Velocity Edge GX440 Operations Instructions Page 282

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Setpoint channel and closed-loop control
7.4 Vector speed/torque control with/without encoder
Drive converter cabinet units
282 Operating Instructions, 10/2008, A5E00288214A
7.4.3.3 Reference model
Description
The reference model becomes operative when p1400.3 = 1 and p1400.2 = 0.
The reference model is used to emulate the speed control loop with a P speed controller.
The loop emulation can be set in p1433 to p1435. It becomes effective if p1437 is connected
to the output of the model r1436.
The reference model delays the setpoint-actual value deviation for the integral component of
the speed controller so that settling (stabilizing) operations can be suppressed.
The reference model can also be externally emulated and the external signal entered via
p1437.
-
-
r 1547 [ 0 ]
r 1538
r 1547 [ 1 ] r 1539
SLVC :
VC :
p 1452
p 1442
p 1470
p 1460
p 1472
p 1462
K
p
T
n
K
p
T
n
r 1084
r 0079
T
i
T
i
p 1437 r 1436
r 1515
-
p 1433 p 1435
I
P
p 1434
$FWXDOVSHHGYDOXH
6SHHGVHWSRLQW
5HIHUHQFHPRGHOSUHFRQWURO
5HIHUHQFHPRGHOSUHFRQWURO
3,
6SHHG
FRQWUROOHU
7RUTXH
VHWSRLQW
'URRS
LQMHFWLRQ
Figure 7-12 Reference model
Function diagram
FP 6031 Pre-control balancing reference/acceleration model
Parameters
p1400.3
Reference model speed setpoint I component
p1433
Speed controller reference model natural frequency
p1434
Speed controller reference model damping
p1435
Speed controller reference model dead time
r1436
Speed controller reference model speed setpoint output
p1437
Speed controller reference model I component input
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