The principle of electric furnace transformer

The principle of electric furnace transformer

Electric furnace transformers are transformers that provide power for various electric furnaces. Industrial furnace transformers can be roughly divided into three categories: resistance furnace transformers, electric arc furnace transformers and induction furnace transformers.

Resistance furnace transformers are used in resistance furnaces and salt bath furnaces for mechanical parts heating, heat treatment, powder metallurgy sintering and non-ferrous metal smelting. Because the resistance of the heating element is too small, or the resistance of the heating element changes too much during the heating process, so It is necessary to install a resistance furnace transformer between the furnace and the grid to reduce and regulate the input voltage of the furnace.

Electric arc furnace transformer A special transformer used to power electric arc furnaces for steelmaking. Large capacity, complex structure, and high technical requirements. The voltage on the secondary side is very low, usually from tens of volts to hundreds of volts, and needs to be able to Regulation over a wider range. Secondary side currents typically reach thousands to tens of thousands of amps.

Structural characteristics of electric furnace transformer:

The iron core of the electric furnace transformer can be made of high quality oriented silicon steel sheet, fully automatic cutting line processing, 45 degree full oblique seam, no punching, no lattice glass tape bonded to paper. The coil can choose the main longitudinal insulation structure, and Reasonably choose the structure and insulation of the winding to make the winding have sufficient mechanical strength. It has the characteristics of strong short-circuit capability, strong overload capability, high efficiency, low loss, safety and reliability.

The working principle of electric furnace transformer:

The transformer is the power transformer of the steelmaking electric arc furnace. The capacity of the electric furnace transformer is configured according to the size of the electric arc furnace and the smelting process. It is required for the pressure regulator. There are 2 types of voltage regulation: on-load regulation and non-excitation regulation. With load The large-scale electric furnace transformer with voltage regulation function does not have series reactor, and the structure of small and medium-sized electric furnace transformer without excitation voltage regulation function can be divided into two types with series reactor and without reactor. These two structures can be divided into two types. type of use. Change the impedance at the secondary voltage.