Low-frequency transformateurs are used to propagate signal voltage and signal power, and are also used to achieve impedance matching between circuits, with isolation function.
In general, low-frequency transformateurs refer to "power frequency transformateurs" utilisé pour changer la tension en dessous de (50 Hz), et le noyau de fer est généralement une tôle d'acier au silicium à haute conductivité magnétique.
High-frequency transformateurs refer to transformateurs that operate at high frequencies as energy changes. Due to the high frequency of the magnetic field, the silicon steel sheet will produce eddy currents (the conversion speed of the small magnet in the silicon steel sheet cannot keep up), so the high-frequency transformateur generally uses "high-frequency ferrite" as the magnetic core.
There is no difference in principle between high-frequency transformateurs and low-frequency transformateurs, but due to the different frequencies of high-frequency and low-frequency, the iron core used for transformateurs is also different.