Technical data and characteristics
6.1 Explanations
1FK2 synchronous motors for SINAMICS S120
64 Configuration Manual, 06/2019, A5E46927724B AB
The S1 characteristic ① shows the limits of the permissible temperature range for
continuous operation according to the specified heat class of the motor.
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.
On average, the supplied torque must be below the S1 characteristic. You can find additional
information in section "Configuration (Page 49)".
The M
max
characteristic ② defines the operating range for transient overloads.
The M
max Inv
characteristic ③ limits the possible overload range in combination with a specific
maximum converter current. The M
max Inv
characteristic takes field weakening into
consideration.
The mechanical variables of the motor and the properties of the converter limit the speed
range of the motor. The n
max Inv
line ④ limits the maximum permitted speed of the motor in
the system with SINAMICS S120.
Damage to the converter due to excessively high speeds
A motor speed higher than n
max Inv
can cause voltage that exceeds the maximum
permissible converter voltage in the winding. This induced voltage can destroy the
converter.
• Run the motor at speeds below n
max Inv
.
A Motor Module is recommended in section "Motor overview/Motor Module
assignment/power cables (Page 66)" for each motor in accordance with its stall current. The
maximum torque that can be achieved with this in the short term is shown in the
characteristic M
max Inv
.
● When configuring intermittent or overload operation, check whether a larger Motor
Module is required to provide the necessary peak current.
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