直流电机与液力耦合器联合工作特性研究

Joint Working Characteristics of DC Motor with Hydraulic Coupling

为了减少直流电机启动时大电流的作用时间,在电机和负载之间增加液力耦合器降低电机过热烧毁的危险。通过对直流电机和液力耦合器特性的分析,建立直流电机单独工作、直流电机-液力耦合器联合工作情况下的数学模型。运用Matlab软件作系统仿真,绘制系统运行的电流I、输出转速n、输出转矩T的特性曲线图。通过对特性曲线的分析可以得出,电机与液力耦合器联合工作降低了启动电流和启动转矩,减少了电机过流过热和启动转矩对设备零部件冲击破坏的风险,设备抗振动能力提高,对安全作业具有指导意义。

In order to reduce time of large startup current acting on DC motor,a hydraulic coupling is added between motor and load to reduce the risk of motor overheating.Based on analysis of the characteristics of hydraulic Coupling and DC-motor,mathematical models were established for separate working of DC motor and joint working of hydraulic coupling with DC-motor.With simulation software Matlab,graphs are drawn as characteristics of current I and rotation speed n and torque T.On the basis of analysis of the characteristics,it is shown that joint working of DC-motor with hydraulic coupling makes staring-up current and torque decrease,wich reduces risk of over-current or over-load.It improves antiviberation ability of equipment,and provides a guidance to work safety.