Train main and auxiliary integrated traction converter capable of being axially controlled independently

Abstract

Disclosed is a train main and auxiliary integrated traction converter capable of being axially controlled independently. The train main and auxiliary integrated traction converter comprises two converter units which are independent completely, and an auxiliary inverter, wherein the auxiliary inverter is used for performing free switching in the intermediate link of the two converters through an auxiliary inverter switching apparatus; the back end of the auxiliary inverter is connected with an auxiliary transformer; after voltage drop is performed, the auxiliary inverter supplies electric energy to a charger and an auxiliary machine load; each converter unit comprises a four-quadrant rectifier which is used for performing alternating current-direct current conversion on the bow net single-phase alternating current, a main inverter which is used for converting the intermediate direct current into three-phase alternating current for a traction motor, a charging short-circuited circuit which is used for ensuring the charging and the normal operation of the converters, a grounding detecting unit which is used for monitoring the grounding conditions of each place of the main circuit of the traction converter, and a chopping unit which is used for carrying out overvoltage suppression and rapid discharging in the intermediate link. The train main and auxiliary integrated traction converter has the advantages of simple and compact structure, easy implementation, high reliability and the like.

Description

Technical field [0001] The invention mainly relates to the field of locomotive traction converters, and particularly refers to a train main and auxiliary integrated traction converter capable of independent axle control. Background technique [0002] The application prospects of domestic and foreign EMUs are broad, and there are continuous EMU products or concepts with higher reliability, better safety performance, better comfort performance, and better cost performance. A few developed countries have already mastered a complete set of mature EMU products. technology. At present, the world-wide train market is huge, and EMUs will likely become the main rail transportation tools in most countries. Large-scale construction of high-speed rail lines and intercity EMU lines is being carried out in various parts of our country, which will help ease regional traffic pressure and low-carbon travel. As the power source of the EMU, the traction converter has very important technical and e...

AI Technical Summary

Problems solved by technology

However, there are too many devices on the main circuit, which leads to the heavy weight of the converter, and the parallel connection of the intermediate circuit makes the structural layout troublesome. At the same time, complete axis control cannot be realized in the control. When a serious fault occurs, the fault will often expand and the normal converter unit will also be lost. function, the auxiliary converter is directly connected to the intermediate circuit, when the main converter fails, it often affects its normal operation, and in turn, its failure will also affect the operation of the main converter

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