Design of active common mode noise voltage canceler for SiC inverter fed induction motor drive with reduced common mode voltage PWM

Abstract

This paper presents the design of active common mode noise voltage canceler (ACVC) for induction motor drive with active zero vector pulse width modulation (AZPWM-1). Conventional pulse width modulation (PWM) like space vector pulse width modulation (SVPWM) has a peak to peak (PP) value of common mode voltage (CMV) equal to the DC link voltage. Compared to conventional PWM, AZPWM-1 reduces the PP value of CMV by three times. This leads to reduction in magnetizing inductance of common mode transformer (CMT) and ratings of components used in ACVC. The aforementioned modification in ACVC improves the electromagnetic interference (EMI) performance, reduce the peak value of CMV and ground current with lower magnetizing inductance of CMT.