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3.2.4 Control Structure in VVC
plus
Advanced Vector Control
Control structure in VVC
plus
open-loop and closed-loop configurations:
In the configuration shown in the figure above, par. 1-01
Motor Control Principle
is set to “VVC
plus
[1]” and par. 1-00
Configuration Mode
is set to “Speed
open-loop [0]”. The resulting reference from the reference handling system is received and fed through the ramp limitation and speed limitation before
being sent to the motor control. The output of the motor control is then limited by the maximum frequency limit.
If par. 1-00
Configuration Mode
is set to “Speed closed-loop [1]” the resulting reference will be passed from the ramp limitation and speed limitation into
a speed PID control. The Speed PID control parameters are located in the par. group 7-0*. The resulting reference from the speed PID control is sent to
the motor control limited by the frequency limit.
Select “Process [3]” in par. 1-00
Configuration Mode
to use the process PID control for closed-loop control of, e.g., speed or pressure in the controlled
application. The Process PID parameters are located in par. group 7-2* and 7-3*.
3 Introduction to AutomationDrive FC 300
FC 300 Design Guide
3-6
MG.33.BC.22 - VLT
®
is a registered Danfoss trademark
3