Transformer is to transform ac voltage, current and impedance of the device, when the primary zhongtong have alternating current coil, iron core (or core) to produce ac magnetic flux, induced in the secondary coil voltage (or current). Transformer is composed of iron core (or core) and the coil, coil, there are two or more than two windings, which connect power winding is called primary coil and the rest of the winding is called secondary coil. In the generator, whether it's movement through the magnetic field or magnetic field coil through fixed coil, all can induction electric potential in the coil, the two cases, the value of the magnetic flux are unchanged, but the fellowship with coil chain there is a change in the number of magnetic flux, this is the principle of mutual induction. Transformer is a kind of using the electromagnetic effect of mutual inductance, transform voltage, current and impedance of the device.

Transformer using the electromagnetic induction principle, from one circuit to another a kind of electric equipment, electric power or transmission signals transmission of electrical energy is decided by using electrical power.


Transformer main application of electromagnetic induction principle to work. Concrete is: when applying ac voltage transformer primary side U1, current flows through a winding for I1, then the current produces alternating magnetic flux in the core, make the primary winding and secondary winding magnetic contact occurs, according to the principle of electromagnetic induction, alternating magnetic flux through the two winding will induction electromotive force, its size and the winding maximum is proportional to the number of turns and main magnetic flux, winding circle number more than one side of the high voltage, low voltage winding circle number fewer side, when the transformer secondary side open, namely the transformer no-load, a voltage of the secondary and a secondary winding is proportional to the number of turns, namely the U1 / U2 = N1 N2, but is consistent with the primary and secondary frequency, so as to realize the change of the voltage.

Penny
2018-08-15

 

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