8400 HighLine | Parameter setting & configuration
Motor control (MCTRL)
V/f characteristic control (VFCplus)
114 L Firmware ≤ 05.00 - DMS 4.2 EN - 02/2010
5.4.1 Basic settings
The "Initial commissioning steps" listed in the table below are sufficient for a simple
characteristic control.
Detailed information on the individual steps can be found in the following
subchapters.
Tip!
Information on the optimisation of the control mode and the adaptation to the
real application is provided in the "Optimise control behaviour
" chapter. ( 116)
Parameterisable additional functions are described correspondingly in the
"Parameterisable additional functions
" chapter. ( 168)
5.4.1.1 Defining the V/f characteristic shape
In principle, three different characteristic shapes can be stipulated:
1. Linear V/f characteristic:
For drives for a constant, speed-independent load torque.
2. Quadratic V/f characteristic:
For drives with a load torque curve which is quadratic or in relation to speed. Quadratic
V/f characteristics are preferred in the case of centrifugal pumps and fan drives.
3. Freely definable V/f characteristic (as of version 04.00.00):
For drives that require adaptation of the magnetising current by means of the output
speed. The freely definable V/f characteristic can be used e.g. for operation in
conjunction with special machines such as reluctance motors in order to suppress
oscillations at the machine or to optimise energy consumption.
[5-4] Principle of a linear and quadratic V/f characteristic
Initial commissioning steps
1. Defining the V/f characteristic shape
. ( 114)
2. Defining current limits (Imax controller)
. ( 115)
8400vec085 / 8400vec086
01
0
100 %
N
n
n
U
min
U
out
01
0
100 %
N
n
n
U
min
U
out
efesotomasyon.com - Lenze
To Next Page
Loading...
Need help?
General
