Lenze 8400 StateLine C User Manual

8400 StateLine C | Reference manual
Motor control (MCTRL)
V/f characteristic control (VFCplus)
134 L Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011
5.4.3.2 Adapting the Vmin boost
The V
min
boost (C00016) of the motor voltage serves to select a load independent
magnetising current which is required for asynchronous motors. The torque behaviour of
the motor can be optimised by adapting the setting in C00016
.
The general linear and quadratic V/f characteristics are shown in the illustrations below.
The illustrations show the impacts of the parameters used to adapt the characteristic
shape.
[5-5] Representation of the linear V/f characteristic (on the left) and quadratic V/f characteristic (on the right)
 How to set the V
min
boost:
1. Operate motor in idle state at approx. 6 % of the rated motor speed.
2. Increase V
min
boost (C00016) until the following motor current is reached:
Motor in short-time operation up to 0.5 n
rated
• for self-ventilated motors: I
motor
≈ I
rated motor
• for forced ventilated motors: I
motor
≈ I
rated motor
Motor in continuous operation up to 0.5 n
rated
• for self-ventilated motors: I
motor
≈ 0.8 I
rated motor
• for forced ventilated motors: I
motor
≈ I
rated motor
 Note!
The V
min
boost has an effect on output frequencies below the V/f base
frequency (C00015
).
C0001 5
C0001 6
C0001 5
2
C0001 6
2
V [V]
out
f [Hz]
V
(100 %)
rmot
1/N/PE AC264 V
3/PE AC264 V
3/PE AC 550 V
1/N/PE AC180 V
3/PE AC100 V
3/PE AC320 V
C0001 5
C0001 6
V [V]
out
f [Hz]
V
(100 %)
rmot
1/N/PE AC264 V
3/PE AC264 V
3/PE AC 550 V
1/N/PE AC180 V
3/PE AC100 V
3/PE AC320 V
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Lenze 8400 StateLine C Specifications

General

Brand	Lenze
Model	8400 StateLine C
Category	Inverter Drive
Language	English