The Experts below are selected from a list of 4779 Experts worldwide ranked by ideXlab platform
Shahriyar Kaboli - One of the best experts on this subject based on the ideXlab platform.
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Improvement of the Energy Method for Stray Capacitance Modelling of Transformer Winding in High Voltage Power Supplies
2018 IEEE 19th Workshop on Control and Modeling for Power Electronics (COMPEL), 2018Co-Authors: Shahriyar Kaboli, Reza FarajidavarAbstract:Stray Capacitance of a high voltage transformer winding is an important parasitic element. It influences the behavior of the high voltage switching power converters. Energy method is a widely used well-known method for calculating the winding Capacitance. However, the adjacent pairs of turns is considered only in many references. In this paper, an investigation is presented about the accuracy of the energy method. Some guidelines for achieving a better accuracy as well as simplicity of the model for Capacitance calculating are presented. The proposed method is tested and validated with the computer simulation and the experimental measurement.
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On the Effect of Disorder on Stray Capacitance of Transformer Winding in High-Voltage Power Supplies
IEEE Transactions on Industrial Electronics, 2017Co-Authors: Morteza Aghaei, Shahriyar KaboliAbstract:Stray Capacitance of transformer winding is an important parasitic element influencing the behavior of the switching power converters, especially for high-voltage transformers. There are various methods for calculating the Stray Capacitance in transformers and inductors with ordered windings. However, an ordered winding is less likely with an increased number of turns and layers. In this paper, it is shown that a slight disorderliness in winding leads to a considerable difference between the value of winding Stray Capacitance of the former ordered winding and its slightly disordered scheme. Therefore, regular methods for calculating the Stray Capacitance have significant errors in a disordered winding. A generic method is proposed to calculate the Stray Capacitance of a winding with disordered turns. The proposed method is to apply the probabilistic tools to evaluate the possible position of winding turns and calculation of Stray Capacitance for all possible winding diagrams. As the number of possible winding diagrams is very large, especially in high turn windings, Kolmogorov–Smirnov theorem is used to estimate the winding Stray Capacitance based on the reduced number of possible winding diagrams. The energy method is used to calculate the equivalent Stray Capacitance of winding. Using this calculation method, the effect of disorder and some other parameters on the value of Stray Capacitance is investigated. The proposed method is tested and validated with the computer simulation and the experimental measurement.
Wonho Jhe - One of the best experts on this subject based on the ideXlab platform.
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Compensation of Stray Capacitance of the quartz tuning fork for a quantitative force spectroscopy
Current Applied Physics, 2013Co-Authors: Kunyoung Lee, Bongsu Kim, Jongwoo Kim, Soyoung Kwon, Qhwan Kim, Manhee Lee, Wonho JheAbstract:Abstract We have introduced a simple but robust approach to realize Stray-Capacitance compensation of a quartz tuning fork force gradient sensor by using a tied-prong of the same tuning fork instead of using a variable precision capacitor. The results of quantitative force measurements with the proposed device show excellent agreement with the numerical method of cancellation via the theoretical compensation method with the resonance response curves. Futhermore, the mechanical properties of the condensed nano-water bridges are investigated with the proposed compensator, which provides the potential promise of the intrinsic quartz tuning fork for a quantitative precision force spectroscopy.
Manuel Moreno-eguilaz - One of the best experts on this subject based on the ideXlab platform.
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Analysis and Mitigation of Stray Capacitance Effects in Resistive High-Voltage Dividers
Energies, 2019Co-Authors: Jordi-roger Riba, Francesca Capelli, Manuel Moreno-eguilazAbstract:This work analyzes the effects of the parasitic or Stray distributed Capacitance to ground in high-voltage environments and assesses the effectiveness of different corrective actions to minimize such effects. To this end, the Stray Capacitance of a 130 kV RMS high-voltage resistive divider is studied because it can severely influence the behavior of such devices when operating under alternating current or transient conditions. The Stray Capacitance is calculated by means of three-dimensional finite element analysis (FEA) simulations. Different laboratory experiments under direct current (DC) and alternating current (AC) supply are conducted to corroborate the theoretical findings, and different possibilities to mitigate Stray Capacitance effects are analyzed and discussed. The effects of the Capacitance are important in applications, such as large electrical machines including transformers, motors, and generators or in high-voltage applications involving voltage dividers, conductors or insulator strings, among others. The paper also proves the usefulness of FEA simulations in predicting the Stray Capacitance, since they can deal with a wide range of configurations and allow determining the effectiveness of different corrective configurations.
Kunyoung Lee - One of the best experts on this subject based on the ideXlab platform.
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Compensation of Stray Capacitance of the quartz tuning fork for a quantitative force spectroscopy
Current Applied Physics, 2013Co-Authors: Kunyoung Lee, Bongsu Kim, Jongwoo Kim, Soyoung Kwon, Qhwan Kim, Manhee Lee, Wonho JheAbstract:Abstract We have introduced a simple but robust approach to realize Stray-Capacitance compensation of a quartz tuning fork force gradient sensor by using a tied-prong of the same tuning fork instead of using a variable precision capacitor. The results of quantitative force measurements with the proposed device show excellent agreement with the numerical method of cancellation via the theoretical compensation method with the resonance response curves. Futhermore, the mechanical properties of the condensed nano-water bridges are investigated with the proposed compensator, which provides the potential promise of the intrinsic quartz tuning fork for a quantitative precision force spectroscopy.
Morteza Aghaei - One of the best experts on this subject based on the ideXlab platform.
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On the Effect of Disorder on Stray Capacitance of Transformer Winding in High-Voltage Power Supplies
IEEE Transactions on Industrial Electronics, 2017Co-Authors: Morteza Aghaei, Shahriyar KaboliAbstract:Stray Capacitance of transformer winding is an important parasitic element influencing the behavior of the switching power converters, especially for high-voltage transformers. There are various methods for calculating the Stray Capacitance in transformers and inductors with ordered windings. However, an ordered winding is less likely with an increased number of turns and layers. In this paper, it is shown that a slight disorderliness in winding leads to a considerable difference between the value of winding Stray Capacitance of the former ordered winding and its slightly disordered scheme. Therefore, regular methods for calculating the Stray Capacitance have significant errors in a disordered winding. A generic method is proposed to calculate the Stray Capacitance of a winding with disordered turns. The proposed method is to apply the probabilistic tools to evaluate the possible position of winding turns and calculation of Stray Capacitance for all possible winding diagrams. As the number of possible winding diagrams is very large, especially in high turn windings, Kolmogorov–Smirnov theorem is used to estimate the winding Stray Capacitance based on the reduced number of possible winding diagrams. The energy method is used to calculate the equivalent Stray Capacitance of winding. Using this calculation method, the effect of disorder and some other parameters on the value of Stray Capacitance is investigated. The proposed method is tested and validated with the computer simulation and the experimental measurement.