×
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

Variable frequency transformer
2

Variable frequency transformer

Variable frequency transformer

(OP)
Anyone know of a good source for generalized information on "Variable Frequency Transformers"?

RE: Variable frequency transformer

Never heard of a "Variable Frequency Transformer".  What is it?  Or, are you using the wrong term for something else?  What are you trying to do?

RE: Variable frequency transformer

Could be VFD - variable frequency drive? Never met variable frequency transformers! Google "VFD".

RE: Variable frequency transformer

(OP)
It allows the transfer of power between grids. As far as i know there are two in existance, one in Quebec and one in Texas. I believe they are also building one in NJ.It's described as a "continuously variable phase shifting transformer that can operate at an adjustable phase angle"  

RE: Variable frequency transformer

Hi Blacklabs.
It's two different systems in the Quebec and Texas-Mexico line.
We have thread on the issue.
Quebec it's some rotate system of GE.
Texas-Mexico classical back to back DC power link.
I try found this thread and will attach.
Best Regards.
Slava
 

RE: Variable frequency transformer

I was somewhat involved with one of these projects. There was trouble in the beginning with high magnetic forces trying to tear the thing apart. This required addtional bracing. Also trouble with the drive controling rotation of the windings. Pretty much just a BIG science project....

RE: Variable frequency transformer

I don't agree with you. I had chance talked to the guy who invented the VFT thing it is a big generator like a hydro unit stator side connect to one side and rotor connect to the other side. It is a very talent idea and equipment. the first one HQ put in the the border between Canada and us I guess.go to google and you will find the interesting staffs.

RE: Variable frequency transformer

I am wondering if someone has renamed a rotary phase converter a variable frequency transformer. I think they were commonly used to transfer power between 60 Hz and 25 Hz systems, or to derive 25 Hz  from 60 Hz.

Bill
--------------------
"Why not the best?"
Jimmy Carter

RE: Variable frequency transformer


waross:

We had the same in Germany: Some rotating machinery of this type was built by Siemens Berlin. They were converting 50 Hz three phase power into 16 2/3 Hz single phase power for the German Railway traction grid. The 500 rpm set of 31.25 MVA consisted of a 16 2/3 Hz single phase generator, driven by a 50 Hz three phase asynchronous motor. A slip machine (type Siemens-Lydall) was also mechanically coupled with this converter.

Wolf
www-hydropower-consult.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