Technical data and characteristics
4.1 Technical data and characteristics
1PM6/1PM4 Hollow-Shaft Motors for Main Spindle Drives
Configuration Manual, PPMS, 04/2008, 6SN1197-0AD23-0BP0
57
Motor limits
The speed and power of induction motors are limited for thermal and mechanical
1)
reasons.
1)
stress on the shaft end, bearing stress
Limitation
Description
Thermal limiting
The characteristics for continuous duty S1 and intermittent operation
S6-60 %, S6-40 % and S6-25 % describe the permissible power
values for an ambient temperature of up to 40 °C. A winding
temperature rise of approx. 105 K can occur.
Mechanical limiting
The motor must not exceed the mechanical limit speed n
max
.
4.1
Technical data and characteristics
Table 4-1
Explanation of the abbreviations used
Abbreviation
Units
Description
n
N
1/min (rpm)
Rated speed
P
N
kW
Rated power
M
N
Nm
Rated torque
I
N
A
Rated current
U
N
V
Rated voltage
f
N
Hz
Rated frequency
n
2
1/min (rpm)
Speed for field weakening with constant power
n
max
1/min (rpm)
Maximum rotational speed
T
th
min
Thermal time constant
I
μ
A
No-load current
I
max
A
Maximum current