Motor Model Configuration / Motmod Config - Siemens SINAMICS G150 Manual

p1750[0...n]

Motor model configuration / MotMod config

VECTOR_G (n/M) Can be changed: U, T
Data type: Unsigned8
P-Group: Closed-loop control
Not for motor type: REL, FEM
Min
-
Description: Sets the configuration for the motor model.
Bit 0 = 1: Forces open-loop speed-controlled starting (ASM).
Bit 1 = 1: Forces the system to pass through frequency zero, open-loop-controlled (ASM).
Bit 2 = 1: Drive remains in full closed-loop control mode, even at zero frequency (ASM).
Bit 3 = 1: Motor model evaluates the saturation characteristic (ASM).
Bit 4 = 1: Time-controlled change between current and observer models (ASM).
Bit 5 = 1: HF signal injection to estimate the continuous rotor position (PESM).
Bit 6 = 1: If the motor is blocked, sensorless vector control remains speed-controlled (ASM).
For a stalled (blocked) synchronous motor (PEM), the encoderless vector control remains open-loop speed
controlled.
Bit 7 = 1: Use rugged switchover limits to switchover the model between open-loop and closed-loop controlled
operation (ASM).
Bit field: Bit
00
01
02
03
04
05
06
07
Caution: Do not use bit 6 = 1 if the motor can be slowly reversed by the load at the torque limit. Long delay times due to
blocking (p2177 > p1758) can cause the motor to stall. In this case you should de-activate the function or use closed-
loop control throughout the speed range (note the information re bit 2 = 1).
Note: Bit 0 ... 3 only have influence for sensorless vector control, bit 4 only for vector control with encoder. Bit 2 is pre-
assigned depending on p0500.
Re bit 2 = 1:
The sensorless vector control is effective down to zero frequency. A change is not made into the open-loop speed
controlled mode.
This operating mode is possible for passive loads. These include applications where the load itself does not generate
any active torque and therefore only acts reactively to the drive torque of the induction motor.
If bit 2 = 1, then bit 3 is automatically set to 1. Manual de-selection is possible and may be sensible if the saturation
characteristic (p1960) was not measured for third-party motors. Generally, for standard SIEMENS motors, the
already pre-assigned (default value) saturation characteristic is adequate.
When the bit is set, the selection of bits 0 and 1 is ignored.
Re bit 2 = 0:
If the model feedback is deactivated (p1784 = 0), with bit 2 = 0, then bit 3 is also automatically set to 0.
Re bit 5 = 1:
The selection of HF signal injection is only relevant for permanent-magnet synchronous motors (PESM). Therefore,
activation of bit 5 is only possible outside of motor commissioning (p0010 = 0).
In order to achieve user-friendly configuration of the power unit components in the oversampling mode, when
activated for the first time, initially p1810.3 is set, and then an automatic system boot is initiated. This is only possible
if all of the axes connected to the Control Unit are switched off (refer to the setting conditions for p0009); otherwise, it
is not possible to set the bit.
When deactivating p1750.5, p1810.3 remains unchanged and the system does not boot again.
Therefore, to reverse configure the power unit components from the oversampling mode (after manually deselecting
p1750 bit 5) then initially p1810 bit 3 must be manually deleted and then a manual warm restart initiated.
SINAMICS G130/G150
List Manual (LH2), 04/2014, A5E03263479A
Signal name
Controlled start
Controlled through 0 Hz
Closed-loop ctrl oper. down to zero freq. for
passive loads
Motor model Lh_pre = f(PsiEst)
Model changeover
Cl.-loop control mode PESM up to f=0Hz
with HF signal injection
Closed-loop/open-loop controlled (PEM) for
blocked motor
Use rugged changeover limits
Calculated:
CALC_MOD_LIM_REF
Dyn. index: DDS, p0180
Units group: -
Scaling: -
Max
-
1 signal
Yes
Yes
Yes
Yes
Time controlled
Yes
Yes
Yes
2 Parameters
2.2 List of parameters
Access level: 3
Func. diagram: -
Unit selection: -
Expert list: 1
Factory setting
0000 0000 bin
0 signal
No
No
No
No
Freq. controlled
No
No
No
FP
-
-
-
-
-
-
-
-
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