Connect with us

Single phase to three phase motor

Discussion in 'Sensors and Actuators' started by pidja105, Dec 7, 2015.

  1. pidja105

    pidja105

    106
    1
    Oct 16, 2015
    Hello,
    I have one single phase motor about 3kW, and how I can wire that motor inside to turn it to three phase delta or wye without rewinding?
     
  2. dorke

    dorke

    2,342
    664
    Jun 20, 2015
    Very simple,
    you can't !
     
    hevans1944, Harald Kapp and duke37 like this.
  3. Minder

    Minder

    2,834
    586
    Apr 24, 2015
    That's about a 4hp motor, any reason for wanting the 3ph conversion?
    M.
     
  4. pidja105

    pidja105

    106
    1
    Oct 16, 2015
    I will test many things.
     
  5. CDRIVE

    CDRIVE Hauling 10' pipe on a Trek Shift3

    4,960
    648
    May 8, 2012
    I'm surprised. Usually AC motors => 4HP are commonly 3PH because the start current on a 1PH motor becomes a breaker tripping extreme.

    Chris
     
  6. Tha fios agaibh

    Tha fios agaibh

    1,906
    600
    Aug 11, 2014
    It's not uncommon to have single phase motors up to 10HP.
     
    Martaine2005 likes this.
  7. Martaine2005

    Martaine2005

    2,394
    630
    May 12, 2015
    I have a 5.5hp and 7hp compressors, both single phase 230V.
    One is a single cylinder and the other is a twin. Both have 200ltr tanks.
    Noisy as hell when filling but nice units!..

    Martin
     
  8. Tha fios agaibh

    Tha fios agaibh

    1,906
    600
    Aug 11, 2014
    Some products have misleading marketing that claims a higher HP to make it sound better.
    Read the small print and you may find it's actually "peak horse power developed" not true HP.
    So your 7HP compressor may be driven with a 2HP motor.
     
    Martaine2005 likes this.
  9. Minder

    Minder

    2,834
    586
    Apr 24, 2015
    Do they show FLA (full load amps) on the plate?
    M.
     
  10. Martaine2005

    Martaine2005

    2,394
    630
    May 12, 2015
    To be honest, I have never read the small print..Nor ever really understood CFM! But another day!
    I do have a 3hp with a 100ltr tank in my old bedroom, 2 metres away! and the motor is a lot smaller than my others..Again, doesn't mean much!

    EDIT: Sorry Minder, they are in my garage and not accessible at the moment.

    I am pretty sure that I have quoted the large 'in your face' plates.
    I am probably wrong though!

    Martin
     
  11. Tha fios agaibh

    Tha fios agaibh

    1,906
    600
    Aug 11, 2014
    CFM is to Air as Amp Hours is to electricity?
     
  12. Martaine2005

    Martaine2005

    2,394
    630
    May 12, 2015
    Interesting!!!!!



    Last updated: September, 2014

    Air compressors for the home or small shop have been advertised and sold with ridiculously inflated horsepower ratings. In 2004, the US government said it would enforce more honest ratings (see the end of this essay), but after a few years the nonsense returned to the marketplace and continues today. The specs and stickers on the unit likely do not tell the truth, and add confusion instead of critical information to buying decisions. But you do not need a testing laboratory to calculate true horsepower or CFM delivered. I will explain below how to estimate these ratings from pressure readings and elapsed time measurements.
     
  13. Martaine2005

    Martaine2005

    2,394
    630
    May 12, 2015
    Very interesting read...But I am eating dinner too....

    I think I have 4 weeners! with big bellies!!

    Martin
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-