The working principle of the transformer

Transformer is a device that uses the principle of electromagnetic induction to change AC voltage. The main components of the transformer are primary coil, secondary coil and iron core (magnetic core). In electrical equipment and wireless circuits, it is often used for voltage rise and fall, matching impedance, safety isolation, etc. In the generator, whether the coil moves through the magnetic field or the magnetic field moves through the fixed coil, the potential can be induced in the coil. In both cases, the value of magnetic flux remains unchanged, but the number of magnetic flux in the chain intersecting with the coil changes, which is the principle of mutual inductance. Transformer is a device that uses electromagnetic mutual inductance to transform voltage, current and impedance.