Auto-Tuning; Auto-Tuning For Induction Motors - YASKAWA GA700 Technical Manual

3.8

Auto-Tuning

Auto-Tuning automatically measures the motor characteristics needed for vector control and sets the drive
accordingly. Select the optimum Auto-Tuning method after carefully considering the type of motor being used, the
drive's control method, and the installation environment for the motor.
Messages prompting the input for necessary parameters will be displayed on the keypad. This will be in
accordance with the selected Auto-Tuning method and the control method setting that's been made for A1-02.
WARNING! When performing Rotational Auto-Tuning, the motor rotates at a frequency that is 50% or more of the rated
frequency of the motor. Make sure that there are no issues related to safety in the surrounding area. Failure to comply may
result in death or serious injury and damage to machinery.
◆

Auto-Tuning for Induction Motors

The following explains the method of Auto-Tuning for induction motors. Set the following parameters for Auto-
Tuning.
• Motor parameters E1-xx, E2-xx (for motor 2 E3-xx, E4-xx)
• Speed feedback detection-use F1-xx (only with Closed Loop Vector Control)
Note:
Stationary Auto-Tuning is used as a replacement measure when Rotational Auto-Tuning cannot be carried out. Consequently, a large
discrepancy between the measured results and the motor characteristics could be observed when the Auto-Tuning is complete. After
performing Stationary Auto-Tuning, check the parameters for the measured motor characteristics.
Parame
ter
Method
Set
tings
Rotational Auto- T1-01 =
Tuning 0
Stationary Auto- T1-01 =
Tuning 1 1
Stationary Auto-
T1-01 =
Tuning for Line-to-
2
Line Resistance
■
Input Data for Induction Motor Auto-Tuning
To perform Auto-Tuning, input data for the items marked with "x" in the following chart. Before starting Auto-
Tuning, the motor's test report or nameplate should be available for ready reference.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Table 3.7 Auto-Tuning for Induction Motors
Applicable When/Advantages
• Motor can be decoupled from machinery and rotate
freely while Auto-Tuning is performed
• When running motors having fixed output
characteristics
• When using motors requiring high-precision control
• To assure high-precision motor control, if at all
possible Rotational Auto-Tuning should be carried
out.
• Motor and load cannot be decoupled but the motor
load is below 30%.
• When motor cannot be decoupled from machinery
• When information from the motor's test report or
nameplate is not available
Note:
With Stationary Auto-Tuning, the drive remains
stopped while it is energized for about 1 minute.
During this time the necessary motor parameters are
automatically measured.
• After Auto-Tuning was carried out, the wiring
distance between the drive and motor changed by 50
m or more.
• When the wiring distance exceeds 50 m with V/f
Control method
• When the motor output and drive capacity are
different

3.8 Auto-Tuning

Applicable Control Methods
(Value set in A1-02)
V/f CL-V/f OLV CLV
(0) (1) (2) (3)
x x x x
- - x x
x x x x
AOLV
(4)
x
x
3
x
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