Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

Page: 682 / 1218

(C) Motor constant parameters Parameters
5 - 480
Changing the motor constant (if setting motor constants in units of [Ω], [mH] or [A])
●
Set Pr. 71 as shown below.
●
Set a given value as the motor constant parameter.
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.
●
For PM motors, set Pr. 1412 or Pr. 1413 to set a motor induced voltage constant (phi f ) exceeding
the setting range, 0 to 5000 mV (rad/s), of Pr. 706 or Pr. 738.
To set the induced voltage constant (phi f ) set a value in the exponent n in the formula:
Pr. 706 (Pr. 738) × 10
n
[mV/(rad/s)].
●
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)
Motor Pr. 71 setting
IPM motor
MM-CF 330
Other than MM-CF 8090
SPM motor 9090
Tab. 5-196: Motor selection
First Pr. Second Pr. Name Setting range
Setting
increments
Initial value
90 458 Motor constant (R1)
0 to 50 Ω, 9999 0.001 Ω
9999
0 to 400 mΩ, 9999 0.01 mΩ
92 460
Motor constant (L1)/
d-axis inductance (Ld)
0 to 500 mH, 9999 0.01 mH
0 to 50 mH, 9999 0.001 mH
93 461
Motor constant (L2)/
q-axis inductance (Lq)
0 to 500 mH, 9999 s 0.01 mH
0 to 50 mH, 9999 0.001 mH
706 738
Induced voltage constant
(phi f )
0 to 5000 mV/(rad/s), 9999 0.1 mV/(rad/s)
1412 1413
Motor induced voltage
constant (phi f ) exponent
0 to 2, 9999 1
859 860
Torque current/Rated PM
motor current
0 to 500 A, 9999 0.01 A
0 to 3600 A, 9999 0.1 A
Tab. 5-197: Parameter setting ranges
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.