AC-to-AC converter
A solid-state AC-to-AC converter converts an AC waveform to another AC waveform, where the output voltage and frequency can be set arbitrarily. == Categories == Referring to Fig 1, AC-AC converters can be categorized as follows: Indirect AC-AC (or AC/DC-AC) converters (i.e., with rectifier, DC link and inverter), such as those used in variable frequency drives Cycloconverters Hybrid matrix converters Matrix converters (MC) AC voltage controllers == DC link converters == There are two types of converters with DC link: Voltage-source inverter (VSI) converters (Fig.