ACS355 Can't Move The Motor shaft .
I am having a trouble using VFD ACS355 in controlling wheat xxxx , when the speed is decreased from 50 Hz to 19 Hz it worked because the wheat weighted above the xxxx conveyor 5 tons. But, when the weight increased to 18 tons, the drive was unable to move the xxxx . I increased the toruqe of the VFD but it did not work, I used the defualt abb standart in 9902 and the motor was 5hp and the VFD was 7.5 hp . PS: I replaced ACS355 To Delta VFD , it works. So, I need to know what I missed out in ABB, shoud I use torque control? Is ACS355 suitable for this application .
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