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