3.2.3 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*
Figure 3.5 Control Structure in Flux Sensorless Open-loop and Closed-loop Configurations
In
1-01 Motor Control Principle
is set to
[2] Flux sensorless
and
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 closed-loop control of speed or pressure in the controlled application, for example, select
[3] Process
in
1-00 Configuration Mode
. The Process PID parameters are found in parameter group
7-2* Process Ctrl. Feedback
and
7-3* Process PID Ctrl.
3.2.4 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
Figure 3.6 Control Structure in Flux with Motor Feedback Configuration (Only Available in FC 302)
Product Introduction
Design Guide
MG34S222
Danfoss A/S © Rev. 2014-02-10 All rights reserved.
27
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3
Summary of Contents for VLT AutomationDrive FC 300
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