Jump to content


Inverter Duty Transformer

  • Please log in to reply
3 replies to this topic

#1 chaterpilar



  • Full Member
  • PipPipPipPip
  • 171 posts

Posted 08 March 2008 - 11:15 AM

Hi !!,

We have a project to make a VFD based panel for a 2080 volts 60hz 250 hp submersible pump ( 300 metres deep).

The vendor is proposing a 380 volts VFD of rated capacity and a inverter duty Autotransformer to stepup the output of drive to 2080 volts.

I find it a bit odd, to put a stepup Auto-transformer in between the drive and the motor.

I recommended a 2080 volts rated VSd and to put the transformer on the line side.

The available supply is 380 volts 60 hz.

Is it Ok to put a Auto-transformer at the output of drive?

Any thoughts?

#2 marke


    Posting Freak

  • Moderator
  • PipPipPipPipPipPip
  • 2,639 posts
  • Gender:Male
  • Location:Christchurch, New Zealand

Posted 08 March 2008 - 06:49 PM

Hello Chaterpilar

Yes, a motor is just a rotating transformer and this is done frequently.
The only issue is if the drive was a sensorless vector, it may get confused. You are best to operate in V/F mode.
I would work on the suppliers recommendations to ensure that there are no incompatibility issues.

Best regards,

#3 chaterpilar



  • Full Member
  • PipPipPipPip
  • 171 posts

Posted 09 March 2008 - 03:18 AM

Thanks Marke for your input. wink.gif

#4 spkam


    Junior Member

  • Full Member
  • PipPip
  • 7 posts

Posted 21 March 2008 - 06:42 AM

If at all you decide to install a transformer , Take care of its K rating for sufficient harmonics withstand capablity.


0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users