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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.
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 .
* The initial value differs according to the voltage level. (200V/400V)
Star Connection
Motor
Delta Connection
Motor
Setting
Standard motor 5 6
Constant-torque motor 15 16
Parameters
Number
Name Setting Range
Setting
Increments
Initial
Value
82
Motor excitation current
(no load current)
55K or lower 0 to 500A, 9999 0.01A
9999
75K or higher 0 to 3600A, 9999 0.1A
90 Motor constant (r1)
55K or lower 0 to 50Ω, 9999 0.001Ω
9999
75K or higher 0 to 400mΩ, 9999 0.01mΩ
91 Motor constant (r2)
55K or lower 0 to 50Ω, 9999 0.001Ω
9999
75K or higher 0 to 400mΩ, 9999 0.01mΩ
92 Motor constant (x1)
55K or lower 0 to 50Ω, 9999 0.001Ω
9999
75K or higher 0 to 3600mΩ, 9999 0.01mΩ
93 Motor constant (x2)
55K or lower 0 to 50Ω, 9999 0.001Ω
9999
75K or higher 0 to 3600mΩ, 9999 0.01mΩ
94 Motor constant (xm)
55K or lower 0 to 500Ω, 9999
0.01Ω 9999
75K or higher 0 to 100Ω, 9999
859 Torque current
55K or lower 0 to 500A, 9999 0.01A
9999
75K or higher 0 to 3600A, 9999 0.1A
Parameter
Number
Name Setting Range
Setting
Increments
Initial
Value
83 Rated motor voltage 0 to 1000V 0.1V 200V/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, 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.
Iq = I
100
2
-I
0
2
Iq = torque current, I
100 =
rated current, I
0 =
no load curren
t