×
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

motor's current load monitoring

motor's current load monitoring

motor's current load monitoring

(OP)
I am using a AC brushless servo motor (3 phase 220VAC) and want to monitor the current load using a current sensor.
My question is: Do I have to use a 3 phase current sensor or a single phase one is ok?

Thanks.

RE: motor's current load monitoring

If the motor windings are in good condition the currents are balanced with 120 Deg spacing, then a single phase line current will give you information of the motor current.
If detail analysis including phase angle are required you should monitor each phase.

RE: motor's current load monitoring

(OP)
Hi alalde,

Thank you very much for your reply.

I think a single phase sensor is ok for me because I don't require phase angle and high accurat measurement.

Thanks.

RE: motor's current load monitoring

Is this just for information only or is it to activate some type of motor protection? If it is for information only, then it would be okay. However, if it is for some type of motor protection circuit then use all three.

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