110kV multipurpose high-efficiency and energy-saving rectifier transformer special for producing silicon carbide

Abstract

The invention discloses a 110kV multipurpose high-efficiency and energy-saving rectifier transformer special for producing silicon carbide. In the rectifier transformer, two transformers are combined up and down by a conjugated structure and are put into the same oil tank; primary windings of the two transformers are in star connection on the high-voltage side of the rectifier transformer to forma parallel connection structure, a winding on the upper part of the rectifier transformer winds rightwards on the low-voltage side of the rectifier transformer to form a delta connection mode, and a winding on the lower part of the rectifier transformer winds leftwards on the low-voltage side of the rectifier transformer to form a Y connection mode; the secondary side outputs of the two transformers have an angular difference of 30 degrees; outgoing line ends of the transformers are connected with an external rectifier bridge to form a 12-pulse wave rectification system; and filtering windings on the upper and lower parts are connected in parallel to form a filtering winding, and the output of the filtering winding is connected with inductance capacitance (LC) filtering equipment. The output ends of the rectifier transformer are connected in series and parallel by controlling the output of the rectifier transformer through an external change-over switch, so that the output of direct-current voltage is increased doubly, the requirement of smelting production of black silicon or green silicon is met, raw materials are saved, and the aims of saving energy and reducing consumption andthe manufacturing cost of products are fulfilled.

Description

technical field [0001] The invention relates to a rectifier transformer, in particular to a high-efficiency and energy-saving rectifier transformer dedicated to the production of 110kV multi-purpose silicon carbide. Background technique [0002] The silicon carbide industry is an industry with high energy consumption and high pollution. With the adjustment of the industrial structure of the country, the production equipment with low production capacity and high energy consumption has been eliminated. In the past, some small and medium-sized enterprises were forced to shut down or replace large-capacity production equipment, increase production capacity and reduce energy consumption. In the smelting process of silicon carbide, green silicon and black silicon have different requirements for equipment. The smelting of black silicon requires low voltage and high current, while the smelting of green silicon requires higher voltage and lower current than that of black silicon. , ...

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Problems solved by technology

But so far, there is no relevant report on a rectifier transformer that can meet the production needs of smelting black silicon or green silicon at the same time.

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