×
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 there available an inverter for 13.8 kv motor
2

is there available an inverter for 13.8 kv motor

is there available an inverter for 13.8 kv motor

(OP)
i have a 13.8 kv motor. is there any inverter can supply that MV motor in the market? if not what is maximum MV available?

RE: is there available an inverter for 13.8 kv motor

I don't know the answer.

I know Toshiba offers 4kv inverters.

Presumably a stepup transformer could be used between inverter and motor?  At least I don't know of any problems with that approach other than cost.

=====================================
Eng-tips forums: The best place on the web for engineering discussions.

RE: is there available an inverter for 13.8 kv motor

DriveMaster, what is your motor rating and the application?

Drivesrock

RE: is there available an inverter for 13.8 kv motor

ABB systems group makes inverters in the MW range.  That would include 13.8KV.

I don't know the exact contacts for this equipment but I am certain that the US Drives & Power Products Group in New Berlin WI can help you.

Their number is 800-752-0696.

RE: is there available an inverter for 13.8 kv motor

(OP)
motor is 2.45 MW for fume extraction system

RE: is there available an inverter for 13.8 kv motor

High voltage very high power inverters/converters usually use gate turn off thyristors.

There are all sorts of high voltage systems used with railway traction, some are even ac with regenerative braking.

RE: is there available an inverter for 13.8 kv motor

U.S. Drives in Niagara Falls, N.Y. makes units up to 3500HP, which use step down and step up transformers.  See their white paper on the subject by going to www.usdrivesinc.com.
Regards,

RE: is there available an inverter for 13.8 kv motor

Siemens made 6 units for TCPL at 44MW each and running speed of 5200rpm. These motors start and run like a dream. just like starting an engine revs build slowly and accelerate at an even rate, and rapid through critical speeds. They are synchronous motors

RE: is there available an inverter for 13.8 kv motor

Drivemaster,
The only manufacturer I know of that makes a true 13.8kV drive is Robicon, now a part of Siemens. Robicon 13.8kV drives link The problem is that 2.45MW is somewhat small in that voltage range so you may end up with a larger capacity than necessary with a nameplate that says it is smaller.

As far as I know, all of the others (ABB, Toshiba, GE, Alstom, and even Siemens prior to buying Robicon), do it by using transformers on either side and a lower voltage (4.2-6.6kV) drive, which adds significant losses to the system. That kind of system works, but makes it even more expensive because the output transformer must be specially designed to function in a variable frequency environment.

Also, IMHO you should definately stay away from someone like US Drives who would do it by transforming down to 575V and back up. Do the math. At 2.45MW, the current at 575V is going to be astronomical!

"Our virtues and our failings are inseparable, like force and matter. When they separate, man is no more."   
Nikola Tesla

RE: is there available an inverter for 13.8 kv motor

(OP)
thank you ALL for your help

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