Danfoss VLT AutomationDrive FC 301 Programming Manual page 56

Parameter Descriptions
1-62 Slip Compensation
Range:
3 3
1-63 Slip Compensation Time Constant
Range:
Size [0.05 -
related 5 s]
*
1-64 Resonance Dampening
Range:
100 [0 -
% 500 %]
*
1-65 Resonance Dampening Time Constant
Range:
5 ms [5 - 50
*
ms]
54
VLT
Function:
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.
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.
Danfoss A/S © 02/2016 All rights reserved.
®
AutomationDrive FC 301/302
1-66 Min. Current at Low Speed
Range:
Size
related 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
1-68 Motor Inertia
Range:
0 kgm² [0.0000 -
*
10000.0000
kgm²]
Function:
[ 1 - 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:
Use for hoisting applications. This option
allows the frequency converter to ramp up at
0 RPM. When [1] Active Load is selected, set
parameter 1-66 Min. Current at Low Speed to a
level which corresponds to maximum torque.
Function:
Enter the motor inertia to obtain an
improved torque readout and
therefore a better estimate of the
mechanical torque on the shaft.
Available in flux control principle
only.
MG33ML02