Exhibiting The Best Performance For The Motor (Offline Auto Tuning) (Pr. 71, Pr. 80, Pr. 82 To Pr. 84, Pr. 90, Pr. 96) - Mitsubishi Electric FR-D720-0.4K Instruction Manual

Selection and protection of a motor
4.8.3 Exhibiting the best performance for the motor (offline auto tuning)
(Pr. 71, Pr. 80, Pr. 82 to Pr. 84, Pr. 90, Pr. 96)
The motor performance can be maximized with offline auto tuning.
What is offline auto tuning?
When performing General-purpose magnetic flux 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.
Parameter
Name
Number
71 Applied motor
80 Motor capacity
82 Motor excitation current
83 Rated motor voltage
84 Rated motor frequency
90 Motor constant (R1)
Auto tuning setting/
96
status
The above parameters can be set when Pr. 160 Extended function display selection = "0". (Refer to page 163)
POINT
This function is valid only when a value other than "9999" is set in Pr. 80 and General-purpose magnetic flux
vector control is selected.
You can copy the offline auto tuning data (motor constants) to another inverter with the PU (FR-PU07).
Even when motors (other manufacturer's motor, SF-JRC, etc.) other than Mitsubishi standard motor (SF-JR
0.2kW or higher), high efficiency motor (SF-HR 0.2kW or higher), and Mitsubishi constant-torque motor (SF-
JRCA 4P, SF-HRCA 0.2kW to 15kW) are used or the wiring length is long (30m or longer as a 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 motor may run slightly, fix the motor securely with a mechanical brake or make sure that there will be no
problem in safety if the motor runs (caution is required especially in elevator). Note that tuning performance is
unaffected even if the motor runs slightly.
Reading/writing/copy of motor constants (Pr. 90) tuned by offline auto tuning are enabled.
The offline auto tuning status can be monitored with the operation panel and PU (FR-PU04/FR-PU07).
Do not connect a surge voltage suppression filter (FR-ASF-H/FR-BMF-H) between the inverter and motor.
106
Initial Value Setting Range
0, 1, 3, 13, 23, 40,
0
43, 50, 53
0.1 to 15kW
9999
0 to 500A
9999
100V class,
200V
200V class 0 to 1000V
400V class 400V
60Hz 10 to 120Hz
9999 0 to 50Ω, 9999
0
By selecting a standard motor or constant-
torque motor, thermal characteristic and motor
constants of each motor are set.
Applied motor capacity.
9999 V/F control
Set motor excitation current (no load current)
Uses the Mitsubishi motor (SF-JR, SF-HR,
9999
SF-JRCA, SF-HRCA) constants.
Rated motor voltage (V).
Rated motor frequency (Hz).
Tuning data
(The value measured by offline auto tuning is
automatically set.)
9999: Uses the Mitsubishi motor (SF-JR, SF-
HR, SF-JRCA, SF-HRCA) constants.
0 Offline auto tuning is not performed.
For General-purpose magnetic flux vector
control
11 Offline auto tuning is performed without motor
running.
(motor constant (R1) only)
Offline auto tuning for V/F control (automatic
21 restart after instantaneous power failure (with
frequency search)) (Refer to page 140)
Description