ID
Index Name
Unit Description
434
3
Decoup
%
Scale decoupling
434
4
StatFF
%
Scale static voltage feed-forward
434
5
DynFF
%
Scale dynamic voltage feed-forward
434
6
FilterFF
ms
Filter voltage feed-forward
471
0
MOT_Lsig
mH
Motor leakage inductance (ASM) / stator
inductance (PSM)
472
MOT_LsigDiff
q-axis stator inductance variation (relative to
MOT_Lsig)
472
0
Lsig_q@I0
%
Inductance @ CurrentI0
472
1
Lsig_q@I1
%
Inductance @ CurrentI1
472
2
Lsig_q@I2
%
Inductance @ CurrentI2
472
3
Lsig_q@I3
%
Inductance @ CurrentI3
472
4
CurrentI0
%
Current I0 relative to MOT_CNom
472
5
CurrentI1
%
Current I1 relative to MOT_CNom
472
6
CurrentI2
%
Current I2 relative to MOT_CNom
472
7
CurrentI3
%
Current I3 relative to MOT_CNom
1976
0
CON_CCON_VFF
Select current control / limitation mode
Table 7.11: Parameter - Enhanced feed forward control (continue)
MOOG
ID No.: CB40859-001 Date: 11/2020
MSD Servo Drive - Device Help
130
7 Control
P 434[6] FilterFF
P 434[3] decoup
d/dt
isqref
isdref
isd
—
—
isq
Pi-Regler
Kp,Tn, LsigDiff(isq)
-
ω
* Lsig*LsigDiff(isq)
Lsig*LsigDiff(isq)
Error-Voltage-Model
ω
* Lsig*LsigDiff(isq) +
ω
*
Ψ
Pi-Regler
Kp,Tn, LsigDiff(isq)
P 434[3] decoup
P 434[4] StatFF
P 434[5] DynFF
d,q -> abc T
ransformation, PWM, Motor
Image 7.19: Extended pre-control structure
Image 7.19: Extended pre-control structure shows the extended pre-control
structure. This is activated with P 1976 = ON. This delays the current setpoint by one
controller cycle; this is not suitable for high-performance speed control.
The feed forward control of the voltage drop across the stator resistance of the
machine depends on P 470 MOT_Rstat. The feed forward control of the fault voltage
of the power stage depends on P 302 CON_SwitchFreq. Both can be subjected to
feed forward control and scaled with P 434.4.
The voltage to change the current over the stator inductance depends on P 471
MOT_Lsig. The feed forward control can be scaled with P 434.5.
P 434.6 enables filtering of the voltage thus set, which reduces noise. Do not set this
filter too high, otherwise there will no longer be an increase in bandwidth.