Split-winding transformer

Abstract

The invention provides a split transformer, which includes an iron core and windings. The windings include a high-voltage winding, a low-voltage winding and a voltage-regulating winding. The iron core adopts a four-column structure, including two core columns and two side columns, and two core columns The winding direction of the upper winding is opposite, and the winding order of the winding on the core column is the low-voltage winding, the high-voltage winding and the voltage-regulating winding from the inside to the outside. The low voltage windings are independent of each other. The body structure of the split transformer is the same as that of the main transformer of an ordinary generator, but it is simpler than the structure using the amplitude split method, which can effectively reduce the transportation cost of the transformer, and the split branch can not only operate in a single branch, but also in double branches. Running, good short-circuit resistance.

Description

technical field [0001] The invention belongs to the technical field of transformer manufacturing, and in particular relates to a split transformer. Background technique [0002] The existing split transformers mainly have two forms: amplitude split and axial split. [0003] figure 1 It is a schematic structural diagram of a transformer winding using amplitude splitting in the prior art. Such as figure 1 As shown, in this winding structure, the winding order of the windings on the iron core from inside to outside is: first low-voltage winding 11-voltage regulating winding 14-high-voltage winding 13-second low-voltage winding 12, wherein the high-voltage winding 13 is located at the first Second, the inner side of the low-voltage winding 12, so the high-voltage winding 13 needs to use the end outlet method. When the transformer adopting this type of winding structure is an ultra-high voltage transformer, because its high-voltage winding 13 generally can only adopt the end-...

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Problems solved by technology

like figure 2 As shown, in this winding structure, the winding order of the windings on the iron core from inside to outside is: first low-voltage winding 21-second low-voltage winding 22-high-voltage winding 23-voltage regulating winding 24, wherein the first low-voltage winding 21 It is located on the same concentric circle as the second low-voltage winding 22, and the axial heights of the two are different; the high-voltage winding 23 is connected in parallel up and down, and the middle part of the head end goes out. When the transformer adopting this split form has only one low-voltage winding (i.e. One of the first low-voltage winding 21 and the second low-voltage winding 22) participates in the operation, and the upper and lower parts of the high-voltage winding are about 10% and 90% of the low-voltage capacity operation respectively, and its short-circuit resistance is quite poor

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