Mitsubishi Electric FR-A720-0.4K Instruction Manual page 208

• To enter the Pr. 92 and Pr. 93 motor constants in [mH]
<Operating procedure>
1) Set Pr. 71 according to the motor used.
Mitsubishi standard
motor
Mitsubishi high
efficiency motor
Mitsubishi constant-
torque motor
Vector control
dedicated motor
*1 For other settings of Pr. 71, refer to page 187.
2) In the parameter setting mode, read the following parameters and set desired values.
Calculate the Pr. 94 value from the following formula.
Pr. 94 setting = (1 -
R1 I1
V M
L1= I1+ M: Primary inductance
L2= I2+ M: Secondary inductance
Motor equivalent circuit diagram
Parameter
Number
Motor excitation current
82
(no load current)
90 Motor constant (R1)
91 Motor constant (R2)
92 Motor constant (L1)
93 Motor constant (L2)
94 Motor constant (X)
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.
Motor
SF-JR
SF-JR 4P 1.5kW or lower
SF-HR
SF-JRCA 4P
SF-TH (constant torque)
SF-HRCA
SF-V5RU (1500r/min series)
SF-V5RU (except for 1500r/min series)
2
M
×
) 100 (%)
×
L1 L2
I2
R1: Primary resistance
R2: Secondary resistance
I1: Primary leakage inductance
R2/S
I2: Secondary leakage inductance
M: Excitation inductance
S: Slip
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 Setting Range
0 to 1000V
10 to 120Hz
Selection and protection of a motor
Pr.71 Setting
*1
0
20
40
1
50
30
14
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 1000mH, 9999
0 to 400mH, 9999
0 to 1000mH, 9999
0 to 400mH, 9999
0 to 100%, 9999
0 to 100%, 9999
0 to 500A, 9999
0 to 3600A, 9999
Setting
Increments
0.1V
0.01Hz
Setting Initial
Increments Value
0.01A
9999
0.1A
0.001Ω
9999
0.01mΩ
0.001Ω
9999
0.01mΩ
0.1mH
9999
0.01mH
0.1mH
9999
0.01mH
0.1%
9999
0.01%
0.01A
9999
0.1A
Initial
Value
200V/400V*
60Hz
197
4