14.4 Control Structure in Flux Sensorless
+
_
+
_
130BA053.11
Ref.
Config. mode
P 1-00
P 7-20 Process feedback
1 source
P 7-22 Process feedback
2 source
Process
PID
P 4-11 Motor speed
low limit [RPM]
P 4-12 Motor speed
low limit [Hz]
P 4-14 Motor speed
high limit [Hz]
P 4-13 Motor speed
high limit [RPM]
Low
High
Ramp
P 3-**
+f max.
P 4-19
Max. output
freq.
Motor
controller
-f max.
Speed
PID
P 7-0*
Illustration 14.3 Control Structure in Flux Sensorless Open-Loop and Closed-Loop Configurations
In
,
parameter 1-01 Motor Control Principle
is set to
[2] Flux Sensorless
and
parameter 1-00 Configuration Mode
is
set to
[0] Speed open loop
. The resulting reference from the reference handling system is fed through the ramp and speed
limitations as determined by the parameter settings indicated.
An estimated speed feedback is generated to the speed PID to control the output frequency. The speed PID must be set
with its P,I, and D parameters (
parameter group 7-0* Speed PID Ctrl
).
To use the process PID control for control of speed or pressure in the controlled application, for example, select
[3] Process
in
parameter 1-00 Configuration Mode
. The process PID parameters are found in
parameter group 7-2* Process Ctrl. Feedback
and
parameter group 7-3* Process PID Ctrl.
14.5 Control Structure in Flux with Motor Feedback
130BA054.11
P 3-**
P 7-0*
P 7-2*
+
_
+
_
P 7-20 Process feedback
1 source
P 7-22 Process feedback
2 source
P 4-11 Motor speed
low limit (RPM)
P 4-12 Motor speed
low limit (Hz)
P 4-13 Motor speed
high limit (RPM)
P 4-14 Motor speed
high limit (Hz)
High
Low
Ref.
Process
PID
Speed
PID
Ramp
P 7-00
PID source
Motor
controller
-f max.
+f max.
P 4-19
Max. output
freq.
P 1-00
Config. mode
P 1-00
Config. mode
Torque
Illustration 14.4 Control Structure in Flux with Motor Feedback Configuration (only Available in VLT
®
AutomationDrive FC 302)
Controls
VLT
®
Parallel Drive Modules
132
Danfoss A/S © 6/2016 All rights reserved.
MG37N102
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