Emotron VS10 - Brake Holding Load

322 01-6203-01R3, CG Drives & Automation
10.11.3. Brake holding load
Depending on the application, a torque at the motor may be required at speed "0" of the
motor shaft:
• In order to hold loads in vertical applications and prevent "sagging".
• In order to prevent a position loss in horizontal applications.
For this purpose, a brake holding load can be set. The brake holding load can be optionally
generated via a ramp to reduce a vibration stimulation that may be caused by the brake
holding load.
Preconditions
Ensure that the inverter builds up a sufficient torque in the motor when releasing and
applying the holding, in order to hold the load.
•
For this purpose, a V/f voltage boost can be set for the V/f characteristic control.  V/f
voltage boost
 123
• The parameters for the V/f voltage boost are automatically set when you carry out an
automatic identification of the motor.
Details
Relevant parameters:
• 0x2820:008 (P712.08): Brake holding load
• 0x2820:013 (P712.13): Holding load ramptime
Setting notes:
• In case of applications with constant load, a constant value is suitable for the brake
holding load.
• If the load constantly changes, a approximate value for the brake holding load has to be
considered.
• Start with the setting "0 %" if you do not know the correct direction, otherwise with,
for instance, "30 %". Afterwards change the setting upwards or downwards in 10-%
steps.
Parameter
Name / value range / [default setting]
Info
0x2820:008
(P712.08)
Holding brake control: Brake holding load
(Brake control: Holding load)
-500.0 ... [0.0] ... 500.0 %
By setting a holding load, the load can be held against the force of
gravity in case of vertical applications, and a position loss can be
prevented in case of horizontal applications.
The setting of "100 %" approximately corresponds to rated motor
tor
que and slip frequency.
Note!
The torque for creating the holding load depends on the selected motor
control type and its settings. Before using this function, make sure that
you have set the motor control type correctly.
0x2820:013
(P712.13)
Holding brake control: Holding load ramptime
(Brake control: HoldLoad ramptim)
0 ... [0] ... 100 ms
From version 03.00
By setting a ramp time, a vibration stimulation can be reduced that
might be caused by the brake holding load 0x2820:008 (P712.08).