Current Controller - Siemens SINAMICS S120 Function Manual

5.8

Current controller

Function description
The current controller is pre-assigned based on the electrical motor data, and generally, does
not have to be adapted in operation. When required, you can measure and optimize the current
controller frequency response using the appropriate measuring functions.
Features
Features of the current controller include:
● Current and torque limitation
● Current controller acts as PI controller
● Current controller adaptation is possible
● Closed-loop flux control is possible for an induction motor
Current and torque limitation
The current and torque limitations are preset when the system is commissioned for the first time
and must be adjusted according to the respective application.
Current controller adaptation
The P gain of the current controller can be reduced (depending on the current) by means of
current controller adaptation. Current controller adaptation can be deactivated with the setting
p1402.2 = 0.
Function diagrams (see SINAMICS S120/S150 List Manual)
● 5700
● 5710
● 5714
● 5722
Drive functions
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Servo control - Current control, overview
Servo control - Current setpoint filter 1 ... 4
Servo control - Iq and Id controller
Servo control - Field current / flux specification, flux reduction, flux controller
Servo control
5.8 Current controller
107