Mitsubishi Electric FR-E720-600 Instruction Manual page 122

Selection and protection of a motor
To enter the Pr. 90 and Pr. 94 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
∗1
For other settings of Pr. 71, refer to page 111.
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 Motor rated voltage
84 Rated Motor Frequency
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.
Parameters referred to
Pr. 7 Acceleration time, Pr. 8 Deceleration time
Pr. 9 Electronic thermal O/L relay
Pr. 71 Applied motor
Pr. 80 Motor capacity, Pr. 81 Number of motor poles
Pr. 156 Stall prevention operation selection
Pr. 178 to Pr. 184 (input terminal function selection)
Pr. 190 to Pr. 192 (output terminal function selection)
Pr. 800 Control method selection
120
Motor
SF-JR
SF-HR
SF-JRCA 4P
SF-HRCA 4P
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 Setting Range
0 to 500A, 9999
0 to 50Ω, 9999
0 to 50Ω, 9999
0 to 1000mH, 9999
0 to 1000mH, 9999
0 to 100%, 9999
0 to 500A, 9999
Name Setting Range
0 to 1000V
10 to 120Hz
Refer to page 102
Refer to page 109
Refer to page 111
Refer to page 85
Refer to page 76
Pr.71 Setting ∗1
0
40
1
50
Setting
Increments
0.01A
0.001Ω
0.001Ω
0.1mH
0.1mH
0.1%
0.01A
Setting
Increments
0.1V
0.01Hz
Refer to page 76
Refer to page 131
Refer to page 137
Initial Value
9999
9999
9999
9999
9999
9999
9999
Initial Value
200V class 200V
400V class 400V
60Hz