Wpływ falistości pierścienia ślizgowego na rozpływ prądu w zestyku ślizgowym maszyny synchronicznej

• Autorzy: Wilk A. , Dobrowolski P. , Kostro G.

Warianty tytułu

EN

Influence of slip-ring waviness on current distribution in the sliding contact of a synchronous machine

• Konferencja: Problemy eksploatacji maszyn i napędów elektrycznych (2005; Ustroń, Polska)
• Języki publikacji: PL

Abstrakty

EN

An investigation of the influence of slip-ring waviness on current distribution in the sliding contact with several brushes connected in parallel has been the objective of the paper. The authors have presented their own measurement results of slip-ring waviness and have made decomposition of this waviness into harmonic components. The authors' model of the sliding contact with two mechanical degrees of freedom (published earlier) has been used for calculations. This model takes into consideration nonlinear visco-elastic interactions among the brush, the slip-ring and the brush holder. The results of calculations of radial vibrations of the brush were used to determine the resistance of the transition between the brush and the slip-ring. A nonlinear dependence of this transition resistance R(sp) has been proposed. It is assumed that R(sp) is a function of current flowing through the brush and of the distance between the sliding surfaces of the brush and the slip-ring. Several simplifying assumptions had to be adopted while deriving this dependence. Necessity of simplifications is a result of complexity of the problem as well as the lack of some essential parameter data in literature. On the basis of the sliding contact model with a single brush the authors have worked out an electromechanical model of the whole sliding contact of a synchronous machine with parallel brushes. This model allows for determination of current distribution in the sliding contact during transient states and for steady states. The angular speed and the excitation current can be a time dependant forcing. Simulation results of the influence of the waviness amplitude spectrum on current distribution in the sliding contact have been shown.

Słowa kluczowe

PL

maszyny elektryczne; maszyny synchroniczne; szczotka elektryczna; zestyk ślizgowy; diagnostyka zestyku ślizgowego; model matematyczny

• Wydawca: Sieć Badawcza Łukasiewicz - Górnośląski Instytut Technologiczny
• Czasopismo: Maszyny Elektryczne : zeszyty problemowe
• Rocznik: 2005
• Tom: Nr 72
• Strony: 81--86
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Wilk A.

• Politechnika Gdańska, Gdańsk

autor

Dobrowolski P.

• Politechnika Gdańska, Gdańsk

autor

Kostro G.

• Politechnika Gdańska, Gdańsk

Bibliografia

• [1]. Bar G., Hilpert G.: Brush wear and contact resistance in electrical slip ring contacts. Zeitschrift für Elektrische Informations – und Energitechnik, vol.4, no.2, 1974, pp.86-96. Germany.
• [2]. Chow T. W. S., Bishop H. W.: The effect of high current density and uneven current distribution on a current collection system. IEEE Transactions on Components Hybrids & Manufacturing Technology, vol.14, no.3, Sept. 1991, pp.650-656. USA.
• [3]. Dabrowski M., Idziak P.: An impact of some parameters of sliding contact on tangential vibrations of a brush. Przeglad Elektrotechniczny, vol.63, no.10, Oct. (1987) 269-71, Poland.
• [4]. Dridzo M. L., Glebova Iyu.: Radial mechanical vibrations of electrical-machine brushes. Elektrotekhnika, vol.55, no.8, (1984) 11-13, USSR.
• [5]. Gabrielli G., Schweitzer G.: Thermoelastic effects on slipring surface leading to brush vibrations. IEEE Transactions on Energy Conversion, vol.6, no.3, Sept. (1991) 522-528, USA.
• [6]. Holm R.: Electric Contacts. Springer-Verlag Berlin, Heidelberg, New York, 1979.
• [7]. Idziak P.: Wpływ wybranych czynników mechanicznych na spadek napiecia w zestyku ślizgowym maszyny elektrycznej. XXVII Sympozjum Maszyn Elektrycznych, Sopot, 19-21 wrzesnia 1991, s.106-114.
• [8]. Muszalski Z.: Teoria i fizyka komutacji maszyn elektrycznych. PWN Warszawa 1997.
• [9]. Плохов И. В.: Исследования механических свойств щетoчного контакта електрических машин XXVII Sympozjum Maszyn Elektrycznych, Sopot, 19-21 września 1991, s.97-105.
• [10]. Wilk A., Moson I.: The wave character of commutator wear in electrical machines. Wear 253 (2002) 935-945.
• [11]. Wilk A., Moson I., Kostro G., Dobrowolski P., Ronkowski.: Influence of the wave character of commutator wear on the vibration dynamics of the sliding contact in AC commutator motors. XVI International Conference on Electrical Machines – ICEM’2004, Sept. 5-8, 2004, Cracow, Poland, CDROM.