Page 183 - Electrical Equipment Handbook _ Troubleshooting and Maintenance

POWER ELECTRONICS, RECTIFIERS, AND PULSE-WIDTH MODULATION INVERTERS

9.10 CHAPTER NINE

FIGURE 9.13 (a) A full-wave bridge rectifier circuit. (b) The
output voltage of the rectifier circuit. (c) An alternate full-wave rec-
tifier circuit using two diodes and a center-tapped transformer.

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).

Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)
Copyright © 2004 The McGraw-Hill Companies. All rights reserved.
Any use is subject to the Terms of Use as given at the website.