An electronic voltage regulating electric furnace transformer

Abstract

The invention discloses an electronic voltage-regulating electric furnace transformer, which is a three-phase structure, including three three-winding transformers, three converters and an AC-DC converter; the three three-winding transformers and the three converters belong to the ABC three-phase ; Each three-winding transformer includes a high-voltage winding, a working winding and a control winding, and the number of turns of the working winding is much smaller than the number of turns of the control winding; each converter is composed of a single-phase converter and a transformer, and the number of turns of the primary winding of the transformer is much larger The number of turns of the secondary winding; the high-voltage windings of the three three-winding transformers are respectively connected to the three phases of the power supply; the three-phase input terminals of the AC-DC converter are respectively connected to the control windings of the three three-winding transformers; for each converter In other words, the DC side of the single-phase converter is the input terminal of the converter, respectively connected to the three-phase output terminals of the AC-DC converter, the AC side of the single-phase converter is connected in parallel with the primary winding of the transformer, and the secondary winding of the transformer is connected in series with each On the output line of the working winding of the winding transformer; the invention adopts the electronic stepless continuous voltage regulation method to realize the large-scale, rapid and continuous adjustment of the output voltage of the electric furnace transformer.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and more specifically relates to an electronic voltage-regulating electric furnace transformer. Background technique [0002] In large-scale industrial enterprises, such as metallurgical industry, chemical industry, machinery industry, etc., the electric furnace is an important process equipment, and the importance of the electric furnace transformer as the power supply of the electric furnace is self-evident. [0003] The electric furnace transformer has the characteristics of heavy load on the auxiliary side, low voltage and high current, etc., and its load characteristics change with the smelting stage; Frequent adjustment actions and more precise adjustment accuracy, and due to its harsh working conditions, the electric furnace transformer needs to have a high overload capacity and a high insulation level; on the other hand, the frequent ignition and extinguishment of the arc d...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides an electronic voltage-regulating electric furnace transformer, the purpose of which is to solve the technical problems in the prior art that the electric furnace transformer has a large number of taps and the quality of the output voltage is difficult to control

Images