GEA ARIETE - Load Compensation at Low Speed; Load Compensation at High Speed; Slip Compensation; Slip Compensation Time Constant

VLT
®
5000 Series
slip frequency, parameters 110 and 111 are of no
significance.
113
113 Load compensation at low speed
(LO SPD LOAD COMP)
Value:
0 - 300 %
✭ 100 %
Function:
This parameter enables compensation of voltage in
relation to load when the motor is running at low
speed.
Description of choice:
Optimum U/f characteristics are obtained, i.e. com-
pensation for the load at low speed. The frequency
range within which
Load compensation at low speed
is active, depends on the motor size.
This function is active for:
Motor size Change-over
0.5 kW - 7.5 kW < 10 Hz
11 kW - 45 kW < 5 Hz
55 kW - 355 kW < 3-4 Hz
114
114 Load compensation at high speed
(HI SPD LOAD COMP)
Value:
0 - 300 %
✭ 100 %
Function:
This parameter enables compensation of voltage in
relation to load when the motor is running at high
speed.
Description of choice:
In Load compensation at high speed it is possible to
compensate for the load from the frequency where
Load compensation at low speed stopped working to
max. frequency.
This function is active for:
Motor size Change-over
0.5 kW - 7.5 kW >10 Hz
11 kW - 45 kW >5 Hz
55 kW - 355 kW >3-4 Hz
115
115 Slip compensation
(SLIP COMPENSAT.)
Value:
-500 - 500 %
✭ 100 %
Function:
Slip compensation is calculated automatically, i.e. on
the basis of the rated motor speed n
M,N
.
In parameter 115, slip compensation can be ad-
justed in detail, which compensates for tolerances in
the value of n
M,N
.
This function is not active together with Variable
torque (parameter 101 - variable torque graphs),
Torque control, Speed feedback and Special motor
characteristics.
Description of choice:
Enter a %-value of the rated motor frequency (pa-
rameter 104).
116
116 Slip compensation time constant
(SLIP TIME CONST.)
Value:
0.05 - 5.00 sec.
✭ 0.50 sec.
Function:
This parameter determines the slip compensation re-
action speed.
Description of choice:
A high value results in slow reaction. Conversely , a
low value results in quick reaction.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.51.A1.02 - VLT is a registered Danfoss trade mark
115
Programming