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Selection and protection of a motor
(1) Before performing offline auto tuning
Check the following before performing offline auto tuning.
Make sure General-purpose magnetic flux vector control (Pr. 80) is selected. (Tuning can be performed even under V/F
control selected by turning on X18.)
A motor should be connected. Note that the motor should be at a stop at a tuning start.
The motor capacity should be equal to or one rank lower than the inverter capacity. (note that the capacity should be
0.1kW or more)
The maximum frequency is 120Hz.
A high-slip motor, high-speed motor and special motor cannot be tuned.
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.
Offline auto tuning will not be performed properly if it is performed with a reactor or surge voltage suppression filter (FR-
ASF-H/FR-BMF-H) connected between the inverter and motor. Remove it before start tuning.
(2) Setting
1) Select General-purpose magnetic flux vector control (Refer to page 75).
2) Set "11" in Pr. 96 Auto tuning setting/status.
Tuning motor constants (R1) only without running the motor. (It takes approximately 9s until tuning is completed.)
3) Set the rated motor current (initial value is rated inverter current) in Pr. 9 Electronic thermal O/L relay. (Refer to page 100)
4) Set the rated voltage of motor (initial value is 200V/400V) in Pr. 83 Rated motor voltage and rated motor frequency (initial
value is 60Hz) in Pr. 84 Rated motor frequency.
(For a Japanese standard motor, etc. which has both 50Hz and 60Hz rated values, use it with an initial value (200V/60Hz
or 400V/60Hz).
5) Set Pr. 71 Applied motor according to the motor used.
Motor Pr. 71 Setting
Mitsubishi standard motor
Mitsubishi high efficiency motor
SF-JR 3
SF-JR 4P 1.5kW or less 23
SF-HR 43
Others 3
Mitsubishi constant-torque motor
SF-JRCA 4P 13
SF-HRCA 53
Others (SF-JRC, etc.) 13
Other standard motor — 3
Other constant-torque motor — 13