Mitsubishi Electric FR-A820-00046 Instruction Manual page 683

Parameters
Changing the motor constant (if setting motor constants in the internal data of the inverter)
● Set Pr. 71 as follows.
Motor
IPM motor
SPM motor
Tab. 5-198: Motor selection
● 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".
First
motor
Pr.
90
92
93
706
859
Tab. 5-199: Parameter setting ranges
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.
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
Pr. 71
Pr. 178 to Pr. 189
Pr. 800
FR-A800
MM-CF
Other than MM-CF
Second
motor Name
Pr.
458 Motor constant (R1)
Motor constant (L1)/
460 d-axis inductance
(Ld)
Motor constant (L2)/
461 q-axis inductance
(Lq)
Induced voltage
738
constant (phi f)
Torque current/
860 Rated PM motor
current
Electronic thermal O/L relay
Applied motor
(input terminal function selection)
Control method selection
Pr. 684 = 0 (initial value)
Setting Setting in-
Range indication
range crements
0 to 400 mΩ, 9999
0 to 500 mH, 9999
0 to 50 mH, 9999
0 to ***, 0 to 500 mH, 9999
1
9999
0 to 50 mH, 9999
0 to 5000 mV/s/rad,
0 to 500 A, 9999
0 to 3600 A, 9999
(C) Motor constant parameters
Pr. 71 setting
333 (334)
8093 (8094)
9093 (9094)
Pr. 684 = 1
Unit
indication
0 to 50 Ω, 9999 0.001 Ω
0.01 mΩ
0.01 mH
0.001 mH
0.01 mH
0.001 mH
0.1 mV/
(rad/s)
9999
0.01 A
0.1 A
=> page 5-303
=> page 5-451
=> page 5-439
=> page 5-61
Initial
value
9999
5 - 481