Complex sentence: A typical application of a cycloconverter is to use it for controlling the speed of an ac traction motor and most of these cycloconverters have a high power output, of the order a few megawatts and SCRs are used in these circuits.
Split into simpler sentences: A typical application of a cycloconverter is for use in controlling the speed of an AC traction motor. Most of these cycloconverters have a high power output-in the order a few megawatts-and silicon-controlled rectifiers (SCRs) are used in these circuits.