Mitsubishi Electric F700, Instruction Manual

Page: 77 / 341

68
Adjustment of the output torque (current) of the motor
4.3.2 Simple magnetic flux vector control (Pr.80, Pr.90)
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 173)
(1) Automatically control optimum torque
(Pr.80)
˜
When Simple magnetic flux vector control is not used, set "9999" (initial value) in Pr.80 .
˜
Set the used motor capacity (equal to or one rank higher than the inverter capacity).
(2) Set the motor constant (Pr.90)
˜
Normally setting is not necessary. When you need more torque under Simple magnetic flux vector control for other
manufacturer’’s motor, set the motor primary resistance value (R1) for
connection. When the setting value is
"
9999
"
(initial value), the motor constant is based on the Mitsubishi motor constant (SF-JR, SF-HRCA).
Providing optimum excitation to the motor can also produce high torque in a low-speed range.
(Simple magnetic flux vector control)
Parameter
Number
Name
Initial
Value
Setting Range Description
80
Motor capacity(Simple
magnetic flux vector control)
9999
01160 or less
0.4 to
55kW
Set the capacity of the motor used to
select simple magnetic flux vector
control.
01800 or more
0 to
3600kW
9999 V/F control is performed
90 Motor constant (R1) 9999
01160 or less 0 to 50
:
Used to set the motor primary
resistance value.
(Normally setting is not necessary.)
01800 or more
0 to
400m
:
9999
Use the Mitsubishi motor (SF-JR, SF-
HRCA) constants
POINT
˜
The number of motor poles should be any of 2, 4 and 6 poles.
˜
Single-motor operation (One motor for one inverter)
˜
The wiring length from inverter to motor should be within 30m
REMARKS
When using a constant-torque motor, set Pr. 71 Applied motor to "1" (constant-torque motor).
CAUTION
˜
When Simple magnetic flux vector control is selected, the rated motor frequency is set in Pr. 3 and the rated motor voltage is set in
Pr. 19 . The base frequency voltage is handled as 400V when "9999" or "8888" is set in Pr. 19 .
˜
Adjustable 5 points V/F, energy saving operation mode, Optimum excitation control function only under V/F control. They do not
function for Simple magnetic flux vector control.
i
Parameters referred to
i
Pr. 3 Base frequency, Pr. 19 Base frequency voltage Refer to page 78
Pr. 60 Energy saving control selection Refer to page 147
Pr. 71 Applied motor Refer to page 99
Pr. 77 Parameter write selection Refer to page 172