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PARAMETERS
5
Selection and protection of a motor
(5) Method to set the motor constants without using the offline auto tuning data
The Pr. 90 to Pr. 94 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. 90 to Pr. 94 motor constants in [Ω]
<Operating procedure>
1)Set Pr. 71 according to the motor used.
2)In the parameter setting mode, read the following parameters and set desired values.
3)Refer to the following table and set Pr. 83 and Pr. 84.
Star Connection Motor Delta Connection Motor
Setting
Standard motor 5 6
Constant-torque motor 15 16
Parameter
Number
Name Setting Range
Setting
Increments
Initial Value
82
Motor excitation current
(no load current)
0 to 500A, 9999 0.01A 9999
90 Motor constant (r1) 0 to 50Ω, 9999 0.001Ω 9999
91 Motor constant (r2) 0 to 50Ω, 9999 0.001Ω 9999
92 Motor constant (x1) 0 to 50Ω, 9999 0.001Ω 9999
93 Motor constant (x2) 0 to 50Ω, 9999 0.001Ω 9999
94 Motor constant (xm) 0 to 500Ω, 9999 0.01Ω 9999
859 Torque current 0 to 500A, 9999
0.01A 9999
Parameter
Number
Name Setting Range
Setting
Increments
Initial Value
83 Rated motor voltage 0 to 1000V 0.1V
200V class 200V
400V class 400V
84 Rated motor frequency 10 to 120Hz 0.01Hz 60Hz
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) constants are used.
NOTE
y If "star connection" is mistaken for "delta connection" or vice versa during setting of Pr. 71, Advanced magnetic flux
vector control and General-purpose magnetic flux vector control cannot be exercised properly.
Iq = I100
2
-I0
2
Iq =torque current, I100 =rated current, I0 =no load current