Abstract
Peculiarities of discharge that is initiated by a flawed section of wire insulation that passes through a primary gas-discharge flaw transducer have been studied. Analysis of the structure of signals has been carried out, and possible mechanism and type of discharge in the sensor have been considered. Informative zones have also been singled out in the signal structure. A technique is described for testing enamel-insulated wires for flaws. The technique makes it possible to determine the number and extent of flawed sections in an enameled wire that is fed through the system at any variable speed. Ways and means are considered for reducing the errors in evaluating the number and extent of flaws. Flow chart of a faultiness-measurement device is suggested, and the principle of its operation is described.
Similar content being viewed by others
References
Sullivan, Ch., Aluminum windings and other strategies for high-frequency magnetic design in an era of high copper and energy costs, IEEE Trans. Power Electron., 2008, vol. 23, no. 4, pp. 2044–2051.
Kimura, K., Ushirone, S., Koyanagi, T., and Hikita, M., PDIV characteristics of twisted-pair of magnet wires with repetitive impulse voltage, IEEE Trans. Dielectr. Electr. Ins., 2007, vol. 14, no. 3, pp. 744–750.
Knych, A., Mamala, M., and Jablonskiand and Uliasz, P., A new generation of aluminum enameled winding wires, Wire J. Int., 2013, vol. 45, no. 1, pp. 55–61.
Smirnov, G.V., Khasanov, O.L., Smirnov, D.G., Polisadova, V.V., Petyukevich, M.S., and Bikbaeva, Z.G., Application of magnetic-dielectric composite based on ultradisperse powder of nickel-zinc particles for resource-saving technologies for impregnation of windings of electric machines, Izv. Tomsk Polytech. Univ., Inzh. Georesur., 2015, vol. 326, no. 11, pp. 106–117.
GOST (State Standard) IEC 60851-5-2011: Winding Wires. Test Methods. Part 4. Electrical Properties, Moscow: Standartinform, 2013.
IEC (International Standard) 60851-5:1996: Methods of Testing for Winding Wires–Part 5: Electrical Properties, Geneva: Int. Electrotech. Comm., 2004.
Smirnov, G.V., Nadezhnost’ izolyatsii obmotok elektrotekhnicheskikh izdelii (Reliability of Insulation of Windings in Electrotechnical Machines), Tomsk: Tomsk. Gos. Univ., 1990.
Smirnov, G.V. and Smirnov, D.G., RF Patent 2521439, Byull. Izobret., 2014, no. 18.
Smirnov, G.V. and Smirnov, D.G., RF Patent 2506601, Byull. Izobret., 2014, no. 4.
Raizer, Yu.P., Fizika gazovogo razryada (Physics of Gas Discharge), Moscow: Intellekt, 2009.
Afanas’ev, S.B., Lavrenyuk, D.S., Petrushenko, I.N., and Stishkov, Yu.K., Peculiarities of the corona discharge in air, Tech. Phys., 2008, vol. 53, no. 7, pp. 848–852.
Howatson, A.M., An Introduction to Gas Discharges, New York: Pergamon, 1976, 2nd ed.
Kozlov, B.A. and Solov’ev, V.I., Numerical simulation of stationary negative corona in air, Tech. Phys., 2009, vol. 54, no. 5, pp. 621–630.
Razevig, D.V. and Sokolova, M.V., Raschet nachal’nykh i razryadnykh napryazhenii gazovykh promezhutkov (Calculations of Initial and Discharge Voltages in Gas Gaps), Moscow: Energiya, 1977.
Loeb, L.B. Fundamental Processes of Electrical Discharge in Gases, New York: Wiley, 1939.
Al-Harthi, F.M.A., Omarov, O.A., Omarova, N.O., Omarova, P.Kh., and Khachalov, M.B., Role of thermoelectron emission in the formation and development of spark-discharge channel in gases, Prikl. Fiz., 2015, no. 3, pp. 52–56.
Ashurbekov, N.A. and Iminov, K.O., Stratification of the plasma column in transverse nanosecond gas discharges with a hollow cathode, Tech. Phys., 2015, vol. 60, no. 10, pp. 1456–1463.
Smirnov, G.V., Device for measuring faultiness of insulation of winding wires, Defektoskopiya, 1989, no. 5, pp. 93–94.
Smirnov, G.V. and Volkov, S.A., Electrical impregnation of windings of electrotechnical devices, Dokl. Tomsk. Gos. Univ. Sist. Uprav. Radioelektron., 2004, no. 2 (10), pp. 107–111.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © G.V. Smirnov, D.G. Smirnov, 2016, published in Defektoskopiya, 2016, No. 8, pp. 63–74.
Rights and permissions
About this article
Cite this article
Smirnov, G.V., Smirnov, D.G. Nondestructive testing for flaws in the insulation of winding wires. Russ J Nondestruct Test 52, 469–477 (2016). https://doi.org/10.1134/S1061830916080088
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1061830916080088