Design principle of high frequency transformer

Design principle of high frequency transformer   Design principle: When designing a high-frequency transformer, the leakage induction and distributed capacitance of the transformer must be minimized, because the high-frequency transformer in the switching power supply transmits high-frequency pulse square wave signals. During the transient process of transmission, leakage sensing and distributed capacitance can cause surge current and peak voltage, as well as top oscillation, resulting in increased loss. Usually, the leakage inductance of the transformer is controlled by 1% to 3% of the primary inductance. Leakage of the primary coil ---- The leakage of the transformer is caused by the incomplete coupling of the magnetic flux between the primary coil and the secondary coil, between layers, and between turns. Distributed capacitance ---- The capacitance formed between the turns of the transformer winding, between the upper and lower layers of the same winding, between different wi…