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Driving a stepper motor at higher voltages

Discussion in 'Electronic Design' started by eljainc, May 12, 2008.

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  1. eljainc

    eljainc Guest

    Hello,

    I have some low end stepper motors, made by Howard Industries, part
    number 1-19-4203. They are bipolar stepper motors (2 phases, 4 leads).
    The Inductunce is 31mH, and the phase resistance is 25 Ohms. I am not
    sure (can't find the spec for) of the current per phase. I would
    like to run this motor at a higher voltage. Does anyone know what the
    maximum voltage might be? I know it does depend on the current
    ratings. I tentatively have a 1A power supply at 48V. I would not be
    running this motor for long periods of time (short duty cycle). Would
    this be a safe undertaking or is there a way to find the max voltage
    of this motor? I googled and could not find any other specs on this
    motor.

    Thanks
    Mike
     
  2. mike

    mike Guest

    Stepper motors run on CURRENT. Ohm's law defines the steady state
    relationahip
    between current/volts/ohms/power dissipated in the winding.
    Depending on your application, you may be more interested in the inductance.
    When you apply volts, it takes time to ramp (exponential) up the
    current. It's not unusual to use higher voltage with a current limit
    to get speed.

    Depending on your application, you may have more questions than you
    are currently aware of...inductor saturation may impose further limits.
     
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