Working principle of high frequency transformer

In a switching power supply, a high-frequency transformer usually performs fast switching operations through high-frequency switching elements (such as MOSFET, IGBT, etc.). High-frequency current generates an alternating magnetic field through the primary coil of the transformer, and the magnetic field is transmitted to the secondary coil through the iron core or magnetic material of the transformer. Due to its high operating frequency, the transformer is relatively small in size and weight, and can provide high power output in a small space.
Key processes include:
Energy conversion: Electric energy is transmitted in the primary coil of the transformer in the form of a high-frequency signal, and then converted into the required voltage output through the secondary coil.
Voltage rise and fall: By adjusting the turns ratio of the primary and secondary coils, the transformer can achieve voltage increase or decrease to meet the needs of different loads.
Electrical isolation: High-frequency transformers provide electrical isolation between different circuits, effectively avoiding the influence of the high-voltage side on the low-voltage side, and ensuring system safety.