Difference between revisions of "Control modes"

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(Created page with "Three main control modes in motion & motor control are torque, velocity and position control. ==Torque control== Torque control mode makes motor a torque or force transducer. ...")
 
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;Typical applications  
 
;Typical applications  
*Automatic tightening of screws
+
*Screw tightening robot
 +
*Racing/flight simulators
 
*Feeding/pulling
 
*Feeding/pulling
 
*Cascaded controller after velocity or position controller
 
*Cascaded controller after velocity or position controller

Revision as of 20:55, 18 April 2012

Three main control modes in motion & motor control are torque, velocity and position control.

Torque control

Torque control mode makes motor a torque or force transducer. I.e. user sets torque reference to 1 Nm, then motor will produce 1 Nm torque regardless of spinning speed.

Typical applications
  • Screw tightening robot
  • Racing/flight simulators
  • Feeding/pulling
  • Cascaded controller after velocity or position controller
  • Non-motion applications: high current LED & Peltier driver when drive used just as adjustable current source

Velocity control

Goal of velocity control is to regulate motor speed. I.e. if user velocity reference is 500 rpm, then motor attempts to rotate exactly at 500 rpm no matter how much load is attached to motor.

Typical applications
  • Spindles
  • Feeding
  • Fans & pumps
  • Position control when used with external or internal position controller

Position control

Position control mode attempts to provide precision positioning. Motor follows reference set point and if set point is kept constant, motor holds position even if external forces attempt to displace it.

Typical applications
  • CNC
  • Pick & place machines
  • 2D/3D printing
  • Robotics