Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

Page: 683 / 1218

Parameters (C) Motor constant parameters
FR-A800 5 - 481
Changing the motor constant (if setting motor constants in the internal data of the inverter)
●
Set Pr. 71 as follows.
●
Set a given value as the motor constant parameter. The displayed increments of the read motor
constants can be changed with Pr. 684 "Tuning data unit switchover".
For the FR-A820-03160(55K) or lower and FR-A840-01800(55K) or lower.
For the FR-A820-03800(75K) or higher and FR-A840-02160(75K) or higher.
Motor Pr. 71 setting
IPM motor
MM-CF 333 (334)
Other than MM-CF 8093 (8094)
SPM motor 9093 (9094)
Tab. 5-198: Motor selection
First
motor
Pr.
Second
motor
Pr.
Name
Pr. 684 = 0 (initial value) Pr. 684 = 1
Initial
value
Setting
range
Setting in-
crements
Range indication
Unit
indication
90 458 Motor constant (R1)
0 to ***,
9999
1
0 to 50 Ω, 9999 0.001 Ω
9999
0 to 400 mΩ, 9999 0.01 mΩ
92 460
Motor constant (L1)/
d-axis inductance
(Ld)
0 to 500 mH, 9999 0.01 mH
0 to 50 mH, 9999 0.001 mH
93 461
Motor constant (L2)/
q-axis inductance
(Lq)
0 to 500 mH, 9999 0.01 mH
0 to 50 mH, 9999 0.001 mH
706 738
Induced voltage
constant (phi f )
0 to 5000 mV/s/rad,
9999
0.1 mV/
(rad/s)
859 860
Torque current/
Rated PM motor
current
0 to 500 A, 9999 0.01 A
0 to 3600 A, 9999 0.1 A
Tab. 5-199: Parameter setting ranges
NOTES As the motor constants measured in the offline auto tuning have been converted into internal
data (****), refer to the following setting example when making setting:
Setting example:
To slightly increase Pr. 90 value (5%)
If Pr. 90 = "2516" is displayed
The value can be calculated with "2516 × 1.05 = 2641.8". Therefore set Pr. 90 = "2642".
(The value displayed has been converted into a value for internal use. Hence, simple addition of a
given value to the displayed value has no significance)
Setting "9999" disables the tuning data. The MM-CF constant is used for the IPM motor MM-CF,
and the inverter internal constant is used for a PM motor other than MM-CF.
Parameters referred to
Pr. 9 Electronic thermal O/L relay => page 5-303
Pr. 71 Applied motor => page 5-451
Pr. 178 to Pr. 189 (input terminal function selection) => page 5-439
Pr. 800 Control method selection => page 5-61