The main function of an IF transformer is to change the voltage and current magnitude, and it can be used to adapt to different power needs by boosting or bucking 
. Specifically, I.F. transformers have several key roles:
1. voltage and current conversion, I.F. transformers are able to convert high voltages into low voltages, or conversely raise low voltages to the required high voltage level.
2. power transmission and distribution. In power systems, IF transformers are used to realize the transmission of voltage and ensure that electrical equipment can operate at a safe voltage.
3. operation regulation, by adjusting the working frequency and output voltage of the transformer, it can help the power system to maintain a stable operation state.
4. Saving resources, by changing the voltage frequency, can reduce the use of copper, so as to save energy and reduce power losses.
5. Industrial frequency transformers are not only used in power system and industrial production, but also widely used in aerospace, communication, subway, high-speed railway and many other fields.
6. In welding, machine tools, lighting and other industries, I.F. transformers are used as a source of stabilizing current, controlling electrode arcs, increasing welding speeds, controlling the speed of electric 
machines, and adjusting the brightness of lamps and lanterns.
7. Phase conversion, I.F. transformers can also transform three-phase power into single-phase power or vice versa. 8.
8. Frequency transformers play a vital role in modern society, both in the normal operation of the power system and in the application of specific industries. 
has an irreplaceable role to play.