Ways to reduce voltage


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  1. #1
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    Default Ways to reduce voltage

    I have 250v incoming to the main transformer of my mill, the output of the transformer is 65v. I need to get this down to about 60v, I am trying to come up with options.

    Probably the easiest would be to buy a 250v to 240v(or somewhere around there) step down transformer, but I don't have the cash to spend.

    Could I wrap a few more turns on the primary side of the transformer?

    What about putting a 5 ohm, 50 watt resistor inline on the secondary side. The max current is 10 amps, and I know the voltage would vary with load (that's probably a bad idea). I should mention this transformer is for stepper power, not control logic.

    Any more thoughts?

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    If you try to make everything idiot proof, someone will just breed a better idiot!


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    Community Moderator Al_The_Man's Avatar
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    Quote Originally Posted by jderou View Post

    Could I wrap a few more turns on the primary side of the transformer?
    That would be 'take a few turns off' to reduce the voltage.
    I assume it is single phase? If so you could use a Buck-Boost transformer on the secondary.
    Resistor, Bad idea.
    Al.

    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.


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    Wouldn't adding turns to the primary be equivalent to taking turns off the secondary?
    It's actually a 3 phase transformer.

    If you try to make everything idiot proof, someone will just breed a better idiot!


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    Community Moderator Al_The_Man's Avatar
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    Yes, Of course your right, the turns/volt ratio would increase, you would have to change all three primaries, or use two buck/boost transformers on two of the secondary phases.
    Al.

    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.


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Ways to reduce voltage

Ways to reduce voltage