大型矿用电动轮自卸车主辅一体牵引系统研究  

Research on the Main and Auxiliary Traction System of Large-size Mine Electric-wheel Dump Truck

作　　者：胡仙 张邦富 梅文庆 周志宇 HU Xian;ZHANG Bangfu;MEI Wenqing;ZHOU Zhiyu(CRRC Zhuzhou Institute Co.,Ltd.,Zhuzhou,Hunan 412001,China)

机构地区：[1]中车株洲电力机车研究所有限公司,湖南株洲412001

出　　处：《控制与信息技术》2022年第5期114-121,共8页CONTROL AND INFORMATION TECHNOLOGY

基　　金：国家重点研发计划(2021YFB2501803)。

摘　　要：目前,国内大部分矿用电动轮自卸车的电驱系统由柴油机带动风机对其辅助传动系统进行散热,并由柴油机的转速来控制散热风机的风量,无法实时变频调节散热功率,致使制动工况下柴油机的油耗增加;另外,其牵引系统采用矢量控制方式,存在工况快速切换下转矩响应慢的问题。对此,文章设计了一种大型矿用电动轮自卸车主辅一体拓扑架构的变流器,并对其主辅一体牵引控制系统进行了研究。在整车牵引控制系统中,主传动牵引采用高动态性能的直接转矩控制算法以驱动两台960 kW的异步电机,辅助传动系统通过带隔离变压器的DC/DC前端控制再到DC/AC的后端变频控制,保证风机和水泵类负载全频率范围稳定运行。目前,装载此主辅一体牵引系统的电动轮自卸车在山西平朔煤矿已稳定运行3571 h,累计行程31632.4 km,运输量达1445276 t,表明了此主辅一体牵引系统可稳定、可靠、高效地工作。At present, auxiliary traction control system of most electric-wheel dump trucks in domestic market is driven by diesel engine to drive cooling fan to dissipate heat, the cooling power cannot be changed by frequency conversion, and the fuel consumption of diesel engine will increase under braking conditions. In addition, the traction strategy adopts the field orientation control, which has the problem of slow torque response under fast switching conditions. In this paper, an integrated main and auxiliary converter of high power electric-wheel dump truck is designed and its traction control system is investigated. In the vehicle traction control system, the main traction system adopts high performance direct torque control algorithm to drive two 960 kW induction motors. For the auxiliary traction system, it is controlled by DC/DC front-end with isolation transformer and then DC/AC back-end inverter. The back-end inverter guarantees stable operation of fan and pump loads in full frequency range. At present, the dump truck loaded with this integrated main and auxiliary traction system has been running stably for 3 571 h in Shanxi Pingsu Open-pit Coal Mine, with a cumulative travel distance of 31 632.4 km and a transportation volume of 1 445 276 tons in total, which shows that this traction system can work stably, reliably and efficiently.

关 键 词：电动轮自卸车 交流传动系统 主辅一体 直接转矩控制 

分 类 号：TD571[矿业工程—矿山机电]