3 phase to 1 phase

Discussion in 'The Projects Forum' started by abh, Dec 31, 2009.

  1. abh

    Thread Starter New Member

    Dec 31, 2009
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    The methodology sounds iffy:
    The quoted material is from the abstract.

    The combination of three phases 120 deg apart into one phase sounds extremely difficult.
  3. gerty

    AAC Fanatic!

    Aug 30, 2007
    What voltage are you trying to end up with? If all you want is 240 single phase just leave out one phase. If the generator is wired for a wye output that means you should have a neutral and that will give you 120v.
    If you're looking to get some other voltage, let us know and we can help.
    Your link didn't work for me, in case your answer was in there.
  4. djb

    Active Member

    May 17, 2008
    if i understand what you mean,

    you have to take each phase "L" with the neutral "N" to have 1 phase power.
    try to connect your load as much symmetric you can on each phase.
    L1-N , L2-N , L3-N. with this way you have 1 phase power from 3 phase transformer.

    if you have any 3 phase loads or equipment, such as motors or big ovens, then you have to use the 3 phases and the neutral.
  5. JDT

    Well-Known Member

    Feb 12, 2009
    Not correct. The voltage across two phases is 1.732 (root 3) times the voltage of each phase.

    So if I have a generator that gives 3 phases each 230V from Phase to Neutral (the star point), the voltage between two phases will be 400V (398.37 to be exact).

    Using two phases is probably the best way to get a single phase supply. But will only be able to use 2/3 of the generators capacity.
  6. gerty

    AAC Fanatic!

    Aug 30, 2007
    Since the OP hasn't returned all we have to go by is his first post which says his generator is 240v. We don't know if it's star or delta, we don't know what voltage he wants to end up with.