Siemens SIMOTICS T-1FW3 Configuration Manual page 99

Load duty cycles with constant on period
For load duty cycles with constant on time, specific requirements are placed on the torque
characteristic as a function of the speed
e.g. M = constant, M ~ n
These drives typically operate at a specific operating point. and are dimensioned for a base
load. The base load torque must lie on or below the S1 curve.
In the event of transient overloads (e.g. during acceleration), an overload must be taken into
account. For synchronous motors, the peak torque must lie below the voltage limiting
characteristic.
SINAMICS ALM 400 V line supply (600 V DC link voltage)
M in Nm; n in rpm
AP 1
AP 2
AP 3
Figure 5-2
1FW3 complete torque motors
Configuration Manual, 08/2020, A5E46027705B AA
, M ~ n or P = constant.
2
Operate for e.g. 1 min
Continuous operation (S1) for x h (with water cooling)
Continuous operation (S1) for x h (without water cooling)
Selecting motors for load examples with constant on time 1FW3201-☐E☐
Configuration
5.2 Configuring workflow
97