Mitsubishi FR-A800 Instruction Manual page 460

NOTE
• 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.
Changing the motor constants (If setting a motor constants in the
internal data of the inverter)
• Set Pr.71 as follows.
Motor
MM-CF
IPM motor
Other than MM-CF
SPM motor
• Set given values as the motor constant parameters. The displayed increments of the read motor constants can be changed
with Pr.684 Tuning data unit switchover.
First Second
motor motor
Pr. Pr.
90 458 Motor constant (R1)
Motor constant (L1)/d-
92 460
axis inductance (Ld)
Motor constant (L2)/q-
93 461
axis inductance (Lq)
Induced voltage
706 738
constant (phi f)
Torque current/Rated
859 860
PM motor current

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.
NOTE
• 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:
• 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
Pr.71 Applied motor page 438
Pr.178 to Pr.189 (input terminal function selection)
Pr.800 Control method selection
Pr.71 setting
333 (334)
8093 (8094)
9093 (9094)
Pr.684 = 0 (initial value)
Name
Setting
range
0 to ***, 9999
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)
page 331
page 430
page 164
(C) Motor constant parameters
Pr.684 = 1
Setting
Range indication
increments
0 to 50 Ω, 9999

0 to 400 mΩ, 9999
0 to 500 mH, 9999
0 to 50 mH, 9999
0 to 500 mH, 9999
1
0 to 50 mH, 9999
0 to 5000 mV/s/rad,
9999
0 to 500 A, 9999
0 to 3600 A, 9999
Initial
Unit
value
indication
0.001 Ω

0.01 mΩ
 
0.01 mH
 
0.001 mH
 
0.01 mH
 
9999
0.001 mH
 
0.1 mV/(rad/s)
0.01 A
 
0.1 A
 
PARAMETERS
5
GROUP
C
459