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Configuring
5.1 Configuring workflow
Short-time duty S2
For short-time duty S2 the load duration is so short that the final thermal state is not reached.
The subsequent zero-current break is so long that the motor practically cools down
completely.
NOTICE
Motor overload
An excessively high load can lead to shutdown, or if the temperature sensors are not
correctly evaluated, then the motor could be destroyed.
• Ensure that the load does not exceed the value I
• Ensure that the temperature sensors are correctly connected and evaluated.
The motor may only be operated for a limited time t < t
The time t
with ν = (I
The thermal time constants, the maximum currents and the rated currents of the motors can
be taken from the data sheets.
The above equation is valid under the precondition that the initial temperature of the motor -
the intake temperature of the water cooling T
sheet.
Significance of the duty cycle
In addition to the frictional torque, you must also take into account the duty cycle when
selecting the motor. The duty cycle contains information regarding the sequence of motion of
the drive axes and the machining forces that occur in the process.
Motional sequence
The motional sequence can be specified as a rotation angle-time diagram, angular velocity-
time diagram, speed-time diagram, or angular acceleration-time diagram. The torques
resulting from the motional sequence (accelerating torque M
to the angular acceleration α and moment of inertia J, and are in opposition to the
acceleration.
Angle-time diagrams and speed-time diagrams can be converted to angular acceleration-
time diagrams α (t) in accordance with the following correlations:
82
can be calculated using the following logarithmic formula:
MAX
/ I
)
and thermal time constants t
2
M
N
specified in the data sheets!
MAX
with a current I
MAX
.
TH
corresponds to what is specified in the data
VORL
) are proportional with respect
a
Configuration Manual, 04/2017, 6SN1197-0AE02-0BP1
< I
≤ I
.
N
M
MAX
1FW68 radial segment motors
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