N6: Online Tuning - YASKAWA U1000 Technical Manual

5.9 n: Special Adjustments
2.
Decouple motor and load.
3.
Perform Auto-Tuning or manually enter the correct motor data.
4.
Properly set up the speed loop (ASR).
5.
Set the acceleration time to zero.
6.
Set the forward torque limit in parameter L7-01 to 100%.
7.
Set the frequency reference equal to the motor rated speed.
8.
While monitoring the motor speed in U1-05, start the motor in the forward direction and measure the time it takes to
reach the rated speed.
9.
Reverse the parameter settings above and set the measured time to parameter n5-02.
n
n5-03: Feed Forward Control Gain
Sets the inertia ratio of the load connected to the motor. This value can be set automatically by Inertia Auto-Tuning.
No.
n5-03
Set this value automatically with Inertia Auto-Tuning. If Inertia Auto Tuning cannot be performed, determine the value for
parameter n5-03 using the following steps:
1.
Select the control mode; CLV (A1-02 = 3), AOLV/PM (A1-02 = 6), or CLV/PM (A1-02 = 7).
2.
Set parameter n5-02 correctly.
3.
Couple motor and load.
4.
Set the acceleration time in C1-01 to 0.
5.
Set the torque limits in the L7-oo parameters to a value that will easily be reached during the test (T
6.
Set the frequency reference equal to a value in the upper speed range of the machine (f
7.
While monitoring the motor speed in U1-05, start the motor in the forward direction and measure the time it takes to
reach the reference speed (t
8.
Reverse the parameter settings above and calculate the set value for parameter n5-03 using the formula below.
t T
accel Lim_Test
n5-03 =
n5-02 f
ref_Test
u

n6: Online Tuning

Online Tuning prevents loss from insufficient torque and diminished speed control accuracy due to fluctuating motor
temperature.
n
n6-01: Online Tuning Selection
Selects the type of motor data Online Tuning uses for OLV control.
No.
n6-01
Setting 0: Disabled
Setting 1: Line-to-line Resistance Tuning
This setting enables line-to-line resistance online tuning. This procedure is effective for speed values up to 6 Hz and improves
the overload capacity in the low speed range by adjusting the value set for the motor resistance.
Setting 2: Voltage Correction
The drive adjusts the output voltage during run to improve overload tolerance and minimize the effects of high temperatures
on speed accuracy.
Note: This setting can only be selected when the Energy Saving function is disabled (b8-01 = 0).
338
Parameter Name
Feed Forward Control Gain
).
accel
Where:
• t is the measured acceleration time in s.
accel
f
rated
• f is the rated frequency of the motor in Hz.
- 1
rated
100
• T is torque limit setting during the test (%).
Lim_Test
• f is the frequency reference during the test in Hz.
ref_Test
Name
Online Tuning Selection
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
Setting Range
0.00 to 100.00
).
ref_Test
Setting Range
0 to 2
Default
1.00
).
Lim_Test
Default
0