Single-phase electric furnace transformer

A single-phase electric furnace and transformer technology, applied in transformers, variable transformers, fixed transformers, etc., can solve the problems of less winding turns, low secondary voltage, etc., to reduce installation space, save space, and reduce material costs. Effect

Active Publication Date: 2015-07-08
ALSTOM TECH LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low secondary voltage and the small number of winding turns, it is impossible to set a voltage regulating tap on the secondary side for constant magnetic flux voltage regulation

Method used

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  • Single-phase electric furnace transformer
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Embodiment Construction

[0027] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0028] The following first reference Figure 2a ~ Figure 9 The basic principles of the present invention are discussed in detail. The single-phase electric furnace transformer 200 of the present invention mainly includes: a single magnetic core 201 , a main transformer 202 and a voltage regulating autotransformer 203 .

[0029] like Figure 2c As shown, the single magnetic core 201 has two side legs 204 and at least one main leg 205 (in Figure 2c There are two main stems in the illustrated embodiment, but an embodiment with only one main stem will be discussed further below). For example, the magnetic core 201 may be an iron core. The two side stems 204 are located on both sides of the main stem 205 .

[0030] back to Figure 2a , the main transformer 202 has a first primary winding 206 and a first secondary winding 207 arranged on at least one main...

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PUM

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Abstract

A single-phase electric furnace transformer is provided according to the basic principle of the invention, comprising: a single magnetic core, said magnetic core comprising two side columns and at least one main column; a main transformer, comprising a first primary side winding and a first secondary side winding which are disposed on said at least one main column, wherein said first primary side winding consists of a first winding and a second winding which are connected in series with each other; and a voltage regulating autotransformer, which is disposed on one of two side columns of said magnetic core, and which comprises a second primary side winding and a second secondary side winding, wherein said second secondary side winding is an adjustable winding having on-load tap switch, and said adjustable winding is connected in series between the first winding and the second winding of said main transformer. The direct effect on the regulating winding and the regulating switch by the over-voltage of the grid can be avoided in the single-phase electric furnace transformer of the invention, and the voltage between two terminals of the primary winding of the main transformer can be reduced. Furthermore, the winding of the voltage regulating transformer is disposed on the side column of the main transformer in the invention, so that the material and the transformer loss can be reduced, and the installation space of the transformer can be decreased.

Description

technical field [0001] The invention relates to a voltage regulation technology of an electric furnace transformer, in particular to a single-phase electric furnace transformer with a novel structure. Background technique [0002] Electric furnaces are used in metallurgy, chemical industry and machinery industry. Furnace transformers are transformers that supply power to these industrial furnaces and can reduce the higher grid voltage to the operating voltage required by the furnace. Since the secondary output voltage of the electric furnace transformer is low (tens of volts to hundreds of volts), the secondary output current is often very large, up to tens of thousands of amps or even hundreds of thousands of amps. Another feature of the electric furnace transformer is that the secondary voltage has a large range of voltage regulation, and sometimes the secondary voltage is required to be adjusted from the highest value to 25% to 50% of the highest value. This makes the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F29/02
CPCH01F27/38H01F29/02H01F27/28H01F29/04H01F30/02H01F38/08
Inventor 官俊军S·蒂里尔利
Owner ALSTOM TECH LTD
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