Role of transformer

Transformer is a kind of electrical equipment used for electric energy conversion, it can convert a voltage, current of the AC electrical energy into the same frequency of another voltage, current of the AC electrical energy. Transformers are used in almost all electronic products, and its principle is simple, but the winding process of transformers will have different requirements according to different use occasions (different uses). The main functions of the transformer are: voltage conversion; Impedance transformation; Isolate; Voltage regulation (magnetic saturation transformer), etc., the commonly used core shape of transformers generally has E type and C type core. When a sinusoidal AC voltage U1 is added to both ends of the primary coil, there is alternating current I1 in the wire and produces alternating magnetic flux Phi 1, which forms a closed magnetic circuit along the core through the primary coil and secondary coil. The mutual inductance potential U2 is induced in the secondary coil, and Phi 1 will also induce a self-inductance potential E1 on the primary coil, and the direction of E1 is opposite to the direction of the applied voltage U1 and the amplitude is similar, thus limiting the size of I1