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    Wyświetlanie 1-5 z 5
    Tytuł:
    Magnetic field of complex helical conductors
    Autorzy:
    Budnik, K.
    Machczyński, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/141527.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Biot-Savart law
    magnetic flux density
    helical line
    Opis:
    Transmission of the electric power is accompanied with generation of low –frequency electromagnetic fields. Electromagnetic compatibility studies require that the fields from sources of electric power be well known. Unfortunately, many of these sources are not defined to the desired degree of accuracy. This applies e.g. to the case of the twisted-wire pair used in telephone communication; already practiced is twisting of insulated high-voltage three phase power cables and single-phase distribution cables as well. The paper presents a theoretical study of the calculation of magnetic fields in vicinity of conductors having helical structure. For the helical conductor with finite length the method is based on the Biot-Savart law. Since the lay-out of the cables is much more similar to a broken line than to strait line, in the paper the magnetic flux densities produced by helical conductor of complex geometry are also derived. The analytical formulas for calculating the 3D magnetic field can be used by a software tool to model the magnetic fields generated by e.g. twisted wires, helical coils, etc.
    Źródło:
    Archives of Electrical Engineering; 2013, 62, 4; 533-540
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electromotive force induced in a loop conductor under a power line conductor
    Autorzy:
    Budnik, K.
    Machczyński, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/378317.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    electromotive force
    loop conductor
    overhead power line
    earth return
    Opis:
    The study presents methods of the calculation of electromotive force (emf) induced in a mitigation loop located under an overhead power line conductor. The loop can be treated as a rectangular loop (two-conductor closed mitigation loop) located near the power line horizontal to the earth surface. Exact and simplified methods of the determination of the emf are presented. The exact method bases on the earth return circuit theory, whereas the simplified method allows one to calculate the induced emf under the assumption neglecting earth currents.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2014, 77; 85-92
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reduction of magnetic field from a power line using a passive loop conductor
    Autorzy:
    Budnik, K.
    Machczyński, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/97443.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    magnetic field
    overhead power line
    earth return
    passive loop
    Opis:
    The study presents in a tutorial manner methods of the calculation of magnetic fields in vicinity of overhead electric power lines without and with mitigation loops. Exact and simplified methods of the determination of the magnetic field of a straight overhead conductor based on the Fourier transform technique are presented. The decomposition of the magnetic fields in two components: magnetic field obtained in free space from the Biot-Savart law and the magnetic field produced by earth current is discussed. It is shown that in practical cases the effects from earth currents can be neglected as compared with effects from line currents. Moreover the mitigation effects due to the passive loop are also investigated, whereas the mitigation loop can be treated as a rectangular loop (two-conductor closed mitigation loop) located near the power line horizontal or non-parallel to the earth surface.
    Źródło:
    Computer Applications in Electrical Engineering; 2013, 11; 46-63
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Voltage induced by currents in power-line sagged conductors in nearby circuits of arbitrary configuration
    Autorzy:
    Budnik, K.
    Machczyński, W.
    Szymenderski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/140488.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    power line
    catenary
    vector potential
    overhead circuit
    induced voltage
    mutual inductance
    Opis:
    The study presents a calculation method of the voltage induced by power-line sagged conductor in an inductively coupled overhead circuit of arbitrary configuration isolated from ground. The method bases on the solution utilizing the magnetic vector potential for modeling 3D magnetic fields produced by sagging conductors of catenary electric power lines. It is assumed that the equation of the catenary exactly describes the line sag and the influence of currents induced in the earth on the distribution of power line magnetic field is neglected. The method derived is illustrated by exemplary calculations and the results obtained are partially compared with results computed by optional approach.
    Źródło:
    Archives of Electrical Engineering; 2015, 64, 2; 227-236
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Power line induced electric field and electromotive force in a nearby overhead circuit
    Autorzy:
    Budnik, K.
    Machczyński, W.
    Szymenderski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/97415.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    overhead power line
    earth return
    induced electric field
    loop conductor
    electromotive force
    Opis:
    The study presents methods of the calculation of electric field induced in vicinity of an overhead current carrying conductor. Exact method of the determination of the induced electric field bases on the Fourier transform technique, whereas a simplified method uses the concept of complex ground return plane. Exact and simplified methods of the calculation of electromotive force (emf) induced in a loop located under an overhead power line conductor are also presented. The loop is treated as a rectangular loop (two-conductor closed loop) located near the power line horizontal to the earth surface. The exact method bases on the earth return circuit theory, whereas the simplified method allows one to calculate the induced emf under the assumption neglecting earth currents. The methods presented are illustrated by exemplary calculations.
    Źródło:
    Computer Applications in Electrical Engineering; 2014, 12; 45-56
    1508-4248
    Pojawia się w:
    Computer Applications in Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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