Siemens SIMOTICS T-1FW3, Configuration Manual

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Configuration
5.3 Braking resistors (armature short-circuit braking)
1FW3 complete torque motors
106
Configuration Manual, 08/2020, A5E46027705B AA
5.3.2 Dimensioning of braking resistors
The correct dimensioning ensures an optimum braking time. The braking torques which are
obtained are also listed in the tables. The data applies for braking from the rated speed. If
the motor brakes from another speed, then the braking time cannot be linearly reduced.
However, longer braking times cannot occur if the speed at the start of braking is less than
the rated speed.
The data in the following table is calculated for rated values according to the data sheet. The
variance during production as well as iron saturation have not been taken into account here.
Higher currents and torques can occur than those calculated as a result of the saturation.
The ratings of the resistors must match the particular I
2
t load capability.
Dynamic braking
Table 5- 2 Dynamic braking 1FW3, SH 150 Standard
Motor type External
braking
resistor
R
opt
[ Ω ]
Average braking torque
M
br av
[Nm]
Max.
braking torque
M
br max
[Nm]
rms braking current
I
br rms
[A]
without external
braking resistor
with external
braking resistor
without external
braking resistor
with external
braking resistor
Standard
1FW3150-1
☐ H 11 21.5 32.5 40.5 5.3 4.75
1FW3150-1 ☐ L 8.3 17.8 34.5 42.5 8.6 7.7
1FW3150-1 ☐ P 5.5 14.8 35.5 44.0 13.5 12.1
1FW3152-1 ☐ H 5.0 46.5 75 93 12.2 11.0
1FW3152-1 ☐ L 3.7 37.5 80 99 20.0 17.9
1FW3152-1 ☐ P 2.4 32.0 85 105 32.0 28.5
1FW3154-1 ☐ H 3.3 73 122 151 19.3 17.3
1FW3154-1 ☐ L 2.4 60 130 161 32.0 28.5
1FW3154-1 ☐ P 1.6 50 137 170 51.0 45.0
1FW3155-1 ☐ H 2.3 97 164 205 27.0 24.0
1FW3155-1 ☐ L 1.7 77 173 215 43.5 39.0
1FW3155-1 ☐ P 1.1 66 188 235 71 64.0
1FW3156-1 ☐ H 2.0 119 205 255 32.5 29.5
1FW3156-1 ☐ L 1.4 96 215 270 54 48.0
1FW3156-1 ☐ P 0.97 84 240 295 85 76.0