer with two capacitors is introduced to compensate the variable line inductance of the rail due to the change of current direction. Therefore, multiple rails can be concurrently activated by selective turning-on and turning-off the power switches using an inverter. In addition, the EMF for the silence mode is drastically reduced if a twisted pair of power cables and copper nets is used, so that the ICNIRP guideline 6.25 μT at 20-kHz operating frequency can be met. The proposed cross-segmented power supply rail was implemented for experiments and verified for practical applications.

  • new cross segmented power supply rails for roadway powered electric vehicles
    IEEE Transactions on Power Electronics, 2013
    Co-Authors: Su Y Choi, Jin Huh, Wonji Lee, Sungwoo Lee, Chuntaek Rim
    Abstract:

    New cross-segmented power supply rails for roadway-powered electric vehicles are proposed in this paper for reducing construction cost and EMF. The proposed rail consists of two pairs of power cables, core, bidirectional power switches, a Transformer, capacitors, and harness. Each rail is connected through a switch box, which can change the current direction of a pair of power cables. Hence, adding the current of the two pairs of power cables results in the activation mode while nullifying it does the silence mode. A Coupling Transformer with two capacitors is introduced to compensate the variable line inductance of the rail due to the change of current direction. Therefore, multiple rails can be concurrently activated by selective turning-on and turning-off the power switches using an inverter. In addition, the EMF for the silence mode is drastically reduced if a twisted pair of power cables and copper nets is used, so that the ICNIRP guideline 6.25 μT at 20-kHz operating frequency can be met. The proposed cross-segmented power supply rail was implemented for experiments and verified for practical applications.

Su Y Choi - One of the best experts on this subject based on the ideXlab platform.

  • new cross segmented power supply rails for roadway powered electric vehicles
    IEEE Transactions on Power Electronics, 2013
    Co-Authors: Su Y Choi, Jin Huh, Wonji Lee, Seungwoo Lee, Chuntaek Rim
    Abstract:

    New cross-segmented power supply rails for roadway-powered electric vehicles are proposed in this paper for reducing construction cost and EMF. The proposed rail consists of two pairs of power cables, core, bidirectional power switches, a Transformer, capacitors, and harness. Each rail is connected through a switch box, which can change the current direction of a pair of power cables. Hence, adding the current of the two pairs of power cables results in the activation mode while nullifying it does the silence mode. A Coupling Transformer with two capacitors is introduced to compensate the variable line inductance of the rail due to the change of current direction. Therefore, multiple rails can be concurrently activated by selective turning-on and turning-off the power switches using an inverter. In addition, the EMF for the silence mode is drastically reduced if a twisted pair of power cables and copper nets is used, so that the ICNIRP guideline 6.25 μT at 20-kHz operating frequency can be met. The proposed cross-segmented power supply rail was implemented for experiments and verified for practical applications.

  • new cross segmented power supply rails for roadway powered electric vehicles
    IEEE Transactions on Power Electronics, 2013
    Co-Authors: Su Y Choi, Jin Huh, Wonji Lee, Sungwoo Lee, Chuntaek Rim
    Abstract:

    New cross-segmented power supply rails for roadway-powered electric vehicles are proposed in this paper for reducing construction cost and EMF. The proposed rail consists of two pairs of power cables, core, bidirectional power switches, a Transformer, capacitors, and harness. Each rail is connected through a switch box, which can change the current direction of a pair of power cables. Hence, adding the current of the two pairs of power cables results in the activation mode while nullifying it does the silence mode. A Coupling Transformer with two capacitors is introduced to compensate the variable line inductance of the rail due to the change of current direction. Therefore, multiple rails can be concurrently activated by selective turning-on and turning-off the power switches using an inverter. In addition, the EMF for the silence mode is drastically reduced if a twisted pair of power cables and copper nets is used, so that the ICNIRP guideline 6.25 μT at 20-kHz operating frequency can be met. The proposed cross-segmented power supply rail was implemented for experiments and verified for practical applications.

Wonji Lee - One of the best experts on this subject based on the ideXlab platform.

  • new cross segmented power supply rails for roadway powered electric vehicles
    IEEE Transactions on Power Electronics, 2013
    Co-Authors: Su Y Choi, Jin Huh, Wonji Lee, Seungwoo Lee, Chuntaek Rim
    Abstract:

    New cross-segmented power supply rails for roadway-powered electric vehicles are proposed in this paper for reducing construction cost and EMF. The proposed rail consists of two pairs of power cables, core, bidirectional power switches, a Transformer, capacitors, and harness. Each rail is connected through a switch box, which can change the current direction of a pair of power cables. Hence, adding the current of the two pairs of power cables results in the activation mode while nullifying it does the silence mode. A Coupling Transformer with two capacitors is introduced to compensate the variable line inductance of the rail due to the change of current direction. Therefore, multiple rails can be concurrently activated by selective turning-on and turning-off the power switches using an inverter. In addition, the EMF for the silence mode is drastically reduced if a twisted pair of power cables and copper nets is used, so that the ICNIRP guideline 6.25 μT at 20-kHz operating frequency can be met. The proposed cross-segmented power supply rail was implemented for experiments and verified for practical applications.

  • new cross segmented power supply rails for roadway powered electric vehicles
    IEEE Transactions on Power Electronics, 2013
    Co-Authors: Su Y Choi, Jin Huh, Wonji Lee, Sungwoo Lee, Chuntaek Rim
    Abstract:

    New cross-segmented power supply rails for roadway-powered electric vehicles are proposed in this paper for reducing construction cost and EMF. The proposed rail consists of two pairs of power cables, core, bidirectional power switches, a Transformer, capacitors, and harness. Each rail is connected through a switch box, which can change the current direction of a pair of power cables. Hence, adding the current of the two pairs of power cables results in the activation mode while nullifying it does the silence mode. A Coupling Transformer with two capacitors is introduced to compensate the variable line inductance of the rail due to the change of current direction. Therefore, multiple rails can be concurrently activated by selective turning-on and turning-off the power switches using an inverter. In addition, the EMF for the silence mode is drastically reduced if a twisted pair of power cables and copper nets is used, so that the ICNIRP guideline 6.25 μT at 20-kHz operating frequency can be met. The proposed cross-segmented power supply rail was implemented for experiments and verified for practical applications.

Jin Huh - One of the best experts on this subject based on the ideXlab platform.

  • new cross segmented power supply rails for roadway powered electric vehicles
    IEEE Transactions on Power Electronics, 2013
    Co-Authors: Su Y Choi, Jin Huh, Wonji Lee, Seungwoo Lee, Chuntaek Rim
    Abstract:

    New cross-segmented power supply rails for roadway-powered electric vehicles are proposed in this paper for reducing construction cost and EMF. The proposed rail consists of two pairs of power cables, core, bidirectional power switches, a Transformer, capacitors, and harness. Each rail is connected through a switch box, which can change the current direction of a pair of power cables. Hence, adding the current of the two pairs of power cables results in the activation mode while nullifying it does the silence mode. A Coupling Transformer with two capacitors is introduced to compensate the variable line inductance of the rail due to the change of current direction. Therefore, multiple rails can be concurrently activated by selective turning-on and turning-off the power switches using an inverter. In addition, the EMF for the silence mode is drastically reduced if a twisted pair of power cables and copper nets is used, so that the ICNIRP guideline 6.25 μT at 20-kHz operating frequency can be met. The proposed cross-segmented power supply rail was implemented for experiments and verified for practical applications.

  • new cross segmented power supply rails for roadway powered electric vehicles
    IEEE Transactions on Power Electronics, 2013
    Co-Authors: Su Y Choi, Jin Huh, Wonji Lee, Sungwoo Lee, Chuntaek Rim
    Abstract:

    New cross-segmented power supply rails for roadway-powered electric vehicles are proposed in this paper for reducing construction cost and EMF. The proposed rail consists of two pairs of power cables, core, bidirectional power switches, a Transformer, capacitors, and harness. Each rail is connected through a switch box, which can change the current direction of a pair of power cables. Hence, adding the current of the two pairs of power cables results in the activation mode while nullifying it does the silence mode. A Coupling Transformer with two capacitors is introduced to compensate the variable line inductance of the rail due to the change of current direction. Therefore, multiple rails can be concurrently activated by selective turning-on and turning-off the power switches using an inverter. In addition, the EMF for the silence mode is drastically reduced if a twisted pair of power cables and copper nets is used, so that the ICNIRP guideline 6.25 μT at 20-kHz operating frequency can be met. The proposed cross-segmented power supply rail was implemented for experiments and verified for practical applications.

Virginie Majchrzak - One of the best experts on this subject based on the ideXlab platform.

  • Coupling Transformer Operation of a Dynamic Voltage Restorer Under Electrical Grid Conditions
    2017
    Co-Authors: Virginie Majchrzak
    Abstract:

    To improve electrical grids power quality, a dynamic voltage restorer with a magnetic voltage source converter protection scheme integrated in the Coupling Transformer is developed. Finite element analyses with an electrical- magnetic Coupling modeling are performed to study the behavior of the Coupling Transformer for all the operation modes, both the voltage regulation one in normal operation and the voltage source converter protection mode for several dierent and harsher electrical grid fault conditions in fault operation.

  • DC and AC Magnetic Flux Interaction in a Coupling Transformer with a Virtual Air Gap Principle of a Dynamic Voltage Restorer
    2017
    Co-Authors: Virginie Majchrzak
    Abstract:

    The Dynamic Voltage Restorer (DVR) is an efficient series voltage regulator which increases the electrical grids power quality. Nevertheless, this device composed of a Coupling Transformer and a Voltage Source Converter (VSC) needs a power electronics protection scheme against high faults electrical grids currents. Usually, this is done with an electro-mechanical bypass, but it has got two drawbacks: its time response and a fault detection scheme is required. For the studied DVR, a magnetic VSC protection scheme is added to the the existing Coupling Transformer magnetic core. This magnetic bypass is based on the Virtual Air Gap (VAG) principle which means the monitored local saturation of a magnetic core by a DC magnetic flux. Therefore, the operation of the Coupling Transformer is based on the interaction between a AC magnetic flux generated in the Transformer part of the Coupling Transformer and the DC magnetic flux generated in the magnetic bypass. In this paper, simulations with the finite element method and EMTP-RV and simplified analytical reasoning are used to explain how the magnetic behavior of this Coupling Transformer with a magnetic bypass ensures the protection of the VSC.

  • Influence of the electrical circuit configurations of a DVR Coupling Transformer with a magnetic bypass
    Compel-the International Journal for Computation and Mathematics in Electrical and Electronic Engineering, 2017
    Co-Authors: Virginie Majchrzak, Guillaume Parent, Jean-françois Brudny, Valentin Costan, Philippe Guuinic
    Abstract:

    Purpose For the proposed Coupling Transformer, a magnetic bypass based on the virtual air gap principle is realized by inserting auxiliary windings in a return leg added to a standard Transformer. With such a setup, it is able to act as a voltage regulator as well as protect the power electronics of the dynamic voltage restorer from electrical grid fault currents. This paper focuses on the electrical design part of the Coupling Transformer. It aims to explain how the behavior of the auxiliary windings electrical circuit of the magnetic bypass impacts the performances of the device. Design/methodology/approach The influence of the electrical auxiliary windings circuit configurations on the operation of the Coupling Transformer is studied by finite element analyses with nonlinear and isotropic magnetic materials. Findings A configuration for the realization of the electrical circuit of the auxiliary windings is determined according to the finite element simulation results to achieve the design of the Coupling Transformer whose magnetic core was previously designed. Originality/value By studying the operation of a special Coupling Transformer with nonlinear saturation phenomenon by finite element analyses, a to-do list of the electrical circuit parameters is described to design this device well.

  • Design of a Coupling Transformer With a Virtual Air Gap for Dynamic Voltage Restorers
    IEEE Transactions on Magnetics, 2016
    Co-Authors: Virginie Majchrzak, Guillaume Parent, Jean-françois Brudny, Valentin Costan, Philippe Guuinic
    Abstract:

    Dynamic voltage restorers are devices inserted in transmission and distribution electrical grids to improve efficiently the power quality. The weak point of these series devices is the fault current protection of the voltage source converter (VSC). We propose a new topology of the Coupling Transformer to protect the VSC, by replacing the usual electromechanical bypass by an embedded magnetic one. In this paper, the design method and the experimental validation of a low-voltage Coupling Transformer with a magnetic bypass are detailed.

  • Coupling Transformer with a virtual air gap for the protection of dynamic voltage restorers
    IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society, 2014
    Co-Authors: Virginie Majchrzak, Guillaume Parent, Jean-françois Brudny, Valentin Costan, Philippe Guuinic
    Abstract:

    The dynamic voltage restorers are efficient series compensation devices to improve power quality. Indeed, they are composed of a Coupling Transformer and power electronics to provide fast voltage sag correction and harmonics compensation. This paper focuses on a new topology of a Coupling Transformer for the dynamic voltage restorers which improves the protection of the voltage source converter against grid fault including short-circuits, by changing the magnetic state of the Transformer core. In this paper, the operating modes in steady state of the proposed Coupling Transformer equipped with a virtual air gap are studied by both Finite Element simulations and experimental measurements.

Related terms

Coupling Transformer - 15 days free trial to Access Experts & Abstracts