×
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

AVR

AVR

(OP)
re alternators:

What does AVR mean ?

RE: AVR

Automatic Voltage Regulator. It's the box of tricks which maintains the terminal voltage of the generator at the demanded value by adjusting the strength of the magnetic field of the rotor. The rotor is an electromagnet and the field is controlled by the current through it.

The AVR measures the terminal voltage and through some form of singal conditioning and amplification it produces a current output. Some AVRs are based on a permanent magnet generator (PMG) to provide the power to the field, others use the main output of the generator for their power. Some have a rectifier on the shaft, some pass DC from the AVR through slip rings. Some use a signal of a few amps to control a pilot exciter and main exciter which in turn feed the generator field, others directly deliver perhaps 6000A directly to to the main generator field. There are a lot of permutations!

In the machine you're considering in your other thread it's a fair bet that it uses a PMG and a rotating rectifier.
  

----------------------------------
  
If we learn from our mistakes I'm getting a great education!
 

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