On the nature of sources of audio-frequency electromagnetic interferences
DOI:
https://doi.org/10.3103/S073527271610006XKeywords:
electromagnetic compatibility, EMC, electromagnetic interference, magnetic field, mechanical vibrations, non-ferromagnetic metal elementAbstract
It has been shown that metal elements of electronic equipment executing mechanical vibrations under exposure to the dc or low-frequency magnetic field could be sources of low-frequency electromagnetic interferences. The general solution of a boundary problem of electrodynamics was obtained that dealt with the electromagnetic field emission by a rod with circular cross-section made of metal of the non-ferromagnetic group under harmonic elastic oscillations in the dc magnetic field. A model example was considered for the situation where a source of low-frequency electromagnetic field was the rod with circular cross-section that executed longitudinal harmonic oscillations of compression–tension at the transverse dc magnetic field. An estimation of numerical values of the intensity of low-frequency magnetic field and the induced voltage of interference were also provided.References
PILINSKY, V.V.; RODIONOVA, M.V.; CHUPAKHIN, A.S. Peculiarities of ensuring the electromagnetic compatibility of modern cinema and concert complex. Part 2. Formation of the electromagnetic environment by power circuits of cinema and concert equipment. Tekhnichna Elektrodynamika, 2009, Special issue “Power Electronics and Energy Efficiency”, p.3-9.
WALRAVENS, C.; VAN WINCKEL, S.; REDOUTE, J.M.; STEYAERT, M. Efficient reduction of electromagnetic interference effects in operational amplifiers. Electron. Lett., Jan. 2007, v.43, n.2, p.84-85, DOI: http://dx.doi.org/10.1049/el:20073026.
RICHELLI, A.; MATIG-A, G.; REDOUTÉ, J.-M. Design of a folded cascode opamp with increased immunity to conducted electromagnetic interference in 0.18um CMOS. Microelectronics Reliability, 2015, v.55, n.3-4, p.654-661, DOI: http://dx.doi.org/10.1016/j.microrel.2014.12.019.
Elliott Cole Reducing Electromagnetic Interference (EMI) With Low Voltage Differential Signaling (LVDS) Application Report SLLA030C. Texas Instruments Incorporated, http://www.ti.com/lit/an/slla030c/slla030c.pdf.
PILINSKY, V.V.; CHUPAKHIN, A.S.; SHVAICHENKO, V.B.; DOVZHENKO, A.A. Analysis of admissible regulated levels of emission and sensitivity of equipment of cinema and concert complex. Tekhnologii EMS, 2015, v.54, n.3, p.18-25.
PILINSKY, V.V.; SHVAICHENKO, V.B.; CHUPAKHIN, A.S. Peculiarities of ensuring the electromagnetic compatibility of modern cinema and concert complex. Part 3. Calculation of the electromagnetic fields at the functionally packed room. Tekhnichna Elektrodynamika, 2012, Special issue “Power Electronics and Energy Efficiency”, p.135-140.
ARMSTRONG, K.; WALDRON, T. AES-X13 and interference-free pro-audio systems. Proc. of IEEE Int. Symp. on Electromagnetic Compatibility, 19-23 Aug. 2002, Sorrento, Italy. IEEE, 2002, v.1, p.434-439, DOI: http://dx.doi.org/10.1109/ISEMC.2002.1032518.
OTT, H.W. Electromagnetic Compatibility Engineering. New York: Wiley, 2009.
PETRISHCHEV, OLEG; RODIONOVA, MARIA; PILINSKY, VOLODYMYR; SHVAICHENKO, VOLODYMYR. Electroacoustic effects as motive of power electronics units EMI generation. Proc. of 19th Int. Wroclaw Symp. & Exhibition on Electromagnetic Compatibility, EMC-2008, 11-13 Jun. 2008, Wroclaw, Poland. Wroclaw, 2008, p.405-410.
SMIRNOV, V.I. The Course of Higher Mathematics, Vol. III, Part I. Moscow: Nauka, 1974 [in Russian].
TIKHONOV, A.N. Mathematical Model, in book Mathematical Encyclopedia, Vol. 3. Moscow: Sov. Entsiklopediya, 1982 [in Russian].
NOVATSKII, V. Theory of Elasticity. Moscow: Mir, 1975 [in Russian].
HUTSON, A.R.; WHITE, DONALD L. Elastic wave propagation in piezoelectric semiconductors. J. Appl. Phys., 1962, v.33, n.1, p.40-47, DOI: http://dx.doi.org/10.1063/1.1728525.
TUCKER, J.W.; RAMPTON, V.W. Microwave Ultrasonics in Solid State Physics. North-Holland Publ. Comp., 1972.
ZHARII, O.Y. On the issue of estimating magnetic effects accompanying propagation of plane waves in piezoelectric medium. DAN USSR. Ser. A: Fiziko-Matem. i Techn. Nauki, 1978, n.8, p.705-709.
PETRISHEV, O.N. Magnetic waves in polarized polycrystalline magnetostriction materials. Vestnik KPI. Elektroakustika i Zvukotekhnika, 1990, n.14, p.23-35.
ABRAMOVITS, M.; STIGAN, I. Reference Book on Special Functions with Formulas, Graphs and Mathematical Tables. Moscow: Mir, 1979 [in Russian, ed. by M. Abramovits].
