Thyristor frequency converters are designed to convert three-phase current of industrial frequency into alternating current of medium frequency and are used to power induction melting furnaces, heating and hardening plants.
The main advantage of thyristor converters in front of electric machines is that due to high efficiency and lack of losses of idling, the power consumption from the network is reduced and operating costs are reduced. Major advantages of the TFC in their adjusting properties. Adjustment of output parameters and power is carried out without switching in power circuits, which makes it possible without cumbersome commuting devices.
Details on the site https://termolit.com/en/thyristor-frequency-converters/