×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Is an AC line Filter necessary for a servo drive.

Is an AC line Filter necessary for a servo drive.

Is an AC line Filter necessary for a servo drive.

(OP)
When is a AC line filter needed or not needed?  The motor is a 5 Amp 480 V servo motor on an 11Amp servo drive.  There will be about 50 feet of cable between the drive an motor.  The servo will be making about 1 or 2 trapezoidal moves per min.  We have lots of servos, and non of them have line filters on them, or if they do they are part of the drive hardware.  This one is an Allen Bradley, and our distributor recommended them as a part of a complete package, but I wanted to know what they are for, and if we need them.   

RE: Is an AC line Filter necessary for a servo drive.

Your question is vague. Is this a filter on the input of the drive or the output on the way to the motor.

In all cases filters reduce efficiency and cost money.

A supplier will always suggest them as they can head off operational issues.

If they plant isn't using them and has no issues I probably wouldn't add one. I might note that they could be a possible requirement, and they cost about x$, for the user.  So if you need one it isn't an out-of-the-blue surprise to the user's bottom line.

If you mean on the input then this is to prevent/reduce EMI from heading back out into the power wiring and causing problems with other plant equipment.

If you are talking on the line to the motor then they can extend the life of the motor by carving off the sharp electrical spikes that ultimately challenge the winding insulation.  If one is foolish and runs the output lines near other plant wiring, an output filter can help with that too.

Keith Cress
kcress - http://www.flaminsystems.com

RE: Is an AC line Filter necessary for a servo drive.

(OP)
itsmoked,

Thanks for your comments.  It is a before the drive device.  Here is the info from AB...
2090-UXLF-HV323 1 AC LINE FILTER,ULTRA,23 AMPS, 460V, 3 PHASE.  $329.00

The device is suppose to prevent electrical noise from the drive entering the rest of the system.



 

RE: Is an AC line Filter necessary for a servo drive.

Yeah, that's a cover their butts suggestion probably.
Like I say - it might  be needed.  If some sensor starts acting up, or the other drives start hunting, or the cows all stop giving milk, it may still be needed.

BTW Thanks for coming back on that. thumbsup2      

Keith Cress
kcress - http://www.flaminsystems.com

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources