M
mohamed
hi to all :waving:,
am new in the forum
i have a problem with a dc drive
let me start with the application
it's a centrifugal force pump runs with a dc motor without a gearbox , the operation speed is 1300 rpm working 24/7
the problem is the speed drops from 1300 rpm to 200 rpm instantaneous and back to 1300 rpm without any user interfere . happens at random times like 5 times / h and could be 1 time /day but happen every day
we made some solution but the problem is still on ( until step 5 )
1- change speed reference pot ( 10k ohm , 5k ohm all 10 turns )
2-change start stop push buttons , control relays , power and control cables from panel to motor and from panel to operator panel
3-change speed reference from pot to push button ( option in drive )
4-change motor :38:
5-last changed the control card on the drive
but this made the 1st problem gone and a new one appear
the drive stop without any fault as if someone press stop push button so we change it but the problem still on
can someone help
am new in the forum
i have a problem with a dc drive
let me start with the application
it's a centrifugal force pump runs with a dc motor without a gearbox , the operation speed is 1300 rpm working 24/7
the problem is the speed drops from 1300 rpm to 200 rpm instantaneous and back to 1300 rpm without any user interfere . happens at random times like 5 times / h and could be 1 time /day but happen every day
we made some solution but the problem is still on ( until step 5 )
1- change speed reference pot ( 10k ohm , 5k ohm all 10 turns )
2-change start stop push buttons , control relays , power and control cables from panel to motor and from panel to operator panel
3-change speed reference from pot to push button ( option in drive )
4-change motor :38:
5-last changed the control card on the drive
but this made the 1st problem gone and a new one appear
the drive stop without any fault as if someone press stop push button so we change it but the problem still on
can someone help