gefran VDI100 Series Instruction Manual page 263

The following figure an overview of the automatic speed regulator (ASR) block.
V/f + PG control mode:
The ASR function adjusts the output frequency to control the motor speed to minimize the difference between
the frequency reference and actual motor speed.
Frequency
If one of the multi-function input (03-00 to 03-07) is set to 42 (PG is disabled), the input can be used to enable
or disable the speed control loop system (ASR).
SLV control mode:
The ASR function adjusts the output frequency to control the motor speed to minimize the difference between
the frequency reference and actual motor speed.
The ASR controller in SLV mode uses a speed estimator to estimate the motor speed. In order to reduce speed
feedback signal interference, a low-pass filter and speed feedback compensator can be enabled.
The ASR integrator output can be disabled or limited. The ASR output is passed through a low-pass filter.
Frequency
Reference
SV control mode and PMSV mode:
The ASR function adjusts the output frequency to control the motor speed to minimize the difference between
the frequency reference and actual motor speed.
The ASR controller in SLV mode uses a speed estimator to estimate the motor speed. In order to reduce speed
feedback signal interference, a low-pass filter and speed feedback compensator can be enabled.
The ASR integrator output can be disabled or limited. The ASR output is passed through a low-pass filter.
VDI100 • Instruction manual
Figure 4.4.107 ASR block diagram (V/f + PG)
Fref
SFS
Reference
-
+
Speed
20-00
Feedback
20-02
Figure 4.4.108 ASR block diagram (SLV mode)
+
P
-
I
Feedback
LP Filter
Compensator
20-13
20-14
Speed
Observer
Feedback
Observer
ASR Limit
P
+ +
I
20-01
20-03
20-07=1(during accel / decel)
. 20-07= 0 , or
. Speed control integral reset
(03-00 to 03-07= 43)
+
20-00
20-02
+
I Limit
20-01
20-03
Speed
20-17 Speed
20-18 Observer
Motor Voltage
Motor Current
P
+
20-09
20-11
+
Error
I
20-10
20-12
+ Fout Output
Frequency
+
f
20-05
PG valid
PG invalid
20-06
(03-00 to 03-07= 42)
Primary Torque
delay time Limit
20-08
20-07 = 1 (during accel/decel)
20-07 = 0
Speed Control Integral Reset
03-00 to 03-07 = 43
Torque
Reference
263