Danfoss VLT AutomationDrive FC 301 Programming Manual page 50

Parameter Descriptions
Motor size
0.25–7.5 kW
Table 3.7 Changeover Frequency
1-62 Slip Compensation
3 3
Range:
100. [-500
% -
*
500 %]
1-63 Slip Compensation Time Constant
Range:
Size [0.05 -
related 5 s]
*
1-64 Resonance Dampening
Range:
Size [0 -
related 500 %
*
]
48
VLT
Changeover
>10 Hz
Function:
Enter the % value for slip compensation to
compensate for tolerances in the value of n
Slip compensation is calculated automatically,
that is on the basis of the nominal motor speed
n .
M,N
This function is not active when
parameter 1-00 Configuration Mode is set to [1]
Speed closed loop or [2] Torque torque control
with speed feedback or when
parameter 1-01 Motor Control Principle is set to [0]
U/f special motor mode.
Function:
NOTICE
Parameter 1-63 Slip Compensation
Time Constant has no effect when
parameter 1-10 Motor Construction =
[1] PM, non-salient SPM.
Enter the slip compensation reaction
speed. A high value results in slow
reaction, and a low value results in quick
reaction. If low-frequency resonance
problems arise, use a longer time setting.
Function:
NOTICE
Parameter 1-64 Resonance Dampening
has no effect when
parameter 1-10 Motor Construction=[1]
PM, non-salient SPM.
Enter the resonance damping value. Set
parameter 1-64 Resonance Dampening and
parameter 1-65 Resonance Dampening Time
Constant to help eliminate high frequency
resonance problems. To reduce resonance
oscillation, increase the value of
parameter 1-64 Resonance Dampening.
Danfoss A/S © 01/2018 All rights reserved.
®
AutomationDrive FC 301/302
1-65 Resonance Dampening Time Constant
Range:
5 ms [5 - 50
*
ms]
.
M,N
1-66 Min. Current at Low Speed
Range:
100 [1. -
% 200.
*
%]
1-67 Load Type
This parameter is valid for FC 302 only.
Option:
[0] Passive load For conveyors, fan, and pump applications.
*
[1] Active load
Function:
NOTICE
Parameter 1-65 Resonance Dampening
Time Constant has no effect when
parameter 1-10 Motor Construction = [1]
PM, non-salient SPM.
Set parameter 1-64 Resonance Dampening and
parameter 1-65 Resonance Dampening Time
Constant to help eliminate high frequency
resonance problems. Enter the time constant
that provides the best dampening.
Function:
NOTICE
If parameter 40-50 Flux Sensorless Model
Shift is set to [0] Off, this parameter is
ignored.
Enter the minimum motor current at low speed,
see parameter 1-53 Model Shift Frequency.
Increasing this current improves motor torque at
low speed.
Parameter 1-66 Min. Current at Low Speed is
enabled when parameter 1-00 Configuration Mode
[0] Speed open loop only. The frequency converter
runs with constant current through motor for
speeds below 10 Hz.
For speeds above 10 Hz, the motor flux model in
the frequency converter controls the motor.
Parameter 4-16 Torque Limit Motor Mode and/or
parameter 4-17 Torque Limit Generator Mode
automatically adjust parameter 1-66 Min. Current
at Low Speed. The parameter with the highest
value adjusts parameter 1-66 Min. Current at Low
Speed. The current setting in parameter 1-66 Min.
Current at Low Speed is composed of the torque
generating current and the magnetizing current.
Example: Set parameter 4-16 Torque Limit Motor
Mode to 100% and set parameter 4-17 Torque
Limit Generator Mode to 60%. Parameter 1-66 Min.
Current at Low Speed automatically adjusts to
about 127%, depending on the motor size.
Function:
For hoisting applications. This option allows
the frequency converter to ramp up at 0 RPM.
When [1] Active Load is selected, set
MG33MO02