Terminology
..... 6 cst drives, ..... head drive pulley and tripper drive pulley, ....
Please clarify 'cst' and 'tripper drive pulley'. Thanks. ■
More Input Is More Light ( & More Worth To The Answer)
Originally Posted by john zhu
now we are comissioning 5km conveyor with 6 cst drives, we had a problem of overcurrent of drive motors, someone said that the reason is because of differ DIA of head drive pulley and tripper drive pulley, is that resonalbe? anyone had ever been meet same problems? or how to fix this problem? thanks a lot of your comments!
Dear Mr. Zhu,
Generally, whether Controlled Start Transmission drive or not, drives have to meet the actual power requirements. Those might be higher than presumed at commissioning, when the belt is still new and has not (been) walked through some hours of operation. Does the overcurrent endanger the E-system or is it rather feeble?
Reason 1 = insufficient power rating
Reason 2 = unforeseen resistances (as in roller resistance, transfer point sealings, breakaway forces in bearings etc.)
Reason 3 = incorrect belt takeup (--> belt sag)
t. b. continued.
But then, pls. see, it would be a great step if you could explain yourself on an engineering level, as some general sketch of the system + some general information about conveyor layout, bulk material, drive ratings, perhaps the drive current readouts: something to feed on.
However, if you mean tripper as in tripper car (which moves along the conveyor), then pls. explain in more detail your assumptions or if you truly mean a driven pulley on that tripper car.
Looking forward to your answer, with Regards
R. ■
Re: Drive Motor Overcurrent
The paper posted here may be of interest:
https://forum.bulk-online.com/archiv...p/t-24499.html
Regards,
Lyle ■
Understanding Conveyor Physics
Different drive pulley diameters operate at differenct RPM. Motors operate at a more-or-less fixed RPM on the CST. How do you make up the difference?
1. Match the pulley diameters
2. Slip one drive vs. the other with a CST algorithm - can create big energy loss in CST and may result in big power cost to operate such a configuration
3. Hire an expert that knows how to do it. ■
Drive Motor Overcurrent
You have 6 CST drives on the same conveyor. If they are equal they should share the load equally, if they are not equal they should share the load proportionately according to their power rating. There ar some exceptions to this, as in the case of smart booster drives during loading on and trailing off cases. In such cases your control system must still ensure that no drive is overloaded for any appreciable time.
You should conduct a power monitoring program to confirm that the drives are sharing the load as intended.
Joe Dos Santos ■
Drive Motor Overcurrent
dear expert:
now we are comissioning 5km conveyor with 6 cst drives, we had a problem of overcurrent of drive motors, someone said that the reason is because of differ DIA of head drive pulley and tripper drive pulley, is that resonalbe? anyone had ever been meet same problems? or how to fix this problem? thanks a lot of your comments! ■