Mitsubishi FR-A740-00023-EC, Instruction Manual

Page: 199 / 474

189
Selection and protection of a motor
4
P
ARAME
T
E
R
S
•
To enter the Pr. 92 and Pr. 93 motor constants in [mH]
<Operating procedure>
1) Set Pr. 71 according to the motor used.
*1 For other settings of Pr. 71 , refer to the page 179 .
2) In the parameter setting mode, read the following parameters and set desired values.
Calculate the Pr. 94 value from the following formula.
3)Refer to the following table and set
Pr. 83
and
Pr. 84
.
Motor Pr.71 Setting
*
Mitsubishi standard
motor
Mitsubishi high
efficiency motor
SF-JR 0
SF-JR 4P 1.5kW or less 20
SF-HR 40
Mitsubishi constant-
torque motor
SF-JRCA 4P
SF-TH (constant torque)
1
SF-HRCA 4P 50
Vector control
dedicated motor
SF-V5RU 30
Pr. 94 setting = (1 -
M
2
)
×
100 (%)
L1
×
L2
Motor equivalent circuit diagram
Parameter
Number
Name Setting Range
Setting
Increments
Initial
Value
82
Motor excitation current
(no load current)
01800 or less 0 to 500A, 9999 0.01A
9999
02160 or more 0 to 3600A, 9999 0.1A
90 Motor constant (R1)
01800 or less 0 to 50
Ω
, 9999 0.001
Ω
9999
02160 or more 0 to 400m
Ω
, 9999 0.01m
Ω
91 Motor constant (R2)
01800 or less 0 to 50
Ω
, 9999 0.001
Ω
9999
02160 or more 0 to 400m
Ω
, 9999 0.01m
Ω
92 Motor constant (L1)
01800 or less 0 to 1000mH, 9999 0.1mH
9999
02160 or more 0 to 400mH, 9999 0.01mH
93 Motor constant (L2)
01800 or less 0 to 1000mH, 9999 0.1mH
9999
02160 or more 0 to 400mH, 9999 0.01mH
94 Motor constant (X)
01800 or less 0 to 100%, 9999 0.1%
9999
02160 or more 0 to 100
%
, 9999 0.01%
859 Torque current
01800 or less 0 to 500A, 9999 0.01A
9999
02160 or more 0 to 3600A, 9999 0.1A
Parameter
Number
Name Setting Range
Setting
Increments
Initial
Value
83 Motor rated voltage 0 to 1000V 0.1V 400V
84 Rated motor frequency 10 to 120Hz 0.01Hz 50Hz
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)
constants are used.
L1= I1+ M: Primary inductance
L2= I2+ M: Secondary inductance
M V
R2/S
R1 I1 I2
R1: Primary resistance
I1: Primary leakage inductance
I2: Secondary leakage inductance
M: Excitation inductance
S: Slip
R2: Secondary resistance