2. Features

Depending on the power, characteristics and performance required, DC/AC converters also differ in terms of the semiconductors used and their operating modes:

• switches are bidirectional in voltage and unidirectional in current in current switches, making them the preferred application for thyristors;

• switches are bidirectional in current and unidirectional in voltage in voltage inverters; these switches always consist of a controllable semiconductor connected in antiparallel with a diode and, for this reason, voltage inverters are the preferred field of application for modern power semiconductors, which are fast but support little (or no) reverse voltage.

The frequency of the alternating waves must be equal to the...