SIEMENS
11/19
Siemens MD 50.1 · 2015
Motor options
Mounted components
Brake
11
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Overview
SIMOGEAR geared motors can be supplied with fail-safe spring-
operated disk brakes in order to reduce the motor run-on time
or to hold loads, for example.
Our MODULOG modular system can be used to assign/mount
several brake sizes to one motor size. This chapter specifies the
assignment to the motor sizes and possible brake options.
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Design and principle of operation
Single-disk, spring-operated brakes have two friction surfaces.
When the brake is in a zero current state, a braking torque is
generated using several springs.
The brake is released electromagnetically. When the motor
brakes, the rotor which can be axially shifted on the hub or the
shaft is pressed via the armature disk against the friction surface
by means of the springs. In the braked state, there is a gap
between the armature disk and the solenoid component.
To release the brake, the solenoid is energized with DC voltage.
The resulting magnetic force attracts the armature disk onto the
solenoid component against the spring force.
The spring force is then no longer applied to the rotor, which can
now rotate freely.
Fig. 11/20
Brake L
Fig. 11/21
Brake FDX
S
G_D087_EN_00145
Pressure
springs
Friction surface
Armature disk
Hub
Axially shiftable
rotor
Pressure
springs
Shaft
Solenoid
assembly
Gap
G_D087_EN_00268
Friction surface
Armature disk
Hub
Axially
shiftable rotor
Shaft
Solenoid
assembly incl.
springs
Gap
S
© Siemens AG 2015