Mitsubishi Electric FR-A720-0.4K Instruction Manual page 207

Selection and protection of a motor
(5) Method to set the motor constants without using the offline auto tuning data
The Pr. 92 and Pr. 93 motor constants may either be entered in [Ω] or in [mH]. Before starting operation, confirm which
motor constant unit is used.
• To enter the Pr. 92 and Pr. 93 motor constants in [Ω]
<Operating procedure>
1) Set Pr. 71 according to the motor used.
Standard motor
Setting
Constant-torque motor
2) In the parameter setting mode, read the following parameters and set desired values.
Iq = torque current, I
2
Iq = I - I
100
Parameters
Number
Motor excitation current
82
(no load current)
90 Motor constant (r1)
91 Motor constant (r2)
92 Motor constant (x1)
93 Motor constant (x2)
94 Motor constant (xm)
859 Torque current
3)Refer to the following table and set Pr. 83 and Pr. 84 .
Parameter
Number
83 Rated motor voltage
84 Rated motor frequency
* The initial value differs according to the voltage level. (200V/400V)
REMARKS
· When "9999" is set in Pr. 82, Pr. 90 to Pr. 94, Pr. 859, Mitsubishi motor (SF-JR, SF-HR, SF-JRCA, SF-HRCA, SF-V5RU (1500r/
min series), etc.) constants are used.
CAUTION
· If "star connection" is mistaken for "delta connection" or vice versa during setting of Pr. 71, Advanced magnetic flux vector
control, Real sensorless vector control and vector control cannot be exercised properly.
196
Star Connection
Motor
rated current, I no load current
100 = 0 =
2
0
Name
55K or lower
75K or higher
55K or lower
75K or higher
55K or lower
75K or higher
55K or lower
75K or higher
55K or lower
75K or higher
55K or lower
75K or higher
55K or lower
75K or higher
Name
Delta Connection
Motor
5 6
15 16
Setting Range
0 to 500A, 9999
0 to 3600A, 9999
0 to 50Ω, 9999
0 to 400mΩ, 9999
0 to 50Ω, 9999
0 to 400mΩ, 9999
0 to 50Ω, 9999
0 to 3600mΩ, 9999
0 to 50Ω, 9999
0 to 3600mΩ, 9999
0 to 500Ω, 9999
0 to 100Ω, 9999
0 to 500A, 9999
0 to 3600A, 9999
Setting Range
0 to 1000V
10 to 120Hz
Setting
Increments
0.01A
0.1A
0.001Ω
0.01mΩ
0.001Ω
0.01mΩ
0.001Ω
0.01mΩ
0.001Ω
0.01mΩ
0.01Ω
0.01A
0.1A
Setting Initial
Increments Value
0.1V 200V/400V*
0.01Hz 60Hz
Initial
Value
9999
9999
9999
9999
9999
9999
9999