The transformer coil is one of the important components of the transformer, the transformer coil is a wire wound coil, used to transmit electrical energy.Transformer coils are generally divided into two types, that is, primary coils and secondary coils. The primary coil is the power input end, also known as the input coil; The secondary coil is the end of the power output, also known as the output coil. The primary coil and the secondary coil are magnetically coupled through an iron core to realize the transmission of electrical energy.