Mitsubishi Electric 800 Series Instruction Manual page 434

Changing the motor constants (If setting motor constants in the internal
data of the inverter)
• Set Pr.71 as follows.
Motor
Standard motor
Constant-torque motor
Vector control dedicated motor
Other manufacturer's standard motor
Other manufacturer's constant-torque 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.
Motor excitation
82 455
current
90 458 Motor constant (R1)
91 459 Motor constant (R2)
Motor constant (L1)/d-
92 460
axis inductance (Ld)
Motor constant (L2)/q-
93 461
axis inductance (Lq)
94 462 Motor constant (X)
Torque current/Rated
859 860
PM motor current
298 560 Frequency search gain

For the FR-A860-01080 or lower.

For the FR-A860-01440 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:
• "If "9999" is set, tuning data will be invalid and the motor constant values for standard motors / vector control dedicated
motors are used.
Pr.71 setting
3 (4)
13 (14)
33 (34)
3 (4)
13 (14)
Pr.684 = 0 (initial value)
Name
Setting range
0 to ***, 9999
0 to 32767, 9999
To slightly increase the Pr.90 value (5%)
If Pr.90 = "2516" is displayed,
the value is 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.)
(C) Motor constant parameters
Pr.684 = 1
Setting
Range indication
increments
0 to 500 A, 9999
0 to 3600 A, 9999
0 to 50 Ω, 9999

0 to 400 mΩ, 9999
0 to 50 Ω, 9999

0 to 400 mΩ, 9999
0 to 6000 mH, 9999
1
0 to 400 mH, 9999
0 to 6000 mH, 9999
0 to 400 mH, 9999
0 to 100%, 9999
0 to 500 A, 9999
0 to 3600 A, 9999
1 0 to 32767, 9999
Initial
Unit
value
indication
0.01 A
 
0.1 A
 
0.001 Ω

0.01 mΩ
 
0.001 Ω

0.01 mΩ
 
0.1 mH
 
0.01 mH 9999
 
0.1 mH
 
0.01 mH
 
0.1%

0.01%

0.01 A
 
0.1 A
 
1
433
PARAMETERS
5
GROUP
C