Mitsubishi Electric FR-E720-0.1K(SC) Instruction Manual page 127

To enter the Pr. 90 to Pr. 94 motor constants in [mH]
<Operating procedure>
1) Set Pr. 71 according to the motor used.
Motor
Mitsubishi standard motor
Mitsubishi high efficiency motor
Mitsubishi constant-torque motor
∗1
For other settings of Pr. 71, refer to page 118.
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 I2
V M
L1 = I1 + M: Primary inductance
L2 = I2 + M: Secondary inductance
Motor equivalent circuit diagram
Parameter
Name
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
Name
Number
83 Rated motor 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
SF-JR
SF-HR
SF-JRCA 4P
SF-HRCA
2
M
×
) 100 (%)
×
L1 L2
R1: Primary resistance
R2: Secondary resistance
I1: Primary leakage inductance
R2/S
I2: Secondary leakage inductance
M: Excitation inductance
S: Slip
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
Setting Range
0 to 1000V
10 to 120Hz
Refer to page 109
Refer to page 116
Refer to page 118
Refer to page 84
Refer to page 92
Refer to page 139
Refer to page 145
Refer to page 84
Selection and protection of a motor
Pr.71 Setting ∗1
0
40
1
50
Setting
Initial Value
Increments
0.01A
0.001Ω
0.001Ω
0.1mH
0.1mH
0.1%
0.01A
Setting
Increments
200V class
0.1V
400V class
0.01Hz
9999
9999
9999
9999
9999
9999
9999
Initial Value
200V
400V
60Hz
4
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