Lenze M Series - Page 24

Holding brake (option)
Perm anent magnet holding brakes
Mechanical installation 5
W ear o f perm anent m agnet brakes
If applied as directed (application as holding brakes), the perm anent m agnet brakes of
the servo motors are w ear free and intended fo r long operating times. The wear on the
friction lining is due to e.g. em ergency stops.
The table below describes the different reasons for w ear and th eir im pact on the
com ponents o f the perm anent m agnet brakes.
Component Effects Influencing factors Cause
Friction lining /
friction surface at
the armature plate
and external pole
Wear on the friction lining Applied friction energy Braking during operation
(impermissible, holding
brakes!)
Emergency stops
Overlapping wear when
the drive starts and stops
Active braking by the drive
motor with the help of the
brake (quick stop)
Springs Fatigue failure of the
springs
Number of switching
operations of the brake
Axial duty cycle of the
springs
Permanent magnet Useless brake Temperature, overvoltage Excessive overvoltages /
temperatures
@ Stop!
In case o f wear above the m axim um air gap (@ brake operating
instructions), application of the brake cannot be ensured. In this case, no
braking process is carried out.
EN
Lenze • BA 33.0006 • 3.0
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