Siemens SIMOTICS S-1FT2 User Manual

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F
,
,
W
W
W
I Current
t Time
t
0
Opening time
t
c1
Closing time
A Brake opened
Figure4-2 Terminology (time) for holding operation
Holding torque M
4
The holding torque M
4
is the highest permissible torque for the closed brake in steady-state
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
1m
The dynamic braking torque M
1m
is the smallest mean dynamic braking torque that can occur
for an EMERGENCY STOP.
Opening time and closing time
The delay times that occur when switching the brake.
Maximum permissible single operating energy
The maximum permissible single operating 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 operating energy (operating 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
=(J
Mot Br
+J
load
)•n
mot
²/182.4
W
Br
/ J Operating energy per braking operation
n
Mot
/ min
-1
Speed at which the brake is engaged
J
Mot Br
/ kgm
2
Rotor moment of inertia of the motor with brake
Mounting and options
4.6Holding brake
SIMOTICS S-1FT2 synchronous motors for SINAMICS S120
Operating Instructions, 12/2023, A5E50610821B AF 53

Siemens SIMOTICS S-1FT2 Specifications

General

Brand	Siemens
Model	SIMOTICS S-1FT2
Category	Engine
Language	English