Lenze 8400 StateLine - Manual (Page 413)

Lenze · 8400 StateLine · Reference manual · DMS 12.0 EN · 06/2014 · TD05/TD14
413
8 Basic drive functions (MCK)
8.4 Holding brake control
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8.4.2.6 Motor magnetising time (only with asynchronous motor)
[8-8] Considering the motor magnetising time taking the PM brake as an example
Related topics:
 Process when brake is released ( 414)
8.4.2.7 Actual value monitoring
If an actual value monitoring time > 0 s is selected in C02593/1 , the actual speed time monitoring
is active.
• The monitoring time starts when the speed setpoint has reached the lower switching threshold
and the actual speed is still above this threshold. (see illustration [8-11] in chapter " Process
when brake is closed ".)
• If the actual speed is still above the threshold when the monitoring time has expired, the brake
will be automatically applied in the automatic brake control mode (mode 12).
 Motor magnetising time
CINH = controller inhibit
• When an asynchronous motor is used, first
the magnetic field required for the holding
torque is created (which is already
available when a synchronous motor is
used) after the controller inhibit is
deactivated.
• The motor is internally magnetised
through internal feedforward control of
the lower speed threshold. The release
time set in C02589/2 is considered here.
t
t
Œ
t
CINH
bMBrakeReleaseOut
I
BRK

Note!
In the Lenze setting, the actual speed time monitoring is deactivated ( C02593/1 = "0 s"),
i.e. the brake will only be applied when the actual speed has reached the lower switching
threshold.