What is the principle of transformer

What is transformer

Transformer is a device that transforms AC voltage, current and impedance. When AC current is connected in the primary coil, AC magnetic flux will be generated in the iron core (or magnetic core), causing voltage (or current) to be induced in the secondary coil. The transformer is composed of iron core (or magnetic core) and coil. The coil has two or more windings. The winding connected to the power supply is called the primary coil, and the other windings are called the secondary coil. 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 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.

Transformer is an electrical appliance that uses the principle of electromagnetic induction to transmit electric energy or signal from one circuit to another

The amount of electric energy transmitted is determined by the power of the consumer.

Principle of high voltage transformer

The transformer mainly uses the principle of electromagnetic induction to work. Specifically, when AC voltage U1 is applied on the primary side of the transformer and the current flowing through the primary winding is I1, the current will produce alternating magnetic flux in the iron core, which will make the primary winding and secondary winding electromagnetically connected. According to the principle of electromagnetic induction, the alternating magnetic flux will induce electromotive force when passing through the two windings, and its size is directly proportional to the number of winding turns and the maximum value of main magnetic flux. The voltage on the side with more winding turns is high, The voltage on the side with few winding turns is low. When the secondary side of the transformer is open circuit, that is, when the transformer is unloaded, the voltage at the primary and secondary terminals is directly proportional to the number of turns of the primary and secondary windings, that is, U1 / U2 = N1 / N2, but the primary and secondary frequencies are consistent, so as to realize the change of voltage.