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What are the advantages of vf drives over non vf drives for EOT cranes?

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Question added by amany mokhtar , Volunteer , Resala
Date Posted: 2013/10/24
حسام ناجى
by حسام ناجى , testing and commissioning engineer II , SENDAN INTERNATIONAL COMPANY

1.smooth start and stop.

2.no jerking of load. 3.exact posiitoning 4.better protection for motor. 5.high/low speed selection. 6.reliability of break shoe. 7.programmable break control. 8.easy circutry 9.reduction in controls 10.increases motor life

zubair rehmani
by zubair rehmani , senior technician instrument , pakitan oilfield limited pakistan,pakarab fertilizer

1-motor start and stop with define accerlated and dececlated rate 

2-can control speed directly from controller (PLC ,DCS and etc)

3-motor can operate in both direction with out rewiring.

4-winding temp securities can add.

5-break application

6-motor can control from control room and field both

7-energy saver

8-increase motor life

9-motor can work on different macro

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