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Vicente León-Martínez, Elisa Peñalvo-López, Juan Ángel Sáiz-Jiménez and Amparo León-Vinet
Short-circuit resistances are transformer parameters that characterize the electrical load losses and correct operation of these machines. However, the traditional concept of short-circuit resistance, independent of the harmonic frequencies, has been sup...
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In this paper, an improved smart meter data-based three-stage algorithm to calculate the power/energy losses in three-phase networks with the voltage level below 0.4 kV (low voltage—LV) is presented. In the first stage, the input data regarding the...
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A. M. Afanasov
Pág. 34 - 37
The conditions of compensation of electric losses at the test of hauling electric engines by the Hopkinson?s scheme are considered.
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A. M. Afanasov
Pág. 59 - 62
The conditions of compensation of magnetic and mechanical losses during the test of hauling electric machines according to the Potier?s chart are considered.
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Sadia Nahar, Md. Kamrul Hassan, Mohammad Abdul Mannan
Pág. 7 ? 12
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Alvinn Ruíz Pérez,Julio Rafael Gómez Sarduy,Percy Rafael Viego Felipe
Pág. 2 - 10
En este trabajo se aborda la temática del cálculo de las pérdidas de transformación. El método propuesto toma en consideración la variabilidad y asimetría de la carga, así como la presencia de problemas de calidad de la energía como el desbalance y las v...
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A. M. Afanasov
Pág. 65 - 68
The analysis of power indices of process of compensation of magnetic and mechanical losses in the charts of mutual loading of hauling electric motors with the use of electric power source is resulted.
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Yurii Tomashevskyi,Oleksander Burykin,Volodymyr Kulyk,Juliya Malogulko
Pág. 6 - 12
Power grids are insufficiently equipped with means of monitoring of operating parameters. The infrastructure of commercial power consumption accounting systems is the most developed. However, power consumption information is stored in the aggregated form...
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Suyeon Kim, Junhyung Jeong, Girdhari Chaudhary and Yongchae Jeong
This paper presents a design for a dual-band tunable phase shifter (PS) with independently controllable phase shifting between each operating frequency band. The proposed PS consists of a 3-dB hybrid coupler, in which the coupled and through ports termin...
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Soheil Jafari, Ahmed Bouchareb and Theoklis Nikolaidis
This paper presents a methodological approach for mathematical modelling and physics-based analysis of accessory gearbox (AGB) thermal behavior in gas turbine aero engines. The AGB structure, as one of the main sources of heat in gas turbine aero engines...
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Clemens Bernhard Domnick, Freidrich-Karl Benra, Dieter Brillert, Christian Musch
Pág. 185 - 192
The flow in a steam turbine inlet valve is investigated and improved by numerical methods. From the fluid dynamic point of view two requirements exist: Low pressure losses are desired at the fully opened valve position and dynamic fluid forces acting on ...
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Brahim Menacer, Mostefa Bouchetara
Pág. 299 - 306
The oil consumption in an internal combustion engine is an important source of pollution and particulate emissions, main efforts are done by the manufacturers to reduce to the maximum the impact of the oil consumption on the emissions of the engine, and ...
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José Miguel Bruzón Hernández,Orestes Hernández Areu,Josnier Ramos Guardarrama
Pág. 21 - 30
En los transformadores el tema de la distribución o configuración de la zona de los entrehierros, ha motivado la discusión de especialistas,toda vez que la combinación de los parámetros que caracterizan a esta zona ejerce cierta influencia sobre los nive...
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Nagarajan Booma, Sathi Ramareddy
Pág. 173 - 183
This paper discusses about the fixed frequency pulse mask control based high frequency AC conversion circuit for industrial induction heating applications. Conventionally, for induction heating load, the output power control is achieved using the pulse w...
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Tine L. Vandoorn, Jeroen D. M. De Kooning, Jan Van de Vyver and Lieven Vandevelde
For islanded microgrids, droop-based control concepts have been developed both in single and three-phase variants. The three-phase controllers often assume a balanced network; hence, unbalance sharing and/or mitigation remains a challenging issue. Theref...
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Nagarajan Booma, Sathi Ramareddy (Author)
Pág. 173 - 183
This paper discusses about the fixed frequency pulse mask control based high frequency AC conversion circuit for industrial induction heating applications. Conventionally, for induction heating load, the output power control is achieved using the pulse w...
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Marcin Wardach, Piotr Paplicki and Ryszard Palka
In this paper, an U-shape flux barrier rotor concept for a hybrid excited synchronous machine with flux magnetic bridges fixed on the rotor is presented. Using 3D finite element analysis, the influence of axial flux bridges on the field-weakening and -st...
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O. L. Marenych
Pág. 172 - 174
The research to propose methods of determination of the load factor, at which it is advisable to switch off one of two parallel working power feeding transformers in order to reduce the losses of active energy in transformers, has been carried out.
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Zeynep Firat Alemdar and Fatih Alemdar
Corrosion damage is a serious problem in steel structures. The cross-sectional loss in the structural members due to corrosion reduces the load-carrying capacity of the members and the stability of their structures. In this study, the main reasons for th...
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Lena-Marie Ränger, Yannick Waibel and Thomas Grützner
For an in-depth investigation of the separation process in small-scale distillation columns, knowledge about the exact vapor load inside the column is highly important. However, since columns with small diameters have a comparatively high surface-to-volu...
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