Motor De-Excitation Time / Mot T_De-Excitat; Motor Stator Resistance Cold / Mot R_Stator Cold - Siemens SINAMICS G150 Manual

2 Parameters
2.2 List of parameters
When starting or executing a flying restart for a separately-excited synchronous motor without encoder or with
incremental encoder, then the voltage induced in the stator by the excitation current pulse is used to determine the
rotor position. The length of the ramp is pre-assigned from the motor data for p0346 = 0 s. If it crystallizes out that this
time is too short, then it can be extended by entering a negative value in p0346, whereby otherwise, the excitation
behavior corresponds with that for p0346 = 0 s. For all other motor types, p0346 is internally limited downwards to 0
s.
Note: The parameter is calculated using p0340 = 1, 3.
For induction motors, the result depends on the rotor time constant (r0384). If this time is excessively reduced, this
can result in an inadequate magnetizing of the induction motor. This is the case if the current limit is reached while
building up magnetizing. For induction motors, the parameter cannot be set to 0 s (internal limit: 0.1 * r0384).
For permanent-magnet synchronous motors and vector control, the value depends on the stator time constant
(r0386). Here, it defines the time to establish the current for encoderless operation immediately after the pulses have
been enabled.
The current to excite the induction motor can be limited in p0644.
p0347[0...n]

Motor de-excitation time / Mot t_de-excitat

VECTOR_G Can be changed: C2(3), U, T
Data type: FloatingPoint32
P-Group: Motor
Not for motor type: -
Min
0.000 [s]
Description: Sets the de-magnetizing time (for induction motors) after the inverter pulses have been canceled.
The inverter pulses cannot be switched in (enabled) within this delay time.
Note: The parameter is calculated using p0340 = 1, 3.
For induction motors, the result depends on the rotor time constant (r0384).
if this time is shortened too much, then this can result in an inadequate de-magnetizing of the induction motor and in
an overcurrent condition when the pulses are subsequently enabled (only when the flying restart function is activated
and the motor is rotating).
p0349 System of units motor equivalent circuit diagram data / Unit_sys mot ESB
VECTOR_G Can be changed: C2(3)
Data type: Integer16
P-Group: Motor
Not for motor type: -
Min
1
Description: Sets the actual system of units for motor equivalent circuit diagram data.
Value: 1:
2:
Dependency: The parameter can only be changed in an offline project using the commissioning software.
Refer to: p0304, p0305, p0310
Note: The reference parameter for resistances of the rated motor impedance Z = p0304 / (1.732 * p0305) is in the % units
system.
Inductances are converted into a resistance using the factor 2 * Pi * p0310.
If a reference parameter (p0304, p305, p0310) is zero, then it is not possible to make a changeover to "referred"
values (per unit values).
p0350[0...n]

Motor stator resistance cold / Mot R_stator cold

VECTOR_G Can be changed: C2(3), U, T
Data type: FloatingPoint32
P-Group: Motor
Not for motor type: -
Min
0.00000 [ohm]
Description: Sets the stator resistance of the motor at ambient temperature p0625 (phase value).
134
System of units, physical
System of units referred
Calculated: CALC_MOD_REG
Dyn. index: MDS, p0130
Units group: -
Scaling: -
Max
20.000 [s]
Calculated: -
Dyn. index: -
Units group: -
Scaling: -
Max
2
Calculated: CALC_MOD_EQU
Dyn. index: MDS, p0130
Units group: 16_1
Scaling: -
Max
2000.00000 [ohm]
List Manual (LH2), 04/2014, A5E03263479A
Access level: 3
Func. diagram: -
Unit selection: -
Expert list: 1
Factory setting
0.000 [s]
Access level: 1
Func. diagram: -
Unit selection: -
Expert list: 1
Factory setting
1
Access level: 2
Func. diagram: -
Unit selection: p0349
Expert list: 1
Factory setting
0.00000 [ohm]
SINAMICS G130/G150