What are the functions of power transformers?

A power transformer is a special kind of transformer whose basic structure consists of a primary coil, a secondary coil and an iron core. Power transformers have two functions: one is to convert the AC voltage of the power supply (50Hz frequency and the rated value in the power grid) into AC voltage; the other is to convert electrical energy into DC electrical energy; a power transformer is a transformer that uses the principle of electromagnetic induction to realize electrical energy conversion. , Transformers have power transformers and power converters (or inductors).

The basic structure of transformers can be divided into three types: fixed transformers, variable (electrical) voltage transformers, and semiconductor transformers. The structural characteristics of the fixed transformer are: the primary winding and the primary or secondary winding are encapsulated in a high and low voltage porcelain sleeve, and the high and low voltage windings are placed at both ends of the iron core.


A power transformer is a device that uses electromagnetic induction to change AC voltage and transmit electrical energy. In the power system, the use of power transformers is multi-faceted, and its use is mainly to convert various voltages of the power system into single-phase or single-frequency alternating current; When the changes are inconsistent, the transformation of the transformer and the frequency of the output voltage become a problem. Changing the frequency and amplitude of the AC voltage can adjust the impedance of the load, which has a certain impact on the AC frequency characteristics. The transformer can also overcurrent and transform, so that the power grid maintains a constant voltage, ensures the stability of the load voltage, ensures that the load current is not too large, and ensures the safety of motors, equipment and personnel.

What is the main function of a power transformer?

The main function of the power transformer is to change the voltage and voltage, realize the transmission of electric energy, and realize long-distance transmission. Transformers are widely used to convert voltage at one frequency to voltage at another frequency, or convert voltage at one frequency to voltage at another frequency by extracting excess capacity from the power system. If the excess capacity is to be extracted from the power system, the power transformer must have the function of changing the voltage in order to extract the excess voltage from the grid.