转速闭环控制的矢量变频器仿真

Simulation of vector frequency converter for closed loop speed control

为了实现变频器各种故障复现试验和参数调整的需要,根据变频器的组成电路和控制器的数学模型,应用Matlab/Simulink软件,建立了基于转速闭环控制的矢量变频器,并利用模型就一起由于整流器触发电路开路引起的直流母线电压欠压故障进行了仿真,仿真结果表明,对于矢量变频器,整流元件没有触发造成的缺相使中间直流母线电压下降较正常情况明显,从而解释了故障发生的机理,同时验证了模型的正确性。

To realize the frequency converter＇s failures recurrence test and parameter adjustment, the paper models the vector frequency converter based on the closed loop speed control according to constitute circuits of the converter and mathematical model of the controller with Matlab/Simulink software. It simulates the failure of the DC bus under-voltage due to the rectifier trigger circuit open. The simulating result shows that the middle vohage pressure drop caused by no triggering of the rectifying element is greater than normal condition one. It explains why the failures happen.