Cascaded torque (outer loop) and current (inner loop) control
Cascaded torque (outer loop) and current (inner loop) control
(OP)
Dear All,
I am wondering if it okay to have cascaded torque and current control loops to control the torque of a system driven by DC motor. The torque control will be the outer loop and has the set torque value and the current is the inner control loop on the DC motor. Is that okay? or it is better to have one control loop only for example the current loop and use the motor characteristics to estimate the system torque. I am looking forward to hear your suggestions
I am wondering if it okay to have cascaded torque and current control loops to control the torque of a system driven by DC motor. The torque control will be the outer loop and has the set torque value and the current is the inner control loop on the DC motor. Is that okay? or it is better to have one control loop only for example the current loop and use the motor characteristics to estimate the system torque. I am looking forward to hear your suggestions
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RE: Cascaded torque (outer loop) and current (inner loop) control
How would you measure the torque?
I would look at this
http://ctms.engin.umich.edu/CTMS/index.php?example...
and this
http://deltamotion.com/peter/Mathcad/Mathcad%20-%2...
What are you really trying to do? The usual example for torque control is controlling the tension on a winding application.
Peter Nachtwey
Delta Computer Systems
http://www.deltamotion.com
http://forum.deltamotion.com/
RE: Cascaded torque (outer loop) and current (inner loop) control
I have torque sensor based on strain gauges. I use it to measure the torque directly. I have a robot and I want to do torque control on its joints