短初级双三相直线感应电机驱动系统能量链切换控制策略

Energy chain switching control strategy of short primary dual three-phase linear induction motor drive system

为了避免两条独立能量链驱动的电机系统故障时刻故障能量链切除导致非故障能量链输出电流突增,实现系统故障模式下单能量链的安全运行,以工作于瞬态加速工况的短初级双三相直线感应电机为研究对象,给出了电机的控制模型。根据电机单能量链的运行特性,提出一种系统故障模式下的能量链切换控制策略,即在系统出现能量链故障后切除故障能量链、非故障能量链的外环参考加速度降为故障前的四分之一。结合系统的控制架构,给出了一种通用的能量链切换实现方法。实验验证了所提出控制策略的正确性与可行性。

In order to avoid the sudden increase in the output current when the fault energy chain of the motor system driven by two independent energy chains is cut off and to realize the safe operation of the single energy chain under the fault mode of the system,the short primary dual-phase linear induction motor which operates in transient accelerating conditions was taken as an object of study,and the motor control model was given.According to the operation characteristics of the single energy chain of the motor,an energy chain switching control strategy under the fault mode of the system was proposed.Namely,when the system fails,the fault energy chain was cut off and the non-fault energy chain keep operating by reducing the reference acceleration of the outer ring to one quarter of that before the fault.Considering the control architecture of the system,a general software implementation method of energy chain switching strategy was proposed.The correctness and feasibility of the proposed control strategy are verified by experiments.