Powering a 24 volt motor at 36 volts

Discussion in 'Electric Bicycles' started by rocket100, Dec 10, 2010.

  1. rocket100

    rocket100 New Member

    So I have a iZip 500. The motor is 28 amps at 24 volts. There is two 12 volt batteries in series each 10 amps for a total of 20 amps at 24 volts. So far I've taken the motor controller out so that it is just a simple full on or off. My questions is, would the motor burn out if I added a third battery in, making it 36 volts at 30 amps?

  2. rocket100

    rocket100 New Member

    Actually it would be 10 amps and 36 volts because it's in series. Right?
  3. ibdennyak

    ibdennyak Guest

  4. rocket100

    rocket100 New Member

    Well I went ahead and added the extra battery. It is working fantastic! The speed is amazing maybe 20 MPH! There is one weird thing though, the motor doesn't get as hot as it did before the extra battery, it only gets warm now. Anybody know what's up with that???
  5. sangesf

    sangesf New Member

    Wattage is wattage..
    Have no clue why it would be cooler.
    If your pulling 20a at 24v (480w) and 13 1/3a at 36v (480w) it's the same.
    UNLESS the controller (and motor) is more efficient at 36v and only pulling 10a (360w).
    If you have an inline meter and can check the amp pull at the different voltages, that would help in the answering of your question.

    For my bike...
    If I use 36v I pull 25a, if I bump up to 48v, it will pull 50a.
    But that's my controller doing that.