Mitsubishi Electric FR-A820-00046 Instruction Manual page 638

(C) Motor constant parameters
Setting
● To perform tuning, set the following parameters about the motor.
First
motor Pr.
80
81
9
84
83
71
96
Tab. 5-186: Set the parameters before performing tuning
Set Pr. 71 "Applied motor" according to the motor to be used. According to the Pr. 71 setting, the
range of the motor constant parameter setting values and units can be changed. (For other setting
values of Pr. 71, refer to page 5-434.)
Motor
IPM motor
SPM motor
Tab. 5-187: Motor selection
NOTES If PM sensorless vector control is performed, tuning cannot be performed even when Pr. 96 =
"101" is set. If MM-CF is set to the applied motor, tuning cannot be performed even when Pr. 96 =
"1, 101" is set.
● For the tuning accuracy improvement, set the following parameter when the motor constant is
known in advance.
First
motor Pr.
702
707
724
725
Tab. 5-188: Parameter settings to improve the tuning accuracy
The setting is valid only when both of the Pr. 707 (Pr. 744) and Pr. 724 (Pr. 745) settings are other
than "9999".
5 - 458
Second
Name
motor Pr.
453 Motor capacity
454 Number of motor poles
Electronic thermal O/L
51
relay
457 Rated motor frequency
456 Rated motor voltage
450 Applied motor
463 Auto tuning setting/status 1
MM-CF
Other than MM-CF
Second
Name
motor Pr.
Maximum motor
743
frequency
744 Motor inertia (integer)
745 Motor inertia (exponent)
Motor protection current
746
level
Setting for a PM motor other than
MM-CF
Motor capacity (kW)
The number of motor poles (2 to 12)
Rated motor current (A)
Rated motor frequency (Hz)
Rated motor voltage (V)
8090, 8093 (IPM motor)
9090, 9093 (SPM motor)
Motor constant parameter
Ω, mH and A unit setting
330
8090
9090
Setting for a PM motor other than
MM-CF
The maximum motor frequency [Hz]
Motor inertia
Jm = Pr. 707 × 10^(– Pr. 724) [kg/m
Maximum current level of the motor [%]
Parameters
Setting for MM-CF
Set by the IPM
parameter initialization
(Refer to page 5-71.)
Rated motor voltage (V)
written on the rated
plate
330 and 333
11
Pr. 71 setting
Motor constant parameter
Internal data setting
333 (334)
8093 (8094)
9093 (9094)
Setting for MM-CF
9999 (initial value)
9999 (initial value)
2
]
9999 (initial value)