N6: Online Tuning - YASKAWA L1000A Technical Manual

5.9 n: Special Adjustments

◆ n6: Online Tuning

Online Tuning compensates 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). Although this parameter
rarely needs to be changed, 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
Parameters in the n8 group are used to adjust the Initial Rotor Pole Position Search function and other PM motor control
related functions like the current control loop in CLV/PM or voltage saturation prevention (voltage limit).
Initial Rotor Pole Position Search Settings
■
When a PM motor with a non-absolute encoder such as an incremental encoder with a PG-X3 option is used, the drive
needs to search for the rotor pole position before it can operate the motor. This search is performed always:
• when the Up/Down command is issued for the first time after the power has been switched on.
• after one of the following errors occurred: dv1, dv2, dv3, dv4, dv6, dv7, PGo, PGoH.
• when an Up/Down command issued after the setting of parameter n8-35 had been changed.
With default settings the drive will generate a dv8 error if initial rotor pole position search fails (n8-86 = 1). The brake
control output (H2- = 50) will not open in this case.
When not using the drive's brake sequence, include the Motor Pole Search Status signal (digital output programmed for
H2- = 61) so that the brake can open only if motor pole position search has been finished successfully. Refer to
Setting 61: Motor pole search status on page 216
n8-01: Initial Polarity Estimation Current
■
Sets the current used for the initial rotor position estimation as a percentage of the motor rated current.
No.
n8-01
246
Parameter Name
Online Tuning Selection
Parameter Name
Online Tuning Gain
for details.
Parameter Name
Initial Polarity Estimation Current
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
Setting Range
0 to 2
Setting Range
0.1 to 50.0
Setting Range
0 to 100%
Default
2
Default
1.0
Default
50%