Fig. 1.
Single-phase rectifier with passive LC dc bus fIlter and a
three-phase pulse width modulated (PWM) inverter is the
most common industrial solution, [5]. The dc bus capacitor is a
large electrolytic capacitor, while the filter inductor is small or
absent. Such a rectifier works as peak detecting circuit. The dc
bus voltage is charged on the peak mains voltage and the
mains current is a train of narrow pulses. Apart the fact that
such a rectifier is cost effective and robust solution, the drive
manufactures do not recommended it because of some serious
limitations.