Converter Transformers are equipment which convert the voltage and the frequency of the system voltage. Converter Transformers are used in applications such as Variable Frequency Drives, Electric Traction, copper refining and even in HVDC Transmission.
Converter Transformers have a converter unit on the primary or secondary side. The voltage is stepped up or down in the transformer and then converted into the desired frequency in the converter circuit. Alternatively, the frequency can be changed in the converter prior to stepping the voltage up or down.
Converters are used to couple two AC power systems asynchronously.
Converter Transformers are designed to withstand high harmonic content.