The difference between DC transformer and AC transformer

　The transformer is a device that can change the voltage made by the principle of electromagnetic induction. The transformer consists of an iron core and a coil. The transformer coil is divided into a primary coil and a secondary coil when the primary coil is energized with alternating current. The transformer core produces an alternating magnetic field. The secondary coil induces an alternating current transformer with the same frequency as the primary. The winding ratio of the transformer coil is equal to the voltage ratio. For example, the primary coil of a transformer has 880 coils and the secondary coil has 88 coils. Connect 220V voltage at the primary level. The secondary will output an AC voltage of 22V.

　Transformers can not only step down but also step up. Long-distance power transmission generally uses transformers to step up the voltage. The use of a transformer to reduce the voltage to the voltage we need is not true of DC transformers. DC power cannot be transformed. To convert the voltage of DC power, first use electronic components to convert DC power to AC power and then use a transformer to convert the voltage. This device is called an inverter.
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