多电机拖动皮带输送机恒压频比控制变频器

Multi-Motor Driving Belt Conveyor Inverter Base on VVVF Control

在变频器驱动多机拖动皮带机系统中,一个重要的问题是如何解决系统中各个电动机的功率输出平衡。本文介绍了一种基于恒压频比控制型的多机拖动皮带机变频器。变频器采用主从控制模式,通过对各自有功电流做闭环控制来实现对其输出频率的调整。变频器的输出电压按照恒压频比控制方式,保证了电机气隙磁通的恒定,最终能够达到各个电动机输出功率一致的目的。通过现场的成功应用,证明了恒压频比控制型多机拖动皮带机变频器的有效陛和实用性。

In the application of the Inverter driving Multi-Motor Belt Conveyor system, an important problem is how to ensure the output of the motors balance. A Multi-Motor Driving Belt Conveyor Inverter based on VVVF control was proposed. Master-slave control mode is used in the system. The active current is controled by closed-loop mothod to realize the adjustment of their respective output frequency. The output voltage of the Inverter is according to VF control, it ensures the motor＇s air gap flux constant, and it ensures that the output of the motors are basically consistent. The feasibility and practicability of this Inverter is verified by being successfu~ applied in the Multi-Motor Driving Belt Conveyor system.