×
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

Brushless Exciters

Brushless Exciters

Brushless Exciters

(OP)
Hi, I´m trying to find some information about brushless exciters for synchronous motors, I´m working with a 10 MW synchronous motor, I´d like to know how the brushless exciter works, if any know where I can download some explanation of this, I will be grateful

RE: Brushless Exciters

You have a small permanant magnet generator feeding the field of the main generator.  The magnets are stationary and create the field. The armature windings are on the rotor and due to relative motion an ac voltage is induced in them... that ac voltage is fed through rotor-mounted rectifier diodes to feed the main field windings.

Everything from PMG armature through main generator field windings are rotating => no need for slip rings to transfer current between rotating and stationary parts.

RE: Brushless Exciters

In addition to the scheme described by electricpete, it is fairly common for the PMG to be replaced by a static rectifier controlling the DC field of the exciter.

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