Siemens SIMOTICS T-1FW6 - Page 158

Technical data and characteristics
6.1 Explanations of the formula abbreviations
1FW6 Built-in torque motors
156 Configuration Manual, 07/2017, 6SN1197-0AE00-0BP9
Boundary conditions
U
DC
Converter DC link voltage (direct voltage value).
Comment: For converter output voltages U
a max
, see Chapter "System integra-
tion".
T
VORL
Maximum intake temperature of the water cooler for the main cooler and prec
i-
s
ion cooler if the motor is to be utilized up to its rated torque M
N
. For details of
the dependency of the continuous motor current on inta
ke temperature of the
water cooler, see the characteristic curve in "Cooling".
T
N
Rated temperature of the motor winding.
Rated data
M
N
Rated torque of the motor.
I
N
Rated motor current at the rated torque M
N
.
n
N
Rated speed where the motor provides rated torque M
N
.
P
V,N
Motor power loss at the rated operating point (M
N
,n
N
) at the rated tempera-
ture T
N
.
Limit data
M
MAX
Maximum motor torque.
I
MAX
Maximum motor current at the maximum torque M
MAX
. Maximum possible load
duration: see "Short-time duty S2".
P
EL,MAX
Electric power drawn by the motor at the (M
MAX
,n
MAX,MMAX
) point at rated tem-
perature T
N
.
Note
The sum of the mechanical power P
mech
output and power loss P
V
yields the electric power
drawn by the motor P
EL
.
Also refer to "Calculating the
required infeed power."
The rated electric power drawn by the motor at the rated operating point
with M = M
N
and
n
= n
N
can be calculated as follows:
P
EL,N
= P
mech,N
+ P
V,N
= 2π ∙ M
N
∙ n
N
+ 3 ∙ R
130
∙ I
0
2
+ P
LV,N
The stator iron losses are taken into
account because instead of I
N
, the higher current I
0
is
used for the calculation. You can read off the rotor power loss P
LV,N
from the "Rotor losses
with respect to speed" characteristic.