Siemens SIMOTICS T-1FW3 - Page 257

Technical data and characteristics
6.3 Data sheets and characteristics
1FW3 complete torque motors
Configuration Manual, 08/2020, A5E46027705B AA
255
Table 6- 51 1FW3281, rated speed 250 rpm
Engineering data
Code
Unit
1FW3281-2☐G
Rated speed
n
N
rpm
250
Rated torque (100 K)
M
N (100 K)
Nm
2450
Rated power (100 K)
P
N (100 K)
kW
64
Rated current (100 K)
I
N (100 K)
A
126
Static torque (100 K)
M
0 (100 K)
Nm
2550
Stall current (100 K)
I
0 (100 K)
A
131
Limiting data
Max. permissible speed (mech.)
n
max mech.
rpm
1000
Max. permissible speed (converter)
n
max Inv
rpm
460
Maximum torque
M
max
Nm
4050
Maximum current
I
max
A
225
Motor data
Number of poles
2p
20
Ratio of speed measurement
(belt-driven encoder)
i
enc
-- -5
Torque constant (100 K)
k
T(100 K)
Nm/A
19.5
Voltage constant (at 20 °C)
k
E
V/1000 rpm
1245
Winding resistance (at 20 °C)
R
ph
Ω
0.104
Rotating field inductance
L
D
mH
4.0
Electrical time constant
T
el
ms
38.0
Thermal time constant
T
th
min
10.0
Mechanical data: Hollow-shaft version
Mechanical time constant
T
mech
ms
3.1
Moment of inertia J
mot
kgm
2
3.8
Shaft torsional stiffness
c
t
Nm/rad
1.32E+08
Weight
m
kg
600
Mechanical data: Solid shaft version
Mechanical time constant
T
mech
ms
2.6
Moment of inertia
J
mot
kgm
2
3.2
Shaft torsional stiffness
c
t
Nm/rad
9.48E+06
Weight
m
kg
750
Mechanical data: Plug-on shaft version
Mechanical time constant
T
mech
ms
3.0
Moment of inertia
J
mot
kgm
2
3.6
Shaft torsional stiffness
c
t
Nm/rad
1.52E+08
Weight
m
kg
670
The specified rated data are valid for a 600 V DC link voltage