Siemens SIMOTICS S-1FK2 User Manual

3.8 Holding brake
3.8.1 Types and modes of operation of the holding brakes
The chapter describes types and modes of operation of the holding brakes.
The type of holding brake installed depends on the size of the motor.
Type of holding brake Spring-loaded brake Permanent-magnet brake
Installed in the motors 1FK2☐03 ... 1FK2☐04 1FK2☐05 ... 1FK2☐10
Method of operation The spring causes a compressive
force on the brake armature disk.
This means that in the no-current
condition, the brake is closed and
the motor shaft is held.
When 24 V DC rated voltage is ap‐
plied to the brake, the current-carry‐
ing coil produces an opposing 󹪝eld.
This neutralizes the force of the
spring and the brake opens without
any residual torque.
The spring-loaded brake has a tor‐
sional backlash less than 1°.
The magnetic 󹪝eld of the perma‐
nent magnets exerts a pulling
force on the brake armature disk.
This means that in the no-current
condition, the brake is closed and
the motor shaft is held.
When 24 V DC rated voltage is
applied to the brake, the current-
carrying coil produces an oppos‐
ing 󹪝eld. This neutralizes the
force of the permanent magnets
and the brake opens without any
residual torque.
The permanent magnet brake
has a torsionally sti󹪜 connection
to the motor rotor.
NOTICE
Damage to the motor due to axial forces on the shaft extension
Axial forces on the shaft extension can damage motors with an integrated holding brake.
• Avoid impermissible forces on the shaft extension. You can 󹪝nd the permitted axial forces
in the section "Permissible radial and axial forces (Page 36)".
Mounting and options
3.8 Holding brake
SIMOTICS S-1FK2 synchronous motors for SINAMICS S120
Operating Instructions, 02/2022, A5E46089564B AD 47

Siemens SIMOTICS S-1FK2 Specifications

General

Brand	Siemens
Model	SIMOTICS S-1FK2
Category	Engine
Language	English