Lenze MDXMA Series User Manual

Technical data
Holding brake (option)
Permanent magnet holding brakes
3
 22
BA33.0001 EN 2.0
3.4.1 Permanent magnet holding brakes
These brakes serve as a holding brake to hold the axles when the machine is at standstill
or deenergised. When controlling the brake it must b e ensured that the brake is activated
(released, engaged) at a speed of 0 min
-1
to avoid unnecessary and rapid wear on the
friction surfaces of the brake.
When used solely as a holding brake, practically no wear occurs on the friction surfaces. If
the max. permissible switching energy per emergency stop (see catalogue) is not
exceeded, at least 2000 emergency stop functions are possible at a speed of 3000 min
-1
.
W
=
½
⋅
J
t
o
t
a
l
⋅
ω
2
W[J] Energy
W
=
½
⋅
J
total
⋅
ω
2
J
total
[kgm
2
] Total moment of inertia
ω [
1
/
s
] Angular speed ω =2π
n
/
60
, n = speed [min
-1
]
The holding torques specified in the catalogue only apply when the motor is at standstill.
In the case of a slipping brake, the dynamic braking torque always applies.
 Stop!
The holding brake is only designed for a limited number of emergency stops.
Utilisation as a working brake, e.g. to decelerate a load, is not permissible.
 Note!
The brakes are maintenance-free and cannot be adjusted. In the event of wear,
e.g. through emergency stops, the brakes must be replaced.
Thesebrakes functioninaccordancewiththeclosed-circuitprinciple,i.e.thebrakeis closed
when the motor is deenergised.
Brakes with a rated voltageofDC 24 V are designed for s moothed DC voltages with a ripple
of <1 %. It must be ensured that the connector on the motor side is supplied with the
minimum voltage of DC 24 V -10 %. If necessary, the voltage drop in the cable should also
be considered. If the maximum voltage DC 24 V + 5 % is exceeded, the brake can close
again. Supplying the brake with bridged DC voltage (bridge rectifier without additional
smoothing) or a DC voltage with a ripple of >1 % can lead to a malfunctioning of the brake
or an increase in the engagement and disengagement times.
Brakes with a rated voltage of DC 205 V are designed for bridged DC voltage, i.e. for supply
via a bridge rectifier from the 230 V mains (half-wave rectifier are not permissible).
Supplying the brake with smoothed DC voltage can lead to a malfunction or an increase in
the linking and disengagement times. With regard to the minimum and maximum
voltages, the same conditions apply as for brakes with 24 V, i.e. the permissible voltage
tolerance is 205 V DC +5 %, -10 %.

Lenze MDXMA Series Specifications

General

Brand	Lenze
Model	MDXMA Series
Category	Servo Drives
Language	English