Siemens SINAMICS G120XA, Руководство по эксплуатации

Страница: 403 / 918

Description: Sets the excitation build-up time of the motor.
This involves the delay time between enabling the pulses and enabling the ramp-function generator. The induction
motor is magnetized during this time.
CAUTION
If there is insufficient magnetization under load or if the acceleration rate is too high, then an induction motor can stall
(refer to the note).
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.
p0347[0...n] Motor de-excitation time / Mot t_de-excitat
Access level: 3 Calculated: CALC_MOD_REG Data type: FloatingPoint32
Can be changed: T, U Scaling: - Dynamic index: MDS, p0130
Unit group: - Unit selection: - Function diagram: -
Min:
0.000 [s] Max:
20.000 [s] Factory setting:
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).
p0350[0...n] Motor stator resistance cold / Mot R_stator cold
Access level: 3 Calculated: CALC_MOD_EQU Data type: FloatingPoint32
Can be changed: T, U Scaling: - Dynamic index: MDS, p0130
Unit group: - Unit selection: - Function diagram: -
Min:
0.00000 [ohm] Max:
2000.00000 [ohm] Factory setting:
0.00000 [ohm]
Description: Sets the stator resistance of the motor at ambient temperature p0625 (phase value).
Dependency: See also: p0625
NOTICE
When selecting a catalog motor (p0301), this parameter is automatically pre-assigned and is write protected.
Information in p0300 should be carefully observed when removing write protection.
Note
The motor identification routine determines the stator resistance from the total stator resistance minus the cable
resistance (p0352).
Parameters
7.3 Parameters
SINAMICS G120XA converter
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
401