Vaidnor VDF650 Series, Руководство пользователя

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VDF650 User Manual Desc
ription of Function Codes
-
155
-
Function Code Parameter Name Setting Range Default
P2
-
13 Excitation adjustment proportional gain 0
–
20000 2000
P2
-
14 Excitation adjustment integral gain 0
–
20000 1300
P2
-
15 Torque adjustment proportional gain 0
–
20000 2000
P2
-
16 Torque adjustment integral gain 0
–
20000 1300
These are current loop PI parameters for vector control
.
These parameters are automatically
obtained through
"
Asynchronous motor complete auto
-
tuning
"
or
"
Synchronous motor no
-
load auto
-
tuning
",
and need not be modifed
.
The dimension of the current loop integral regulator is integral gain rather than integral time
.
Note that too large current loop PI gain may lead to oscillation of the entire control loop
.
Therefore
,
when current oscillation or torque fluctuation is great
,
manually decrease the
proportional gain or integral gain here
.
Function Code Parameter Name Setting Range Default
P2
-
18
Field weakening mode of
synchronous motor
0
:
No feld weakening
1
:
Direct calculation
2
:
Automatic adjustment
1
P2
-
19
Field weakening depth of
synchronous motor
50
%–
500
%
100
%
P2
-
20 Maximum feld weakening current 1
%–
300
%
50
%
P2
-
21
Field weakening automatic
adjustment gain
10
%–
500
%
100
%
P2
-
22 Field weakening integral multiple 2
–
10 2
These parameters are used to set feld weakening control for the synchronous motor
.
If P2
-
18 is set to 0
,
feld weakening control on the synchronous motor is disabled
.
In this
case
,
the maximum rotational speed is related to the AC drive bus voltage
.
If the motor
'
s
maximum rotational speed cannot meet the requirements
,
enable the field weakening
function to increase the speed
.
The VDF650 provides two field weakening modes
:
direct calculation and automatic
adjustment
.
• In direct calculation mode
,
directly calculate the demagnetized current and manually
adjust the demagnetized current by means of P2
-
19
.
The smaller the demagnetized
current is
,
the smaller the total output current is
.
However
,
the desired feld weakening
effect may not be achieved
.
• In automatic adjustment mode
,
the best demagnetized current is selected automatically
.
This may infuence the system dynamic performance or cause instability
.
The adjustment speed of the field weakening current can be changed by modifying the
values of P2
-
21 and P2
-
22
.
A very quick adjustment may cause instability
.
Therefore
,
generally do not modify them manually
.