Table of Contents
Advertisement
14.10.4.7
Overcurrent protection
Overview
To limit the motor current, when reaching the current limit, the I_max controller reduces the
output frequency and the motor voltage.
Requirement
The U/f control is active.
Description of function
When reaching the current limit, the I_max controller has the following effect on motor
operation:
• When accelerating, the I_max controller extends the acceleration phase.
• When braking, the I_max controller extends the braking phase.
• Steady-state operation:
– For characteristic "U/f control for a drive that requires precise frequency", the I_max
– For all other U/f characteristics, the I_max controller reduces the speed and the motor
Parameters
The following list contains the parameters of the "Overcurrent protection" function.
Number
r0056.0...15
p0305[0...n]
p0640[0...n]
p1340[0...n]
p1341[0...n]
r1343
14.10.5
Speed control
14.10.5.1
Speed control
Overview
Speed control comprises current regulation and higher-level speed control.
SINAMICS G220 converter
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
controller reduces the motor voltage until the motor current returns to the permissible
range.
voltage until the motor current returns to the permissible range.
Name
Status word, closed-loop control
Rated motor current
Motor current limit
I_max frequency controller proportional gain
I_max frequency controller integral time
I_max controller frequency output
Functions
14.10 Closed-loop drive control
Unit
[Arms]
[Arms]
[s]
[rpm]
507
Advertisement
Table of Contents
