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71
Before operation
4
DRIVING THE MOTOR
4.3.10 Exhibiting the best performance of the motor performance (offline auto tuning)
(Pr. 71, Pr. 83, Pr. 84, Pr. 96)
The motor performance can be maximized with offline auto tuning.
• What is offline auto tuning?
When performing Advanced magnetic flux vector control, Real sensorless vector control or vector control, the
motor can be run with the optimum operating characteristics by automatically measuring the motor constants
(offline auto tuning) even when each motor constants differs, other manufacturer's motor is used, or the wiring
length is long. (30m or longer as reference)
Parameter
Number
Name
Initial
Value
Setting Range Description
71 Applied motor
0
0 to 8, 13 to 18,
30, 33, 34, 40,
43, 44, 50, 53, 54
By selecting a standard motor or constant-torque
motor, thermal characteristic and motor constants
of each motor are set.
83 Rated motor voltage 200/400V * 0 to 1000V
Set the rated motor voltage(V).
* The initial value differs according to the voltage
level. (200V/400V)
84 Rated motor frequency
60Hz 10 to 120Hz Set the rated motor frequency (Hz).
96
Auto tuning setting/
status
0
0 Offline auto tuning is not performed
1
Offline auto tuning is performed without motor
running
101 Offline auto tuning is performed with motor running
POINT
· This function is valid only when a value other than "9999" is set in Pr. 80 and Pr. 81 and Advanced magnetic flux
vector control, Real sensorless vector control or vector control is selected.
· You can copy the offline auto tuning data (motor constants) to another inverter with the PU (FR-DU07/FR-PU07).
· Even when motors (other manufacturer's motor, SF-JRC, etc.) other than Mitsubishi standard motor (SF-JR
3.7kW or higher), high efficiency motor (SF-HR 3.7kW or higher), Mitsubishi constant-torque motor (SF-JRCA 4P,
SF-HRCA 3.7kW or higher) and vector control dedicated motor (SF-V5RU (1500r/min series)) are used or the
wiring length is long (30m or longer as reference), using the offline auto tuning function runs the motor with the
optimum operating characteristics.
· Tuning is enabled even when a load is connected to the motor. (As the load is lighter, tuning accuracy is higher.
Tuning accuracy does not change even if the inertia is large.)
· For the offline auto tuning, you can select either the motor non-rotation mode (Pr. 96 = "1") or rotation mode (Pr. 96
= "101").
· The rotation mode has higher tuning accuracy than the non-rotation mode.
· Reading/writing/copy of motor constants tuned by offline auto tuning are enabled.
· The offline auto tuning status can be monitored with the PU (FR-DU07/FR-PU07/FR-PU04).
· Do not use an inverter with a surge voltage suppression filter (FR-ASF-H) connected between the inverter and motor.
Magnetic flux
Magnetic flux
Magnetic flux
Sensorless
Sensorless
Sensorless Vector
Vector
Vector