Eng. Ioan TILEA PhD-student, Prof. Eng. Calin MUNTEANU PhD
Rezumat
Interferentele electromagnetice conduse din motoarele asincrone alimentate de invertoare PWM sunt o
problema actuala in sistemele de actionare cu turatie variabila. Interferentele electromagnetice conduse din aceste
sisteme se datoreaza motorului electric si a cablului de alimentare. Analiza caracteristicii impedantei motorului electric
si a cablului de alimentare sunt fundamentale pentru interpretarea emisiilor de mod comun si diferential din sistemele
de actionare cu turatie variabila.
Cuvinte cheie: supratensiuni la motorinvertor motorinterferente electromagnetice
Abstract
Conducted electromagnetic interference (EMI) in induction motor fed from pulse width modulation (PWM)
inverters is one of the most difficult current technical problems in variable speed system. The conducted EMI emissions
in inverter motor system is related to the inverter load which is the induction motor and cable. The analysis of the
impedance characteristic of the motor and cable is fundamental for understanding the common and differential mode
of emissions.
Keywords: motor overvoltageinverter-fed motorelectromagnetic interference
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