N6: Online Tuning - YASKAWA U1000 Series Technical Manual

This value can be set automatically by Inertia Tuning. If Inertia 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.
Setup parameter n5-02 correctly.
3.
Couple motor and load.
4.
Set the acceleration time C1-01 to 0.
5.
Set the torque limits in the L7- 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 f
accel Lim_Test rated
n5-03 = - 1
n5-02 f 100
ref_Test

◆ n6: Online Tuning

Online Tuning prevents loss from insufficient torque and diminished speed control accuracy due to fluctuating motor
temperature.
n6-01: Online Tuning Selection
■
Selects the type of motor data Online Tuning uses for Open Loop Vector 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 if the Energy Saving function is disabled (b8-01 = 0).
n6-05: Online Tuning Gain
■
Sets the compensation gain for the voltage correction in the Online Tuning function (n6-01 = 2). Normally there is no
need to adjust n6-05, but increase the set value in steps of 0.1 if an overload fault occurs during voltage correction.
No.
n6-05
◆ n8: PM Motor Control Tuning
These parameters are available in the vector control modes for permanent magnet motors and can be used to adjust
control performance.
n8-01: Initial Rotor Position Estimation Current
■
Sets the current used for initial rotor position estimation as a percentage of the motor rated current (for PM Motors)
(E5-03). If the motor nameplate lists an "Si" value, that value should be entered here.
There is normally no need to change this parameter from the default value.
Note: This parameter is available in AOLV/PM or CLV/PM.
No.
n8-01
YASKAWA ELECTRIC SIEP C710636 02B YASKAWA U1000 Technical Manual
).
accel
Where:
• t is the measured acceleration time in s.
accel
• f is the rated frequency of the motor in Hz.
rated
• 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
Name
Online Tuning Gain
Name
Initial Rotor Position Estimation Current
5.9 n: Special Adjustments
).
ref_Test
Setting Range Default
0 to 2
Setting Range Default
0.1 to 50.0
Setting Range Default
0 to 100%
).
Lim_Test
0
1.0
5
50%
325