The Experts below are selected from a list of 46443 Experts worldwide ranked by ideXlab platform
Radovan Bureš - One of the best experts on this subject based on the ideXlab platform.
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Steinmetz law for ac magnetized iron-phenolformaldehyde resin soft magnetic composites
Journal of Magnetism and Magnetic Materials, 2017Co-Authors: Peter Kollár, Vladimír Vojtek, Ján Füzer, Mária Fáberová, D. Olekšáková, Radovan BurešAbstract:Abstract The validity of the Steinmetz law, describing the total energy losses as a function of maximum induction from 0.1 to 1.2 T has been verified in the frequency range from 100 Hz to 1.2 kHz for iron-based soft magnetic composites (SMCs), with the aim to determine the coefficients in Steinmetz law. The Bertotti's statistical model was used to modify the Steinmetz law, for the hysteresis energy loss W d c of SMCs magnetized in dc magnetic field, to the model for total energy losses W t when an ac magnetic field is applied. In this case the total energy losses W t consist of hysteresis losses to which the dynamic energy losses W d , consisting of interparticle eddy current losses W c int e r , intraparticle eddy current losses W c int r a and excess losses W e , were added. The validity of this model was experimentally proven for the investigated Fe-based SMCs at maximum inductions B m ranging from 0.1 to 1.2 T.
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Steinmetz law in iron phenolformaldehyde resin soft magnetic composites
Journal of Magnetism and Magnetic Materials, 2014Co-Authors: Peter Kollár, Vladimír Vojtek, Zuzana Birčáková, Ján Füzer, Mária Fáberová, Radovan BurešAbstract:The validity of Steinmetz law describing the dc energy losses as a function of maximum induction has been investigated for iron based soft magnetic composites (SMCs) up to 1.4 T with the effort to find a physical meaning of the coefficients in Steinmetz law. In the Rayleigh region the coefficients were expressed mathematically using the Rayleigh law. Further the “range of validity of Steinmetz law” was found to be from 0.3 T to 1.2 T. The typical “straight” shape of hysteresis loops of SMCs at lower maximum induction was approximated by linear functions in order to express the dc losses in form of Steinmetz law.
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Steinmetz law in iron–phenolformaldehyde resin soft magnetic composites
Journal of Magnetism and Magnetic Materials, 2014Co-Authors: Peter Kollár, Vladimír Vojtek, Zuzana Birčáková, Ján Füzer, Mária Fáberová, Radovan BurešAbstract:The validity of Steinmetz law describing the dc energy losses as a function of maximum induction has been investigated for iron based soft magnetic composites (SMCs) up to 1.4 T with the effort to find a physical meaning of the coefficients in Steinmetz law. In the Rayleigh region the coefficients were expressed mathematically using the Rayleigh law. Further the “range of validity of Steinmetz law” was found to be from 0.3 T to 1.2 T. The typical “straight” shape of hysteresis loops of SMCs at lower maximum induction was approximated by linear functions in order to express the dc losses in form of Steinmetz law.
Peter Kollár - One of the best experts on this subject based on the ideXlab platform.
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Steinmetz law for ac magnetized iron-phenolformaldehyde resin soft magnetic composites
Journal of Magnetism and Magnetic Materials, 2017Co-Authors: Peter Kollár, Vladimír Vojtek, Ján Füzer, Mária Fáberová, D. Olekšáková, Radovan BurešAbstract:Abstract The validity of the Steinmetz law, describing the total energy losses as a function of maximum induction from 0.1 to 1.2 T has been verified in the frequency range from 100 Hz to 1.2 kHz for iron-based soft magnetic composites (SMCs), with the aim to determine the coefficients in Steinmetz law. The Bertotti's statistical model was used to modify the Steinmetz law, for the hysteresis energy loss W d c of SMCs magnetized in dc magnetic field, to the model for total energy losses W t when an ac magnetic field is applied. In this case the total energy losses W t consist of hysteresis losses to which the dynamic energy losses W d , consisting of interparticle eddy current losses W c int e r , intraparticle eddy current losses W c int r a and excess losses W e , were added. The validity of this model was experimentally proven for the investigated Fe-based SMCs at maximum inductions B m ranging from 0.1 to 1.2 T.
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Steinmetz law in iron phenolformaldehyde resin soft magnetic composites
Journal of Magnetism and Magnetic Materials, 2014Co-Authors: Peter Kollár, Vladimír Vojtek, Zuzana Birčáková, Ján Füzer, Mária Fáberová, Radovan BurešAbstract:The validity of Steinmetz law describing the dc energy losses as a function of maximum induction has been investigated for iron based soft magnetic composites (SMCs) up to 1.4 T with the effort to find a physical meaning of the coefficients in Steinmetz law. In the Rayleigh region the coefficients were expressed mathematically using the Rayleigh law. Further the “range of validity of Steinmetz law” was found to be from 0.3 T to 1.2 T. The typical “straight” shape of hysteresis loops of SMCs at lower maximum induction was approximated by linear functions in order to express the dc losses in form of Steinmetz law.
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Steinmetz law in iron–phenolformaldehyde resin soft magnetic composites
Journal of Magnetism and Magnetic Materials, 2014Co-Authors: Peter Kollár, Vladimír Vojtek, Zuzana Birčáková, Ján Füzer, Mária Fáberová, Radovan BurešAbstract:The validity of Steinmetz law describing the dc energy losses as a function of maximum induction has been investigated for iron based soft magnetic composites (SMCs) up to 1.4 T with the effort to find a physical meaning of the coefficients in Steinmetz law. In the Rayleigh region the coefficients were expressed mathematically using the Rayleigh law. Further the “range of validity of Steinmetz law” was found to be from 0.3 T to 1.2 T. The typical “straight” shape of hysteresis loops of SMCs at lower maximum induction was approximated by linear functions in order to express the dc losses in form of Steinmetz law.
Luis Sainz - One of the best experts on this subject based on the ideXlab platform.
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Statistical study of resonance in AC traction systems equipped with Steinmetz circuit
Electric Power Systems Research, 2013Co-Authors: Lluis Monjo, Luis Sainz, Joan RullAbstract:Abstract AC traction systems can be 25 kV/50 Hz single-phase, non-linear, time-varying loads of random nature causing unbalance and distortion of the supply voltages. To reduce voltage unbalance, thyristor controlled reactances are usually delta-connected with traction systems. This setup, called Steinmetz circuit, can adapt reactance values to traction load fluctuations in order to balance consumed currents. To avoid voltage distortion problems due to harmonic currents injected by traction loads, resonances between the Steinmetz and supply system reactances “observed” from the traction system must be analyzed. This paper characterizes stochastic behavior of these resonances, which is caused by random variations in traction power consumption. The study used simulations of an AC traction system with intercity services and measurements of a French railway traction substation.
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Study of the Steinmetz Circuit Influence on AC Traction System Resonance
IEEE Transactions on Power Delivery, 2012Co-Authors: Luis Sainz, Lluis Monjo, S. Riera, Joaquin PedraAbstract:Traction systems are single-phase, nonlinear loads, which can unbalance and pollute supply voltages. To reduce voltage unbalance, reactances are usually connected in delta configuration with traction systems. This setup is called the Steinmetz circuit. Parallel and series resonances can occur between the Steinmetz capacitor and system inductors, increasing voltage distortion. Thus, it is important to analyze the parallel resonance “observed” from the traction system to avoid harmonic problems due to its injected harmonic currents. This paper studies this resonance analytically and presents simple expressions to locate it. Experimental measurements are also provided to validate the obtained analytical results. These expressions are also used to analyze resonance in several power systems in the literature.
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Influence of Steinmetz circuit capacitor degradation on series resonance of networks
European Transactions on Electrical Power, 2010Co-Authors: Luis Sainz, M. Caro, Eduardo CaroAbstract:The Steinmetz circuit is used in AC traction systems to balance consumed currents. In these systems, locating resonances between Steinmetz circuit capacitors and system inductors avoids harmonic problems. In particular, the paper locates analytically the series resonance “observed” from the supply system considering the influence of capacitor degradation with respect to its design value. The study of this resonance is important to avoid problems associated with background voltage distortion. The analytical results are validated with experimental measurements. Copyright © 2010 John Wiley & Sons, Ltd.
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Analytical Study of the Series Resonance in Power Systems With the Steinmetz Circuit
IEEE Transactions on Power Delivery, 2009Co-Authors: Luis Sainz, M. Caro, Eduardo CaroAbstract:In traction systems, it is usual to connect reactances in delta configuration with single-phase loads to reduce voltage unbalances. This set is called a Steinmetz circuit. Parallel and series resonances can occur between the Steinmetz capacitor and system inductors, increasing harmonic voltage distortion. It is important to analyze the series resonance ldquoobservedrdquo from the supply system to avoid harmonic problems due to background voltage distortion. The paper studies this resonance analytically and presents simple expressions to locate it. Experimental measurements are also provided to validate the obtained analytical results.
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Background voltage distortion influence on power electric systems in the presence of the Steinmetz circuit
Electric Power Systems Research, 2009Co-Authors: Luis Sainz, Joaquin Pedra, M. CaroAbstract:Abstract In traction systems, it is usual to connect reactances in delta configuration with single-phase loads to reduce voltage unbalances and avoid electric system operation problems. This set is known as Steinmetz circuit. Parallel and series resonances can occur due to the capacitive reactance of the Steinmetz circuit and affect power quality. In this paper, the series resonance “observed” from the supply system is numerically located. The study of this resonance is important to avoid problems due to background voltage distortion. Experimental measurements are also presented to validate the obtained numerical results.
Mária Fáberová - One of the best experts on this subject based on the ideXlab platform.
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Steinmetz law for ac magnetized iron-phenolformaldehyde resin soft magnetic composites
Journal of Magnetism and Magnetic Materials, 2017Co-Authors: Peter Kollár, Vladimír Vojtek, Ján Füzer, Mária Fáberová, D. Olekšáková, Radovan BurešAbstract:Abstract The validity of the Steinmetz law, describing the total energy losses as a function of maximum induction from 0.1 to 1.2 T has been verified in the frequency range from 100 Hz to 1.2 kHz for iron-based soft magnetic composites (SMCs), with the aim to determine the coefficients in Steinmetz law. The Bertotti's statistical model was used to modify the Steinmetz law, for the hysteresis energy loss W d c of SMCs magnetized in dc magnetic field, to the model for total energy losses W t when an ac magnetic field is applied. In this case the total energy losses W t consist of hysteresis losses to which the dynamic energy losses W d , consisting of interparticle eddy current losses W c int e r , intraparticle eddy current losses W c int r a and excess losses W e , were added. The validity of this model was experimentally proven for the investigated Fe-based SMCs at maximum inductions B m ranging from 0.1 to 1.2 T.
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Steinmetz law in iron phenolformaldehyde resin soft magnetic composites
Journal of Magnetism and Magnetic Materials, 2014Co-Authors: Peter Kollár, Vladimír Vojtek, Zuzana Birčáková, Ján Füzer, Mária Fáberová, Radovan BurešAbstract:The validity of Steinmetz law describing the dc energy losses as a function of maximum induction has been investigated for iron based soft magnetic composites (SMCs) up to 1.4 T with the effort to find a physical meaning of the coefficients in Steinmetz law. In the Rayleigh region the coefficients were expressed mathematically using the Rayleigh law. Further the “range of validity of Steinmetz law” was found to be from 0.3 T to 1.2 T. The typical “straight” shape of hysteresis loops of SMCs at lower maximum induction was approximated by linear functions in order to express the dc losses in form of Steinmetz law.
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Steinmetz law in iron–phenolformaldehyde resin soft magnetic composites
Journal of Magnetism and Magnetic Materials, 2014Co-Authors: Peter Kollár, Vladimír Vojtek, Zuzana Birčáková, Ján Füzer, Mária Fáberová, Radovan BurešAbstract:The validity of Steinmetz law describing the dc energy losses as a function of maximum induction has been investigated for iron based soft magnetic composites (SMCs) up to 1.4 T with the effort to find a physical meaning of the coefficients in Steinmetz law. In the Rayleigh region the coefficients were expressed mathematically using the Rayleigh law. Further the “range of validity of Steinmetz law” was found to be from 0.3 T to 1.2 T. The typical “straight” shape of hysteresis loops of SMCs at lower maximum induction was approximated by linear functions in order to express the dc losses in form of Steinmetz law.
Vladimír Vojtek - One of the best experts on this subject based on the ideXlab platform.
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Steinmetz law for ac magnetized iron-phenolformaldehyde resin soft magnetic composites
Journal of Magnetism and Magnetic Materials, 2017Co-Authors: Peter Kollár, Vladimír Vojtek, Ján Füzer, Mária Fáberová, D. Olekšáková, Radovan BurešAbstract:Abstract The validity of the Steinmetz law, describing the total energy losses as a function of maximum induction from 0.1 to 1.2 T has been verified in the frequency range from 100 Hz to 1.2 kHz for iron-based soft magnetic composites (SMCs), with the aim to determine the coefficients in Steinmetz law. The Bertotti's statistical model was used to modify the Steinmetz law, for the hysteresis energy loss W d c of SMCs magnetized in dc magnetic field, to the model for total energy losses W t when an ac magnetic field is applied. In this case the total energy losses W t consist of hysteresis losses to which the dynamic energy losses W d , consisting of interparticle eddy current losses W c int e r , intraparticle eddy current losses W c int r a and excess losses W e , were added. The validity of this model was experimentally proven for the investigated Fe-based SMCs at maximum inductions B m ranging from 0.1 to 1.2 T.
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Steinmetz law in iron phenolformaldehyde resin soft magnetic composites
Journal of Magnetism and Magnetic Materials, 2014Co-Authors: Peter Kollár, Vladimír Vojtek, Zuzana Birčáková, Ján Füzer, Mária Fáberová, Radovan BurešAbstract:The validity of Steinmetz law describing the dc energy losses as a function of maximum induction has been investigated for iron based soft magnetic composites (SMCs) up to 1.4 T with the effort to find a physical meaning of the coefficients in Steinmetz law. In the Rayleigh region the coefficients were expressed mathematically using the Rayleigh law. Further the “range of validity of Steinmetz law” was found to be from 0.3 T to 1.2 T. The typical “straight” shape of hysteresis loops of SMCs at lower maximum induction was approximated by linear functions in order to express the dc losses in form of Steinmetz law.
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Steinmetz law in iron–phenolformaldehyde resin soft magnetic composites
Journal of Magnetism and Magnetic Materials, 2014Co-Authors: Peter Kollár, Vladimír Vojtek, Zuzana Birčáková, Ján Füzer, Mária Fáberová, Radovan BurešAbstract:The validity of Steinmetz law describing the dc energy losses as a function of maximum induction has been investigated for iron based soft magnetic composites (SMCs) up to 1.4 T with the effort to find a physical meaning of the coefficients in Steinmetz law. In the Rayleigh region the coefficients were expressed mathematically using the Rayleigh law. Further the “range of validity of Steinmetz law” was found to be from 0.3 T to 1.2 T. The typical “straight” shape of hysteresis loops of SMCs at lower maximum induction was approximated by linear functions in order to express the dc losses in form of Steinmetz law.
