The invention discloses a traction transmission system. The system comprises an industrial frequency transformer, a multi-traction converter and a multi-phase traction motor, wherein the single-phase alternating current ends of the traction converters are sequentially connected in series between the secondary side output ends of the industrial frequency transformer to form a cascaded H-bridge structure; and the three-phase alternating current end of each traction converter is connected with a group of stator windings of the multi-phase traction motor, so that each traction converter jointly drives the multi-phase traction motor. The multi-phase traction motor is driven by adopting a topological structure of the multi-cascade traction converter, so that the power output pressure of a single traction converter is reduced, and conditions are created for the use of low-voltage-grade power semiconductor devices; therefore, on the basis of the advantages of small packaging, low price, high maturity and low loss of the low-voltage-level power semiconductor device, miniaturization and light weight of system equipment can be realized, and the working frequency, the power density and the stability of the system are improved.

    本申请公开了一种牵引传动系统,该系统包括工频变压器、多重牵引变流器和多相牵引电机;其中,各重所述牵引变流器的单相交流端依次串联在所述工频变压器的副边输出端之间,构成级联H桥结构;各重所述牵引变流器的三相交流端分别与所述多相牵引电机的一组定子绕组连接,以便由各重所述牵引变流器共同驱动所述多相牵引电机。本申请采用多重级联式牵引变流器的拓扑结构驱动多相牵引电机,降低了单重牵引变流器的功率输出压力,为低电压等级功率半导体器件的使用创造了条件,从而能够基于低电压等级功率半导体器件封装小、价格低、成熟度高、损耗低的优势,帮助实现系统设备的小型化、轻量化,提高系统的工作频率、功率密度和稳定性。


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    Title :

    Traction transmission system


    Additional title:

    一种牵引传动系统


    Contributors:
    QI YU (author) / MEI WENQING (author) / LIU LIANGJIE (author) / DOU ZECHUN (author) / LIU XIONG (author) / XIE YUECHENG (author) / LIU BIN (author)

    Publication date :

    2022-10-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B61C Lokomotiven , LOCOMOTIVES



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