154T电动轮自卸车转矩脉动仿真

针对154T电动轮自卸车600 kW异步电动机在实际调试过程中出现转矩脉动现象,分析了引起转矩脉动原因,并提出了一种新型的死区效应补偿方法.对常规的死区效应补偿方法电流反馈法中难以准确采集零点问题,设计了准确采集零点的硬件电路,对电压反馈法进行了改进,设计了一种二输入-二输出的模糊自适应PI死区补偿控制器,它能实时地调节电压空间矢量作用时间(即实时对死区时间进行补偿).最后,分别进行了仿真或实验,仿真和实验结果表明,电流反馈法中准确采集零点问题得到有效地解决及异步电动机转矩脉动得到有效抑制.

Simulation of the torque ripple of 154T electrically wheeled autonomous dump truck

In order to solve the torque ripple problem in the space vector control system of the 600 kW asynchronous motor of 154T electrically wheeled autonomous dump truck,and the problem that is difficult to sample zero accurately in current feedback compensation of dead zone using the conventional method,a hardware circuit that can sample data accurately is presented in this paper,a two-input two-output adaptive fuzzy controller is designed to solve the torque ripple problem,and thereby adjust the acting time of effective voltage space vector in real time,namely to compensate dead-zone time in real time.The simulation results show that the zero-sampling problem is solved effectively in the current feedback method,and asynchronous motor’s torque ripple is also controlled effectively.At the same time,the stability of the whole system is improved.