v/x wiring wound core traction transformer

Abstract

The invention discloses a V / X wiring wound core traction transformer, and relates to a transformer. At present, a laminated core is adopted in the V / X wiring wound core traction transformer, leading to the defects of large usage quantity of silicon steel sheets and great no-load loss. The V / X wiring wound core traction transformer comprises two single-phase transformers, wherein the two single-phase transformers are combined into one traction transformer through a wiring; each of the two single-phase transformers comprises a core and a winding winding the core; the cores have circular-section single-frame enclosed structures formed by winding the silicon steel sheets; each of the two cores with the single-frame enclosed structures constructs two main columns, an upper yoke and a lower yoke respectively; one single-phase transformer is provided with a core with the single-frame enclosed structure; one main column is provided with an inner low-voltage winding, an outer low-voltage winding and a high-voltage winding which are arranged concentrically; the inner low-voltage winding on one main column is connected in series with the outer low-voltage winding on the other main column of one single-phase transformer; and the high-voltage windings of one single-phase transformer are connected in series. According to the technical scheme, the usage quantity of the silicon steel sheets is small, and the no-load loss is small.

Description

technical field [0001] The utility model relates to a transformer, in particular to a V / X connection winding core traction transformer. Background technique [0002] At present, there are four commonly used power supply methods in my country's electrified railway traction power supply system, namely TR direct power supply method, BT power supply method, TRNF direct power supply method with return flow line, and AT power supply method. Which power supply method to use mainly depends on the driving speed, density and load of the line, as well as the geographical location of the substation. The use of AT power supply method has disadvantages such as complex catenary structure, many power supply auxiliary equipment involved, and large initial investment in construction, but the AT power supply method has become the first choice for high-speed, heavy-duty locomotives due to its own technical advantages. System power supply mode. [0003] The traction transformer used for AT pow...

AI Technical Summary

Problems solved by technology

The disadvantage of using conventional laminated cores is that the amount of silicon steel sheets is too large, which is time-consuming and labor-intensive.

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