Siemens SIMOTICS T-1FW6 Series Configuration Manual page 94
Naturally cooled built-in torgue motors for sinamics s120
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Also See for SIMOTICS T-1FW6 Series:
- Configuration manual (560 pages) ,
- Operating instructions manual (138 pages) ,
- Configuration manual (514 pages)
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Configuration
5.4 Mounting
Evaluation
Both motors are suitable for this positioning task. The installation requirements govern which
motor is better suited. During positioning, the motor reaches a torque that far exceeds its
rated torque M
continuous power loss. Provided that positioning only takes a short time and the winding
temperature remains below the shutdown limit, this high load is permissible. Also see
Section "Intermittent duty S3" in Chapter "Specification of the duty cycle".
Periodic duty cycle (S3 mode)
The motor can repeat a drive operation any number of times (e.g. the above described
positioning operation) where M > M
intervals where the windings are in a no-current state between the various load phases. Also
see Section "Intermittent duty S3" in Chapter "Specification of the duty cycle".
The "duty cycle" comprises the load phase and the zero-current (cooling) phase. The cooling
phases are crucial here: As a result of the no-load intervals, the effective torque of the duty
cycle is reduced to the value of the rated torque M
If the future duty cycle is either not known or cannot be estimated, the motor can only be
selected on the basis of the required maximum speed and peak torque. This means that for
the duty cycle, the maximum permissible rms torque M
This results in a very short cooling phase, the length of which must not be undershot.
A significantly simplified load cycle comprising three time segments with lengths Δt
is assumed as example. In these time segments, torques M
these torques can have any value between + M
this load cycle (in Nm) can be calculated using the following formula:
In this case, the cycle duration (Δt
thermal time constant t
The load cycle is permissible, as long as M
92
and the resulting power loss is much greater than the permissible
N
intermittently occurs, if there are sufficiently long
N
+ Δt
1
.
TH
of the motor.
N
of the duty cycle is also defined.
eff
, M
1
and – M
MAX
MAX
+ Δt
) should not be longer than 10 % of the
2
3
≤ M
.
eff
N
Naturally cooled 1FW6 built-in torque motors
Configuration Manual, 07/2017, 6SN1197-0AE01-0BP3
, Δt
1
, M
are generated. Each of
2
3
. The effective torque M
, Δt
2
3
of
eff
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