Scott t transformerless?

Discussion in 'The Projects Forum' started by MrMad, Oct 28, 2015.

  1. MrMad

    Thread Starter New Member

    Oct 28, 2015
    3
    0
    As the title says, I would like to know if anyone has built a circuit that would resemble the old 2 phase 90 degree generators. I am trying to reproduce this type of generator, or waveform, for research purposes in my shop. I would like to have something that could produce 120v in the 2 to 5 amp range. The voltage would be stepped down to 24vac and rectified to power an apparatus that uses some 24v coils. The final voltage would be 24vdc at 120hz 90 degrees apart if rectified with a fwbr, if I am correct. I have done some researching and have come up with these options so far:

    Option 1- Use a my shops single phase to power a small 1hp 3 phase motor and make a rotary add a phase. I would then take 2 small transformers and make an actual scott t transformer to connect to the 3 phase output.

    Option 2- Use a stepper motor controller and driver and use the output to drive the coils. This could probably work from what I have read but I am not sure if I could get at least a stepped square wave form from this as I have never worked with one.

    Option 3- some form of transformerless scott t circuit

    The reason for having the 120vac output is to have the option of stepping it down to different voltages if need be. Any ideas would be welcomed. I have some basic knowledge in electronics but I know there are others out there who are more experienced in this field and/or might have done something similar.
     
  2. Lestraveled

    Well-Known Member

    May 19, 2014
    1,957
    1,215
    Do a EBay search for "georator". They are rotary phase/frequency/voltage converters.
     
    Last edited: Oct 28, 2015
  3. MrMad

    Thread Starter New Member

    Oct 28, 2015
    3
    0
    Thanks for the tip. I have searched for this before but have found that there are mostly frequency and 3 phase to single phase converters. Haven't seen or been able to find a 3 phase or single phase to 2 phase georator. 2 phase disappeared many years ago, not too popular anymore.
     
  4. Ramussons

    Active Member

    May 3, 2013
    557
    92
    Do you have a 3 Phase source? May be you can try a Scott Connection setup to get the 2 Phase Supply.
     
  5. MrMad

    Thread Starter New Member

    Oct 28, 2015
    3
    0
    No, but my first option that I posted would be just that.
     
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