Mitsubishi Electric 800 Series Instruction Manual page 325

 Changing the motor constants (when setting a motor constants in the
internal data of the inverter)
• Set Pr.71 as follows.
Motor
IPM motor 8093
SPM motor 9093
• Set desired values as the motor constant parameters.
First motor Second
Pr. motor Pr.
90 458
92 460
93 461
706 738
859 860
1412 1413
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. (The value displayed has been converted into a value for internal use. Therefore, simple
addition of a value to the displayed value does not bring the desired effect.)
Setting example: to slightly increase the Pr.90 value (5%)
When "2516" is displayed for Pr.90, set 2642 (2516 × 1.05 = 2641.8) in Pr.90.
• If "9999" is set in the motor constant parameters, tuning data will be invalid and 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 Motor induced voltage constant (phi f) exponent or Pr.1413
Second motor induced voltage constant (phi f) exponent. Set a value in the exponent n in the formula, Pr.706 (Pr.738) ×
n
10 [mV (rad/s)], to set the induced voltage constant (phi f).
• When Pr.71 (Pr.450) = "8093 or 9093", 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
Pr.71 Applied motorpage 304
Pr.178 to Pr.189 (Input terminal function
324
13.(C) Motor Constant Parameters
13.3 Offline auto tuning for a PM motor (motor constant tuning)
Pr.71 setting
Name
Motor constant (R1)
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
relaypage 206
selection)page 292
Setting
Setting range
increments
0 to ***, 9999 1
Initial
value
9999