Mitsubishi Electric 800 Series Instruction Manual page 372

5.10.4 Online auto tuning
Magnetic flux Magnetic flux Magnetic flux
If online auto tuning is selected under Advanced magnetic flux vector control, favorable torque accuracy is retained by adjusting
temperature even when the resistance value varies due to increase in the motor temperature.
Pr. Name
95 Online auto tuning selection
C111
574 Second motor online auto
C211 tuning
 Performing online auto tuning at startup (setting value "1")
• By promptly tuning the motor status at startup, accurate operation without being affected by motor temperature is achieved.
Also high torque can be provided at very low speed and stable operation is possible.
• When using Advanced magnetic flux vector control (Pr.80 Motor capacity, Pr.81 Number of motor poles), select the
online auto tuning at start.
• Make sure to perform offline auto tuning before performing online auto tuning.
Operating procedure
1.
Perform offline auto tuning. (Refer to
2.
Check that Pr.96 Auto tuning setting/status = "3 or 103 (offline auto tuning completion)".
3.
Set Pr.95 Online auto tuning selection = "1 (online auto tuning at start)".
4.
Check that the following parameters are set before starting operation.
Pr.
9 Uses both rated motor current and electronic thermal O/L relay.
71 Applicable motor
80 Motor capacity (with the rated motor current equal to or lower than the inverter
rated current)
81 Number of motor poles
*1 If a motor with substantially low rated current compared with the inverter rated current is used, speed and torque accuracies may deteriorate due
to torque ripples, etc. Set the rated motor current to about 40% or higher of the inverter rated current.
5.
In the PU operation mode, press
For External operation, turn ON the start command (STF signal or STR signal).
Initial value Setting range
0 0
1
0 0 and 1
page 353.)
Description
*1
/ on the operation panel.
Description
Do not perform online auto tuning
Perform online auto tuning at startup
Select online auto tuning for the second motor.
(same as Pr.95)
5. PARAMETERS
5.10 (C) Motor constant parameters
3
4
5
5
5
6
7
8
9
10
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