Mitsubishi Electric FR-F800 Series Instruction Manual page 400

 Changing the motor constants (when setting a motor constants in the
internal data of the inverter)
• Set Pr.71 as follows.
IPM motor
SPM motor
• Set desired values as the motor constant parameters. The displayed increments of the read motor constants can be
changed with Pr.684 Tuning data unit switchover. Setting Pr.684 = "1" disables parameter setting changes.
First motor
Pr. motor Pr.
90 458
92 460
93 461
706 738
859 860
1412 1413
*1 For the FR-F820-02330(55K) or lower, and FR-F840-01160(55K) or lower.
*2 For the FR-F820-03160(75K) or higher, and FR-F840-01800(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. (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, tuning data will be invalid. The MM-EFS or MM-THE4 constant is used for the IPM motor MM-EFS or MM-
THE4, and the inverter internal constant is used for a PM motor other than MM-EFS or MM-THE4.
• 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) ×
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
Pr.71 Applied motorpage 379
Pr.178 to Pr.189 (Input terminal function
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Motor
MM-EFS (1500 r/min specification) / MM-THE4
MM-EFS (3000 r/min specification)
Other than MM-EFS/MM-THE4
Second
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
n
[mV (rad/s)], to set the induced voltage constant (phi f).
relaypage 266
selection)page 373
search engine
213 (214)
243 (244)
8093 (8094)
9093 (9094)
Pr.684 = 0 (initial value)
Setting
Setting range
increments
0 to ***, 9999 1
Pr.71 setting
Pr.684 = 1
Setting
Setting range
increments
*1
0 to 50 Ω, 9999 0.001 Ω
*2
0 to 400 mΩ, 9999 0.01 mΩ
*1
0 to 500 mH, 9999 0.01 mH
*2
0 to 50 mH, 9999 0.001 mH
*1
0 to 500 mH, 9999 0.01 mH
*2
0 to 50 mH, 9999 0.001 mH
0 to 5000 mV (rad/s),
0.1 mV (rad/s)
9999
*1 *1
0 to 500 A, 9999 0.01 A
*2 *2
0 to 3600 A, 9999 0.1 A
0 to 2, 9999 1
5. PARAMETERS
5.10 (C) Motor constant parameters
1
2
3
4
Initial
value
5
*1
*2
*1
6
*2
*1
*2
7
9999
8
9
10
399