2017

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Ferromagnetic disc as a source of interference audio frequency range
(НТУ "ХПІ", 2017) Petrischev, O.; Pilinsky, V.; Chupakhin, A.; Savchuk, V.
It is shown that, as a result of mechanical oscillations the ferromagnetic disk in a constant magnetic field due to the inverse magnetostriction effect, leads to the magnetization varies with time. This means that metallic parts of electronic equipment, with vibration under magnetic field conditions may be the sources of low-frequency electromagnetic interference. Such sources of mechanical vibrations can take place in the cinema and concert complex hardware room. Mathematical expressions vector of intensity alternating magnetic field in the volume of the oscillating disc of ferromagnetic are derived. The normalized graphics of deflection at the resonant frequencies of the ferromagnetic disc set sizes are presented. The results revealed an important factor in the formation of unintentional electromagnetic interference and are of practical interest in the design of sensitive equipment.