The Experts below are selected from a list of 273 Experts worldwide ranked by ideXlab platform

I Mandic - One of the best experts on this subject based on the ideXlab platform.

  • turbogenerator end winding leakage Inductance Calculation using a 3 d analytical approach based on the solution of neumann integrals
    IEEE Transactions on Energy Conversion, 2005
    Co-Authors: Damir Zarko, I Mandic
    Abstract:

    An analytical technique that can be effectively used for the Calculation of the end-winding leakage Inductance of a turbogenerator has been presented. It is based on a three-dimensional geometric model of the end-winding region in which each coil is modeled as a set of serially connected straight filaments. The Calculation of the mutual Inductance of the end coils is based on the multiple solutions of the Neumann integral. The method also accounts for the influence of stator core iron on the end-winding leakage Inductance by using the method of images. The results of the Calculations have been compared with the measured values of the leakage Inductance for 247-MVA turbogenerator manufactured by KONCAR Generators and Motors Inc., Zagreb, Croatia. The principle of the end-winding leakage Inductance Calculation described herein can be effectively used for other types of machines and windings as well.

  • Turbogenerator end winding leakage Inductance Calculation using a 3-D analytical approach based on the solution of Neumann integrals
    IEEE International Electric Machines and Drives Conference 2003. IEMDC'03., 2003
    Co-Authors: Damir Zarko, I Mandic
    Abstract:

    An analytical technique that can be effectively used for the Calculation of the end winding leakage Inductance of a turbogenerator has been presented. It is based on a 3-D geometric model of the end winding region in which each coil is modeled as a set of serially connected straight filaments. The Calculation of the mutual Inductance of the end coils is based on the multiple solutions of the Neumann integral. The method also accounts for the influence of stator core iron on the end winding leakage Inductance by using the method of images. The results of the Calculations have been compared with the measured values of the leakage Inductance for 247 MVA turbogenerator manufactured by KONCAR Generators and Motors Inc., Zagreb, Croatia. The principle of the end winding leakage Inductance Calculation described can be effectively used for other types of machines and windings as well.

Damir Zarko - One of the best experts on this subject based on the ideXlab platform.

  • turbogenerator end winding leakage Inductance Calculation using a 3 d analytical approach based on the solution of neumann integrals
    IEEE Transactions on Energy Conversion, 2005
    Co-Authors: Damir Zarko, I Mandic
    Abstract:

    An analytical technique that can be effectively used for the Calculation of the end-winding leakage Inductance of a turbogenerator has been presented. It is based on a three-dimensional geometric model of the end-winding region in which each coil is modeled as a set of serially connected straight filaments. The Calculation of the mutual Inductance of the end coils is based on the multiple solutions of the Neumann integral. The method also accounts for the influence of stator core iron on the end-winding leakage Inductance by using the method of images. The results of the Calculations have been compared with the measured values of the leakage Inductance for 247-MVA turbogenerator manufactured by KONCAR Generators and Motors Inc., Zagreb, Croatia. The principle of the end-winding leakage Inductance Calculation described herein can be effectively used for other types of machines and windings as well.

  • Turbogenerator end winding leakage Inductance Calculation using a 3-D analytical approach based on the solution of Neumann integrals
    IEEE International Electric Machines and Drives Conference 2003. IEMDC'03., 2003
    Co-Authors: Damir Zarko, I Mandic
    Abstract:

    An analytical technique that can be effectively used for the Calculation of the end winding leakage Inductance of a turbogenerator has been presented. It is based on a 3-D geometric model of the end winding region in which each coil is modeled as a set of serially connected straight filaments. The Calculation of the mutual Inductance of the end coils is based on the multiple solutions of the Neumann integral. The method also accounts for the influence of stator core iron on the end winding leakage Inductance by using the method of images. The results of the Calculations have been compared with the measured values of the leakage Inductance for 247 MVA turbogenerator manufactured by KONCAR Generators and Motors Inc., Zagreb, Croatia. The principle of the end winding leakage Inductance Calculation described can be effectively used for other types of machines and windings as well.

Andre M. S. Mendes - One of the best experts on this subject based on the ideXlab platform.

  • improved Inductance Calculation in variable power inductors by adjustment of the reluctance model through magnetic path analysis
    IEEE Transactions on Industry Applications, 2021
    Co-Authors: Sarah Saeed, Jorge Garcia, Marina S. Perdigao, Valter S. Costa, Bruno Baptista, Andre M. S. Mendes
    Abstract:

    This article presents a study to improve the Inductance Calculation of magnetic components in power converters, of particular interest, in the case of applications using variable inductors. In order to increase the accuracy of the estimation of the reluctance paths, several factors have been taken into consideration, such as the permeability definition under saturation, the temperature effect on the magnetic material behavior, and the distribution of saturated regions in the magnetic core. The methodology of the present study is to compare the analytical models derived from circuital equivalents against finite-element analysis numerical techniques, in order to validate the proposed model of a variable inductor, including the effects of the mentioned factors. The proposed model is then compared with experimental measurements to prove its validity. Finally, a design example for the variable inductor is presented.

  • Improved Inductance Calculation in variable power inductors by adjustment of the reluctance model through magnetic path analysis
    2019 IEEE Energy Conversion Congress and Exposition (ECCE), 2019
    Co-Authors: Sarah Saeed, Jorge Garcia, Marina S. Perdigao, Valter S. Costa, Bruno Baptista, Andre M. S. Mendes
    Abstract:

    This paper presents a study to improve the Inductance Calculation of magnetic elements for power converters, particularly important in the case of applications using variable inductors. Several factors have been taken into consideration, such as: the permeability definition under saturation, the temperature effect on the magnetic material behavior, and the distribution of saturated regions in the magnetic core which results in an accurate estimation of reluctance paths. Further depth is given to the study by using Finite Element Analysis to simulate a variable inductor and analyze the effect of the latter mentioned factors. The studied analysis is then compared with experimental results to prove the validity of the proposed improvements.

Torbjorn Thiringer - One of the best experts on this subject based on the ideXlab platform.

  • an accurate analytical method for leakage Inductance Calculation of shell type transformers with rectangular windings
    IEEE Access, 2021
    Co-Authors: Morteza Eslamian, Mohammad Kharezy, Torbjorn Thiringer
    Abstract:

    This paper presents an accurate analytical method for calculating the leakage Inductance of shell-type E-core transformers with rectangular windings. For this purpose, first, an expression for calculating the leakage Inductance per unit length inside the core window considering the core walls as the flux-normal boundary condition is derived. Then, a new accurate method for determining the Mean Length of Turns (MLT) based on the total stored energy is presented. The MLT is needed for the leakage Inductance Calculation using 2-D methods. By dividing the MLT into three partial lengths and calculating the corresponding leakage Inductances using three different core window arrangements, the effect of core structure on the total leakage Inductance is considered. The method is verified by 3-D FEM simulations as well as the leakage Inductance measurements on two different fabricated transformer prototypes. The superiority of the method is also confirmed by comparisons with the previous analytical approaches. The proposed method enables the leakage Inductance Calculation with an error less than 1%, compared to the 3-D FEM results. Using the presented method, the leakage Inductance Calculations can be performed rapidly and accurately in the design stage without the need for time-consuming 3-D FEM simulations.

Sarah Saeed - One of the best experts on this subject based on the ideXlab platform.

  • improved Inductance Calculation in variable power inductors by adjustment of the reluctance model through magnetic path analysis
    IEEE Transactions on Industry Applications, 2021
    Co-Authors: Sarah Saeed, Jorge Garcia, Marina S. Perdigao, Valter S. Costa, Bruno Baptista, Andre M. S. Mendes
    Abstract:

    This article presents a study to improve the Inductance Calculation of magnetic components in power converters, of particular interest, in the case of applications using variable inductors. In order to increase the accuracy of the estimation of the reluctance paths, several factors have been taken into consideration, such as the permeability definition under saturation, the temperature effect on the magnetic material behavior, and the distribution of saturated regions in the magnetic core. The methodology of the present study is to compare the analytical models derived from circuital equivalents against finite-element analysis numerical techniques, in order to validate the proposed model of a variable inductor, including the effects of the mentioned factors. The proposed model is then compared with experimental measurements to prove its validity. Finally, a design example for the variable inductor is presented.

  • Improved Inductance Calculation in variable power inductors by adjustment of the reluctance model through magnetic path analysis
    2019 IEEE Energy Conversion Congress and Exposition (ECCE), 2019
    Co-Authors: Sarah Saeed, Jorge Garcia, Marina S. Perdigao, Valter S. Costa, Bruno Baptista, Andre M. S. Mendes
    Abstract:

    This paper presents a study to improve the Inductance Calculation of magnetic elements for power converters, particularly important in the case of applications using variable inductors. Several factors have been taken into consideration, such as: the permeability definition under saturation, the temperature effect on the magnetic material behavior, and the distribution of saturated regions in the magnetic core which results in an accurate estimation of reluctance paths. Further depth is given to the study by using Finite Element Analysis to simulate a variable inductor and analyze the effect of the latter mentioned factors. The studied analysis is then compared with experimental results to prove the validity of the proposed improvements.