Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 526

 Parameters updated by tuning results after tuning
First motor Second
Pr. motor Pr.
90 458 Motor constant (R1)
Motor constant (L1)/d-axis
92 460
inductance (Ld)
Motor constant (L2)/q-axis
93 461
inductance (Lq)
711 739 Motor Ld decay ratio
712 740 Motor Lq decay ratio
Starting resistance tuning
717 741
compensation
Starting magnetic pole position
721 742
detection pulse width
Torque current/Rated PM
859 860
motor current
96 463 Auto tuning setting/status
 Tuning adjustment (Pr.1002)
• The overcurrent protective function may be activated during Lq tuning for an easily magnetically saturated motor (motor
with a large Lq decay ratio). In such case, adjust the target flowing current used for tuning with Pr.1002 Lq tuning target
current adjustment coefficient.
 Changing the motor constants
• The motor constants can be set directly when the motor constants are known in advance, or by using the data measured
during offline auto tuning.
• According to the Pr.71 (Pr.450) setting, the range of the motor constant parameter setting values and units can be
changed. The changed settings are stored in the EEPROM as the motor constant parameters.
 Changing the motor constants (when setting motor constants in units of
Ω, mH, or A)
• Set Pr.71 as follows.
IPM motor
SPM motor
• Set desired values as the motor constant parameters.
First motor Second
Pr. motor Pr.
90 458 Motor constant (R1)
92 460 Motor constant (L1)/d-axis inductance (Ld)
93 461 Motor constant (L2)/q-axis inductance (Lq)
706 738 Induced voltage constant (phi f)
859 860 Torque current/Rated PM motor current
Motor induced voltage constant (phi f)
1412 1413
exponent
*1 For the FR-A820-03160(55K) or lower, and FR-A840-01800(55K) or lower.
*2 For the FR-A820-03800(75K) or higher, and FR-A840-02160(75K) or higher.
Other than MM-CF
Name
Pr.96 (Pr.463) = 1
○
○
○
○
○
○
○
○
○
Motor
MM-CF
Other than MM-CF
Name
V/F control, MM-CF
Pr.96 (Pr.463) = 11
○
—
—
—
—
○
—
—
○
Pr.71 setting
330
8090
9090
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), 9999 0.1 mV (rad/s)
*1
0 to 500 A, 9999 0.01 A
*2
0 to 3600 A, 9999 0.1 A
0 to 2, 9999 1
5.13 (C) Motor constant parameters
Description
Resistance per phase
d-axis inductance
q-axis inductance
d-axis inductance decay ratio
q-axis inductance decay ratio
When the setting value is
10000 or more: With polarity
inversion for compensation,
voltage pulse (Pr. setting
minus 10000) μs
Setting
Initial value
*1
*2
*1
*2
*1
9999
*2
*1
*2
5. PARAMETERS
1
2
3
4
5
6
7
8
9
10
525