Double pulse combined type transformer

Abstract

The invention relates to a double pulse combined type transformer, comprising an iron core, a coil and a support frame, wherein, the coil is three-phase; each phase is divided into three sections of an upper winding, a middle winding and a lower winding along the axial direction of the iron core; the upper winding, the middle winding and the lower winding respectively have a primary side coil anda secondary side coil; the spacing between the upper winding and the middle winding is greater than one third of the axial height of the upper winding; the primary side coil at the upper part of the upper winding adopts a D connection and the secondary side coil at the upper part adopts Y connection; the primary side coil at the middle part of the middle winding adopts D connection and the secondary side coil at the middle part adopts Y connection; the primary side coil at the lower part of the lower winding adopts D connection and the secondary side coil at the lower part adopts D connection;and the primary side coil at the middle part of the middle winding is in parallel connection with the primary side coil at the lower part of the lower winding through an outer lead wire. The invention can satisfy the requirements of using two groups of rectifying devices with different pulse waves simultaneously, thus greatly reducing device manufacturing cost and saving installation space.

Description

technical field [0001] The invention relates to a special rectifying transformer, in particular to a dual-pulse combined transformer capable of simultaneously meeting the requirements of two pulse waves of 12-pulse and 6-pulse. Background technique [0002] The frequency conversion speed regulation energy-saving technology is widely used, and the frequency conversion rectifier transformer is an important part of the frequency conversion system. The rectification system is generally divided into 6-pulse, 12-pulse, 18-pulse and other systems. According to actual usage, it is sometimes required to use two rectification systems with different pulses at the same place. The common practice in existing technologies to meet this special requirement is to use two mutually independent transformers for joint operation. In this way, the manufacturing cost of the transformer is greatly increased, and the occupied area is also doubled, and the cost of related facilities such as power di...

AI Technical Summary

Problems solved by technology

In this way, the manufacturing cost of the transformer is greatly increased, and the occupied area is also doubled. At the same time, the cost of related facilities such as power distribution is also increased accordingly.

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