High Speed Load Compensation; Slip Compensation; Resonance Damping; Resonance Damping Time Constant - Danfoss VLT AutomationDrive FC 302 Programming Manual

Parameter Descriptions
U
m
Par.1-60
100%
60%
0%
Changeover
Illustration 3.11 Changeover

1-61 High Speed Load Compensation

Range: Function:
100 % [0 - Enter the % value to compensate voltage in
*
300 %] relation to load when the motor is running
at high speed and obtain the optimum U/f
characteristic. The motor size determines the
frequency range within which this parameter
is active.
Motor size
0.25–7.5 kW
Table 3.7 Changeover Frequency

1-62 Slip Compensation

Range: Function:
Size [-500 Enter the % value for slip compensation to
related - compensate for tolerances in the value of
*
500 %] n . Slip compensation is calculated automat-
M,N
ically, that is on the basis of the nominal
motor speed 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.
1-63 Slip Compensation Time Constant
Range: Function:
NOTICE
Size [0.05 -
related 5 s]
*
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
MG33MP02
Programming Guide
Par.1-61
f
out
Changeover
>10 Hz
.
M,N
Danfoss A/S © 10/2018 All rights reserved.
1-63 Slip Compensation Time Constant
Range: Function:
reaction, and a low value results in quick
reaction. If low-frequency resonance
problems arise, use a longer time setting.

1-64 Resonance Damping

Range: Function:
NOTICE
Size [0 -
related 1000 %
*
Parameter 1-64 Resonance Damping has
]
no effect when parameter 1-10 Motor
Construction=[1] PM, non-salient SPM.
Enter the resonance damping value. Set
parameter 1-64 Resonance Damping and
parameter 1-65 Resonance Damping Time
Constant to help eliminate high frequency
resonance problems. To reduce resonance
oscillation, increase the value of
parameter 1-64 Resonance Damping.

1-65 Resonance Damping Time Constant

Range: Function:
NOTICE
5 ms [1 - 50
*
ms]
Parameter 1-65 Resonance Damping Time
Constant has no effect when
parameter 1-10 Motor Construction = [1]
PM, non-salient SPM.
Set parameter 1-64 Resonance Damping and
parameter 1-65 Resonance Damping Time
Constant to help eliminate high frequency
resonance problems. Enter the time constant
that provides the best dampening.
1-66 Min. Current at Low Speed
Range: Function:
NOTICE
Size [ 1 -
related 200 %
*
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
3 3
57