POWER ELECTRONICS, RECTIFIERS, AND PULSE-WIDTH MODULATION INVERTERS:FILTERING RECTIFIER OUTPUT

FILTERING RECTIFIER OUTPUT

Low-pass filters are used to smooth the output of any of these rectifiers by removing ac frequency components from the output. The common filter elements used to smoothen ac voltage changes are

1. Capacitors connected across the line.

2. Inductors connected in series with the line

Rectifier circuits use a single series inductor as a common filter or a choke (Fig. 9.17).