Siemens SIMOTICS S-1FK2 Operating Instructions Manual page 52

Mounting and options
3.8 Holding brake
The holding torque M
operation without slip (holding function when motor is at standstill). The data applies for the
state at operating temperature (120 °C).
Dynamic braking torque M
The dynamic braking torque M
an EMERGENCY STOP.
Opening time and closing time
The delay times that occur when switching the brake.
Maximum permissible single switching energy
The maximum permissible single switching energy of an individual EMERGENCY STOP
operation.
After an EMERGENCY STOP with the maximum single operating energy, allow a cooling time of
at least 3 minutes before you operate the motor again.
Total operating energy (service life)
The total switching energy is the sum of the single switching energy (switching energy for each
EMERGENCY STOP procedure). If the total operating energy is exceeded, brakes can no longer
be guaranteed to function correctly.
• Refurbish the motor.
Formula for calculating the operating energy per braking operation
W
BR
W
Br
n
Mot
J
Mot Br
J
load
182.4
The corresponding data is provided in the Configuration Manual
50
is the highest permissible torque for the closed brake in steady-state
4
= (J + J ) • n ² / 182.4
Mot Br load mot
/ J Operating energy per braking operation
/ min Speed at which the brake is engaged
-1
/ kgm Rotor moment of inertia of the motor with brake
2
/ kgm 2 Load moment of inertia of the mounting part on the motor with brake (kgm
Constant for calculating the circular frequency and SI units
1m
is the smallest mean dynamic braking torque that can occur for
1m
SIMOTICS S-1FK2 synchronous motors for SINAMICS S120
Operating Instructions, 02/2022, A5E46089564B AD
2 )