I am preparing to install a half dozen el cheapo Chinese VFDs on a machine.  
Any one have any idea if I need to or should be putting input line filters on 
them?  No mention of anything like this in the Chinglish manual.  If so how do 
you choose what size?  Could I use 1 big one, or will I need a separate one for 
each drive?
How about rectifiers on the output lines?  I'm assuming those are rated by kva.

They are 3ph 220v 3kw drives and spindle motors.

Is it possible to set the speed on all of these using a single analog command 
signal (they will all need to run at the same speed anyway.)

Todd Zuercher
P. Graham Dunn Inc.<http://www.pgrahamdunn.com/index.php>
630 Henry Street
Dalton, Ohio 44618
Phone:  (330)828-2105ext. 2031


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