
8400 motec | Software Manual
Motor control (MCTRL)
Braking operation/braking energy management
118
L
Firmware
≤
02.00 - DMS 2.1 EN - 03/2011
How to set the "inverter motor brake" function for an oscillation-reduced
operation:
For V/f characteristic open-loop control/closed-loop control (VFCplus):
• Set reduced brake chopper threshold (
• Set additive speed (
) to rated slip speed.
• Adapt the deceleration ramp in order that the deceleration time is slightly
below (10 ... 30 %) the deceleration time to be implemented with the inverter
motor brake.
How to set the "inverter motor brake" function for a maximum acceleration ramp:
For V/f characteristic open-loop control/closed-loop control (VFCplus):
• Set reduced brake chopper threshold (
• Set additive speed (
) to 1.5 ... 2.5 times the rated slip speed.
• Adapt the deceleration ramp in order that the deceleration time is slightly
below (10 ... 30 %) the deceleration time to be implemented with the inverter
motor brake.
For sensorless vector control (SLVC):
• Set reduced brake chopper threshold (
• Set additive speed (
) to 2 ... 4-fold rated slip speed.
• Adapt the deceleration ramp in order that the deceleration time is slightly
below (10 ... 30 %) the deceleration time to be implemented with the inverter
motor brake.
Note!
When the "inverter motor brake" function is used, torque oscillations take place
which can have a negative effect on the service life of the mechanical drive train
(e.g. gearbox).
• The amount of oscillations depends on the drive train (mass inertia, natural
frequencies, etc.) and the setting of the function.
• We recommend to optimise the "inverter motor brake" function for an
oscillation-reduced operation as described in the following. Usually, no
torque oscillations occur with this setting which may affect the service life of
the gearbox.
• The settings for implementing a maximum acceleration ramp are only
recommended if the inverter motor brake is rarely is used (e.g. with quick
stop).
Содержание 8400 motec Series
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