Mitsubishi Electric 800 Series Instruction Manual page 371

 Changing the motor constants (If setting a motor constants in the
internal data of the inverter)
• Set Pr.71 as follows.
IPM motor
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 Pr. motor Pr.
90 458
92 460
93 461
706 738
859 860
1412 1413
*1 For the FR-F860-00680 or lower.
*2 For the FR-F860-01080 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: To slightly increase 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.)
• Setting "9999" disables the tuning data. The inverter internal constant is used.
• To change a motor induced voltage constant of PM motors, the setting in Pr.706 Induced voltage constant (phi f) or
Pr.738 Second motor induced voltage constant (phi f) must be changed. If the constant after the change exceeds the
setting range of Pr.706 or Pr.738 (0 to 5000 mV (rad/s)), set Pr.1412 or Pr.1413 to set a value in the exponent n in the
following formula: Pr.706 (Pr.738) × 10
• When Pr.71 (Pr.450) = "8093, 8094, 9093, or 9094", or Pr.1412 (Pr.1413) = "9999", the motor induced voltage constant
is as set in Pr.706 (Pr.738). (No exponent setting)
Parameters referred to
Pr.9 Electronic thermal O/L relay
Pr.71 Applied motor
Pr.178 to Pr.189 (Input terminal function selection)
370
5. PARAMETERS
5.10 (C) Motor constant parameters
Motor
Name
Motor constant (R1) 0 to ***, 9999
Motor constant (L1)/d-
axis inductance (Ld)
Motor constant (L2)/q-
axis inductance (Lq)
Induced voltage
constant (phi f)
Torque current/Rated
PM motor current
Motor induced voltage
constant (phi f)
exponent
n
[mV (rad/s)] to set the induced voltage constant (phi f).
page 230
page 351
Pr.71 setting
8093 (8094)
9093 (9094)
Pr.684 = 0 (initial value)
Setting Setting
range increments
1
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
0 to 50 mH, 9999
0 to 5000 mV/s/rad,
9999
0 to 500 A, 9999
0 to 3600 A, 9999
0 to 2, 9999
page 343
Pr.684 = 1
Setting range Setting
increments
*1
0.001 Ω
*2
0.01 mΩ
*1
0.01 mH
*2
0.001 mH
*1
0.01 mH
*2
0.001 mH
0.1 mV/(rad/s)
*1 *1
0.01 A
*2 *2
0.1 A
1
Initial
value
*1 9999
*2
*1
*2
*1
*2