16th March 2009, 04:15 #1
Junior Member level 2
motor current control
may i know the advantages and disadvantages of a dc motor with an outer speed control loop and an inner current control loop?
any information link available? I need it to complete my report.
thanks a lot!!
16th March 2009, 04:15
16th March 2009, 20:16 #2
Full Member level 5
Re: speed control of DC motor with inner current control loo
Torque has a close relationship to current, so the inner loop regulates the torque. The setpoint for the torque is derived from the speed controller. So the speed controller asks for a torque needed to maintain a certain speed.
Dividing the control loop in stages like this has the advantage that every loop can be optimised on its own (if the inner loop has a much bigger bandwidth than the outer loop). It should be easier to create a stable system.
16th March 2009, 20:16
16th March 2009, 23:11 #3
Member level 1
speed control of DC motor with inner current control loop
I want to ask svhb about what is the effect of the bandwidth on the system because I don't know about the subject of the bandwidth
if there is any book that talk about this subject please tell me about it.