Lenze L-force 8400 BaseLine D, Руководство пользователя программного обеспечения

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8400 BaseLine D | Software Manual
Motor control (MCTRL)
Selection of the operating mode
78
L
Firmware 03.00 - DMS EN 5.0 - 07/2009
Setting V
min
boost
The V
min
boost C016 of the motor voltage

serves to select a magnetising current required for asynchronous motors independent
of the load.

is effective for output frequencies below the V/f base frequency

optimises the torque behaviour of the motor.
The general linear and quadratic V/f characteristics are shown in the following
illustrations. The illustrations show the impacts of the parameters used to adapt the
characteristic shape.
The maximum motor voltage to be reached depends on the current mains voltage height.
[5-2] Representation of the linear V/f characteristic (on the left) and quadratic V/f characteristic (on the right)

How to adjust the Vmin boost:
1. Operate motor in idle state at approx. 6 % of the rated motor speed.
2. Increase V
min
until the following motor current is reached:
• Motor in short-time operation up to 0.5 n
rated
with self-ventilated motors: I
motor
≈
I
rated motor
with forced-ventilated motors: I
motor
≈
I
rated motor
• Motor in continuous operation up to 0.5 n
rated
with self-ventilated motors: I
motor
≈
0.8 I
rated motor
with forced ventilated motors: I
motor
≈
I
rated motor
C00015
C00016
C00015
2
C00016
2
V [V]
out
f [Hz]
V
(100 %)
rmot
1/N/PE AC 264 V
3/PE AC 550 V
1/N/PE AC 180 V
3/PE AC 320 V
C00015
C00016
V [V]
out
f [Hz]
V
(100 %)
rmot
1/N/PE AC 264 V
3/PE AC 550 V
1/N/PE AC 180 V
3/PE AC 320 V