Maximum torque drive

Discussion in 'The Projects Forum' started by cpleng7, Sep 21, 2010.

  1. cpleng7

    Thread Starter Active Member

    Dec 18, 2008
    120
    0
    How to design a driver that can drive the high torque with less current consumption on the induction motor.
     
  2. Kermit2

    AAC Fanatic!

    Feb 5, 2010
    3,779
    932
    Induction motor torque is DIRECTLY related to the rotor winding resistance. Variable resistance devices are often used to enable induction motors to generate 100% or more of their rated torque at very low to near zero speed.

    The web is full of information on these motors and their drive circuitry.


    This one for example
     
  3. retched

    AAC Fanatic!

    Dec 5, 2009
    5,201
    312
    Yeah.. If you could produce more torque with less current, that would be a revoloution ;)

    Remember you still have to use the same amount of wattage to get the same amount of work done. The more torque, the faster it gets done.

    You could use lower current over a longer period by using a higher RPM motor and gearing it to get the torque you require. This will still use the same number of electrons but it will allow you to do so over a longer period. This allows for smaller gauge wires and smaller motor overall, but an increase in amount of time to complete the task.
     
  4. Papabravo

    Expert

    Feb 24, 2006
    10,137
    1,786
    If you look at the speed-torque curves for a motor the obvious thing is that the faster the shaft turns the less torque there is that can be delivered to the load. There are two implications to this situation:

    1. Maximum torque is available at near zero angular velocity.
    2. Maximum angular velocity occurs at minimum torque.
    Unless you discover some "new" physics, as my friends in high-energy used to say, this is the way of the motor world.
     
  5. GetDeviceInfo

    Senior Member

    Jun 7, 2009
    1,571
    230
    The motor is what converts current into torque, at some efficiency, not the drivers supplying the current.
     
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