Traction transformer

Abstract

The invention discloses a traction transformer, belongs to the technical field of transformers, and solves the problems of low short-circuit resistance, running stability and reliability and the like in the prior art. The traction transformer comprises a single-frame double-column iron core and two columns of high tension coils which are connected in parallel and wound on the iron core; low tension coils T and F are also arranged in the two columns of high tension coils; the low tension coils T and F comprise four one-fourth-column coils T and four one-fourth-column coils F respectively, the coil turns of each one-fourth column are the same, the four one-fourth-column coils T and the four one-fourth-column coils F are averagely distributed in two columns of high tension coils and are symmetrical to each other, the low tension coils of the same name in the same column of the high tension coil are connected in series, and the low tension coils of the same name, which are connected in series, in the two columns of the high tension coils are connected in parallel; and the low tension coil T and the low tension coil F which have a parallel structure are connected in series. The traction transformer can effectively improve short-circuit resistance capacity, and improve running safety reliability.

Description

technical field [0001] The invention belongs to the technical field of transformers and relates to a traction transformer. Background technique [0002] With the vigorous development of my country's high-speed railway construction, the demand for railway traction transformers is increasing day by day. Manufacturers in the power manufacturing industry have developed various types of traction transformers that are suitable for the majority of railway users, especially now that a large number of AT power supply methods are used. In this power supply mode, two single-phase traction transformers are connected to V to supply power to the locomotive. [0003] This kind of transformer has two structures, the first one is as image 3 As shown, the structure is that the iron core adopts a single-frame double-column type. The high-voltage coil is divided into two columns, A and X, and the two-column high-voltage coils are connected in parallel. A and X are the lead wires of the high-vol...

AI Technical Summary

Problems solved by technology

Figure 4 The high-voltage short-circuit currents of the two columns are symmetrical, but the two 1 / 2-column T coils are arranged in different positions, resulting in unequal impedances to the two high-voltage coils. In this way, the short-circuit forces of the high-voltage two-column coils are inconsistent

Therefore, there are certain defects in the anti-short circuit capability and operational safety and reliability of these two kinds of traction transformers

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