IACDRIVE I5300 Series User Manual page 155

I5300 User Manual
Function Code
P2-13 Excitation adjustment proportional gain
P2-14 Excitation adjustment integral gain
P2-15 Torque adjustment proportional gain
P2-16 Torque adjustment integral gain
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 modified.
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
Field weakening mode of
P2-18
synchronous motor
Field weakening depth of
P2-19
synchronous motor
P2-20 Maximum field weakening current
Field weakening automatic
P2-21
adjustment gain
P2-22 Field weakening integral multiple
These parameters are used to set field 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.
I5300 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 field weakening
effect may not be achieved.
• In automatic adjustment mode, the best demagnetized current is selected automatically.
This may influence 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,
Parameter Name
Parameter Name
- 155 -
Description of Function Codes
Setting Range
0–20000
0–20000
0–20000
0–20000
Setting Range
0: No field weakening
1: Direct calculation
2: Automatic adjustment
50%–500%
1%–300%
10%–500%
2–10
Default
2000
1300
2000
1300
Default
1
100%
50%
100%
2