Help with an H-Bridge

Discussion in 'The Projects Forum' started by dumle29, Feb 10, 2012.

  1. dumle29

    Thread Starter Member

    Jun 26, 2011
    45
    0
    Hi, so me and two of my friends decided, that we should build a electric racer.

    we decided we should use two 500W DC motors, and i, being the circuit guy, started looking into, well the circuits. However, i have never done anything with motors, but i do know, that what ill need is an H-Bridge.

    The specs of the motor:

    • 36V
    • 500W
    • 17,5A

    I though of making an H-Bridge, consisting of 2 P-channel, and 2 N-channel, but then thought, that that would be a hell of a lot of power to run over two mosfets.

    other than that, i dont really know how to choose a mosfet. How much should the rated amps be above what i need? Could i run several mosfets paralell to split the load out and reduce RdsON, or should i go with power BJT?

    The H-Bridge would be controlled by an arduino, the output of the pins on that would be 5v 40 mA (though i wouldn't run the pins at more than 30 mA to be safe)

    so yeah, thanks a lot for taking a look :)
     
  2. Pencil

    Active Member

    Dec 8, 2009
    271
    38
    Look here, if you haven't already seen this.

    LINK

    Parametric searches on supplier websites are always helpful.

    LINK
     
  3. dumle29

    Thread Starter Member

    Jun 26, 2011
    45
    0
    Thanks a bunch, had read that first link before, but couldn't find it. Thanks :)
     
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