![Siemens SINAMICS G120XA Скачать руководство пользователя страница 303](http://html.mh-extra.com/html/siemens/sinamics-g120xa/sinamics-g120xa_operating-instructions-manual_381566303.webp)
6.7
Drive protection
6.7.1
Overcurrent protection
Overview
The U/f control prevents too high a motor current by influencing the output frequency and the
motor voltage (I-max controller).
Precondition
You have selected U/f control.
The application must allow the motor torque to decrease at a lower speed.
Function description
The I-max controller influences the output frequency and the motor voltage.
If the motor current reaches the current limit during acceleration, the I-max controller extends
the acceleration operation.
If the motor load is so high during steady-state operation that the motor current reaches the
current limit, then the I-max controller reduces the speed and the motor voltage until the motor
current returns to the permissible range again.
If the motor current reaches the current limit during deceleration, the I-max controller extends
the deceleration operation.
Parameters
You only have to change the factory settings of the I-max controller if the drive tends to oscillate
when it reaches the current limit or if it is shut down due to overcurrent.
Table 6-66
I-max controller parameters
Number
Name
Factory setting
r0056.0 … 13
CO/BO: Status word, closed-loop control
-
p0305[M]
Rated motor current
0 Arms
p0640[D]
Current limit
0 Arms
p1340[D]
I_max frequency controller proportional gain
0
p1341[D]
I_max frequency controller integral time
0.300 s
r1343
CO: I_max controller frequency output
- rpm
You will find more information about this function in function diagram 6300 and in the parameter
list.
Advanced commissioning
6.7 Drive protection
SINAMICS G120XA converter
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
301
Содержание SINAMICS G120XA
Страница 2: ......
Страница 12: ...Table of contents SINAMICS G120XA converter 10 Operating Instructions 03 2019 FW V1 0 A5E44751205B AB ...
Страница 104: ...Wiring 4 2 Control interfaces SINAMICS G120XA converter 102 Operating Instructions 03 2019 FW V1 0 A5E44751205B AB ...
Страница 916: ...Index SINAMICS G120XA converter 914 Operating Instructions 03 2019 FW V1 0 A5E44751205B AB ...
Страница 917: ......