Moog G392-004, Operation Manual

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MSD Servo Drive AC-AC Operation Manual
moog 39
Id. no.: CA65642-001 Date: 03/2012
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Installation
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3.14.3 Switching in the motor cable
ATTENTION! Switching in the motor cable must generally take place in
deenergized state and with deactivated power stage, as otherwise problems,
such as burned off contactor contacts, will occur. In order to assure
deenergized switching on you must make sure that the contacts of the motor
contactor are closed before the servo drive power stage is released. In the
moment the contactor switches off the contacts must remain closed, until
the servo drive power stage has been switched off and the motor current
has dropped to 0. This can be achieved by providing the control sequence of
your machine with appropriate safety periods for the switching of the motor
contactor.
However, despite these measures it cannot be ruled out, that the servo drive will
malfunction when switching in the motor cable.
!
3.15 Braking resistor (RB)
In regenerative operation, e.g. when braking the drive, the motor feeds energy back to
the servo drive. This increases the voltage in the DC link. If the voltage exceeds a switch-
on threshold, the internal brake chopper transistor is activated and a braking resistor
converts the regenerated power into heat.
Device
Mains voltage
1 x 230 V 3 x 230 V 3 x 400V 3 x 460V 3 x 480V
G392-004A 390 V DC - - - -
G392-004 / G395-004
to
G392-032 / G395-032
- 390 V DC 650 V DC 745 V DC 765 V DC
G392-045 / G395-053
to
G395-450
- 820 V DC 820 V DC 820 V DC 820 V DC
Table 3.20 Brake chopper switch-on thresholds (DC link voltage)
3.15.1 Protection in case of a brake chopper fault
ATTENTION! If the internal brake chopper transistor is permanently switched
on, because it is alloyed through by overload (= 0 Ω), there is a protective
function to protect the device against overheating.
You activate this function via Moog D
rive
A
DministrAtor
5 by assigning "BC_
FAIL(56)" to any digital output (expert field “Inputs/outputs” -> „"Digital
outputs“ -> OSD00 to OSD02) with "BC_FAIL(56)". In case of a fault the
selected output will switch from 24 V to 0 V. This signal ensures that the
servo drive is safely disconnected from the mains supply.
Detailed information on parameterization can be found in the MSD Servo Drive AC-AC
user Manual.
!