不同载荷对双电机驱动系统动态特性影响的研究
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摘要
通过建立采煤机截割部双电机动态力学模型和仿真模型,并应用Matlab对双电机在不同负载情况下动态特性进行了仿真分析,结果表明所建双电机仿真模型能够反映实际运性情况,等效连接刚度对滚筒转速的影响起到主要作用,系统等效刚度越小,弹性缓冲作用越明显,但刚度太小会影响系统稳定性;等效连接刚度的变化对滚筒转速影响较小,适当增大等效连接刚度值可以有效改善双电机同步运性稳定性。
The dynamic mechanical model and simulation model of the double-motor of the shearer cutting section are established,and the dynamic characteristics of the dual-motor under different load conditions are simulated by Matlab. The results show that the dual-motor simulation model can reflect the actual traffic condition. The equivalent joint stiffness plays a major role in the influence of the drum speed. The smaller the equivalent stiffness of the system,the more obvious the elastic buffering effect,but the stiffness is too small,which will affect the stability of the system. The change of the equivalent joint stiffness has little effect on the drum speed. Appropriate increase of the equivalent connection stiffness value can effectively improve the synchronous stability of the dual motor.
The dynamic mechanical model and simulation model of the double-motor of the shearer cutting section are established,and the dynamic characteristics of the dual-motor under different load conditions are simulated by Matlab. The results show that the dual-motor simulation model can reflect the actual traffic condition. The equivalent joint stiffness plays a major role in the influence of the drum speed. The smaller the equivalent stiffness of the system,the more obvious the elastic buffering effect,but the stiffness is too small,which will affect the stability of the system. The change of the equivalent joint stiffness has little effect on the drum speed. Appropriate increase of the equivalent connection stiffness value can effectively improve the synchronous stability of the dual motor.
引文
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[2]郝鹏梅.中国煤炭产业中长期发展趋势预测[J].中国煤炭,2012,38(8):5-8.
[3]陈清泰.中国的能源战略和政策[J].国际石油经济,2003,11(12):18-20.
[4]曾琳.煤炭峰值预测与对策研究[J].煤炭经济研究,2014,34(4):5-9.
[5]韩军峰.大功率电牵引采煤机截割部采用双电机驱动式初探[J].科技情报开发与经济, 2009, 19(31):209-210.
[6]徐志杨,李艾民. 2×132/630-WD采煤机双电机驱动截割部设计[J].煤矿机械,2010,31(8):33-34.
[7]陈伯时.电力拖动自动控制系统—运动控制系统[M].北京:机械工业出版社,2006. 54-62.