Siemens SIMOTICS S-1FK2 Configuration Manual page 84

Technical data and characteristics
6.1 Explanations
You can find additional information in Chapter "Configuration (Page 65)".
NOTICE
Motor damage due to overheating
Continuous operation in the area above the S1 characteristic results in motor overheating and
subsequent damage.
• Operate the motor within the values of the S1 characteristic.
M
max
The M
M
max inv
The M
maximum converter current. The M
n
max inv
The mechanical variables of the motor and the properties of the converter limit the speed range
of the motor. The n
system with SINAMICS S120.
NOTICE
Damage to the converter due to excessively high speeds
A motor speed higher than n
exceeds the maximum permissible voltage at the converter. This induced voltage can destroy
the converter.
• Operate the motor at speeds below n
Voltage limit characteristic curve
Field weakening starts from the voltage limit characteristic
As the speed increases, an increasing percentage of the current is used for field weakening, and
therefore no longer generates a torque. This is the reason that the M
characteristic have a steep downward gradient in the field weakening range.
Converter output voltages
Every speed-torque diagram includes different characteristics for different converter output
voltages.
SINAMICS S120
3 AC 380 - 480 V
82
characteristic
②
characteristic defines the operating range for transient overloads.
max
characteristic
③
characteristic
max inv
line
line
max inv
Drive system Infeed module
BLM/SLM
BLM/SLM
limits the possible overload range in combination with a specific
characteristic takes field weakening into consideration.
max inv
④
limits the maximum permitted speed of the motor in a drive
can result in a voltage being induced in the winding that
max inv
.
max inv
Line voltage
V
line
ALM 400 V
ALM 480 V
400 V
480 V
⑤
.
characteristic and the S1
max
DC link voltage
V
DC LINK
600 V
720 V
540 V
650 V
1FK2 Synchronous Motors for SINAMICS S120
Configuration Manual, 02/2022, A5E46927724B AD
Output volt‐
age
V
mot
425 V
510 V
380 V
460 V