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Appendix
A.1
Description of terms
Maximum continuous speed n
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
speed n
If the speed n
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.
Maximum torque M
max
Torque which is briefly available for dynamic operations (e.g. when accelerating).
M
max
Modes
The operating modes (duty types) are defined in IEC 60034, Part 1. The maximum duty
cycle duration for duty types S1 and S6 is 10 minutes unless otherwise specified.
No-load current I
μ
This is the current (rms phase current) that is required in order to operate the motor under
no-load conditions at rated speed without load torque. The no-load current defines the motor
magnetization in the base speed range (low speed at the start of field weakening).
1PM6/1PM4 Hollow-Shaft Motors for Main Spindle Drives
Configuration Manual, PPMS, 04/2008, 6SN1197-0AD23-0BP0
S1
must not be exceeded.
max
CAUTION
is exceeded, then this can result in damage to the bearings, short-circuit
max
= 2 ∙ M
N
is determined by mechanical factors. The maximum
max
A
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