Mitsubishi Electric FR-F820-04750 Instruction Manual page 462

(C) Motor constant parameters
Before performing offline auto tuning
Check the following points before performing offline auto tuning:
● A value other than "9999" is set in Pr. 80 and Pr. 81, and Advanced magnetic flux vector control.
● A motor is connected. (The motor should not be rotated by the force applied from outside during
the tuning.)
● For the motor capacity, the rated motor current should be equal to or less than the rated inverter
current. (It must be 0.4 kW or higher.) If a motor with substantially low rated current compared
with the rated inverter 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 rated inverter current.
● The target motor is other than a high-slip motor, a high-speed motor, or a special motor.
● The highest frequency is 400 Hz.
● The motor may rotate slightly even if the offline auto tuning without motor rotation (Pr. 96 "Auto
tuning setting/status" = "1") is selected. (The slight motor rotation does not affect the tuning
performance.) Fix the motor securely with a mechanical brake, or before tuning, make sure that
it is safe even if the motor rotates. (Caution is required especially in vertical lift applications.)
● Check the following points for the offline auto tuning with motor rotation (Pr. 96 "Auto tuning
setting/status" = "101").
Torque is not sufficient during tuning.
The motor can be rotated up to the speed close to the rated speed.
The mechanical brake is released.
● Offline auto tuning is not performed correctly when the surge voltage suppression filter (FR-ASF-
H/FR-BMF-H) are inserted between the inverter and motor. Be sure to remove them before
performing tuning.
Setting
● To perform tuning, set the following parameters about the motor.
First
motor Pr.
80
81
9
83
84
71
96
Tab. 5-133: Set the parameters before performing tuning
Differs according to the voltage class. (200 V/400 V)
According to the Pr. 71 setting, the range of the motor constant parameter setting values and units
can be changed. Set the Pr. 71 "Applied motor setting" according to the motor to be used and the
motor constant setting range. (For other setting values of Pr. 71, refer to page 5-291.)
5 - 300
Second
Name
motor Pr.
453 Motor capacity
Number of motor
454
poles
Electronic thermal O/L
51
relay
456 Rated motor voltage
Rated motor
457
frequency
450 Applied motor
Auto tuning setting/
463
status
Initial value Description
9999 (V/F control) Set the motor capacity (kW).
9999 (V/F control) Set the number of motor poles (2 to 12).
Rated inverter
Set the rated motor current (A).
current
Set the rated motor voltage (V) printed on the
200 V/400 V
motor's rating plate.
Set the rated motor frequency (Hz).
9999 When the setting is "9999", the Pr. 3 "Base frequency"
setting is used.
Set this parameter according to the motor.
0 (standard
Three types of motor constant setting ranges, units
motor)
and tuning data can be stored according to settings.
Set "1" or "101".
1: Performs tuning without rotating the motor.
(Excitation noise occurs at this point.)
0
101: Performs tuning without rotating the motor.
The motor can rotate up to the speed near the rated
motor frequency.
Parameters