1FW3 complete torque motors
Configuration Manual, 08/2020, A5E46027705B AA
155
Technical data and characteristics
6.1 Explanations
Permissible operating range
The permissible operating range is limited by thermal, mechanical, and electromagnetic
boundaries.
Permissible winding temperature range
The temperature rise of the motor is caused by the losses generated in the motor (current-
dependent losses, no-load losses, friction losses). Utilizing the insulation system according
to temperature class 155 (F) has a limiting effect.
Torque characteristics of motor
The maximum permissible torque depends on the permissible winding overtemperature
(100 K) and, in turn, on the mode. To adhere to the temperature limits, the torque must be
reduced as the speed increases, starting from static torque M
0
.
The characteristics are specified for uninterrupted duty S1 (100 K).
Thermal destruction of the motor
The motor can be thermally destroyed if you operate the it continuously in the area above
the S1 characteristic.
• Continuous duty in the area above the S1 characteristic curve is not thermally permitted
for the motor.
The speed range is affected by:
● The maximum permissible speed (mechanical) n
max mech
(centrifugal forces on the rotor,
bearing lifetime), or
● The maximum permissible speed on the converter n
max Inv
(output frequency, voltage
strength of the converter and/or motor)
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