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Stepper motor rated power?

Discussion in 'Sensors and Actuators' started by eem2am, Aug 26, 2010.

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  1. eem2am


    Aug 3, 2009
    Do you know what is the rated power of this stepper motor?

    It is the 6V, 18.5 Ohms per winding (UBB1/5) type…….

    -the stepper has two windings.

    Am I right in assuming that this stepper motor’s rated power is 2 * V^2/R = 3.89W ?

    If the rated power is indeed this figure of 3.89W, is it ever permissible/adviseable to drive this stepper motor with a power higher than this rated value?

    -If so , then for how long may I drive the stepper motor at a power level which is higher than the motors rated power level?
  2. Resqueline


    Jul 31, 2009
    Your power assumption is correct if the motor is stopped at a half-step. Running in half-step mode it will consume 3W average. I can't say for how long it'll take this though.
    Temporary overpowering tolerance is determined by mass, time, & max allowable temperature. In the ordinary single stepping mode it will consume 2W regardless.
    Single stepping mode only applies power to one coil at a time. Half-stepping applies power to two coils simultaneously in-between the single-step positions.
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