A Novel Active Filter for Mitigation of EMI and Other Adverse Effects of PWM Inverter-Fed AC Motor

This paper presents novel active filter for mitigation electromagnetic interference (emi) and other adverseeffects of pulse width modulation (pwm) inverter-fed ac motor system. an active filter proposed anddevised for this system is characterized by sophisticated connection of two small separate filters, capable ofmitigating all the adverse effects. this paper provides high frequency models of pwm inverter, rectifier, dclink, induction motor and long cable. the configuration and design procedure of the proposed filter ispresented. the whole system is modeled and simulated by commercially available simulation software. apractical system with emi measurement system have been suggested to test designed equipment ability inemitting emi and other adverse effects to comply with electromagnetic compatibility (emc) standards. thesimulation results are verified by experimental results, which show the reduction characteristics of the shaftvoltage, bearing current, common mode current, leakage current and emi.