1PH7 induction motors (Machine tools)
Configuration Manual, (APH7W), 04/2009, 6SN1197-0AD72-0BP0
235
A Appendix
A
A.1 A.1 Description of terms
DE
Drive end
Maximum continuous speed n
S1
The maximum permissible speed that is continuously permitted without speed duty cycles.
Maximum current I
max
This is the maximum current (rms phase value) that can briefly flow for dynamic operations
(e.g. when accelerating) without damaging the motor.
Maximum speed n
max
The maximum permissible speed n
max
is determined by mechanical factors. The maximum
speed n
max
must not be exceeded.
CAUTION
If the speed n
max
is exceeded, this can result in damage to the bearings, short-circuit end
rings, press fits etc. It should be ensured that higher speeds are not possible by
appropriately designing the control or by activating the speed monitoring in the drive
system.
The motor may not operate continuously at maximum speed n
max
. Unless a different duty
cycle is specified, the speed must be reduced as stated below:
Duty cycle for a 10-minute cycle
3 min n
max
6 min 2/3 n
max
1 min Standstill
Maximum torque M
max
Torque which is briefly available for dynamic operations (e.g. when accelerating). M
max
= 2 ∙ M
N
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