Mitsubishi Electric FR-A800 Series Instruction Manual page 542

 Changing the motor constants (when setting the Pr.92, Pr.93, and Pr.94
motor constants in units of Ω)
• Set Pr.71 as follows.
Applied motor
Standard motor
Constant-torque motor
• Set desired values as the motor constant parameters.
Iq = torque current, I
Iq = I 2
100
First motor Second
Pr. motor Pr.
82 455
90 458
91 459
92 460
93 461
94 462
859 860
298 560
*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.
NOTE
• If "wye connection" or "delta connection" is incorrectly selected in Pr.71, Advanced magnetic flux vector control, Real
sensorless vector control, and Vector control are not performed properly.
• If "9999" is set, tuning data will be invalid and the constant values for Mitsubishi Electric motors (SF-PR, SF-JR, SF-HR, SF-
JRCA, SF-HRCA and SF-V5RU (1500 r/min series) and so on) are used.
 Tuning the second motor
• When one inverter switches the operation between two different motors, set the second motor in Pr.450 Second applied
motor. (Refer to
• Turning ON the RT signal enables the parameter settings for the second motor as follows.
Motor capacity
Number of motor poles
Motor excitation current
Rated motor voltage
Rated motor frequency
Motor constant (R1)
Motor constant (R2)
Motor constant (L1)/d-axis inductance (Ld)
Motor constant (L2)/q-axis inductance (Lq)
Motor constant (X)
Auto tuning setting/status
Frequency search gain
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5
15
rated current, I no load current
100 = 0 =
- I 2
0
Name
Motor excitation current (no
load current)
Motor constant (r1)
Motor constant (r2)
Motor constant (x1)
Motor constant (x2)
Motor constant (xm)
Torque current/Rated PM motor
current
Frequency search gain
page 528.) In the initial setting, no second motor is applied.
Function
search engine
Wye connection motor
Setting range
*1
0 to 500 A, 9999
*2
0 to 3600 A, 9999
*1
0 to 50 Ω, 9999
*2
0 to 400 mΩ, 9999
*1
0 to 50 Ω, 9999
*2
0 to 400 mΩ, 9999
*1
0 to 50 Ω, 9999
*2
0 to 3600 mΩ, 9999
*1
0 to 50 Ω, 9999
*2
0 to 3600 mΩ, 9999
*1
0 to 500 Ω, 9999
*2
0 to 100 Ω, 9999
*1
0 to 500 A, 9999
*2
0 to 3600 A, 9999
0 to 32767, 9999
RT signal ON (second motor)
Pr.453
Pr.454
Pr.455
Pr.456
Pr.457
Pr.458
Pr.459
Pr.460
Pr.461
Pr.462
Pr.463
Pr.560
Pr.71 setting
Delta connection motor
6
16
Setting increments
*1
0.01 A
*2
0.1 A
*1
0.001 Ω
*2
0.01 mΩ
*1
0.001 Ω
*2
0.01 mΩ
*1
0.001 Ω
9999
*2
0.1 mΩ
*1
0.001 Ω
*2
0.1 mΩ
0.01 Ω
*1
0.01 A
*2
0.1 A
1
RT signal OFF (first motor)
Pr.80
Pr.81
Pr.82
Pr.83
Pr.84
Pr.90
Pr.91
Pr.92
Pr.93
Pr.94
Pr.96
Pr.298
5.13 (C) Motor constant parameters
1
2
3
4
Initial value
5
6
7
8
9
10
541
5. PARAMETERS