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IndustryArena Forum > CNC Electronics > CNC Machine Related Electronics > 24v 10A MPJA transformer winding question
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  1. #1
    Join Date
    Nov 2006
    Posts
    10

    24v 10A MPJA transformer winding question

    I bought the 24v 10A transformer that MPJA offers. Unfortunately the label on top has me confused about the windings and consequently how I should hook this up to 120v to get 24v out.

    Should I hook the primaries up in parallel (reds together and blacks together) or in series (red input, red and black connected together, black input)? What about the secondaries?

    I've attached a picture of the winding diagram and the primary and secondary leads.

    Thanks for any help.
    Attached Thumbnails Attached Thumbnails mpja_x-former.jpg  

  2. #2
    Join Date
    Aug 2006
    Posts
    2758
    Primaries in parallel, Red-Red and Black-Black, secondaries output from Blue to Blue (24 Volt), leave the Yellow wire open

  3. #3
    Join Date
    Aug 2004
    Posts
    2849
    Is that what you want 24VAC??

  4. #4
    Join Date
    Jul 2005
    Posts
    76
    Kreutz is correct.

    Funny you should show this, I just set up a PS with this transformer a week or two ago. I got the cap from Digikey, and the H-bridge from EBay, I get 37V when all is said and done.

  5. #5
    Join Date
    Aug 2004
    Posts
    2849
    24VAC X 1.414 = 33.96 VAC....without a load 37 VDC should be expected....all the voltages are specified at a particular load. By H-bridge....are you talking about a full wave bridge rectifier?

  6. #6
    Join Date
    Jul 2005
    Posts
    76
    Right - too much CNC - got confused there.

  7. #7
    Join Date
    Nov 2006
    Posts
    10
    Quote Originally Posted by ViperTX View Post
    Is that what you want 24VAC??
    From the transformer, yes. I understand that this will change after it's changed to DC, but I'm expecting that.

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