Selection of motor Drive

Discussion in 'The Projects Forum' started by ajitnayak, Jan 21, 2014.

  1. ajitnayak

    Thread Starter Member

    Feb 22, 2013
    Dear all,

    Here i need some simple help for calculating drive selection for dual axis solar tracker.

    I am planning to use worm gear box for dual axis solar tracker. question for drive selection as follows

    1. how gear ratio being calculate for single and dual worm gear box?
    2. relationship between gear ratio and speed?
    3. relationship between gear ratio and torque?
    4. which motor is preferred to run worm gear drive?
    5. calculation for current drawn by motor when coupled with worm gear with/without load?
  2. MaxHeadRoom


    Jul 18, 2013
    1: Either use manuf ratio or turn input shaft and record output turns.
    2: RPM is reduced by the ratio of the reduction
    3: Torque is increased by the ratio of the reduction, (motor to load inertia ratio is reduced by the square of the reduction)..
    4: Depends on preferred motor technology, Stepper motor, brushed DC, BLDC will all perform this application.
    5: The load and unload torque requirements of the load have to be known, this will also be dependent on the required accel/decel of the motor.
    There are free sizing programs that can assist in getting an idea for motor sizing with Pgms such as offered by Kollmorgen site.