Inovance MD500 Series - Auxiliary Control; Current Loop; Improving Field Weakening Area Performance

6. Description of Parameters
- 138 -
6
6.5.9 Current Loop
Function Code Parameter Name Setting Range Default
F2-13
Excitation adjustment proportional gain 0 to 60000 2000
F2-14
Excitation adjustment integral gain 0 to 60000 1300
F2-15
Torque adjustment proportional gain 0 to 60000 2000
F2-16
Torque adjustment integral gain 0 to 60000 1300
These function parameters are vector control current loop PI parameters. They are obtained from
motor auto-tuning. Adjustment of these parameter is not required normally.
The dimension of current loop integral regulator is integral gain rather than integral time. Very
large current loop PI gain may lead to control loop oscillation. When current oscillation or torque
uctuation is great, decrease the proportional gain or integral gain.
6.5.10 Improving Field Weakening Area Performance
Function Code Parameter Name Setting Range Default
A5-05
Max. output voltage coefcient 100% to 110% 105%
This parameter indicates boost capacity of maximum voltage of the AC drive. Increasing A5-05
will improve max. loading capacity in motor eld weakening area. Be aware that this may lead to
an increase in motor current ripple and an increase in motor heating.
Decreasing it will reduce motor current ripple and motor heating. Be aware that this will lower
max. loading capacity in motor eld weakening area. Adjustment of this parameter is not required
normally.
Function Code Parameter Name Setting Range Default
F2-21
Max. torque coefcient of eld
weakening area
50% to 200% 100%
This parameter takes effect only when the motor runs above the rated motor frequency.
When the motor need rapidly accelerate to twice of rated motor frequency but actual acceleration
time is very long, decrease the setting of F2-21 adequately.
When the motor runs above twice of rated motor frequency and speed dip is very large after
a load is added, increase the setting of F2-21 adequately. Adjustment of this parameter is not
required normally.
6.5.11 Auxiliary Control
Function Code Parameter Name Setting Range Default
A5-00
DPWM switchover frequency upper limit 0.00 to 15.00 Hz 12.00 Hz
Increasing this parameter to the max. frequency will reduce motor audible noise.
Function Code Parameter Name Setting Range Default
A5-01
PWM modulation pattern 0: Asynchronous modulation
1: Synchronous modulation
0
When the output current oscillates or large current harmonics occur, set A5-01 = 1.
Function Code Parameter Name Setting Range Default
A5-03
Random PWM depth 0: Random PWM invalid
1 to 10
0
This parameter helps to lower motor audible noise and reduce electromagnetic interference.