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E800变频器先进磁通矢量控制的调试

2023-11-09
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E800变频器先进磁通矢量控制的调试



前言

在工业和民用上都有很多的电机拖动系统,例如:风扇、水泵、机床、卷绕机、电梯、传送带、起重机、卷扬机、注塑机等。


大多数场合使用V/F控制就可以达到控制要求,然而也有一些场合在使用V/F控制容易出现过载,例如在低速大转矩输出的场合,那我们可以考虑采用矢量控制方式解决过载问题。


本文就用FR-E840-0120(5.5K)为例,来告诉大家如何进行先进磁通矢量控制的调试。



1

通过查电机的铭牌,收集相关参数


电机额定功率:4.0KW

电机额定电流:8.8A

电机额定电压:380V

电机额定频率:50Hz

电机极数:4


2

变频器相关参数设定


●PR9=电子过热保护(设定电机额定电流8.8A) 

●PR71=适用电机(设定3 标准电机)

●PR80=电机容量(设定适用的电机容量4.0KW) 

●PR81=电机极数(设定电机极数4)       

●PR83=电机额定电压(设定电机额定电压380V)  

●PR84=电机额定频率(设定电机额定频率50HZ)             

●PR800=控制方法选择(设定20 先进磁通矢量控制)

●PR96=自动调谐设定(设定1离线自动调谐)   



3

操作步骤


以面板操作为例,按上述顺序设定参数后,进入监视状态后面板显示“1”,接下来按"RUN”按钮,面板显示会从“1”变化为“2” (同时可听到电机嗡嗡的声音,说明调谐正常) ,大约经过30S~1min后,直到面板显示为“3”,此时自学习结束,按复位键“STOP/RESET”即可,具体操作步骤请参考图所示:




4

离线自调谐结束


此时可以查看以下一些参数的变化,初始值是9999,如果不是9999那说明参数已调整:


● Pr.82 (电机励磁电流)
● Pr.90 (电机常数R1)
● Pr.91 (电机常数R2)
● Pr.92 (电机常数L1)

● Pr.93 (电机常数L2)
● Pr.94 (电机常数X)



5

小结


?先进磁通矢量控制方式通常应用在速度控制要求较高的场合,例如空压、卷扬设备,低速转矩较高等;

?磁通矢量控制要求一拖一;

?自学习时,变频器与电机容量之间差别太大,容易导致“98”报警;

?先进磁通矢量控制,在0.5Hz时,转矩输出可达到150%;

?当Pr.80或Pr.81=“9999”时,与Pr.800的设定值无关,控制方式均为V/F控制。




END




(注:本文为“海亿自动化”原创文稿,如需转载,请标明出处并附上原文链接。)




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