Modeling and suppression of PWM inverter's adverse effects

Modeling and suppression of PWM inverter's adverse effects are studied in this paper. The estimation of conducted disturbances and other adverse effects of PWM inverter by simulation offer a considerable gain from the economic point of view. For an accurate model of the motor drive system included mains, rectifier, inverter, motor and its long cables, the high frequency parasitic current paths are taken into account. The novel model and its parasitic values for three-phase induction motor system are presented. Finally a new solution for suppressing EMI, common mode voltage, leakage current, bearing current and shaft voltages is proposed and the results shown the excellent performances of proposed solution including active and passive filters

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