Lenze L-force HighLine C 8400 Series Reference Manual page 268

8400 HighLine C | Reference manual
Motor control (MCTRL)
Parameterisable additional functions
Example: Voltage increase in the DC bus when field weakening is switched off
(For instance by an active setting of the controller inhibit or by tripping a fault or error at
high motor speed.)
Field weakening
Switched off
Switched-on
U
840 V
560 V
[5-29] Example: Possible DC-bus voltage > 800 V if field weakening gets lost
268
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 If pulse inhibit occurs at 6000 rpm and switched-on
field weakening, the DC bus is loaded to more than
> 800 V
800 V ( ).
Œ
 A speed limitation to 5700 rpm is required since this
speed causes a DC-bus voltage of 800 V if field
weakening is switched off.
n
4000 6000
L
Speed n Motor voltage peak value
4000 rpm
5700 rpm
6000 rpm
6000 rpm
Firmware ≤ 11.00 - DMS 6.0 EN - 10/2011
560 V
800 V
840 V
560 V