Vaidnor VDF730 Series, User Manual

Page: 109 / 166

Description of Function Codes VDF730 User Manual
-
108
-
Function Code Parameter Name Setting Range Default
P1
-
13 Slip compensation coeffcient 0
%–
200
.
0
%
0
.
0
%
It can compensate the rotational speed slip of the asynchronous motor when the load of the
motor increases
,
stabilizing the motor speed in case of load change
.
If this parameter is set to 100
%,
it indicates that the compensation when the motor bears
rated load is the rated motor slip
.
When the motor bears the rated load and this parameter is set to 100
%,
the rotational speed
of the motor is close to the set speed
.
Modify this parameter based on such a principle
.
Before performing automatic torque boost or slip compensation
,
carry out motor auto
-
tuning
to guarantee the control effect
.
Follow the precautions
:
• When this parameter is set to a large value
,
the motor may oscillate
.
In this case
,
decrease the value of this parameter
.
• Do not use the automatic torque boost and slip compensation functions simultaneously
.
Function Code Parameter Name Setting Range Default
P1
-
14 Over
-
excitation gain 0
–
200 64
During deceleration of the AC drive
,
over
-
excitation can restrain rise of the bus voltage
,
preventing the overvoltage fault
.
The larger the over
-
excitation is
,
the better the restraining
result is
.
Set the over
-
excitation gain to 0 in the applications where the inertia is small and the bus
voltage will not rise during motor deceleration or where there is a braking resistor
.
Increase the over
-
excitation gain properly when the inertia is large
.
Function Code Parameter Name Setting Range Default
P1
-
15 No
-
load current 0
.
1 A to P1
-
02 Model dependent
P1
-
16 Stator resistance 0
.
001
–
65
.
535 Ω Model dependent
Set these parameters based on the motor parameters
.
If these parameters are set
incorrectly
,
the control performance will be affected
.
If you are sure about the values
,
perform motor auto
-
tuning
,
or contact the manufacturer of the motor
.
Function Code Parameter Name Setting Range Default
P1
-
17 Oscillation suppression gain 0
–
100 Model dependent
Set this parameter to a value as small as possible in the prerequisite of effcient oscillation
suppression to avoid infuence on V
/
F control
.
Set this parameter to 0 if the motor has no oscillation
.
Increase the value properly only
when the motor has obvious oscillation
.
The larger the value is
,
the better the oscillation
suppression result will be
.
When the oscillation suppression function is enabled
,
the rated motor current and no
-
load current must be correct
.
Otherwise
,
the V
/
F oscillation suppression effect will not be
satisfactory
.