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finding the right voltage for a dc motor

Discussion in 'Electronic Basics' started by Normand Fisher, Dec 14, 2005.

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  1. Hi,
    I was given two small dc motors. However, I have no idea if these are 12v
    or 24v or anything else. I was thinking about trying it with 6, then 12
    then 18...but how do I know when to stop? Is there a way to find out
    without risking burning the motors?

    Many thanks
  2. BobG

    BobG Guest

    I'd measure the stall current. The max effciency operation will be the
    voltage that gives half the stall current when operating with a load.
    Max voltage would be twice the operating voltage, to give some headroom.
  3. BobG

    BobG Guest

    I suppose I should add measure the stall current at some low voltage
    that doesnt cause the motor to get too hot. Then the working and max
    voltage mentioned above can be found. Sorry about the confusion. Need
    to be able to go back and edit this stuff somehow.
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