Offline Auto Tuning For A Pm Motor (Motor Constant Tuning) - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

• Turning ON the RT signal enables the parameter settings for the second motor as follows.
Function
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
NOTE
• The RT signal is assigned to terminal RT in the initial status. Set "3" in one of Pr.178 to Pr.189 (Input terminal function
selection) to assign the RT signal to another terminal.
• Changing the terminal assignment using Pr.178 to Pr.189 (input terminal function selection) may affect the other functions.
Set parameters after confirming the function of each terminal.
Parameters referred to
Pr.1 Maximum frequencypage 407
Pr.9 Electronic thermal O/L relaypage 394
Pr.31 to Pr.36 Frequency jumppage 408
Pr.71 Applied motorpage 505
Pr.156 Stall prevention operation selectionpage 409
Pr.178 to Pr.189 (input terminal function
Pr.190 to Pr.196 (output terminal function
Pr.800 Control method selectionpage 215
5.13.3 Offline auto tuning for a PM motor (motor constant
tuning)
PM PM PM
The offline auto tuning enables the optimal operation of a PM motor.
• Automatic measurement of motor constants (offline auto tuning) enables optimal operation of motors for PM sensorless
vector control even when motor constants vary or when the wiring distance is long. IPM and SPM motors other than the
MM-CF IPM motor can also be used.
For the offline auto tuning under Advanced magnetic flux vector control, Real sensorless vector control, and Vector control,
refer to page 509.
Pr. Name
684 Tuning data unit
C000 switchover
71
Applied motor
C100
80
Motor capacity
C101
81
Number of motor poles 9999
C102
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
selection)page 496
selection)page 450
Initial
Setting range
value
0
0
1
0 to 6, 13 to 16, 20, 23, 24,
30, 33, 34, 40, 43, 44, 50,
0 53, 54, 70, 73, 74, 330,
333, 334, 8090, 8093,
8094, 9090, 9093, 9094
*2
0.4 to 55 kW
9999
*3
0 to 3600 kW
9999
2, 4, 6, 8, 10, 12
9999
RT signal-OFF
Pr.80
Pr.81
Pr.82
Pr.83
Pr.84
Pr.90
Pr.91
Pr.92
Pr.93
Pr.94
Pr.96
Pr.298
Description
Internal data converted value
The value is indicated in A, Ω, mH, or mV.
By selecting a motor, the thermal characteristic and motor
constant of each motor are set.
Set the applied motor capacity.
V/F control
Set the number of motor poles.
V/F control
5.13 (C) Motor constant parameters
(first motor)
519
5. PARAMETERS
1
2
3
4
5
6
7
8
9
10