Siemens SIMOTICS T-1FW3 - Page 162

Technical data and characteristics
6.1 Explanations
1FW3 complete torque motors
160 Configuration Manual, 08/2020, A5E46027705B AA
Example of offset of voltage limiting characteristic curve without field weakening
Motor 1FW3201-1❑L
n
N
= 500 rpm
k
E
= 520 V/1000 rpm
U
Mot, new
should be 290 V; in the example, the calculation is made with U
Mot
= 425 V
It first must be checked as to whether the condition U
Mot, new
> U
iN
is fulfilled.
U
iN
= k
E
∙ n
N
/1000; U
iN
= 520 ∙ 500/1000 = 260 V → condition U
Mot, new
> U
iN
is fulfilled.
Enter and connect points P2 and P4. This line is the new voltage limiting characteristic for
U
Mot, new
= 290 V.
Tolerance data
The characteristic data listed in the data sheets are nominal values that are subject to
natural scatter.
Table 6- 3 Tolerance data in the motor list data
Motor list data
Typ. value
Guaranteed value
Stall current
I
0
± 3 %
± 7,5 %
Electrical time constant
T
el
± 5 %
± 10 %
Torque constant
k
T
± 3 %
± 7,5 %
Voltage constant
k
E
± 3 %
± 7,5 %
Winding resistance
R
ph
± 5 %
± 10 %
Moment of inertia
J
mot
± 2 %
± 10 %
Effects of temperature and parameter scatter on the characteristic
The torque-speed characteristics specified in the following chapter relate to the nominal
values at operating temperature.